MDL-21250 capital letters removal
[moodle.git] / pluginfile.php
blob0ab842897060ee086aedfcec43883de065261d5f
1 <?php
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.
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/>.
18 /**
19 * This script delegates file serving to individual plugins
21 * @package core
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
27 // disable moodle specific debug messages and any errors in output
28 //define('NO_DEBUG_DISPLAY', true);
29 //TODO: uncomment this once the file api stabilises a bit more
31 require_once('config.php');
32 require_once('lib/filelib.php');
34 $relativepath = get_file_argument();
35 $forcedownload = optional_param('forcedownload', 0, PARAM_BOOL);
37 // relative path must start with '/'
38 if (!$relativepath) {
39 print_error('invalidargorconf');
40 } else if ($relativepath[0] != '/') {
41 print_error('pathdoesnotstartslash');
44 // extract relative path components
45 $args = explode('/', ltrim($relativepath, '/'));
47 if (count($args) < 3) { // always at least context, component and filearea
48 print_error('invalidarguments');
51 $contextid = (int)array_shift($args);
52 $component = clean_param(array_shift($args), PARAM_SAFEDIR);
53 $filearea = clean_param(array_shift($args), PARAM_SAFEDIR);
55 list($context, $course, $cm) = get_context_info_array($contextid);
57 $fs = get_file_storage();
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]);
61 if (!empty($CFG->excludeoldflashclients) && $mimetype == 'application/x-shockwave-flash'&& !empty($SESSION->flashversion)) {
62 $userplayerversion = explode('.', $SESSION->flashversion);
63 $requiredplayerversion = explode('.', $CFG->excludeoldflashclients);
64 if (($userplayerversion[0] < $requiredplayerversion[0]) ||
65 ($userplayerversion[0] == $requiredplayerversion[0] && $userplayerversion[1] < $requiredplayerversion[1]) ||
66 ($userplayerversion[0] == $requiredplayerversion[0] && $userplayerversion[1] == $requiredplayerversion[1]
67 && $userplayerversion[2] < $requiredplayerversion[2])) {
68 $path = $CFG->dirroot."/lib/flashdetect/flashupgrade.swf"; // Alternate content asking user to upgrade Flash
69 $filename = "flashupgrade.swf";
70 send_file($path, $filename, O, 0, false, false, 'application/x-shockwave-flash'); // Do not cache
74 // ========================================================================================================================
75 if ($component === 'blog') {
76 // Blog file serving
77 if ($context->contextlevel != CONTEXT_SYSTEM) {
78 send_file_not_found();
80 if ($filearea !== 'attachment' and $filearea !== 'post') {
81 send_file_not_found();
84 if (empty($CFG->bloglevel)) {
85 print_error('siteblogdisable', 'blog');
88 if ($CFG->bloglevel < BLOG_GLOBAL_LEVEL) {
89 require_login();
90 if (isguestuser()) {
91 print_error('noguest');
93 if ($CFG->bloglevel == BLOG_USER_LEVEL) {
94 if ($USER->id != $entry->userid) {
95 send_file_not_found();
99 $entryid = (int)array_shift($args);
100 if (!$entry = $DB->get_record('post', array('module'=>'blog', 'id'=>$entryid))) {
101 send_file_not_found();
104 if ('publishstate' === 'public') {
105 if ($CFG->forcelogin) {
106 require_login();
109 } else if ('publishstate' === 'site') {
110 require_login();
111 //ok
112 } else if ('publishstate' === 'draft') {
113 require_login();
114 if ($USER->id != $entry->userid) {
115 send_file_not_found();
119 $filename = array_pop($args);
120 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
122 if (!$file = $fs->get_file($context->id, $component, $filearea, $entryid, $filepath, $filename) or $file->is_directory()) {
123 send_file_not_found();
126 send_stored_file($file, 10*60, 0, true); // download MUST be forced - security!
128 // ========================================================================================================================
129 } else if ($component === 'grade') {
130 if (($filearea === 'outcome' or $filearea === 'scale') and $context->contextlevel == CONTEXT_SYSTEM) {
131 // Global gradebook files
132 if ($CFG->forcelogin) {
133 require_login();
136 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
138 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
139 send_file_not_found();
142 session_get_instance()->write_close(); // unlock session during fileserving
143 send_stored_file($file, 60*60, 0, $forcedownload);
145 } else if ($filearea === 'feedback' and $context->contextlevel == CONTEXT_COURSE) {
146 //TODO: nobody implemented this yet in grade edit form!!
