MDL-33160 fixed some icons and groups for file types
[moodle.git] / lib / filelib.php
CommitLineData
64a19b38 1<?php
64a19b38 2// This file is part of Moodle - http://moodle.org/
3//
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.
8//
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.
13//
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/>.
edc0c493 16
17/**
18 * Functions for file handling.
19 *
d2b7803e
DC
20 * @package core_files
21 * @copyright 1999 onwards Martin Dougiamas (http://dougiamas.com)
22 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
edc0c493 23 */
24
64f93798
PS
25defined('MOODLE_INTERNAL') || die();
26
d2b7803e
DC
27/**
28 * BYTESERVING_BOUNDARY - string unique string constant.
29 */
edc0c493 30define('BYTESERVING_BOUNDARY', 's1k2o3d4a5k6s7');
4c8c65ec 31
64f93798
PS
32require_once("$CFG->libdir/filestorage/file_exceptions.php");
33require_once("$CFG->libdir/filestorage/file_storage.php");
34require_once("$CFG->libdir/filestorage/zip_packer.php");
35require_once("$CFG->libdir/filebrowser/file_browser.php");
172dd12c 36
4eef1399 37/**
38 * Encodes file serving url
ba21c9d4 39 *
f28ee49e
PS
40 * @deprecated use moodle_url factory methods instead
41 *
d2b7803e
DC
42 * @todo MDL-31071 deprecate this function
43 * @global stdClass $CFG
4eef1399 44 * @param string $urlbase
45 * @param string $path /filearea/itemid/dir/dir/file.exe
46 * @param bool $forcedownload
47 * @param bool $https https url required
48 * @return string encoded file url
49 */
50function file_encode_url($urlbase, $path, $forcedownload=false, $https=false) {
51 global $CFG;
52
f28ee49e
PS
53//TODO: deprecate this
54
4eef1399 55 if ($CFG->slasharguments) {
56 $parts = explode('/', $path);
57 $parts = array_map('rawurlencode', $parts);
58 $path = implode('/', $parts);
59 $return = $urlbase.$path;
60 if ($forcedownload) {
61 $return .= '?forcedownload=1';
62 }
63 } else {
64 $path = rawurlencode($path);
65 $return = $urlbase.'?file='.$path;
66 if ($forcedownload) {
67 $return .= '&amp;forcedownload=1';
68 }
69 }
70
71 if ($https) {
72 $return = str_replace('http://', 'https://', $return);
73 }
74
75 return $return;
76}
77
c94882ff 78/**
db2cc99b 79 * Prepares 'editor' formslib element from data in database
ba21c9d4 80 *
db2cc99b 81 * The passed $data record must contain field foobar, foobarformat and optionally foobartrust. This
34ff25a6
PS
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
db2cc99b 84 * displayed.
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.
87 *
d2b7803e
DC
88 * @category files
89 * @param stdClass $data database field that holds the html text with embedded media
34ff25a6 90 * @param string $field the name of the database field that holds the html text with embedded media
db2cc99b 91 * @param array $options editor options (like maxifiles, maxbytes etc.)
d2b7803e 92 * @param stdClass $context context of the editor
64f93798 93 * @param string $component
c94882ff 94 * @param string $filearea file area name
95 * @param int $itemid item id, required if item exists
d2b7803e 96 * @return stdClass modified data object
c94882ff 97 */
64f93798 98function file_prepare_standard_editor($data, $field, array $options, $context=null, $component=null, $filearea=null, $itemid=null) {
c94882ff 99 $options = (array)$options;
100 if (!isset($options['trusttext'])) {
101 $options['trusttext'] = false;
102 }
103 if (!isset($options['forcehttps'])) {
104 $options['forcehttps'] = false;
105 }
106 if (!isset($options['subdirs'])) {
107 $options['subdirs'] = false;
108 }
989c16ee 109 if (!isset($options['maxfiles'])) {
110 $options['maxfiles'] = 0; // no files by default
111 }
b96ddb7d 112 if (!isset($options['noclean'])) {
113 $options['noclean'] = false;
114 }
c94882ff 115
f9157eb7
RT
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);
127 }
128 }
32dc8ecd 129
d5934b35 130 if (is_null($itemid) or is_null($context)) {
c94882ff 131 $contextid = null;
d5934b35 132 $itemid = null;
b85b25eb
PS
133 if (!isset($data)) {
134 $data = new stdClass();
135 }
c94882ff 136 if (!isset($data->{$field})) {
137 $data->{$field} = '';
138 }
139 if (!isset($data->{$field.'format'})) {
20e5da7d 140 $data->{$field.'format'} = editors_get_preferred_format();
b96ddb7d 141 }
142 if (!$options['noclean']) {
143 $data->{$field} = clean_text($data->{$field}, $data->{$field.'format'});
c94882ff 144 }
c94882ff 145
146 } else {
147 if ($options['trusttext']) {
b96ddb7d 148 // noclean ignored if trusttext enabled
c94882ff 149 if (!isset($data->{$field.'trust'})) {
150 $data->{$field.'trust'} = 0;
151 }
152 $data = trusttext_pre_edit($data, $field, $context);
153 } else {
b96ddb7d 154 if (!$options['noclean']) {
155 $data->{$field} = clean_text($data->{$field}, $data->{$field.'format'});
156 }
c94882ff 157 }
158 $contextid = $context->id;
159 }
160
989c16ee 161 if ($options['maxfiles'] != 0) {
162 $draftid_editor = file_get_submitted_draft_itemid($field);
64f93798 163 $currenttext = file_prepare_draft_area($draftid_editor, $contextid, $component, $filearea, $itemid, $options, $data->{$field});
989c16ee 164 $data->{$field.'_editor'} = array('text'=>$currenttext, 'format'=>$data->{$field.'format'}, 'itemid'=>$draftid_editor);
165 } else {
8302aae1 166 $data->{$field.'_editor'} = array('text'=>$data->{$field}, 'format'=>$data->{$field.'format'}, 'itemid'=>0);
989c16ee 167 }
c94882ff 168
169 return $data;
170}
171
172/**
34ff25a6 173 * Prepares the content of the 'editor' form element with embedded media files to be saved in database
ba21c9d4 174 *
19fbc617 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
34ff25a6 181 * foobartrust, where foobar has URL to embedded files encoded.
