2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
18 * Functions for file handling.
21 * @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
25 defined('MOODLE_INTERNAL') || die();
28 * BYTESERVING_BOUNDARY - string unique string constant.
30 define('BYTESERVING_BOUNDARY', 's1k2o3d4a5k6s7');
32 require_once("$CFG->libdir/filestorage/file_exceptions.php");
33 require_once("$CFG->libdir/filestorage/file_storage.php");
34 require_once("$CFG->libdir/filestorage/zip_packer.php");
35 require_once("$CFG->libdir/filebrowser/file_browser.php");
38 * Encodes file serving url
40 * @deprecated use moodle_url factory methods instead
42 * @todo MDL-31071 deprecate this function
43 * @global stdClass $CFG
44 * @param string $urlbase
45 * @param string $path /filearea/itemid/dir/dir/file.exe
46 * @param bool $forcedownload
47 * @param bool $https https url required
48 * @return string encoded file url
50 function file_encode_url($urlbase, $path, $forcedownload=false, $https=false) {
53 //TODO: deprecate this
55 if ($CFG->slasharguments) {
56 $parts = explode('/', $path);
57 $parts = array_map('rawurlencode', $parts);
58 $path = implode('/', $parts);
59 $return = $urlbase.$path;
61 $return .= '?forcedownload=1';
64 $path = rawurlencode($path);
65 $return = $urlbase.'?file='.$path;
67 $return .= '&forcedownload=1';
72 $return = str_replace('http://', 'https://', $return);
79 * Prepares 'editor' formslib element from data in database
81 * The passed $data record must contain field foobar, foobarformat and optionally foobartrust. This
82 * function then copies the embedded files into draft area (assigning itemids automatically),
83 * creates the form element foobar_editor and rewrites the URLs so the embedded images can be
85 * In your mform definition, you must have an 'editor' element called foobar_editor. Then you call
86 * your mform's set_data() supplying the object returned by this function.
89 * @param stdClass $data database field that holds the html text with embedded media
90 * @param string $field the name of the database field that holds the html text with embedded media
91 * @param array $options editor options (like maxifiles, maxbytes etc.)
92 * @param stdClass $context context of the editor
93 * @param string $component
94 * @param string $filearea file area name
95 * @param int $itemid item id, required if item exists
96 * @return stdClass modified data object
98 function file_prepare_standard_editor($data, $field, array $options, $context=null, $component=null, $filearea=null, $itemid=null) {
99 $options = (array)$options;
100 if (!isset($options['trusttext'])) {
101 $options['trusttext'] = false;
103 if (!isset($options['forcehttps'])) {
104 $options['forcehttps'] = false;
106 if (!isset($options['subdirs'])) {
107 $options['subdirs'] = false;
109 if (!isset($options['maxfiles'])) {
110 $options['maxfiles'] = 0; // no files by default
112 if (!isset($options['noclean'])) {
113 $options['noclean'] = false;
116 //sanity check for passed context. This function doesn't expect $option['context'] to be set
117 //But this function is called before creating editor hence, this is one of the best places to check
118 //if context is used properly. This check notify developer that they missed passing context to editor.
119 if (isset($context) && !isset($options['context'])) {
120 //if $context is not null then make sure $option['context'] is also set.
121 debugging('Context for editor is not set in editoroptions. Hence editor will not respect editor filters', DEBUG_DEVELOPER);
122 } else if (isset($options['context']) && isset($context)) {
123 //If both are passed then they should be equal.
124 if ($options['context']->id != $context->id) {
125 $exceptionmsg = 'Editor context ['.$options['context']->id.'] is not equal to passed context ['.$context->id.']';
126 throw new coding_exception($exceptionmsg);
130 if (is_null($itemid) or is_null($context)) {
134 $data = new stdClass();
136 if (!isset($data->{$field})) {
137 $data->{$field} = '';
139 if (!isset($data->{$field.'format'})) {
140 $data->{$field.'format'} = editors_get_preferred_format();
142 if (!$options['noclean']) {
143 $data->{$field} = clean_text($data->{$field}, $data->{$field.'format'});
147 if ($options['trusttext']) {
148 // noclean ignored if trusttext enabled
149 if (!isset($data->{$field.'trust'})) {
150 $data->{$field.'trust'} = 0;
152 $data = trusttext_pre_edit($data, $field, $context);
154 if (!$options['noclean']) {
155 $data->{$field} = clean_text($data->{$field}, $data->{$field.'format'});
158 $contextid = $context->id;
161 if ($options['maxfiles'] != 0) {
162 $draftid_editor = file_get_submitted_draft_itemid($field);
163 $currenttext = file_prepare_draft_area($draftid_editor, $contextid, $component, $filearea, $itemid, $options, $data->{$field});
164 $data->{$field.'_editor'} = array('text'=>$currenttext, 'format'=>$data->{$field.'format'}, 'itemid'=>$draftid_editor);
166 $data->{$field.'_editor'} = array('text'=>$data->{$field}, 'format'=>$data->{$field.'format'}, 'itemid'=>0);
173 * Prepares the content of the 'editor' form element with embedded media files to be saved in database
175 * This function moves files from draft area to the destination area and
176 * encodes URLs to the draft files so they can be safely saved into DB. The
177 * form has to contain the 'editor' element named foobar_editor, where 'foobar'
178 * is the name of the database field to hold the wysiwyg editor content. The
179 * editor data comes as an array with text, format and itemid properties. This
180 * function automatically adds $data properties foobar, foobarformat and
181 * foobartrust, where foobar has URL to embedded files encoded.
184 * @param stdClass $data raw data submitted by the form
185 * @param string $field name of the database field containing the html with embedded media files
186 * @param array $options editor options (trusttext, subdirs, maxfiles, maxbytes etc.)
187 * @param stdClass $context context, required for existing data
188 * @param string $component file component
189 * @param string $filearea file area name
190 * @param int $itemid item id, required if item exists
191 * @return stdClass modified data object
193 function file_postupdate_standard_editor($data, $field, array $options, $context, $component=null, $filearea=null, $itemid=null) {
194 $options = (array)$options;
195 if (!isset($options['trusttext'])) {
196 $options['trusttext'] = false;
198 if (!isset($options['forcehttps'])) {
199 $options['forcehttps'] = false;
201 if (!isset($options['subdirs'])) {
202 $options['subdirs'] = false;
204 if (!isset($options['maxfiles'])) {
205 $options['maxfiles'] = 0; // no files by default
207 if (!isset($options['maxbytes'])) {
208 $options['maxbytes'] = 0; // unlimited
211 if ($options['trusttext']) {
212 $data->{$field.'trust'} = trusttext_trusted($context);
214 $data->{$field.'trust'} = 0;
217 $editor = $data->{$field.'_editor'};
219 if ($options['maxfiles'] == 0 or is_null($filearea) or is_null($itemid) or empty($editor['itemid'])) {
220 $data->{$field} = $editor['text'];
222 $data->{$field} = file_save_draft_area_files($editor['itemid'], $context->id, $component, $filearea, $itemid, $options, $editor['text'], $options['forcehttps']);
224 $data->{$field.'format'} = $editor['format'];
230 * Saves text and files modified by Editor formslib element
233 * @param stdClass $data $database entry field
234 * @param string $field name of data field
235 * @param array $options various options
236 * @param stdClass $context context - must already exist
237 * @param string $component
238 * @param string $filearea file area name
239 * @param int $itemid must already exist, usually means data is in db
240 * @return stdClass modified data obejct
242 function file_prepare_standard_filemanager($data, $field, array $options, $context=null, $component=null, $filearea=null, $itemid=null) {
243 $options = (array)$options;
244 if (!isset($options['subdirs'])) {
245 $options['subdirs'] = false;
247 if (is_null($itemid) or is_null($context)) {
251 $contextid = $context->id;
254 $draftid_editor = file_get_submitted_draft_itemid($field.'_filemanager');
255 file_prepare_draft_area($draftid_editor, $contextid, $component, $filearea, $itemid, $options);
256 $data->{$field.'_filemanager'} = $draftid_editor;
262 * Saves files modified by File manager formslib element
264 * @todo MDL-31073 review this function
266 * @param stdClass $data $database entry field
267 * @param string $field name of data field
268 * @param array $options various options
269 * @param stdClass $context context - must already exist
270 * @param string $component
271 * @param string $filearea file area name
272 * @param int $itemid must already exist, usually means data is in db
273 * @return stdClass modified data obejct
275 function file_postupdate_standard_filemanager($data, $field, array $options, $context, $component, $filearea, $itemid) {
276 $options = (array)$options;
277 if (!isset($options['subdirs'])) {
278 $options['subdirs'] = false;
280 if (!isset($options['maxfiles'])) {
281 $options['maxfiles'] = -1; // unlimited
283 if (!isset($options['maxbytes'])) {
284 $options['maxbytes'] = 0; // unlimited
287 if (empty($data->{$field.'_filemanager'})) {
291 file_save_draft_area_files($data->{$field.'_filemanager'}, $context->id, $component, $filearea, $itemid, $options);
292 $fs = get_file_storage();
294 if ($fs->get_area_files($context->id, $component, $filearea, $itemid)) {
295 $data->$field = '1'; // TODO: this is an ugly hack (skodak)
305 * Generate a draft itemid
308 * @global moodle_database $DB
309 * @global stdClass $USER
310 * @return int a random but available draft itemid that can be used to create a new draft
313 function file_get_unused_draft_itemid() {
316 if (isguestuser() or !isloggedin()) {
317 // guests and not-logged-in users can not be allowed to upload anything!!!!!!
318 print_error('noguest');
321 $contextid = get_context_instance(CONTEXT_USER, $USER->id)->id;
323 $fs = get_file_storage();
324 $draftitemid = rand(1, 999999999);
325 while ($files = $fs->get_area_files($contextid, 'user', 'draft', $draftitemid)) {
326 $draftitemid = rand(1, 999999999);
333 * Initialise a draft file area from a real one by copying the files. A draft
334 * area will be created if one does not already exist. Normally you should
335 * get $draftitemid by calling file_get_submitted_draft_itemid('elementname');
338 * @global stdClass $CFG
339 * @global stdClass $USER
340 * @param int $draftitemid the id of the draft area to use, or 0 to create a new one, in which case this parameter is updated.
341 * @param int $contextid This parameter and the next two identify the file area to copy files from.
342 * @param string $component
343 * @param string $filearea helps indentify the file area.
344 * @param int $itemid helps identify the file area. Can be null if there are no files yet.
345 * @param array $options text and file options ('subdirs'=>false, 'forcehttps'=>false)
346 * @param string $text some html content that needs to have embedded links rewritten to point to the draft area.
347 * @return string|null returns string if $text was passed in, the rewritten $text is returned. Otherwise NULL.
349 function file_prepare_draft_area(&$draftitemid, $contextid, $component, $filearea, $itemid, array $options=null, $text=null) {
350 global $CFG, $USER, $CFG;
352 $options = (array)$options;
353 if (!isset($options['subdirs'])) {
354 $options['subdirs'] = false;
356 if (!isset($options['forcehttps'])) {
357 $options['forcehttps'] = false;
360 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
361 $fs = get_file_storage();
363 if (empty($draftitemid)) {
364 // create a new area and copy existing files into
365 $draftitemid = file_get_unused_draft_itemid();
366 $file_record = array('contextid'=>$usercontext->id, 'component'=>'user', 'filearea'=>'draft', 'itemid'=>$draftitemid);
367 if (!is_null($itemid) and $files = $fs->get_area_files($contextid, $component, $filearea, $itemid)) {
368 foreach ($files as $file) {
369 if ($file->is_directory() and $file->get_filepath() === '/') {
370 // we need a way to mark the age of each draft area,
371 // by not copying the root dir we force it to be created automatically with current timestamp
374 if (!$options['subdirs'] and ($file->is_directory() or $file->get_filepath() !== '/')) {
377 $fs->create_file_from_storedfile($file_record, $file);
380 if (!is_null($text)) {
381 // at this point there should not be any draftfile links yet,
382 // because this is a new text from database that should still contain the @@pluginfile@@ links
383 // this happens when developers forget to post process the text
384 $text = str_replace("\"$CFG->httpswwwroot/draftfile.php", "\"$CFG->httpswwwroot/brokenfile.php#", $text);
390 if (is_null($text)) {
394 // relink embedded files - editor can not handle @@PLUGINFILE@@ !
395 return file_rewrite_pluginfile_urls($text, 'draftfile.php', $usercontext->id, 'user', 'draft', $draftitemid, $options);
399 * Convert encoded URLs in $text from the @@PLUGINFILE@@/... form to an actual URL.
402 * @global stdClass $CFG
403 * @param string $text The content that may contain ULRs in need of rewriting.
404 * @param string $file The script that should be used to serve these files. pluginfile.php, draftfile.php, etc.
405 * @param int $contextid This parameter and the next two identify the file area to use.
406 * @param string $component
407 * @param string $filearea helps identify the file area.
408 * @param int $itemid helps identify the file area.
409 * @param array $options text and file options ('forcehttps'=>false)
410 * @return string the processed text.
412 function file_rewrite_pluginfile_urls($text, $file, $contextid, $component, $filearea, $itemid, array $options=null) {
415 $options = (array)$options;
416 if (!isset($options['forcehttps'])) {
417 $options['forcehttps'] = false;
420 if (!$CFG->slasharguments) {
421 $file = $file . '?file=';
424 $baseurl = "$CFG->wwwroot/$file/$contextid/$component/$filearea/";
426 if ($itemid !== null) {
427 $baseurl .= "$itemid/";
430 if ($options['forcehttps']) {
431 $baseurl = str_replace('http://', 'https://', $baseurl);
434 return str_replace('@@PLUGINFILE@@/', $baseurl, $text);
438 * Returns information about files in a draft area.