147 send_file_not_found();
149 if ($CFG->forcelogin || $course->id != SITEID) {
150 require_login($course);
153 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
155 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
156 send_file_not_found();
159 session_get_instance()->write_close(); // unlock session during fileserving
160 send_stored_file($file, 60*60, 0, $forcedownload);
161 } else {
162 send_file_not_found();
165 // ========================================================================================================================
166 } else if ($component === 'tag') {
167 if ($filearea === 'description' and $context->contextlevel == CONTEXT_SYSTEM) {
169 // All tag descriptions are going to be public but we still need to respect forcelogin
170 if ($CFG->forcelogin) {
171 require_login();
174 $fullpath = "/$context->id/tag/description/".implode('/', $args);
176 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
177 send_file_not_found();
180 session_get_instance()->write_close(); // unlock session during fileserving
181 send_stored_file($file, 60*60, 0, true);
183 } else {
184 send_file_not_found();
187 // ========================================================================================================================
188 } else if ($component === 'calendar') {
189 if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_SYSTEM) {
191 // All events here are public the one requirement is that we respect forcelogin
192 if ($CFG->forcelogin) {
193 require_login();
196 // Get the event if from the args array
197 $eventid = array_shift($args);
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();
203 // Check that we got an event and that it's userid is that of the user
205 // Get the file and serve if successful
206 $filename = array_pop($args);
207 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
208 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
209 send_file_not_found();
212 session_get_instance()->write_close(); // unlock session during fileserving
213 send_stored_file($file, 60*60, 0, $forcedownload);
215 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_USER) {
217 // Must be logged in, if they are not then they obviously can't be this user
218 require_login();
220 // Don't want guests here, potentially saves a DB call
221 if (isguestuser()) {
222 send_file_not_found();
225 // Get the event if from the args array
226 $eventid = array_shift($args);
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'))) {
230 send_file_not_found();
233 // Get the file and serve if successful
234 $filename = array_pop($args);
235 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
236 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
237 send_file_not_found();
240 session_get_instance()->write_close(); // unlock session during fileserving
241 send_stored_file($file, 60*60, 0, $forcedownload);
243 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_COURSE) {
245 // Respect forcelogin and require login unless this is the site.... it probably
246 // should NEVER be the site
247 if ($CFG->forcelogin || $course->id != SITEID) {
248 require_login($course);
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?
254 send_file_not_found();
257 // Get the event id
258 $eventid = array_shift($args);
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'=>$course->id))) {
265 send_file_not_found();
268 // If its a group event require either membership of view all groups capability
269 if ($event->eventtype === 'group') {
270 if (!has_capability('moodle/site:accessallgroups', $context) && !groups_is_member($event->groupid, $USER->id)) {
271 send_file_not_found();
273 } else if ($event->eventtype === 'course') {
274 //ok
275 } else {
276 // some other type
277 send_file_not_found();
280 // If we get this far we can serve the file
281 $filename = array_pop($args);
282 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
283 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
284 send_file_not_found();
287 session_get_instance()->write_close(); // unlock session during fileserving
288 send_stored_file($file, 60*60, 0, $forcedownload);
290 } else {
291 send_file_not_found();
294 // ========================================================================================================================
295 } else if ($component === 'user') {
296 if ($filearea === 'icon' and $context->contextlevel == CONTEXT_USER) {
297 if (!empty($CFG->forcelogin) and !isloggedin()) {
298 // protect images if login required and not logged in;
299 // do not use require_login() because it is expensive and not suitable here anyway
300 redirect($OUTPUT->pix_url('u/f1'));
302 $filename = array_pop($args);
303 if ($filename !== 'f1' and $filename !== 'f2') {
304 redirect($OUTPUT->pix_url('u/f1'));
306 if (!$file = $fs->get_file($context->id, 'user', 'icon', 0, '/', $filename.'/.png')) {
307 if (!$file = $fs->get_file($context->id, 'user', 'icon', 0, '/', $filename.'/.jpg')) {
308 redirect($OUTPUT->pix_url('u/f1'));
312 send_stored_file($file, 60*60*24); // enable long caching, there are many images on each page
314 } else if ($filearea === 'private' and $context->contextlevel == CONTEXT_USER) {
315 require_login();
317 if (isguestuser()) {
318 send_file_not_found();
321 if ($USER->id !== $context->instanceid) {
322 send_file_not_found();
325 $filename = array_pop($args);
326 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
327 if (!$file = $fs->get_file($context->id, $component, $filearea, 0, $filepath, $filename) or $file->is_directory()) {
328 send_file_not_found();
331 session_get_instance()->write_close(); // unlock session during fileserving
332 send_stored_file($file, 0, 0, true); // must force download - security!