440 * @global stdClass $CFG
441 * @global stdClass $USER
442 * @param int $draftitemid the draft area item id.
443 * @return array with the following entries:
444 * 'filecount' => number of files in the draft area.
445 * (more information will be added as needed).
447 function file_get_draft_area_info($draftitemid) {
450 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
451 $fs = get_file_storage();
455 // The number of files
456 $draftfiles = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id', false);
457 $results['filecount'] = count($draftfiles);
458 $results['filesize'] = 0;
459 foreach ($draftfiles as $file) {
460 $results['filesize'] += $file->get_filesize();
467 * Get used space of files
468 * @global moodle_database $DB
469 * @global stdClass $USER
470 * @return int total bytes
472 function file_get_user_used_space() {
475 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
476 $sql = "SELECT SUM(files1.filesize) AS totalbytes FROM {files} files1
477 JOIN (SELECT contenthash, filename, MAX(id) AS id
479 WHERE contextid = ? AND component = ? AND filearea != ?
480 GROUP BY contenthash, filename) files2 ON files1.id = files2.id";
481 $params = array('contextid'=>$usercontext->id, 'component'=>'user', 'filearea'=>'draft');
482 $record = $DB->get_record_sql($sql, $params);
483 return (int)$record->totalbytes;
487 * Convert any string to a valid filepath
488 * @todo review this function
490 * @return string path
492 function file_correct_filepath($str) { //TODO: what is this? (skodak)
493 if ($str == '/' or empty($str)) {
496 return '/'.trim($str, './@#$ ').'/';
501 * Generate a folder tree of draft area of current USER recursively
503 * @todo MDL-31073 use normal return value instead, this does not fit the rest of api here (skodak)
504 * @param int $draftitemid
505 * @param string $filepath
508 function file_get_drafarea_folders($draftitemid, $filepath, &$data) {
509 global $USER, $OUTPUT, $CFG;
510 $data->children = array();
511 $context = get_context_instance(CONTEXT_USER, $USER->id);
512 $fs = get_file_storage();
513 if ($files = $fs->get_directory_files($context->id, 'user', 'draft', $draftitemid, $filepath, false)) {
514 foreach ($files as $file) {
515 if ($file->is_directory()) {
516 $item = new stdClass();
517 $item->sortorder = $file->get_sortorder();
518 $item->filepath = $file->get_filepath();
520 $foldername = explode('/', trim($item->filepath, '/'));
521 $item->fullname = trim(array_pop($foldername), '/');
523 $item->id = uniqid();
524 file_get_drafarea_folders($draftitemid, $item->filepath, $item);
525 $data->children[] = $item;
534 * Listing all files (including folders) in current path (draft area)
535 * used by file manager
536 * @param int $draftitemid
537 * @param string $filepath
540 function file_get_drafarea_files($draftitemid, $filepath = '/') {
541 global $USER, $OUTPUT, $CFG;
543 $context = get_context_instance(CONTEXT_USER, $USER->id);
544 $fs = get_file_storage();
546 $data = new stdClass();
547 $data->path = array();
548 $data->path[] = array('name'=>get_string('files'), 'path'=>'/');
550 // will be used to build breadcrumb
552 if ($filepath !== '/') {
553 $filepath = file_correct_filepath($filepath);
554 $parts = explode('/', $filepath);
555 foreach ($parts as $part) {
556 if ($part != '' && $part != null) {
557 $trail .= ('/'.$part.'/');
558 $data->path[] = array('name'=>$part, 'path'=>$trail);
565 if ($files = $fs->get_directory_files($context->id, 'user', 'draft', $draftitemid, $filepath, false)) {
566 foreach ($files as $file) {
567 $item = new stdClass();
568 $item->filename = $file->get_filename();
569 $item->filepath = $file->get_filepath();
570 $item->fullname = trim($item->filename, '/');
571 $filesize = $file->get_filesize();
572 $item->filesize = $filesize ? display_size($filesize) : '';
574 $icon = mimeinfo_from_type('icon', $file->get_mimetype());
575 $item->icon = $OUTPUT->pix_url('f/' . $icon)->out();
576 $item->sortorder = $file->get_sortorder();
578 if ($icon == 'zip') {
581 $item->type = 'file';
584 if ($file->is_directory()) {
586 $item->icon = $OUTPUT->pix_url('f/folder')->out();
587 $item->type = 'folder';
588 $foldername = explode('/', trim($item->filepath, '/'));
589 $item->fullname = trim(array_pop($foldername), '/');
591 // do NOT use file browser here!
592 $item->url = moodle_url::make_draftfile_url($draftitemid, $item->filepath, $item->filename)->out();
597 $data->itemid = $draftitemid;
603 * Returns draft area itemid for a given element.
606 * @param string $elname name of formlib editor element, or a hidden form field that stores the draft area item id, etc.
607 * @return int the itemid, or 0 if there is not one yet.
609 function file_get_submitted_draft_itemid($elname) {
610 // this is a nasty hack, ideally all new elements should use arrays here or there should be a new parameter
611 if (!isset($_REQUEST[$elname])) {
614 if (is_array($_REQUEST[$elname])) {
615 $param = optional_param_array($elname, 0, PARAM_INT);
616 if (!empty($param['itemid'])) {
617 $param = $param['itemid'];
619 debugging('Missing itemid, maybe caused by unset maxfiles option', DEBUG_DEVELOPER);
624 $param = optional_param($elname, 0, PARAM_INT);
635 * Saves files from a draft file area to a real one (merging the list of files).
636 * Can rewrite URLs in some content at the same time if desired.
639 * @global stdClass $USER
640 * @param int $draftitemid the id of the draft area to use. Normally obtained
641 * from file_get_submitted_draft_itemid('elementname') or similar.
642 * @param int $contextid This parameter and the next two identify the file area to save to.
643 * @param string $component
644 * @param string $filearea indentifies the file area.
645 * @param int $itemid helps identifies the file area.
646 * @param array $options area options (subdirs=>false, maxfiles=-1, maxbytes=0)
647 * @param string $text some html content that needs to have embedded links rewritten
648 * to the @@PLUGINFILE@@ form for saving in the database.
649 * @param bool $forcehttps force https urls.
650 * @return string|null if $text was passed in, the rewritten $text is returned. Otherwise NULL.
652 function file_save_draft_area_files($draftitemid, $contextid, $component, $filearea, $itemid, array $options=null, $text=null, $forcehttps=false) {
655 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
656 $fs = get_file_storage();
658 $options = (array)$options;
659 if (!isset($options['subdirs'])) {
660 $options['subdirs'] = false;
662 if (!isset($options['maxfiles'])) {
663 $options['maxfiles'] = -1; // unlimited
665 if (!isset($options['maxbytes'])) {
666 $options['maxbytes'] = 0; // unlimited
669 $draftfiles = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id');
670 $oldfiles = $fs->get_area_files($contextid, $component, $filearea, $itemid, 'id');
672 if (count($draftfiles) < 2) {
673 // means there are no files - one file means root dir only ;-)
674 $fs->delete_area_files($contextid, $component, $filearea, $itemid);
676 } else if (count($oldfiles) < 2) {
678 // there were no files before - one file means root dir only ;-)
679 $file_record = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid);
680 foreach ($draftfiles as $file) {
681 if (!$options['subdirs']) {
682 if ($file->get_filepath() !== '/' or $file->is_directory()) {
686 if ($options['maxbytes'] and $options['maxbytes'] < $file->get_filesize()) {
687 // oversized file - should not get here at all
690 if ($options['maxfiles'] != -1 and $options['maxfiles'] <= $filecount) {
691 // more files - should not get here at all
694 if (!$file->is_directory()) {
697 $fs->create_file_from_storedfile($file_record, $file);
701 // we have to merge old and new files - we want to keep file ids for files that were not changed
702 // we change time modified for all new and changed files, we keep time created as is
703 $file_record = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'timemodified'=>time());
705 $newhashes = array();
706 foreach ($draftfiles as $file) {
707 $newhash = $fs->get_pathname_hash($contextid, $component, $filearea, $itemid, $file->get_filepath(), $file->get_filename());
708 $newhashes[$newhash] = $file;
711 foreach ($oldfiles as $oldfile) {
712 $oldhash = $oldfile->get_pathnamehash();
713 if (!isset($newhashes[$oldhash])) {
714 // delete files not needed any more - deleted by user
718 $newfile = $newhashes[$oldhash];
719 if ($oldfile->get_contenthash() != $newfile->get_contenthash() or $oldfile->get_sortorder() != $newfile->get_sortorder()
720 or $oldfile->get_status() != $newfile->get_status() or $oldfile->get_license() != $newfile->get_license()
721 or $oldfile->get_author() != $newfile->get_author() or $oldfile->get_source() != $newfile->get_source()) {
722 // file was changed, use updated with new timemodified data
726 // unchanged file or directory - we keep it as is
727 unset($newhashes[$oldhash]);
728 if (!$oldfile->is_directory()) {
733 // now add new/changed files
734 // the size and subdirectory tests are extra safety only, the UI should prevent it
735 foreach ($newhashes as $file) {
736 if (!$options['subdirs']) {
737 if ($file->get_filepath() !== '/' or $file->is_directory()) {
741 if ($options['maxbytes'] and $options['maxbytes'] < $file->get_filesize()) {
742 // oversized file - should not get here at all
745 if ($options['maxfiles'] != -1 and $options['maxfiles'] <= $filecount) {
746 // more files - should not get here at all
749 if (!$file->is_directory()) {
752 $fs->create_file_from_storedfile($file_record, $file);
756 // note: do not purge the draft area - we clean up areas later in cron,
757 // the reason is that user might press submit twice and they would loose the files,
758 // also sometimes we might want to use hacks that save files into two different areas
760 if (is_null($text)) {
763 return file_rewrite_urls_to_pluginfile($text, $draftitemid, $forcehttps);
768 * Convert the draft file area URLs in some content to @@PLUGINFILE@@ tokens
769 * ready to be saved in the database. Normally, this is done automatically by
770 * {@link file_save_draft_area_files()}.
773 * @param string $text the content to process.
774 * @param int $draftitemid the draft file area the content was using.
775 * @param bool $forcehttps whether the content contains https URLs. Default false.
776 * @return string the processed content.
778 function file_rewrite_urls_to_pluginfile($text, $draftitemid, $forcehttps = false) {
781 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
783 $wwwroot = $CFG->wwwroot;
785 $wwwroot = str_replace('http://', 'https://', $wwwroot);
788 // relink embedded files if text submitted - no absolute links allowed in database!
789 $text = str_ireplace("$wwwroot/draftfile.php/$usercontext->id/user/draft/$draftitemid/", '@@PLUGINFILE@@/', $text);
791 if (strpos($text, 'draftfile.php?file=') !== false) {
793 preg_match_all("!$wwwroot/draftfile.php\?file=%2F{$usercontext->id}%2Fuser%2Fdraft%2F{$draftitemid}%2F[^'\",&<>|`\s:\\\\]+!iu", $text, $matches);
795 foreach ($matches[0] as $match) {
796 $replace = str_ireplace('%2F', '/', $match);
797 $text = str_replace($match, $replace, $text);
800 $text = str_ireplace("$wwwroot/draftfile.php?file=/$usercontext->id/user/draft/$draftitemid/", '@@PLUGINFILE@@/', $text);
807 * Set file sort order
809 * @global moodle_database $DB
810 * @param int $contextid the context id
811 * @param string $component file component
812 * @param string $filearea file area.
813 * @param int $itemid itemid.
814 * @param string $filepath file path.
815 * @param string $filename file name.
816 * @param int $sortorder the sort order of file.
819 function file_set_sortorder($contextid, $component, $filearea, $itemid, $filepath, $filename, $sortorder) {
821 $conditions = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>$filepath, 'filename'=>$filename);
822 if ($file_record = $DB->get_record('files', $conditions)) {
823 $sortorder = (int)$sortorder;
824 $file_record->sortorder = $sortorder;
825 $DB->update_record('files', $file_record);
832 * reset file sort order number to 0
833 * @global moodle_database $DB
834 * @param int $contextid the context id
835 * @param string $component
836 * @param string $filearea file area.
837 * @param int|bool $itemid itemid.