334 } else if ($filearea === 'profile' and $context->contextlevel == CONTEXT_USER) {
336 if ($CFG->forcelogin) {
337 require_login();
340 $userid = $context->instanceid;
342 if ($USER->id == $userid) {
343 // always can access own
345 } else if (!empty($CFG->forceloginforprofiles)) {
346 require_login();
348 if (isguestuser()) {
349 send_file_not_found();
352 // we allow access to site profile of all course contacts (usually teachers)
353 if (!has_coursecontact_role($userid) && !has_capability('moodle/user:viewdetails', $context)) {
354 send_file_not_found();
357 $canview = false;
358 if (has_capability('moodle/user:viewdetails', $context)) {
359 $canview = true;
360 } else {
361 $courses = enrol_get_my_courses();
364 while (!$canview && count($courses) > 0) {
365 $course = array_shift($courses);
366 if (has_capability('moodle/user:viewdetails', get_context_instance(CONTEXT_COURSE, $course->id))) {
367 $canview = true;
372 $filename = array_pop($args);
373 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
374 if (!$file = $fs->get_file($context->id, $component, $filearea, 0, $filepath, $filename) or $file->is_directory()) {
375 send_file_not_found();
378 session_get_instance()->write_close(); // unlock session during fileserving
379 send_stored_file($file, 0, 0, true); // must force download - security!
381 } else if ($filearea === 'profile' and $context->contextlevel == CONTEXT_COURSE) {
382 $userid = (int)array_shift($args);
383 $usercontext = get_context_instance(CONTEXT_USER, $userid);
385 if ($CFG->forcelogin) {
386 require_login();
389 if (!empty($CFG->forceloginforprofiles)) {
390 require_login();
391 if (isguestuser()) {
392 print_error('noguest');
395 //TODO: review this logic of user profile access prevention
396 if (!has_coursecontact_role($userid) and !has_capability('moodle/user:viewdetails', $usercontext)) {
397 print_error('usernotavailable');
399 if (!has_capability('moodle/user:viewdetails', $context) && !has_capability('moodle/user:viewdetails', $usercontext)) {
400 print_error('cannotviewprofile');
402 if (!is_enrolled($context, $userid)) {
403 print_error('notenrolledprofile');
405 if (groups_get_course_groupmode($course) == SEPARATEGROUPS and !has_capability('moodle/site:accessallgroups', $context)) {
406 print_error('groupnotamember');
410 $filename = array_pop($args);
411 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
412 if (!$file = $fs->get_file($usercontext->id, 'user', 'profile', 0, $filepath, $filename) or $file->is_directory()) {
413 send_file_not_found();
416 session_get_instance()->write_close(); // unlock session during fileserving
417 send_stored_file($file, 0, 0, true); // must force download - security!
419 } else if ($filearea === 'backup' and $context->contextlevel == CONTEXT_USER) {
420 require_login();
422 if (isguestuser()) {
423 send_file_not_found();
425 $userid = $context->instanceid;
427 if ($USER->id != $userid) {
428 send_file_not_found();
431 $filename = array_pop($args);
432 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
433 if (!$file = $fs->get_file($context->id, 'user', 'backup', 0, $filepath, $filename) or $file->is_directory()) {
434 send_file_not_found();
437 session_get_instance()->write_close(); // unlock session during fileserving
438 send_stored_file($file, 0, 0, true); // must force download - security!