840 function file_reset_sortorder($contextid, $component, $filearea, $itemid=false) {
843 $conditions = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea);
844 if ($itemid !== false) {
845 $conditions['itemid'] = $itemid;
848 $file_records = $DB->get_records('files', $conditions);
849 foreach ($file_records as $file_record) {
850 $file_record->sortorder = 0;
851 $DB->update_record('files', $file_record);
857 * Returns description of upload error
859 * @param int $errorcode found in $_FILES['filename.ext']['error']
860 * @return string error description string, '' if ok
862 function file_get_upload_error($errorcode) {
864 switch ($errorcode) {
865 case 0: // UPLOAD_ERR_OK - no error
869 case 1: // UPLOAD_ERR_INI_SIZE
870 $errmessage = get_string('uploadserverlimit');
873 case 2: // UPLOAD_ERR_FORM_SIZE
874 $errmessage = get_string('uploadformlimit');
877 case 3: // UPLOAD_ERR_PARTIAL
878 $errmessage = get_string('uploadpartialfile');
881 case 4: // UPLOAD_ERR_NO_FILE
882 $errmessage = get_string('uploadnofilefound');
885 // Note: there is no error with a value of 5
887 case 6: // UPLOAD_ERR_NO_TMP_DIR
888 $errmessage = get_string('uploadnotempdir');
891 case 7: // UPLOAD_ERR_CANT_WRITE
892 $errmessage = get_string('uploadcantwrite');
895 case 8: // UPLOAD_ERR_EXTENSION
896 $errmessage = get_string('uploadextension');
900 $errmessage = get_string('uploadproblem');
907 * Recursive function formating an array in POST parameter
908 * @param array $arraydata - the array that we are going to format and add into &$data array
909 * @param string $currentdata - a row of the final postdata array at instant T
910 * when finish, it's assign to $data under this format: name[keyname][][]...[]='value'
911 * @param array $data - the final data array containing all POST parameters : 1 row = 1 parameter
913 function format_array_postdata_for_curlcall($arraydata, $currentdata, &$data) {
914 foreach ($arraydata as $k=>$v) {
915 $newcurrentdata = $currentdata;
916 if (is_array($v)) { //the value is an array, call the function recursively
917 $newcurrentdata = $newcurrentdata.'['.urlencode($k).']';
918 format_array_postdata_for_curlcall($v, $newcurrentdata, $data);
919 } else { //add the POST parameter to the $data array
920 $data[] = $newcurrentdata.'['.urlencode($k).']='.urlencode($v);
926 * Transform a PHP array into POST parameter
927 * (see the recursive function format_array_postdata_for_curlcall)
928 * @param array $postdata
929 * @return array containing all POST parameters (1 row = 1 POST parameter)
931 function format_postdata_for_curlcall($postdata) {
933 foreach ($postdata as $k=>$v) {
935 $currentdata = urlencode($k);
936 format_array_postdata_for_curlcall($v, $currentdata, $data);
938 $data[] = urlencode($k).'='.urlencode($v);
941 $convertedpostdata = implode('&', $data);
942 return $convertedpostdata;
946 * Fetches content of file from Internet (using proxy if defined). Uses cURL extension if present.
947 * Due to security concerns only downloads from http(s) sources are supported.
949 * @todo MDL-31073 add version test for '7.10.5'
951 * @param string $url file url starting with http(s)://
952 * @param array $headers http headers, null if none. If set, should be an
953 * associative array of header name => value pairs.
954 * @param array $postdata array means use POST request with given parameters
955 * @param bool $fullresponse return headers, responses, etc in a similar way snoopy does
956 * (if false, just returns content)
957 * @param int $timeout timeout for complete download process including all file transfer
958 * (default 5 minutes)
959 * @param int $connecttimeout timeout for connection to server; this is the timeout that
960 * usually happens if the remote server is completely down (default 20 seconds);
961 * may not work when using proxy
962 * @param bool $skipcertverify If true, the peer's SSL certificate will not be checked.
963 * Only use this when already in a trusted location.
964 * @param string $tofile store the downloaded content to file instead of returning it.
965 * @param bool $calctimeout false by default, true enables an extra head request to try and determine
966 * filesize and appropriately larger timeout based on $CFG->curltimeoutkbitrate
967 * @return mixed false if request failed or content of the file as string if ok. True if file downloaded into $tofile successfully.
969 function download_file_content($url, $headers=null, $postdata=null, $fullresponse=false, $timeout=300, $connecttimeout=20, $skipcertverify=false, $tofile=NULL, $calctimeout=false) {
972 // some extra security
973 $newlines = array("\r", "\n");
974 if (is_array($headers) ) {
975 foreach ($headers as $key => $value) {
976 $headers[$key] = str_replace($newlines, '', $value);
979 $url = str_replace($newlines, '', $url);
980 if (!preg_match('|^https?://|i', $url)) {
982 $response = new stdClass();
983 $response->status = 0;
984 $response->headers = array();
985 $response->response_code = 'Invalid protocol specified in url';
986 $response->results = '';
987 $response->error = 'Invalid protocol specified in url';
994 // check if proxy (if used) should be bypassed for this url
995 $proxybypass = is_proxybypass($url);
997 if (!$ch = curl_init($url)) {
998 debugging('Can not init curl.');
1002 // set extra headers
1003 if (is_array($headers) ) {
1004 $headers2 = array();
1005 foreach ($headers as $key => $value) {
1006 $headers2[] = "$key: $value";
1008 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers2);
1011 if ($skipcertverify) {
1012 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
1015 // use POST if requested
1016 if (is_array($postdata)) {
1017 $postdata = format_postdata_for_curlcall($postdata);
1018 curl_setopt($ch, CURLOPT_POST, true);
1019 curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
1022 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
1023 curl_setopt($ch, CURLOPT_HEADER, false);
1024 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connecttimeout);
1026 if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
1027 // TODO: add version test for '7.10.5'
1028 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
1029 curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
1032 if (!empty($CFG->proxyhost) and !$proxybypass) {
1033 // SOCKS supported in PHP5 only
1034 if (!empty($CFG->proxytype) and ($CFG->proxytype == 'SOCKS5')) {
1035 if (defined('CURLPROXY_SOCKS5')) {
1036 curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
1039 if ($fullresponse) {
1040 $response = new stdClass();
1041 $response->status = '0';
1042 $response->headers = array();
1043 $response->response_code = 'SOCKS5 proxy is not supported in PHP4';
1044 $response->results = '';
1045 $response->error = 'SOCKS5 proxy is not supported in PHP4';
1048 debugging("SOCKS5 proxy is not supported in PHP4.", DEBUG_ALL);
1054 curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, false);
1056 if (empty($CFG->proxyport)) {
1057 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost);
1059 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport);
1062 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
1063 curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword);
1064 if (defined('CURLOPT_PROXYAUTH')) {
1065 // any proxy authentication if PHP 5.1
1066 curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
1071 // set up header and content handlers
1072 $received = new stdClass();
1073 $received->headers = array(); // received headers array
1074 $received->tofile = $tofile;
1075 $received->fh = null;
1076 curl_setopt($ch, CURLOPT_HEADERFUNCTION, partial('download_file_content_header_handler', $received));
1078 curl_setopt($ch, CURLOPT_WRITEFUNCTION, partial('download_file_content_write_handler', $received));
1081 if (!isset($CFG->curltimeoutkbitrate)) {
1082 //use very slow rate of 56kbps as a timeout speed when not set
1085 $bitrate = $CFG->curltimeoutkbitrate;
1088 // try to calculate the proper amount for timeout from remote file size.
1089 // if disabled or zero, we won't do any checks nor head requests.
1090 if ($calctimeout && $bitrate > 0) {
1091 //setup header request only options
1092 curl_setopt_array ($ch, array(
1093 CURLOPT_RETURNTRANSFER => false,
1094 CURLOPT_NOBODY => true)
1098 $info = curl_getinfo($ch);
1099 $err = curl_error($ch);
1101 if ($err === '' && $info['download_content_length'] > 0) { //no curl errors
1102 $timeout = max($timeout, ceil($info['download_content_length'] * 8 / ($bitrate * 1024))); //adjust for large files only - take max timeout.
1104 //reinstate affected curl options
1105 curl_setopt_array ($ch, array(
1106 CURLOPT_RETURNTRANSFER => true,
1107 CURLOPT_NOBODY => false)
1111 curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
1112 $result = curl_exec($ch);
1114 // try to detect encoding problems
1115 if ((curl_errno($ch) == 23 or curl_errno($ch) == 61) and defined('CURLOPT_ENCODING')) {
1116 curl_setopt($ch, CURLOPT_ENCODING, 'none');
1117 $result = curl_exec($ch);
1120 if ($received->fh) {
1121 fclose($received->fh);
1124 if (curl_errno($ch)) {
1125 $error = curl_error($ch);
1126 $error_no = curl_errno($ch);
1129 if ($fullresponse) {
1130 $response = new stdClass();
1131 if ($error_no == 28) {
1132 $response->status = '-100'; // mimic snoopy
1134 $response->status = '0';
1136 $response->headers = array();
1137 $response->response_code = $error;
1138 $response->results = false;
1139 $response->error = $error;
1142 debugging("cURL request for \"$url\" failed with: $error ($error_no)", DEBUG_ALL);
1147 $info = curl_getinfo($ch);
1150 if (empty($info['http_code'])) {
1151 // for security reasons we support only true http connections (Location: file:// exploit prevention)
1152 $response = new stdClass();
1153 $response->status = '0';
1154 $response->headers = array();
1155 $response->response_code = 'Unknown cURL error';
1156 $response->results = false; // do NOT change this, we really want to ignore the result!
1157 $response->error = 'Unknown cURL error';
1160 $response = new stdClass();;
1161 $response->status = (string)$info['http_code'];
1162 $response->headers = $received->headers;
1163 $response->response_code = $received->headers[0];
1164 $response->results = $result;
1165 $response->error = '';
1168 if ($fullresponse) {
1170 } else if ($info['http_code'] != 200) {
1171 debugging("cURL request for \"$url\" failed, HTTP response code: ".$response->response_code, DEBUG_ALL);
1174 return $response->results;
1180 * internal implementation
1181 * @param stdClass $received
1182 * @param resource $ch
1183 * @param mixed $header
1184 * @return int header length
1186 function download_file_content_header_handler($received, $ch, $header) {
1187 $received->headers[] = $header;
1188 return strlen($header);
1192 * internal implementation
1193 * @param stdClass $received
1194 * @param resource $ch
1195 * @param mixed $data
1197 function download_file_content_write_handler($received, $ch, $data) {
1198 if (!$received->fh) {
1199 $received->fh = fopen($received->tofile, 'w');
1200 if ($received->fh === false) {
1201 // bad luck, file creation or overriding failed
1205 if (fwrite($received->fh, $data) === false) {
1206 // bad luck, write failed, let's abort completely
1209 return strlen($data);
1213 * Returns a list of information about file t ypes based on extensions
1216 * @return array List of information about file types based on extensions.
1217 * Associative array of extension (lower-case) to associative array
1218 * from 'element name' to data. Current element names are 'type' and 'icon'.
1219 * Unknown types should use the 'xxx' entry which includes defaults.
1221 function get_mimetypes_array() {
1222 static $mimearray = array (
1223 'xxx' => array ('type'=>'document/unknown', 'icon'=>'unknown'),
1224 '3gp' => array ('type'=>'video/quicktime', 'icon'=>'video'),
1225 'aac' => array ('type'=>'audio/aac', 'icon'=>'audio'),
1226 'ai' => array ('type'=>'application/postscript', 'icon'=>'image'),
1227 'aif' => array ('type'=>'audio/x-aiff', 'icon'=>'audio'),
1228 'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio'),
1229 'aifc' => array ('type'=>'audio/x-aiff', 'icon'=>'audio'),
1230 'applescript' => array ('type'=>'text/plain', 'icon'=>'text'),
1231 'asc' => array ('type'=>'text/plain', 'icon'=>'text'),
1232 'asm' => array ('type'=>'text/plain', 'icon'=>'text'),
1233 'au' => array ('type'=>'audio/au', 'icon'=>'audio'),
1234 'avi' => array ('type'=>'video/x-ms-wm', 'icon'=>'avi'),
1235 'bmp' => array ('type'=>'image/bmp', 'icon'=>'image'),
1236 'c' => array ('type'=>'text/plain', 'icon'=>'text'),
1237 'cct' => array ('type'=>'shockwave/director', 'icon'=>'flash'),
1238 'cpp' => array ('type'=>'text/plain', 'icon'=>'text'),
1239 'cs' => array ('type'=>'application/x-csh', 'icon'=>'text'),
1240 'css' => array ('type'=>'text/css', 'icon'=>'text'),
1241 'csv' => array ('type'=>'text/csv', 'icon'=>'excel'),
1242 'dv' => array ('type'=>'video/x-dv', 'icon'=>'video'),
1243 'dmg' => array ('type'=>'application/octet-stream', 'icon'=>'dmg'),
1245 'doc' => array ('type'=>'application/msword', 'icon'=>'word'),
1246 'docx' => array ('type'=>'application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'icon'=>'docx'),
1247 'docm' => array ('type'=>'application/vnd.ms-word.document.macroEnabled.12', 'icon'=>'docm'),
1248 'dotx' => array ('type'=>'application/vnd.openxmlformats-officedocument.wordprocessingml.template', 'icon'=>'dotx'),
1249 'dotm' => array ('type'=>'application/vnd.ms-word.template.macroEnabled.12', 'icon'=>'dotm'),
1251 'dcr' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1252 'dif' => array ('type'=>'video/x-dv', 'icon'=>'video'),
1253 'dir' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1254 'dxr' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1255 'eps' => array ('type'=>'application/postscript', 'icon'=>'pdf'),
1256 'fdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1257 'flv' => array ('type'=>'video/x-flv', 'icon'=>'video'),
1258 'f4v' => array ('type'=>'video/mp4', 'icon'=>'video'),
1259 'gif' => array ('type'=>'image/gif', 'icon'=>'image'),
1260 'gtar' => array ('type'=>'application/x-gtar', 'icon'=>'zip'),
1261 'tgz' => array ('type'=>'application/g-zip', 'icon'=>'zip'),
1262 'gz' => array ('type'=>'application/g-zip', 'icon'=>'zip'),
1263 'gzip' => array ('type'=>'application/g-zip', 'icon'=>'zip'),
1264 'h' => array ('type'=>'text/plain', 'icon'=>'text'),
1265 'hpp' => array ('type'=>'text/plain', 'icon'=>'text'),
1266 'hqx' => array ('type'=>'application/mac-binhex40', 'icon'=>'zip'),
1267 'htc' => array ('type'=>'text/x-component', 'icon'=>'text'),
1268 'html' => array ('type'=>'text/html', 'icon'=>'html'),
1269 'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'html'),
1270 'htm' => array ('type'=>'text/html', 'icon'=>'html'),
1271 'ico' => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image'),
1272 'ics' => array ('type'=>'text/calendar', 'icon'=>'text'),
1273 'isf' => array ('type'=>'application/inspiration', 'icon'=>'isf'),
1274 'ist' => array ('type'=>'application/inspiration.template', 'icon'=>'isf'),
1275 'java' => array ('type'=>'text/plain', 'icon'=>'text'),
1276 'jcb' => array ('type'=>'text/xml', 'icon'=>'jcb'),
1277 'jcl' => array ('type'=>'text/xml', 'icon'=>'jcl'),
1278 'jcw' => array ('type'=>'text/xml', 'icon'=>'jcw'),
1279 'jmt' => array ('type'=>'text/xml', 'icon'=>'jmt'),
1280 'jmx' => array ('type'=>'text/xml', 'icon'=>'jmx'),
1281 'jpe' => array ('type'=>'image/jpeg', 'icon'=>'image'),
1282 'jpeg' => array ('type'=>'image/jpeg', 'icon'=>'image'),
1283 'jpg' => array ('type'=>'image/jpeg', 'icon'=>'image'),
1284 'jqz' => array ('type'=>'text/xml', 'icon'=>'jqz'),
1285 'js' => array ('type'=>'application/x-javascript', 'icon'=>'text'),
1286 'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text'),
1287 'm' => array ('type'=>'text/plain', 'icon'=>'text'),
1288 'mbz' => array ('type'=>'application/vnd.moodle.backup', 'icon'=>'moodle'),
1289 'mov' => array ('type'=>'video/quicktime', 'icon'=>'video'),
1290 'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'video'),
1291 'm3u' => array ('type'=>'audio/x-mpegurl', 'icon'=>'audio'),
1292 'mp3' => array ('type'=>'audio/mp3', 'icon'=>'audio'),
1293 'mp4' => array ('type'=>'video/mp4', 'icon'=>'video'),
1294 'm4v' => array ('type'=>'video/mp4', 'icon'=>'video'),
1295 'm4a' => array ('type'=>'audio/mp4', 'icon'=>'audio'),
1296 'mpeg' => array ('type'=>'video/mpeg', 'icon'=>'video'),
1297 'mpe' => array ('type'=>'video/mpeg', 'icon'=>'video'),
1298 'mpg' => array ('type'=>'video/mpeg', 'icon'=>'video'),
1300 'odt' => array ('type'=>'application/vnd.oasis.opendocument.text', 'icon'=>'odt'),
1301 'ott' => array ('type'=>'application/vnd.oasis.opendocument.text-template', 'icon'=>'odt'),
1302 'oth' => array ('type'=>'application/vnd.oasis.opendocument.text-web', 'icon'=>'odt'),
1303 'odm' => array ('type'=>'application/vnd.oasis.opendocument.text-master', 'icon'=>'odm'),
1304 'odg' => array ('type'=>'application/vnd.oasis.opendocument.graphics', 'icon'=>'odg'),
1305 'otg' => array ('type'=>'application/vnd.oasis.opendocument.graphics-template', 'icon'=>'odg'),
1306 'odp' => array ('type'=>'application/vnd.oasis.opendocument.presentation', 'icon'=>'odp'),
1307 'otp' => array ('type'=>'application/vnd.oasis.opendocument.presentation-template', 'icon'=>'odp'),
1308 'ods' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet', 'icon'=>'ods'),
1309 'ots' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet-template', 'icon'=>'ods'),
1310 'odc' => array ('type'=>'application/vnd.oasis.opendocument.chart', 'icon'=>'odc'),
1311 'odf' => array ('type'=>'application/vnd.oasis.opendocument.formula', 'icon'=>'odf'),
1312 'odb' => array ('type'=>'application/vnd.oasis.opendocument.database', 'icon'=>'odb'),
1313 'odi' => array ('type'=>'application/vnd.oasis.opendocument.image', 'icon'=>'odi'),
1314 'oga' => array ('type'=>'audio/ogg', 'icon'=>'audio'),
1315 'ogg' => array ('type'=>'audio/ogg', 'icon'=>'audio'),
1316 'ogv' => array ('type'=>'video/ogg', 'icon'=>'video'),
1318 'pct' => array ('type'=>'image/pict', 'icon'=>'image'),
1319 'pdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1320 'php' => array ('type'=>'text/plain', 'icon'=>'text'),
1321 'pic' => array ('type'=>'image/pict', 'icon'=>'image'),
1322 'pict' => array ('type'=>'image/pict', 'icon'=>'image'),
1323 'png' => array ('type'=>'image/png', 'icon'=>'image'),
1325 'pps' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint'),
1326 'ppt' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint'),
1327 'pptx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.presentation', 'icon'=>'pptx'),
1328 'pptm' => array ('type'=>'application/vnd.ms-powerpoint.presentation.macroEnabled.12', 'icon'=>'pptm'),
1329 'potx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.template', 'icon'=>'potx'),
1330 'potm' => array ('type'=>'application/vnd.ms-powerpoint.template.macroEnabled.12', 'icon'=>'potm'),
1331 'ppam' => array ('type'=>'application/vnd.ms-powerpoint.addin.macroEnabled.12', 'icon'=>'ppam'),
1332 'ppsx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.slideshow', 'icon'=>'ppsx'),
1333 'ppsm' => array ('type'=>'application/vnd.ms-powerpoint.slideshow.macroEnabled.12', 'icon'=>'ppsm'),
1335 'ps' => array ('type'=>'application/postscript', 'icon'=>'pdf'),
1336 'qt' => array ('type'=>'video/quicktime', 'icon'=>'video'),
1337 'ra' => array ('type'=>'audio/x-realaudio-plugin', 'icon'=>'audio'),
1338 'ram' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'audio'),
1339 'rhb' => array ('type'=>'text/xml', 'icon'=>'xml'),
1340 'rm' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'audio'),
1341 'rmvb' => array ('type'=>'application/vnd.rn-realmedia-vbr', 'icon'=>'video'),
1342 'rtf' => array ('type'=>'text/rtf', 'icon'=>'text'),
1343 'rtx' => array ('type'=>'text/richtext', 'icon'=>'text'),
1344 'rv' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'video'),
1345 'sh' => array ('type'=>'application/x-sh', 'icon'=>'text'),
1346 'sit' => array ('type'=>'application/x-stuffit', 'icon'=>'zip'),
1347 'smi' => array ('type'=>'application/smil', 'icon'=>'text'),
1348 'smil' => array ('type'=>'application/smil', 'icon'=>'text'),
1349 'sqt' => array ('type'=>'text/xml', 'icon'=>'xml'),
1350 'svg' => array ('type'=>'image/svg+xml', 'icon'=>'image'),
1351 'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image'),
1352 'swa' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1353 'swf' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash'),
1354 'swfl' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash'),
1356 'sxw' => array ('type'=>'application/vnd.sun.xml.writer', 'icon'=>'odt'),
1357 'stw' => array ('type'=>'application/vnd.sun.xml.writer.template', 'icon'=>'odt'),
1358 'sxc' => array ('type'=>'application/vnd.sun.xml.calc', 'icon'=>'odt'),
1359 'stc' => array ('type'=>'application/vnd.sun.xml.calc.template', 'icon'=>'odt'),
1360 'sxd' => array ('type'=>'application/vnd.sun.xml.draw', 'icon'=>'odt'),
1361 'std' => array ('type'=>'application/vnd.sun.xml.draw.template', 'icon'=>'odt'),
1362 'sxi' => array ('type'=>'application/vnd.sun.xml.impress', 'icon'=>'odt'),
1363 'sti' => array ('type'=>'application/vnd.sun.xml.impress.template', 'icon'=>'odt'),
1364 'sxg' => array ('type'=>'application/vnd.sun.xml.writer.global', 'icon'=>'odt'),
1365 'sxm' => array ('type'=>'application/vnd.sun.xml.math', 'icon'=>'odt'),
1367 'tar' => array ('type'=>'application/x-tar', 'icon'=>'zip'),
1368 'tif' => array ('type'=>'image/tiff', 'icon'=>'image'),
1369 'tiff' => array ('type'=>'image/tiff', 'icon'=>'image'),
1370 'tex' => array ('type'=>'application/x-tex', 'icon'=>'text'),
1371 'texi' => array ('type'=>'application/x-texinfo', 'icon'=>'text'),
1372 'texinfo' => array ('type'=>'application/x-texinfo', 'icon'=>'text'),
1373 'tsv' => array ('type'=>'text/tab-separated-values', 'icon'=>'text'),
1374 'txt' => array ('type'=>'text/plain', 'icon'=>'text'),
1375 'wav' => array ('type'=>'audio/wav', 'icon'=>'audio'),
1376 'webm' => array ('type'=>'video/webm', 'icon'=>'video'),
1377 'wmv' => array ('type'=>'video/x-ms-wmv', 'icon'=>'avi'),
1378 'asf' => array ('type'=>'video/x-ms-asf', 'icon'=>'avi'),
1379 'xdp' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1380 'xfd' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1381 'xfdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1383 'xls' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'excel'),
1384 'xlsx' => array ('type'=>'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'icon'=>'xlsx'),
1385 'xlsm' => array ('type'=>'application/vnd.ms-excel.sheet.macroEnabled.12', 'icon'=>'xlsm'),
1386 'xltx' => array ('type'=>'application/vnd.openxmlformats-officedocument.spreadsheetml.template', 'icon'=>'xltx'),
1387 'xltm' => array ('type'=>'application/vnd.ms-excel.template.macroEnabled.12', 'icon'=>'xltm'),
1388 'xlsb' => array ('type'=>'application/vnd.ms-excel.sheet.binary.macroEnabled.12', 'icon'=>'xlsb'),
1389 'xlam' => array ('type'=>'application/vnd.ms-excel.addin.macroEnabled.12', 'icon'=>'xlam'),
1391 'xml' => array ('type'=>'application/xml', 'icon'=>'xml'),
1392 'xsl' => array ('type'=>'text/xml', 'icon'=>'xml'),
1393 'zip' => array ('type'=>'application/zip', 'icon'=>'zip')
1399 * Obtains information about a filetype based on its extension. Will
1400 * use a default if no information is present about that particular
1404 * @param string $element Desired information (usually 'icon'
1405 * for icon filename or 'type' for MIME type)
1406 * @param string $filename Filename we're looking up
1407 * @return string Requested piece of information from array
1409 function mimeinfo($element, $filename) {
1411 $mimeinfo = get_mimetypes_array();
1413 if (preg_match('/\.([a-z0-9]+)$/i', $filename, $match)) {
1414 if (isset($mimeinfo[strtolower($match[1])][$element])) {
1415 return $mimeinfo[strtolower($match[1])][$element];
1417 if ($element == 'icon32') {
1418 if (isset($mimeinfo[strtolower($match[1])]['icon'])) {
1419 $filename = $mimeinfo[strtolower($match[1])]['icon'];
1421 $filename = 'unknown';
1424 if (file_exists($CFG->dirroot.'/pix/f/'.$filename.'.png') or file_exists($CFG->dirroot.'/pix/f/'.$filename.'.gif')) {
1427 return 'unknown-32';
1430 return $mimeinfo['xxx'][$element]; // By default
1434 if ($element == 'icon32') {
1435 return 'unknown-32';
1437 return $mimeinfo['xxx'][$element]; // By default
1442 * Obtains information about a filetype based on the MIME type rather than
1443 * the other way around.
1446 * @param string $element Desired information (usually 'icon')
1447 * @param string $mimetype MIME type we're looking up
1448 * @return string Requested piece of information from array
1450 function mimeinfo_from_type($element, $mimetype) {
1451 $mimeinfo = get_mimetypes_array();
1453 foreach($mimeinfo as $values) {
1454 if ($values['type']==$mimetype) {
1455 if (isset($values[$element])) {
1456 return $values[$element];
1461 return $mimeinfo['xxx'][$element]; // Default
1465 * Get information about a filetype based on the icon file.
1468 * @param string $element Desired information (usually 'icon')
1469 * @param string $icon Icon file name without extension
1470 * @param bool $all return all matching entries (defaults to false - best (by ext)/last match)
1471 * @return string Requested piece of information from array
1473 function mimeinfo_from_icon($element, $icon, $all=false) {
1474 $mimeinfo = get_mimetypes_array();
1476 if (preg_match("/\/(.*)/", $icon, $matches)) {
1477 $icon = $matches[1];
1479 // Try to get the extension
1481 if (($cutat = strrpos($icon, '.')) !== false && $cutat < strlen($icon)-1) {
1482 $extension = substr($icon, $cutat + 1);
1484 $info = array($mimeinfo['xxx'][$element]); // Default
1485 foreach($mimeinfo as $key => $values) {
1486 if ($values['icon']==$icon) {
1487 if (isset($values[$element])) {
1488 $info[$key] = $values[$element];
1490 //No break, for example for 'excel' we don't want 'csv'!
1494 if (count($info) > 1) {
1495 array_shift($info); // take off document/unknown if we have better options
1497 return array_values($info); // Keep keys out when requesting all
1500 // Requested only one, try to get the best by extension coincidence, else return the last
1501 if ($extension && isset($info[$extension])) {
1502 return $info[$extension];
1505 return array_pop($info); // Return last match (mimicking behaviour/comment inside foreach loop)
1509 * Returns the relative icon path for a given mime type
1511 * This function should be used in conjunction with $OUTPUT->pix_url to produce
1512 * a return the full path to an icon.