440 } else {
441 send_file_not_found();
444 // ========================================================================================================================
445 } else if ($component === 'coursecat') {
446 if ($context->contextlevel != CONTEXT_COURSECAT) {
447 send_file_not_found();
450 if ($filearea === 'description') {
451 if ($CFG->forcelogin) {
452 // no login necessary - unless login forced everywhere
453 require_login();
456 $filename = array_pop($args);
457 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
458 if (!$file = $fs->get_file($context->id, 'coursecat', 'description', 0, $filepath, $filename) or $file->is_directory()) {
459 send_file_not_found();
462 session_get_instance()->write_close(); // unlock session during fileserving
463 send_stored_file($file, 60*60, 0, $forcedownload);
464 } else {
465 send_file_not_found();
468 // ========================================================================================================================
469 } else if ($component === 'course') {
470 if ($context->contextlevel != CONTEXT_COURSE) {
471 send_file_not_found();
474 if ($filearea === 'summary') {
475 if ($CFG->forcelogin) {
476 require_login();
479 $filename = array_pop($args);
480 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
481 if (!$file = $fs->get_file($context->id, 'course', 'summary', 0, $filepath, $filename) or $file->is_directory()) {
482 send_file_not_found();
485 session_get_instance()->write_close(); // unlock session during fileserving
486 send_stored_file($file, 60*60, 0, $forcedownload);
488 } else if ($filearea === 'section') {
489 if ($CFG->forcelogin) {
490 require_login($course);
491 } else if ($course->id != SITEID) {
492 require_login($course);
495 $sectionid = (int)array_shift($args);
497 if (!$section = $DB->get_record('course_sections', array('id'=>$sectionid, 'course'=>$course->id))) {
498 send_file_not_found();
501 if ($course->numsections < $section->section) {
502 if (!has_capability('moodle/course:update', $context)) {
503 // block access to unavailable sections if can not edit course
504 send_file_not_found();
508 $filename = array_pop($args);
509 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
510 if (!$file = $fs->get_file($context->id, 'course', 'section', $sectionid, $filepath, $filename) or $file->is_directory()) {
511 send_file_not_found();
514 session_get_instance()->write_close(); // unlock session during fileserving
515 send_stored_file($file, 60*60, 0, $forcedownload);
517 } else {
518 send_file_not_found();
521 } else if ($component === 'group') {
522 if ($context->contextlevel != CONTEXT_COURSE) {
523 send_file_not_found();
526 require_course_login($course, true, null, false);
528 $groupid = (int)array_shift($args);
530 $group = $DB->get_record('groups', array('id'=>$groupid, 'courseid'=>$course->id), '*', MUST_EXIST);
531 if (($course->groupmodeforce and $course->groupmode == SEPARATEGROUPS) and !has_capability('moodle/site:accessallgroups', $context) and !groups_is_member($group->id, $USER->id)) {
532 // do not allow access to separate group info if not member or teacher
533 send_file_not_found();
536 if ($filearea === 'description') {
538 require_login($course);
540 $filename = array_pop($args);
541 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
542 if (!$file = $fs->get_file($context->id, 'group', 'description', $group->id, $filepath, $filename) or $file->is_directory()) {
543 send_file_not_found();
546 session_get_instance()->write_close(); // unlock session during fileserving
547 send_stored_file($file, 60*60, 0, $forcedownload);
549 } else if ($filearea === 'icon') {
550 $filename = array_pop($args);
552 if ($filename !== 'f1' and $filename !== 'f2') {
553 send_file_not_found();
555 if (!$file = $fs->get_file($context->id, 'group', 'icon', $group->id, '/', $filename.'.png')) {
556 if (!$file = $fs->get_file($context->id, 'group', 'icon', $group->id, '/', $filename.'.jpg')) {
557 send_file_not_found();
561 session_get_instance()->write_close(); // unlock session during fileserving
562 send_stored_file($file, 60*60);
564 } else {
565 send_file_not_found();
568 } else if ($component === 'grouping') {
569 if ($context->contextlevel != CONTEXT_COURSE) {
570 send_file_not_found();
573 require_login($course);
575 $groupingid = (int)array_shift($args);
577 // note: everybody has access to grouping desc images for now
578 if ($filearea === 'description') {
580 $filename = array_pop($args);
581 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
582 if (!$file = $fs->get_file($context->id, 'grouping', 'description', $groupingid, $filepath, $filename) or $file->is_directory()) {
583 send_file_not_found();
586 session_get_instance()->write_close(); // unlock session during fileserving
587 send_stored_file($file, 60*60, 0, $forcedownload);
589 } else {
590 send_file_not_found();
593 // ========================================================================================================================
594 } else if ($component === 'backup') {
595 if ($filearea === 'course' and $context->contextlevel == CONTEXT_COURSE) {
596 require_login($course);
597 require_capability('moodle/backup:downloadfile', $context);
599 $filename = array_pop($args);
600 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
601 if (!$file = $fs->get_file($context->id, 'backup', 'course', 0, $filepath, $filename) or $file->is_directory()) {
602 send_file_not_found();
605 session_get_instance()->write_close(); // unlock session during fileserving
606 send_stored_file($file, 0, 0, $forcedownload);
608 } else if ($filearea === 'section' and $context->contextlevel == CONTEXT_COURSE) {
609 require_login($course);
610 require_capability('moodle/backup:downloadfile', $context);
612 $sectionid = (int)array_shift($args);
614 $filename = array_pop($args);
615 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
616 if (!$file = $fs->get_file($context->id, 'backup', 'section', $sectionid, $filepath, $filename) or $file->is_directory()) {
617 send_file_not_found();
620 session_get_instance()->write_close();
621 send_stored_file($file, 60*60, 0, $forcedownload);
623 } else if ($filearea === 'activity' and $context->contextlevel == CONTEXT_MODULE) {
624 require_login($course, false, $cm);
625 require_capability('moodle/backup:downloadfile', $context);
627 $filename = array_pop($args);
628 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
629 if (!$file = $fs->get_file($context->id, 'backup', 'activity', 0, $filepath, $filename) or $file->is_directory()) {
630 send_file_not_found();
633 session_get_instance()->write_close();
634 send_stored_file($file, 60*60, 0, $forcedownload);
636 } else if ($filearea === 'automated' and $context->contextlevel == CONTEXT_COURSE) {
637 // Backup files that were generated by the automated backup systems.