1515 * $mimetype = 'image/jpg';
1516 * $icon = $OUTPUT->pix_url(file_mimetype_icon($mimetype));
1517 * echo '<img src="'.$icon.'" alt="'.$mimetype.'" />';
1521 * @todo MDL-31074 When an $OUTPUT->icon method is available this function should be altered
1522 * to conform with that.
1523 * @param string $mimetype The mimetype to fetch an icon for
1524 * @param int $size The size of the icon. Not yet implemented
1525 * @return string The relative path to the icon
1527 function file_mimetype_icon($mimetype, $size = NULL) {
1530 $icon = mimeinfo_from_type('icon', $mimetype);
1532 if (file_exists("$CFG->dirroot/pix/f/$icon-$size.png") or file_exists("$CFG->dirroot/pix/f/$icon-$size.gif")) {
1533 $icon = "$icon-$size";
1540 * Returns the relative icon path for a given file name
1542 * This function should be used in conjunction with $OUTPUT->pix_url to produce
1543 * a return the full path to an icon.
1546 * $filename = 'jpg';
1547 * $icon = $OUTPUT->pix_url(file_extension_icon($filename));
1548 * echo '<img src="'.$icon.'" alt="blah" />';
1551 * @todo MDL-31074 When an $OUTPUT->icon method is available this function should be altered
1552 * to conform with that.
1553 * @todo MDL-31074 Implement $size
1555 * @param string $filename The filename to get the icon for
1556 * @param int $size The size of the icon. Defaults to null can also be 32
1559 function file_extension_icon($filename, $size = NULL) {
1562 $icon = mimeinfo('icon', $filename);
1564 if (file_exists("$CFG->dirroot/pix/f/$icon-$size.png") or file_exists("$CFG->dirroot/pix/f/$icon-$size.gif")) {
1565 $icon = "$icon-$size";
1572 * Obtains descriptions for file types (e.g. 'Microsoft Word document') from the
1573 * mimetypes.php language file.
1575 * @param string $mimetype MIME type (can be obtained using the mimeinfo function)
1576 * @param bool $capitalise If true, capitalises first character of result
1577 * @return string Text description
1579 function get_mimetype_description($mimetype, $capitalise=false) {
1580 if (get_string_manager()->string_exists($mimetype, 'mimetypes')) {
1581 $result = get_string($mimetype, 'mimetypes');
1583 $result = get_string('document/unknown','mimetypes');
1586 $result=ucfirst($result);
1592 * Requested file is not found or not accessible, does not return, terminates script
1594 * @global stdClass $CFG
1595 * @global stdClass $COURSE
1597 function send_file_not_found() {
1598 global $CFG, $COURSE;
1600 print_error('filenotfound', 'error', $CFG->wwwroot.'/course/view.php?id='.$COURSE->id); //this is not displayed on IIS??
1603 * Helper function to send correct 404 for server.
1605 function send_header_404() {
1606 if (substr(php_sapi_name(), 0, 3) == 'cgi') {
1607 header("Status: 404 Not Found");
1609 header('HTTP/1.0 404 not found');
1614 * Check output buffering settings before sending file.
1615 * Please note you should not send any other headers after calling this function.
1617 * To be called only from lib/filelib.php !
1619 function prepare_file_content_sending() {
1620 // We needed to be able to send headers up until now
1621 if (headers_sent()) {
1622 throw new file_serving_exception('Headers already sent, can not serve file.');
1625 $olddebug = error_reporting(0);
1627 // IE compatibility HACK - it does not like zlib compression much
1628 // there is also a problem with the length header in older PHP versions
1629 if (ini_get_bool('zlib.output_compression')) {
1630 ini_set('zlib.output_compression', 'Off');
1633 // flush and close all buffers if possible
1634 while(ob_get_level()) {
1635 if (!ob_end_flush()) {
1636 // prevent infinite loop when buffer can not be closed
1641 error_reporting($olddebug);
1643 //NOTE: we can not reliable test headers_sent() here because
1644 // the headers might be sent which trying to close the buffers,
1645 // this happens especially if browser does not support gzip or deflate
1649 * Handles the sending of temporary file to user, download is forced.
1650 * File is deleted after abort or successful sending, does not return, script terminated
1652 * @param string $path path to file, preferably from moodledata/temp/something; or content of file itself
1653 * @param string $filename proposed file name when saving file
1654 * @param bool $pathisstring If the path is string
1656 function send_temp_file($path, $filename, $pathisstring=false) {
1659 // close session - not needed anymore
1660 @session_get_instance()->write_close();
1662 if (!$pathisstring) {
1663 if (!file_exists($path)) {
1665 print_error('filenotfound', 'error', $CFG->wwwroot.'/');
1667 // executed after normal finish or abort
1668 @register_shutdown_function('send_temp_file_finished', $path);
1671 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
1672 if (check_browser_version('MSIE')) {
1673 $filename = urlencode($filename);
1676 $filesize = $pathisstring ? strlen($path) : filesize($path);
1678 header('Content-Disposition: attachment; filename='.$filename);
1679 header('Content-Length: '.$filesize);
1680 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
1681 header('Cache-Control: max-age=10');
1682 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
1684 } else { //normal http - prevent caching at all cost
1685 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
1686 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
1687 header('Pragma: no-cache');
1689 header('Accept-Ranges: none'); // Do not allow byteserving
1691 //flush the buffers - save memory and disable sid rewrite
1692 // this also disables zlib compression
1693 prepare_file_content_sending();
1695 // send the contents
1696 if ($pathisstring) {
1702 die; //no more chars to output
1706 * Internal callback function used by send_temp_file()
1708 * @param string $path
1710 function send_temp_file_finished($path) {
1711 if (file_exists($path)) {
1717 * Handles the sending of file data to the user's browser, including support for
1721 * @global stdClass $CFG
1722 * @global stdClass $COURSE
1723 * @global moodle_session $SESSION
1724 * @param string $path Path of file on disk (including real filename), or actual content of file as string
1725 * @param string $filename Filename to send
1726 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
1727 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
1728 * @param bool $pathisstring If true (default false), $path is the content to send and not the pathname
1729 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
1730 * @param string $mimetype Include to specify the MIME type; leave blank to have it guess the type from $filename
1731 * @param bool $dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
1732 * if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
1733 * you must detect this case when control is returned using connection_aborted. Please not that session is closed
1734 * and should not be reopened.
1735 * @return null script execution stopped unless $dontdie is true
1737 function send_file($path, $filename, $lifetime = 'default' , $filter=0, $pathisstring=false, $forcedownload=false, $mimetype='', $dontdie=false) {
1738 global $CFG, $COURSE, $SESSION;
1741 ignore_user_abort(true);
1744 // MDL-11789, apply $CFG->filelifetime here
1745 if ($lifetime === 'default') {
1746 if (!empty($CFG->filelifetime)) {
1747 $lifetime = $CFG->filelifetime;
1753 session_get_instance()->write_close(); // unlock session during fileserving
1755 // Use given MIME type if specified, otherwise guess it using mimeinfo.
1756 // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
1757 // only Firefox saves all files locally before opening when content-disposition: attachment stated
1758 $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
1759 $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
1760 ($mimetype ? $mimetype : mimeinfo('type', $filename));
1762 $lastmodified = $pathisstring ? time() : filemtime($path);
1763 $filesize = $pathisstring ? strlen($path) : filesize($path);
1766 //Adobe Acrobat Reader XSS prevention
1767 if ($mimetype=='application/pdf' or mimeinfo('type', $filename)=='application/pdf') {
1768 //please note that it prevents opening of pdfs in browser when http referer disabled
1769 //or file linked from another site; browser caching of pdfs is now disabled too
1770 if (!empty($_SERVER['HTTP_RANGE'])) {
1771 //already byteserving
1772 $lifetime = 1; // >0 needed for byteserving
1773 } else if (empty($_SERVER['HTTP_REFERER']) or strpos($_SERVER['HTTP_REFERER'], $CFG->wwwroot)!==0) {
1774 $mimetype = 'application/x-forcedownload';
1775 $forcedownload = true;
1778 $lifetime = 1; // >0 needed for byteserving
1783 if ($lifetime > 0 && !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
1784 // get unixtime of request header; clip extra junk off first
1785 $since = strtotime(preg_replace('/;.*$/','',$_SERVER["HTTP_IF_MODIFIED_SINCE"]));
1786 if ($since && $since >= $lastmodified) {
1787 header('HTTP/1.1 304 Not Modified');
1788 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
1789 header('Cache-Control: max-age='.$lifetime);
1790 header('Content-Type: '.$mimetype);
1798 //do not put '@' before the next header to detect incorrect moodle configurations,
1799 //error should be better than "weird" empty lines for admins/users
1800 header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
1802 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
1803 if (check_browser_version('MSIE')) {
1804 $filename = rawurlencode($filename);
1807 if ($forcedownload) {
1808 header('Content-Disposition: attachment; filename="'.$filename.'"');
1810 header('Content-Disposition: inline; filename="'.$filename.'"');
1813 if ($lifetime > 0) {
1814 header('Cache-Control: max-age='.$lifetime);
1815 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
1818 if (empty($CFG->disablebyteserving) && !$pathisstring && $mimetype != 'text/plain' && $mimetype != 'text/html') {
1820 header('Accept-Ranges: bytes');
1822 if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) {
1823 // byteserving stuff - for acrobat reader and download accelerators
1824 // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
1825 // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
1827 if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
1828 foreach ($ranges as $key=>$value) {
1829 if ($ranges[$key][1] == '') {
1831 $ranges[$key][1] = $filesize - $ranges[$key][2];
1832 $ranges[$key][2] = $filesize - 1;
1833 } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
1835 $ranges[$key][2] = $filesize - 1;
1837 if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
1838 //invalid byte-range ==> ignore header
1842 //prepare multipart header
1843 $ranges[$key][0] = "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n";
1844 $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n";
1850 $handle = fopen($path, 'rb');
1851 byteserving_send_file($handle, $mimetype, $ranges, $filesize);
1855 /// Do not byteserve (disabled, strings, text and html files).
1856 header('Accept-Ranges: none');
1858 } else { // Do not cache files in proxies and browsers
1859 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
1860 header('Cache-Control: max-age=10');
1861 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
1863 } else { //normal http - prevent caching at all cost
1864 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
1865 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
1866 header('Pragma: no-cache');
1868 header('Accept-Ranges: none'); // Do not allow byteserving when caching disabled
1871 if (empty($filter)) {
1872 if ($mimetype == 'text/plain') {
1873 header('Content-Type: Text/plain; charset=utf-8'); //add encoding
1875 header('Content-Type: '.$mimetype);
1877 header('Content-Length: '.$filesize);
1879 //flush the buffers - save memory and disable sid rewrite
1880 //this also disables zlib compression
1881 prepare_file_content_sending();
1883 // send the contents
1884 if ($pathisstring) {
1890 } else { // Try to put the file through filters
1891 if ($mimetype == 'text/html') {
1892 $options = new stdClass();
1893 $options->noclean = true;
1894 $options->nocache = true; // temporary workaround for MDL-5136
1895 $text = $pathisstring ? $path : implode('', file($path));
1897 $text = file_modify_html_header($text);
1898 $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
1900 header('Content-Length: '.strlen($output));
1901 header('Content-Type: text/html');
1903 //flush the buffers - save memory and disable sid rewrite
1904 //this also disables zlib compression
1905 prepare_file_content_sending();
1907 // send the contents
1909 // only filter text if filter all files is selected
1910 } else if (($mimetype == 'text/plain') and ($filter == 1)) {
1911 $options = new stdClass();
1912 $options->newlines = false;
1913 $options->noclean = true;
1914 $text = htmlentities($pathisstring ? $path : implode('', file($path)));
1915 $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
1917 header('Content-Length: '.strlen($output));
1918 header('Content-Type: text/html; charset=utf-8'); //add encoding
1920 //flush the buffers - save memory and disable sid rewrite
1921 //this also disables zlib compression
1922 prepare_file_content_sending();
1924 // send the contents
1927 } else { // Just send it out raw
1928 header('Content-Length: '.$filesize);
1929 header('Content-Type: '.$mimetype);
1931 //flush the buffers - save memory and disable sid rewrite
1932 //this also disables zlib compression
1933 prepare_file_content_sending();
1935 // send the contents
1936 if ($pathisstring) {
1946 die; //no more chars to output!!!
1950 * Handles the sending of file data to the user's browser, including support for
1953 * The $options parameter supports the following keys:
1954 * (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
1955 * (string|null) filename - overrides the implicit filename
1956 * (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
1957 * if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
1958 * you must detect this case when control is returned using connection_aborted. Please not that session is closed
1959 * and should not be reopened.
1962 * @global stdClass $CFG
1963 * @global stdClass $COURSE
1964 * @global moodle_session $SESSION
1965 * @param stored_file $stored_file local file object
1966 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
1967 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
1968 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
1969 * @param array $options additional options affecting the file serving
1970 * @return null script execution stopped unless $options['dontdie'] is true
1972 function send_stored_file($stored_file, $lifetime=86400 , $filter=0, $forcedownload=false, array $options=array()) {
1973 global $CFG, $COURSE, $SESSION;
1975 if (empty($options['filename'])) {
1978 $filename = $options['filename'];
1981 if (empty($options['dontdie'])) {
1987 if (!$stored_file or $stored_file->is_directory()) {
1996 ignore_user_abort(true);
1999 session_get_instance()->write_close(); // unlock session during fileserving
2001 // Use given MIME type if specified, otherwise guess it using mimeinfo.