639 require_login($course);
640 require_capability('moodle/site:config', $context);
642 $filename = array_pop($args);
643 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
644 if (!$file = $fs->get_file($context->id, 'backup', 'automated', 0, $filepath, $filename) or $file->is_directory()) {
645 send_file_not_found();
648 session_get_instance()->write_close(); // unlock session during fileserving
649 send_stored_file($file, 0, 0, $forcedownload);
651 } else {
652 send_file_not_found();
655 // ========================================================================================================================
656 } else if ($component === 'question') {
657 require_once($CFG->libdir . '/questionlib.php');
658 question_pluginfile($course, $context, 'question', $filearea, $args, $forcedownload);
659 send_file_not_found();
661 // ========================================================================================================================
662 } else if (strpos($component, 'mod_') === 0) {
663 $modname = substr($component, 4);
664 if (!file_exists("$CFG->dirroot/mod/$modname/lib.php")) {
665 send_file_not_found();
667 require_once("$CFG->dirroot/mod/$modname/lib.php");
669 if ($context->contextlevel == CONTEXT_MODULE) {
670 if ($cm->modname !== $modname) {
671 // somebody tries to gain illegal access, cm type must match the component!
672 send_file_not_found();
676 if ($filearea === 'intro') {
677 if (!plugin_supports('mod', $modname, FEATURE_MOD_INTRO, true)) {
678 send_file_not_found();
680 require_course_login($course, true, $cm);
682 // all users may access it
683 $filename = array_pop($args);
684 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
685 if (!$file = $fs->get_file($context->id, 'mod_'.$modname, 'intro', 0, $filepath, $filename) or $file->is_directory()) {
686 send_file_not_found();
689 $lifetime = isset($CFG->filelifetime) ? $CFG->filelifetime : 86400;
691 // finally send the file
692 send_stored_file($file, $lifetime, 0);
695 $filefunction = $component.'_pluginfile';
696 $filefunctionold = $modname.'_pluginfile';
697 if (function_exists($filefunction)) {
698 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
699 $filefunction($course, $cm, $context, $filearea, $args, $forcedownload);
700 } else if (function_exists($filefunctionold)) {
701 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
702 $filefunctionold($course, $cm, $context, $filearea, $args, $forcedownload);
705 send_file_not_found();
707 // ========================================================================================================================
708 } else if (strpos($component, 'block_') === 0) {
709 $blockname = substr($component, 6);
710 // note: no more class methods in blocks please, that is ....
711 if (!file_exists("$CFG->dirroot/blocks/$blockname/lib.php")) {
712 send_file_not_found();
714 require_once("$CFG->dirroot/blocks/$blockname/lib.php");
716 if ($context->contextlevel == CONTEXT_BLOCK) {
717 $birecord = $DB->get_record('block_instances', array('id'=>$context->instanceid), '*',MUST_EXIST);
718 if ($birecord->blockname !== $blockname) {
719 // somebody tries to gain illegal access, cm type must match the component!
720 send_file_not_found();
722 } else {
723 $birecord = null;
726 $filefunction = $component.'_pluginfile';
727 if (function_exists($filefunction)) {
728 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
729 $filefunction($course, $birecord, $context, $filearea, $args, $forcedownload);
732 send_file_not_found();
734 } else if (strpos($component, '_') === false) {
735 // all core subsystems have to be specified above, no more guessing here!
736 send_file_not_found();
738 } else {
739 // try to serve general plugin file in arbitrary context
740 $dir = get_component_directory($component);
741 if (!file_exists("$dir/lib.php")) {
742 send_file_not_found();
744 include_once("$dir/lib.php");
746 $filefunction = $component.'_pluginfile';
747 if (function_exists($filefunction)) {
748 // if the function exists, it must send the file and terminate. Whatever it returns leads to "not found"
749 $filefunction($course, $cm, $context, $filearea, $args, $forcedownload);
752 send_file_not_found();