2002 // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
2003 // only Firefox saves all files locally before opening when content-disposition: attachment stated
2004 $filename = is_null($filename) ? $stored_file->get_filename() : $filename;
2005 $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
2006 $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
2007 ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
2009 $lastmodified = $stored_file->get_timemodified();
2010 $filesize = $stored_file->get_filesize();
2012 if ($lifetime > 0 && !empty($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
2013 // get unixtime of request header; clip extra junk off first
2014 $since = strtotime(preg_replace('/;.*$/','',$_SERVER["HTTP_IF_MODIFIED_SINCE"]));
2015 if ($since && $since >= $lastmodified) {
2016 header('HTTP/1.1 304 Not Modified');
2017 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
2018 header('Cache-Control: max-age='.$lifetime);
2019 header('Content-Type: '.$mimetype);
2027 //do not put '@' before the next header to detect incorrect moodle configurations,
2028 //error should be better than "weird" empty lines for admins/users
2029 header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
2031 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
2032 if (check_browser_version('MSIE')) {
2033 $filename = rawurlencode($filename);
2036 if ($forcedownload) {
2037 header('Content-Disposition: attachment; filename="'.$filename.'"');
2039 header('Content-Disposition: inline; filename="'.$filename.'"');
2042 if ($lifetime > 0) {
2043 header('Cache-Control: max-age='.$lifetime);
2044 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
2047 if (empty($CFG->disablebyteserving) && $mimetype != 'text/plain' && $mimetype != 'text/html') {
2049 header('Accept-Ranges: bytes');
2051 if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) {
2052 // byteserving stuff - for acrobat reader and download accelerators
2053 // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
2054 // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
2056 if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
2057 foreach ($ranges as $key=>$value) {
2058 if ($ranges[$key][1] == '') {
2060 $ranges[$key][1] = $filesize - $ranges[$key][2];
2061 $ranges[$key][2] = $filesize - 1;
2062 } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
2064 $ranges[$key][2] = $filesize - 1;
2066 if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
2067 //invalid byte-range ==> ignore header
2071 //prepare multipart header
2072 $ranges[$key][0] = "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n";
2073 $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n";
2079 byteserving_send_file($stored_file->get_content_file_handle(), $mimetype, $ranges, $filesize);
2083 /// Do not byteserve (disabled, strings, text and html files).
2084 header('Accept-Ranges: none');
2086 } else { // Do not cache files in proxies and browsers
2087 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
2088 header('Cache-Control: max-age=10');
2089 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2091 } else { //normal http - prevent caching at all cost
2092 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
2093 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2094 header('Pragma: no-cache');
2096 header('Accept-Ranges: none'); // Do not allow byteserving when caching disabled
2099 if (empty($filter)) {
2100 if ($mimetype == 'text/plain') {
2101 header('Content-Type: Text/plain; charset=utf-8'); //add encoding
2103 header('Content-Type: '.$mimetype);
2105 header('Content-Length: '.$filesize);
2107 //flush the buffers - save memory and disable sid rewrite
2108 //this also disables zlib compression
2109 prepare_file_content_sending();
2111 // send the contents
2112 $stored_file->readfile();
2114 } else { // Try to put the file through filters
2115 if ($mimetype == 'text/html') {
2116 $options = new stdClass();
2117 $options->noclean = true;
2118 $options->nocache = true; // temporary workaround for MDL-5136
2119 $text = $stored_file->get_content();
2120 $text = file_modify_html_header($text);
2121 $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
2123 header('Content-Length: '.strlen($output));
2124 header('Content-Type: text/html');
2126 //flush the buffers - save memory and disable sid rewrite
2127 //this also disables zlib compression
2128 prepare_file_content_sending();
2130 // send the contents
2133 } else if (($mimetype == 'text/plain') and ($filter == 1)) {
2134 // only filter text if filter all files is selected
2135 $options = new stdClass();
2136 $options->newlines = false;
2137 $options->noclean = true;
2138 $text = $stored_file->get_content();
2139 $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
2141 header('Content-Length: '.strlen($output));
2142 header('Content-Type: text/html; charset=utf-8'); //add encoding
2144 //flush the buffers - save memory and disable sid rewrite
2145 //this also disables zlib compression
2146 prepare_file_content_sending();
2148 // send the contents
2151 } else { // Just send it out raw
2152 header('Content-Length: '.$filesize);
2153 header('Content-Type: '.$mimetype);
2155 //flush the buffers - save memory and disable sid rewrite
2156 //this also disables zlib compression
2157 prepare_file_content_sending();
2159 // send the contents
2160 $stored_file->readfile();
2166 die; //no more chars to output!!!
2170 * Retrieves an array of records from a CSV file and places
2171 * them into a given table structure
2173 * @global stdClass $CFG
2174 * @global moodle_database $DB
2175 * @param string $file The path to a CSV file
2176 * @param string $table The table to retrieve columns from
2177 * @return bool|array Returns an array of CSV records or false
2179 function get_records_csv($file, $table) {
2182 if (!$metacolumns = $DB->get_columns($table)) {
2186 if(!($handle = @fopen($file, 'r'))) {
2187 print_error('get_records_csv failed to open '.$file);
2190 $fieldnames = fgetcsv($handle, 4096);
2191 if(empty($fieldnames)) {
2198 foreach($metacolumns as $metacolumn) {
2199 $ord = array_search($metacolumn->name, $fieldnames);
2201 $columns[$metacolumn->name] = $ord;
2207 while (($data = fgetcsv($handle, 4096)) !== false) {
2208 $item = new stdClass;
2209 foreach($columns as $name => $ord) {
2210 $item->$name = $data[$ord];
2220 * Create a file with CSV contents
2222 * @global stdClass $CFG
2223 * @global moodle_database $DB
2224 * @param string $file The file to put the CSV content into
2225 * @param array $records An array of records to write to a CSV file
2226 * @param string $table The table to get columns from
2227 * @return bool success
2229 function put_records_csv($file, $records, $table = NULL) {
2232 if (empty($records)) {
2236 $metacolumns = NULL;
2237 if ($table !== NULL && !$metacolumns = $DB->get_columns($table)) {
2243 if(!($fp = @fopen($CFG->tempdir.'/'.$file, 'w'))) {
2244 print_error('put_records_csv failed to open '.$file);
2247 $proto = reset($records);
2248 if(is_object($proto)) {
2249 $fields_records = array_keys(get_object_vars($proto));
2251 else if(is_array($proto)) {
2252 $fields_records = array_keys($proto);
2259 if(!empty($metacolumns)) {
2260 $fields_table = array_map(create_function('$a', 'return $a->name;'), $metacolumns);
2261 $fields = array_intersect($fields_records, $fields_table);
2264 $fields = $fields_records;
2267 fwrite($fp, implode(',', $fields));
2268 fwrite($fp, "\r\n");
2270 foreach($records as $record) {
2271 $array = (array)$record;
2273 foreach($fields as $field) {
2274 if(strpos($array[$field], ',')) {
2275 $values[] = '"'.str_replace('"', '\"', $array[$field]).'"';
2278 $values[] = $array[$field];
2281 fwrite($fp, implode(',', $values)."\r\n");
2290 * Recursively delete the file or folder with path $location. That is,
2291 * if it is a file delete it. If it is a folder, delete all its content
2292 * then delete it. If $location does not exist to start, that is not
2293 * considered an error.
2295 * @param string $location the path to remove.
2298 function fulldelete($location) {
2299 if (empty($location)) {
2300 // extra safety against wrong param
2303 if (is_dir($location)) {
2304 $currdir = opendir($location);
2305 while (false !== ($file = readdir($currdir))) {
2306 if ($file <> ".." && $file <> ".") {
2307 $fullfile = $location."/".$file;
2308 if (is_dir($fullfile)) {
2309 if (!fulldelete($fullfile)) {
2313 if (!unlink($fullfile)) {
2320 if (! rmdir($location)) {
2324 } else if (file_exists($location)) {
2325 if (!unlink($location)) {
2333 * Send requested byterange of file.
2335 * @param resource $handle A file handle
2336 * @param string $mimetype The mimetype for the output
2337 * @param array $ranges An array of ranges to send
2338 * @param string $filesize The size of the content if only one range is used
2339 * @todo MDL-31088 check if "multipart/x-byteranges" is more compatible with current readers/browsers/servers
2341 function byteserving_send_file($handle, $mimetype, $ranges, $filesize) {
2342 $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
2343 if ($handle === false) {
2346 if (count($ranges) == 1) { //only one range requested
2347 $length = $ranges[0][2] - $ranges[0][1] + 1;
2348 header('HTTP/1.1 206 Partial content');
2349 header('Content-Length: '.$length);
2350 header('Content-Range: bytes '.$ranges[0][1].'-'.$ranges[0][2].'/'.$filesize);
2351 header('Content-Type: '.$mimetype);
2353 //flush the buffers - save memory and disable sid rewrite
2354 //this also disables zlib compression
2355 prepare_file_content_sending();
2358 fseek($handle, $ranges[0][1]);
2359 while (!feof($handle) && $length > 0) {
2360 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
2361 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
2364 $length -= strlen($buffer);
2368 } else { // multiple ranges requested - not tested much
2370 foreach($ranges as $range) {
2371 $totallength += strlen($range[0]) + $range[2] - $range[1] + 1;
2373 $totallength += strlen("\r\n--".BYTESERVING_BOUNDARY."--\r\n");
2374 header('HTTP/1.1 206 Partial content');
2375 header('Content-Length: '.$totallength);
2376 header('Content-Type: multipart/byteranges; boundary='.BYTESERVING_BOUNDARY);
2377 //TODO: check if "multipart/x-byteranges" is more compatible with current readers/browsers/servers
2379 //flush the buffers - save memory and disable sid rewrite
2380 //this also disables zlib compression
2381 prepare_file_content_sending();
2383 foreach($ranges as $range) {
2384 $length = $range[2] - $range[1] + 1;
2387 fseek($handle, $range[1]);
2388 while (!feof($handle) && $length > 0) {
2389 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
2390 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
2393 $length -= strlen($buffer);
2396 echo "\r\n--".BYTESERVING_BOUNDARY."--\r\n";
2403 * add includes (js and css) into uploaded files
2404 * before returning them, useful for themes and utf.js includes
2406 * @global stdClass $CFG
2407 * @param string $text text to search and replace
2408 * @return string text with added head includes
2411 function file_modify_html_header($text) {
2412 // first look for <head> tag
2415 $stylesheetshtml = '';
2416 /* foreach ($CFG->stylesheets as $stylesheet) {
2418 $stylesheetshtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n";
2422 if (filter_is_enabled('filter/mediaplugin')) {
2423 // this script is needed by most media filter plugins.
2424 $attributes = array('type'=>'text/javascript', 'src'=>$CFG->httpswwwroot . '/lib/ufo.js');
2425 $ufo = html_writer::tag('script', '', $attributes) . "\n";
2428 preg_match('/\<head\>|\<HEAD\>/', $text, $matches);
2430 $replacement = '<head>'.$ufo.$stylesheetshtml;
2431 $text = preg_replace('/\<head\>|\<HEAD\>/', $replacement, $text, 1);
2435 // if not, look for <html> tag, and stick <head> right after
2436 preg_match('/\<html\>|\<HTML\>/', $text, $matches);
2438 // replace <html> tag with <html><head>includes</head>
2439 $replacement = '<html>'."\n".'<head>'.$ufo.$stylesheetshtml.'</head>';
2440 $text = preg_replace('/\<html\>|\<HTML\>/', $replacement, $text, 1);
2444 // if not, look for <body> tag, and stick <head> before body
2445 preg_match('/\<body\>|\<BODY\>/', $text, $matches);
2447 $replacement = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".'<body>';
2448 $text = preg_replace('/\<body\>|\<BODY\>/', $replacement, $text, 1);
2452 // if not, just stick a <head> tag at the beginning
2453 $text = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".$text;
2458 * RESTful cURL class
2460 * This is a wrapper class for curl, it is quite easy to use:
2464 * $c = new curl(array('cache'=>true));
2466 * $c = new curl(array('cookie'=>true));
2468 * $c = new curl(array('proxy'=>true));
2470 * // HTTP GET Method
2471 * $html = $c->get('http://example.com');
2472 * // HTTP POST Method
2473 * $html = $c->post('http://example.com/', array('q'=>'words', 'name'=>'moodle'));
2474 * // HTTP PUT Method
2475 * $html = $c->put('http://example.com/', array('file'=>'/var/www/test.txt');
2478 * @package core_files
2480 * @copyright Dongsheng Cai <dongsheng@moodle.com>
2481 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
2484 /** @var bool Caches http request contents */
2485 public $cache = false;
2486 /** @var bool Uses proxy */
2487 public $proxy = false;
2488 /** @var string library version */
2489 public $version = '0.4 dev';
2490 /** @var array http's response */
2491 public $response = array();
2492 /** @var array http header */
2493 public $header = array();
2494 /** @var string cURL information */
2496 /** @var string error */
2499 /** @var array cURL options */
2501 /** @var string Proxy host */
2502 private $proxy_host = '';
2503 /** @var string Proxy auth */
2504 private $proxy_auth = '';
2505 /** @var string Proxy type */
2506 private $proxy_type = '';
2507 /** @var bool Debug mode on */
2508 private $debug = false;
2509 /** @var bool|string Path to cookie file */
2510 private $cookie = false;
2515 * @global stdClass $CFG
2516 * @param array $options
2518 public function __construct($options = array()){
2520 if (!function_exists('curl_init')) {
2521 $this->error = 'cURL module must be enabled!';
2522 trigger_error($this->error, E_USER_ERROR);
2525 // the options of curl should be init here.
2527 if (!empty($options['debug'])) {
2528 $this->debug = true;
2530 if(!empty($options['cookie'])) {
2531 if($options['cookie'] === true) {
2532 $this->cookie = $CFG->dataroot.'/curl_cookie.txt';
2534 $this->cookie = $options['cookie'];
2537 if (!empty($options['cache'])) {
2538 if (class_exists('curl_cache')) {
2539 if (!empty($options['module_cache'])) {
2540 $this->cache = new curl_cache($options['module_cache']);
2542 $this->cache = new curl_cache('misc');
2546 if (!empty($CFG->proxyhost)) {
2547 if (empty($CFG->proxyport)) {
2548 $this->proxy_host = $CFG->proxyhost;
2550 $this->proxy_host = $CFG->proxyhost.':'.$CFG->proxyport;
2552 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
2553 $this->proxy_auth = $CFG->proxyuser.':'.$CFG->proxypassword;
2554 $this->setopt(array(
2555 'proxyauth'=> CURLAUTH_BASIC | CURLAUTH_NTLM,
2556 'proxyuserpwd'=>$this->proxy_auth));
2558 if (!empty($CFG->proxytype)) {
2559 if ($CFG->proxytype == 'SOCKS5') {
2560 $this->proxy_type = CURLPROXY_SOCKS5;
2562 $this->proxy_type = CURLPROXY_HTTP;
2563 $this->setopt(array('httpproxytunnel'=>false));
2565 $this->setopt(array('proxytype'=>$this->proxy_type));
2568 if (!empty($this->proxy_host)) {
2569 $this->proxy = array('proxy'=>$this->proxy_host);
2573 * Resets the CURL options that have already been set
2575 public function resetopt(){
2576 $this->options = array();
2577 $this->options['CURLOPT_USERAGENT'] = 'MoodleBot/1.0';
2578 // True to include the header in the output
2579 $this->options['CURLOPT_HEADER'] = 0;
2580 // True to Exclude the body from the output
2581 $this->options['CURLOPT_NOBODY'] = 0;
2582 // TRUE to follow any "Location: " header that the server
2583 // sends as part of the HTTP header (note this is recursive,
2584 // PHP will follow as many "Location: " headers that it is sent,
2585 // unless CURLOPT_MAXREDIRS is set).
2586 //$this->options['CURLOPT_FOLLOWLOCATION'] = 1;
2587 $this->options['CURLOPT_MAXREDIRS'] = 10;
2588 $this->options['CURLOPT_ENCODING'] = '';
2589 // TRUE to return the transfer as a string of the return
2590 // value of curl_exec() instead of outputting it out directly.
2591 $this->options['CURLOPT_RETURNTRANSFER'] = 1;
2592 $this->options['CURLOPT_BINARYTRANSFER'] = 0;
2593 $this->options['CURLOPT_SSL_VERIFYPEER'] = 0;
2594 $this->options['CURLOPT_SSL_VERIFYHOST'] = 2;
2595 $this->options['CURLOPT_CONNECTTIMEOUT'] = 30;
2601 public function resetcookie() {
2602 if (!empty($this->cookie)) {
2603 if (is_file($this->cookie)) {
2604 $fp = fopen($this->cookie, 'w');
2616 * @param array $options If array is null, this function will
2617 * reset the options to default value.
2619 public function setopt($options = array()) {
2620 if (is_array($options)) {
2621 foreach($options as $name => $val){
2622 if (stripos($name, 'CURLOPT_') === false) {
2623 $name = strtoupper('CURLOPT_'.$name);
2625 $this->options[$name] = $val;
2633 public function cleanopt(){
2634 unset($this->options['CURLOPT_HTTPGET']);
2635 unset($this->options['CURLOPT_POST']);
2636 unset($this->options['CURLOPT_POSTFIELDS']);
2637 unset($this->options['CURLOPT_PUT']);
2638 unset($this->options['CURLOPT_INFILE']);
2639 unset($this->options['CURLOPT_INFILESIZE']);
2640 unset($this->options['CURLOPT_CUSTOMREQUEST']);
2644 * Set HTTP Request Header
2646 * @param array $header
2648 public function setHeader($header) {
2649 if (is_array($header)){
2650 foreach ($header as $v) {
2651 $this->setHeader($v);
2654 $this->header[] = $header;
2659 * Set HTTP Response Header
2662 public function getResponse(){
2663 return $this->response;
2667 * private callback function
2668 * Formatting HTTP Response Header
2670 * @param resource $ch Apparently not used
2671 * @param string $header
2672 * @return int The strlen of the header
2674 private function formatHeader($ch, $header)
2677 if (strlen($header) > 2) {
2678 list($key, $value) = explode(" ", rtrim($header, "\r\n"), 2);
2679 $key = rtrim($key, ':');
2680 if (!empty($this->response[$key])) {
2681 if (is_array($this->response[$key])){
2682 $this->response[$key][] = $value;
2684 $tmp = $this->response[$key];
2685 $this->response[$key] = array();
2686 $this->response[$key][] = $tmp;
2687 $this->response[$key][] = $value;
2691 $this->response[$key] = $value;
2694 return strlen($header);
2698 * Set options for individual curl instance
2700 * @param resource $curl A curl handle
2701 * @param array $options
2702 * @return resource The curl handle
2704 private function apply_opt($curl, $options) {
2708 if (!empty($this->cookie) || !empty($options['cookie'])) {
2709 $this->setopt(array('cookiejar'=>$this->cookie,
2710 'cookiefile'=>$this->cookie
2715 if (!empty($this->proxy) || !empty($options['proxy'])) {
2716 $this->setopt($this->proxy);
2718 $this->setopt($options);
2719 // reset before set options
2720 curl_setopt($curl, CURLOPT_HEADERFUNCTION, array(&$this,'formatHeader'));
2722 if (empty($this->header)){
2723 $this->setHeader(array(
2724 'User-Agent: MoodleBot/1.0',
2725 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7',
2726 'Connection: keep-alive'
2729 curl_setopt($curl, CURLOPT_HTTPHEADER, $this->header);
2732 echo '<h1>Options</h1>';
2733 var_dump($this->options);
2734 echo '<h1>Header</h1>';
2735 var_dump($this->header);
2739 foreach($this->options as $name => $val) {
2740 if (is_string($name)) {
2741 $name = constant(strtoupper($name));
2743 curl_setopt($curl, $name, $val);
2749 * Download multiple files in parallel
2751 * Calls {@link multi()} with specific download headers
2755 * $c->download(array(
2756 * array('url'=>'http://localhost/', 'file'=>fopen('a', 'wb')),
2757 * array('url'=>'http://localhost/20/', 'file'=>fopen('b', 'wb'))
2761 * @param array $requests An array of files to request
2762 * @param array $options An array of options to set
2763 * @return array An array of results
2765 public function download($requests, $options = array()) {
2766 $options['CURLOPT_BINARYTRANSFER'] = 1;
2767 $options['RETURNTRANSFER'] = false;
2768 return $this->multi($requests, $options);
2772 * Mulit HTTP Requests
2773 * This function could run multi-requests in parallel.
2775 * @param array $requests An array of files to request
2776 * @param array $options An array of options to set
2777 * @return array An array of results
2779 protected function multi($requests, $options = array()) {
2780 $count = count($requests);
2783 $main = curl_multi_init();
2784 for ($i = 0; $i < $count; $i++) {
2785 $url = $requests[$i];
2786 foreach($url as $n=>$v){
2787 $options[$n] = $url[$n];
2789 $handles[$i] = curl_init($url['url']);
2790 $this->apply_opt($handles[$i], $options);
2791 curl_multi_add_handle($main, $handles[$i]);
2795 curl_multi_exec($main, $running);
2796 } while($running > 0);
2797 for ($i = 0; $i < $count; $i++) {
2798 if (!empty($options['CURLOPT_RETURNTRANSFER'])) {
2801 $results[] = curl_multi_getcontent($handles[$i]);
2803 curl_multi_remove_handle($main, $handles[$i]);
2805 curl_multi_close($main);
2810 * Single HTTP Request
2812 * @param string $url The URL to request
2813 * @param array $options
2816 protected function request($url, $options = array()){
2817 // create curl instance
2818 $curl = curl_init($url);
2819 $options['url'] = $url;
2820 $this->apply_opt($curl, $options);
2821 if ($this->cache && $ret = $this->cache->get($this->options)) {
2824 $ret = curl_exec($curl);
2826 $this->cache->set($this->options, $ret);
2830 $this->info = curl_getinfo($curl);
2831 $this->error = curl_error($curl);
2834 echo '<h1>Return Data</h1>';
2836 echo '<h1>Info</h1>';
2837 var_dump($this->info);
2838 echo '<h1>Error</h1>';
2839 var_dump($this->error);
2844 if (empty($this->error)){
2847 return $this->error;
2848 // exception is not ajax friendly
2849 //throw new moodle_exception($this->error, 'curl');
2858 * @param string $url
2859 * @param array $options
2862 public function head($url, $options = array()){
2863 $options['CURLOPT_HTTPGET'] = 0;
2864 $options['CURLOPT_HEADER'] = 1;
2865 $options['CURLOPT_NOBODY'] = 1;
2866 return $this->request($url, $options);
2872 * @param string $url
2873 * @param array|string $params
2874 * @param array $options
2877 public function post($url, $params = '', $options = array()){
2878 $options['CURLOPT_POST'] = 1;
2879 if (is_array($params)) {
2880 $this->_tmp_file_post_params = array();
2881 foreach ($params as $key => $value) {
2882 if ($value instanceof stored_file) {
2883 $value->add_to_curl_request($this, $key);
2885 $this->_tmp_file_post_params[$key] = $value;
2888 $options['CURLOPT_POSTFIELDS'] = $this->_tmp_file_post_params;
2889 unset($this->_tmp_file_post_params);
2891 // $params is the raw post data
2892 $options['CURLOPT_POSTFIELDS'] = $params;
2894 return $this->request($url, $options);
2900 * @param string $url
2901 * @param array $params
2902 * @param array $options
2905 public function get($url, $params = array(), $options = array()){
2906 $options['CURLOPT_HTTPGET'] = 1;
2908 if (!empty($params)){
2909 $url .= (stripos($url, '?') !== false) ? '&' : '?';
2910 $url .= http_build_query($params, '', '&');
2912 return $this->request($url, $options);
2918 * @param string $url
2919 * @param array $params
2920 * @param array $options
2923 public function put($url, $params = array(), $options = array()){
2924 $file = $params['file'];
2925 if (!is_file($file)){
2928 $fp = fopen($file, 'r');
2929 $size = filesize($file);
2930 $options['CURLOPT_PUT'] = 1;
2931 $options['CURLOPT_INFILESIZE'] = $size;
2932 $options['CURLOPT_INFILE'] = $fp;
2933 if (!isset($this->options['CURLOPT_USERPWD'])){
2934 $this->setopt(array('CURLOPT_USERPWD'=>'anonymous: noreply@moodle.org'));
2936 $ret = $this->request($url, $options);
2942 * HTTP DELETE method
2944 * @param string $url
2945 * @param array $param
2946 * @param array $options
2949 public function delete($url, $param = array(), $options = array()){
2950 $options['CURLOPT_CUSTOMREQUEST'] = 'DELETE';
2951 if (!isset($options['CURLOPT_USERPWD'])) {
2952 $options['CURLOPT_USERPWD'] = 'anonymous: noreply@moodle.org';
2954 $ret = $this->request($url, $options);
2961 * @param string $url
2962 * @param array $options
2965 public function trace($url, $options = array()){
2966 $options['CURLOPT_CUSTOMREQUEST'] = 'TRACE';
2967 $ret = $this->request($url, $options);
2972 * HTTP OPTIONS method
2974 * @param string $url
2975 * @param array $options
2978 public function options($url, $options = array()){
2979 $options['CURLOPT_CUSTOMREQUEST'] = 'OPTIONS';
2980 $ret = $this->request($url, $options);
2985 * Get curl information
2989 public function get_info() {
2995 * This class is used by cURL class, use case:
2998 * $CFG->repositorycacheexpire = 120;
2999 * $CFG->curlcache = 120;
3001 * $c = new curl(array('cache'=>true), 'module_cache'=>'repository');
3002 * $ret = $c->get('http://www.google.com');
3005 * @package core_files
3006 * @copyright Dongsheng Cai <dongsheng@moodle.com>
3007 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
3010 /** @var string Path to cache directory */
3016 * @global stdClass $CFG
3017 * @param string $module which module is using curl_cache
3019 function __construct($module = 'repository'){
3021 if (!empty($module)) {
3022 $this->dir = $CFG->cachedir.'/'.$module.'/';
3024 $this->dir = $CFG->cachedir.'/misc/';
3026 if (!file_exists($this->dir)) {
3027 mkdir($this->dir, $CFG->directorypermissions, true);
3029 if ($module == 'repository') {
3030 if (empty($CFG->repositorycacheexpire)) {
3031 $CFG->repositorycacheexpire = 120;
3033 $this->ttl = $CFG->repositorycacheexpire;
3035 if (empty($CFG->curlcache)) {
3036 $CFG->curlcache = 120;
3038 $this->ttl = $CFG->curlcache;
3045 * @global stdClass $CFG
3046 * @global stdClass $USER
3047 * @param mixed $param
3048 * @return bool|string
3050 public function get($param){
3052 $this->cleanup($this->ttl);
3053 $filename = 'u'.$USER->id.'_'.md5(serialize($param));
3054 if(file_exists($this->dir.$filename)) {
3055 $lasttime = filemtime($this->dir.$filename);
3056 if(time()-$lasttime > $this->ttl)
3060 $fp = fopen($this->dir.$filename, 'r');
3061 $size = filesize($this->dir.$filename);
3062 $content = fread($fp, $size);
3063 return unserialize($content);
3072 * @global object $CFG
3073 * @global object $USER
3074 * @param mixed $param
3077 public function set($param, $val){
3079 $filename = 'u'.$USER->id.'_'.md5(serialize($param));
3080 $fp = fopen($this->dir.$filename, 'w');
3081 fwrite($fp, serialize($val));
3086 * Remove cache files
3088 * @param int $expire The number os seconds before expiry
3090 public function cleanup($expire){
3091 if($dir = opendir($this->dir)){
3092 while (false !== ($file = readdir($dir))) {
3093 if(!is_dir($file) && $file != '.' && $file != '..') {
3094 $lasttime = @filemtime($this->dir.$file);
3095 if(time() - $lasttime > $expire){
3096 @unlink($this->dir.$file);
3103 * delete current user's cache file
3105 * @global object $CFG
3106 * @global object $USER
3108 public function refresh(){
3110 if($dir = opendir($this->dir)){
3111 while (false !== ($file = readdir($dir))) {
3112 if(!is_dir($file) && $file != '.' && $file != '..') {
3113 if(strpos($file, 'u'.$USER->id.'_')!==false){
3114 @unlink($this->dir.$file);
3123 * This class is used to parse lib/file/file_types.mm which help get file extensions by file types.
3125 * The file_types.mm file can be edited by freemind in graphic environment.
3127 * @package core_files
3129 * @copyright 2009 Dongsheng Cai <dongsheng@moodle.com>
3130 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
3132 class filetype_parser {
3134 * Check file_types.mm file, setup variables
3136 * @global stdClass $CFG
3137 * @param string $file
3139 public function __construct($file = '') {
3142 $this->file = $CFG->libdir.'/filestorage/file_types.mm';
3144 $this->file = $file;
3146 $this->tree = array();
3147 $this->result = array();
3151 * A private function to browse xml nodes
3153 * @param array $parent
3154 * @param array $types
3156 private function _browse_nodes($parent, $types) {
3157 $key = (string)$parent['TEXT'];
3158 if(isset($parent->node)) {
3159 $this->tree[$key] = array();
3160 if (in_array((string)$parent['TEXT'], $types)) {
3161 $this->_select_nodes($parent, $this->result);
3163 foreach($parent->node as $v){
3164 $this->_browse_nodes($v, $types);
3168 $this->tree[] = $key;
3173 * A private function to select text nodes
3175 * @param array $parent
3177 private function _select_nodes($parent){
3178 if(isset($parent->node)) {
3179 foreach($parent->node as $v){
3180 $this->_select_nodes($v, $this->result);
3183 $this->result[] = (string)$parent['TEXT'];
3189 * Get file extensions by file types names.
3191 * @param array $types
3194 public function get_extensions($types) {
3195 if (!is_array($types)) {
3196 $types = array($types);
3198 $this->result = array();
3199 if ((is_array($types) && in_array('*', $types)) ||
3200 $types == '*' || empty($types)) {
3203 foreach ($types as $key=>$value){
3204 if (strpos($value, '.') !== false) {
3205 $this->result[] = $value;
3206 unset($types[$key]);
3209 if (file_exists($this->file)) {
3210 $xml = simplexml_load_file($this->file);
3211 foreach($xml->node->node as $v){
3212 if (in_array((string)$v['TEXT'], $types)) {
3213 $this->_select_nodes($v);
3215 $this->_browse_nodes($v, $types);
3219 exit('Failed to open file lib/filestorage/file_types.mm');
3221 return $this->result;
3226 * This function delegates file serving to individual plugins
3228 * @param string $relativepath
3229 * @param bool $forcedownload
3230 * @param null|string $preview the preview mode, defaults to serving the original file
3231 * @todo MDL-31088 file serving improments
3233 function file_pluginfile($relativepath, $forcedownload, $preview = null) {
3234 global $DB, $CFG, $USER;
3235 // relative path must start with '/'
3236 if (!$relativepath) {
3237 print_error('invalidargorconf');
3238 } else if ($relativepath[0] != '/') {
3239 print_error('pathdoesnotstartslash');
3242 // extract relative path components
3243 $args = explode('/', ltrim($relativepath, '/'));
3245 if (count($args) < 3) { // always at least context, component and filearea
3246 print_error('invalidarguments');
3249 $contextid = (int)array_shift($args);
3250 $component = clean_param(array_shift($args), PARAM_COMPONENT);
3251 $filearea = clean_param(array_shift($args), PARAM_AREA);
3253 list($context, $course, $cm) = get_context_info_array($contextid);
3255 $fs = get_file_storage();
3257 // ========================================================================================================================
3258 if ($component === 'blog') {
3259 // Blog file serving
3260 if ($context->contextlevel != CONTEXT_SYSTEM) {
3261 send_file_not_found();
3263 if ($filearea !== 'attachment' and $filearea !== 'post') {
3264 send_file_not_found();
3267 if (empty($CFG->bloglevel)) {
3268 print_error('siteblogdisable', 'blog');
3271 $entryid = (int)array_shift($args);
3272 if (!$entry = $DB->get_record('post', array('module'=>'blog', 'id'=>$entryid))) {
3273 send_file_not_found();
3275 if ($CFG->bloglevel < BLOG_GLOBAL_LEVEL) {
3277 if (isguestuser()) {
3278 print_error('noguest');
3280 if ($CFG->bloglevel == BLOG_USER_LEVEL) {
3281 if ($USER->id != $entry->userid) {
3282 send_file_not_found();
3287 if ('publishstate' === 'public') {
3288 if ($CFG->forcelogin) {
3292 } else if ('publishstate' === 'site') {
3295 } else if ('publishstate' === 'draft') {
3297 if ($USER->id != $entry->userid) {
3298 send_file_not_found();
3302 $filename = array_pop($args);
3303 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
3305 if (!$file = $fs->get_file($context->id, $component, $filearea, $entryid, $filepath, $filename) or $file->is_directory()) {
3306 send_file_not_found();
3309 send_stored_file($file, 10*60, 0, true, array('preview' => $preview)); // download MUST be forced - security!
3311 // ========================================================================================================================
3312 } else if ($component === 'grade') {
3313 if (($filearea === 'outcome' or $filearea === 'scale') and $context->contextlevel == CONTEXT_SYSTEM) {
3314 // Global gradebook files
3315 if ($CFG->forcelogin) {
3319 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
3321 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
3322 send_file_not_found();
3325 session_get_instance()->write_close(); // unlock session during fileserving
3326 send_stored_file($file, 60*60, 0, $forcedownload, array('preview' => $preview));
3328 } else if ($filearea === 'feedback' and $context->contextlevel == CONTEXT_COURSE) {
3329 //TODO: nobody implemented this yet in grade edit form!!
3330 send_file_not_found();
3332 if ($CFG->forcelogin || $course->id != SITEID) {
3333 require_login($course);
3336 $fullpath = "/$context->id/$component/$filearea/".implode('/', $args);
3338 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
3339 send_file_not_found();
3342 session_get_instance()->write_close(); // unlock session during fileserving
3343 send_stored_file($file, 60*60, 0, $forcedownload, array('preview' => $preview));
3345 send_file_not_found();
3348 // ========================================================================================================================
3349 } else if ($component === 'tag') {
3350 if ($filearea === 'description' and $context->contextlevel == CONTEXT_SYSTEM) {
3352 // All tag descriptions are going to be public but we still need to respect forcelogin
3353 if ($CFG->forcelogin) {
3357 $fullpath = "/$context->id/tag/description/".implode('/', $args);
3359 if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
3360 send_file_not_found();
3363 session_get_instance()->write_close(); // unlock session during fileserving
3364 send_stored_file($file, 60*60, 0, true, array('preview' => $preview));
3367 send_file_not_found();
3370 // ========================================================================================================================
3371 } else if ($component === 'calendar') {
3372 if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_SYSTEM) {
3374 // All events here are public the one requirement is that we respect forcelogin
3375 if ($CFG->forcelogin) {
3379 // Get the event if from the args array
3380 $eventid = array_shift($args);
3382 // Load the event from the database
3383 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'eventtype'=>'site'))) {
3384 send_file_not_found();
3386 // Check that we got an event and that it's userid is that of the user
3388 // Get the file and serve if successful
3389 $filename = array_pop($args);
3390 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
3391 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
3392 send_file_not_found();
3395 session_get_instance()->write_close(); // unlock session during fileserving
3396 send_stored_file($file, 60*60, 0, $forcedownload, array('preview' => $preview));
3398 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_USER) {
3400 // Must be logged in, if they are not then they obviously can't be this user
3403 // Don't want guests here, potentially saves a DB call
3404 if (isguestuser()) {
3405 send_file_not_found();
3408 // Get the event if from the args array
3409 $eventid = array_shift($args);
3411 // Load the event from the database - user id must match
3412 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'userid'=>$USER->id, 'eventtype'=>'user'))) {
3413 send_file_not_found();
3416 // Get the file and serve if successful
3417 $filename = array_pop($args);
3418 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
3419 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
3420 send_file_not_found();
3423 session_get_instance()->write_close(); // unlock session during fileserving
3424 send_stored_file($file, 60*60, 0, $forcedownload, array('preview' => $preview));
3426 } else if ($filearea === 'event_description' and $context->contextlevel == CONTEXT_COURSE) {
3428 // Respect forcelogin and require login unless this is the site.... it probably
3429 // should NEVER be the site
3430 if ($CFG->forcelogin || $course->id != SITEID) {
3431 require_login($course);
3434 // Must be able to at least view the course
3435 if (!is_enrolled($context) and !is_viewing($context)) {
3436 //TODO: hmm, do we really want to block guests here?
3437 send_file_not_found();
3441 $eventid = array_shift($args);
3443 // Load the event from the database we need to check whether it is
3444 // a) valid course event
3446 // Group events use the course context (there is no group context)
3447 if (!$event = $DB->get_record('event', array('id'=>(int)$eventid, 'courseid'=>$course->id))) {
3448 send_file_not_found();
3451 // If its a group event require either membership of view all groups capability
3452 if ($event->eventtype === 'group') {
3453 if (!has_capability('moodle/site:accessallgroups', $context) && !groups_is_member($event->groupid, $USER->id)) {
3454 send_file_not_found();
3456 } else if ($event->eventtype === 'course') {
3460 send_file_not_found();
3463 // If we get this far we can serve the file
3464 $filename = array_pop($args);
3465 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
3466 if (!$file = $fs->get_file($context->id, $component, $filearea, $eventid, $filepath, $filename) or $file->is_directory()) {
3467 send_file_not_found();
3470 session_get_instance()->write_close(); // unlock session during fileserving
3471 send_stored_file($file, 60*60, 0, $forcedownload, array('preview' => $preview));
3474 send_file_not_found();
3477 // ========================================================================================================================
3478 } else if ($component === 'user') {
3479 if ($filearea === 'icon' and $context->contextlevel == CONTEXT_USER) {
3481 if (count($args) == 1) {
3482 $themename = theme_config::DEFAULT_THEME;
3483 $filename = array_shift($args);
3485 $themename = array_shift($args);
3486 $filename = array_shift($args);
3488 if ((!empty($CFG->forcelogin) and !isloggedin()) ||
3489 (!empty($CFG->forceloginforprofileimage) && (!isloggedin() || isguestuser()))) {
3490 // protect images if login required and not logged in;
3491 // also if login is required for profile images and is not logged in or guest
3492 // do not use require_login() because it is expensive and not suitable here anyway
3495 if (!$redirect and ($filename !== 'f1' and $filename !== 'f2')) {
3499 if (!$redirect && !$file = $fs->get_file($context->id, 'user', 'icon', 0, '/', $filename.'/.png')) {
3500 if (!$file = $fs->get_file($context->id, 'user', 'icon', 0, '/', $filename.'/.jpg')) {
3505 $theme = theme_config::load($themename);
3506 redirect($theme->pix_url('u/'.$filename, 'moodle'));
3508 send_stored_file($file, 60*60*24, 0, false, array('preview' => $preview)); // enable long caching, there are many images on each page
3510 } else if ($filearea === 'private' and $context->contextlevel == CONTEXT_USER) {
3513 if (isguestuser()) {
3514 send_file_not_found();
3517 if ($USER->id !== $context->instanceid) {
3518 send_file_not_found();
3521 $filename = array_pop($args);
3522 $filepath = $args ? '/'.implode('/', $args).'/' : '/';
3523 if (!$file = $fs->get_file($context->id, $component, $filearea, 0, $filepath, $filename) or $file->is_directory()) {
3524 send_file_not_found();
3527 session_get_instance()->write_close(); // unlock session during fileserving
3528 send_stored_file($file, 0, 0, true, array('preview' => $preview)); // must force download - security!
3530 } else if ($filearea === 'profile' and $context->contextlevel == CONTEXT_USER) {
3532 if ($CFG->forcelogin) {
3536 $userid = $context->instanceid;
3538 if ($USER->id == $userid) {
3539 // always can access own
3541 } else if (!empty($CFG->forceloginforprofiles)) {
3544 if (isguestuser()) {
3545 send_file_not_found();
3548 // we allow access to site profile of all course contacts (usually teachers)
3549 if (!has_coursecontact_role($userid) && !has_capability('moodle/user:viewdetails', $context)) {
3550 send_file_not_found();
3554 if (has_capability('moodle/user:viewdetails', $context)) {