19fbc617 182 *
d2b7803e
DC
183 * @category files
184 * @param stdClass $data raw data submitted by the form
34ff25a6 185 * @param string $field name of the database field containing the html with embedded media files
19fbc617 186 * @param array $options editor options (trusttext, subdirs, maxfiles, maxbytes etc.)
d2b7803e
DC
187 * @param stdClass $context context, required for existing data
188 * @param string $component file component
c94882ff 189 * @param string $filearea file area name
190 * @param int $itemid item id, required if item exists
d2b7803e 191 * @return stdClass modified data object
c94882ff 192 */
64f93798 193function file_postupdate_standard_editor($data, $field, array $options, $context, $component=null, $filearea=null, $itemid=null) {
c94882ff 194 $options = (array)$options;
195 if (!isset($options['trusttext'])) {
196 $options['trusttext'] = false;
197 }
198 if (!isset($options['forcehttps'])) {
199 $options['forcehttps'] = false;
200 }
201 if (!isset($options['subdirs'])) {
202 $options['subdirs'] = false;
203 }
204 if (!isset($options['maxfiles'])) {
85db95e7 205 $options['maxfiles'] = 0; // no files by default
c94882ff 206 }
207 if (!isset($options['maxbytes'])) {
208 $options['maxbytes'] = 0; // unlimited
209 }
210
211 if ($options['trusttext']) {
19fbc617 212 $data->{$field.'trust'} = trusttext_trusted($context);
c94882ff 213 } else {
19fbc617 214 $data->{$field.'trust'} = 0;
c94882ff 215 }
216
85db95e7 217 $editor = $data->{$field.'_editor'};
c94882ff 218
9057a848 219 if ($options['maxfiles'] == 0 or is_null($filearea) or is_null($itemid) or empty($editor['itemid'])) {
989c16ee 220 $data->{$field} = $editor['text'];
7f0fedc0 221 } else {
64f93798 222 $data->{$field} = file_save_draft_area_files($editor['itemid'], $context->id, $component, $filearea, $itemid, $options, $editor['text'], $options['forcehttps']);
989c16ee 223 }
c94882ff 224 $data->{$field.'format'} = $editor['format'];
225
226 return $data;
227}
228
229/**
230 * Saves text and files modified by Editor formslib element
ba21c9d4 231 *
d2b7803e
DC
232 * @category files
233 * @param stdClass $data $database entry field
c94882ff 234 * @param string $field name of data field
235 * @param array $options various options
d2b7803e 236 * @param stdClass $context context - must already exist
64f93798 237 * @param string $component
c94882ff 238 * @param string $filearea file area name
239 * @param int $itemid must already exist, usually means data is in db
d2b7803e 240 * @return stdClass modified data obejct
c94882ff 241 */
64f93798 242function file_prepare_standard_filemanager($data, $field, array $options, $context=null, $component=null, $filearea=null, $itemid=null) {
c94882ff 243 $options = (array)$options;
244 if (!isset($options['subdirs'])) {
245 $options['subdirs'] = false;
246 }
d5934b35 247 if (is_null($itemid) or is_null($context)) {
248 $itemid = null;
c94882ff 249 $contextid = null;
250 } else {
251 $contextid = $context->id;
252 }
253
85db95e7 254 $draftid_editor = file_get_submitted_draft_itemid($field.'_filemanager');
64f93798 255 file_prepare_draft_area($draftid_editor, $contextid, $component, $filearea, $itemid, $options);
85db95e7 256 $data->{$field.'_filemanager'} = $draftid_editor;
c94882ff 257
258 return $data;
259}
260
261/**
262 * Saves files modified by File manager formslib element
ba21c9d4 263 *
d2b7803e
DC
264 * @todo MDL-31073 review this function
265 * @category files
266 * @param stdClass $data $database entry field
c94882ff 267 * @param string $field name of data field
268 * @param array $options various options
d2b7803e 269 * @param stdClass $context context - must already exist
64f93798 270 * @param string $component
c94882ff 271 * @param string $filearea file area name
272 * @param int $itemid must already exist, usually means data is in db
d2b7803e 273 * @return stdClass modified data obejct
c94882ff 274 */
64f93798 275function file_postupdate_standard_filemanager($data, $field, array $options, $context, $component, $filearea, $itemid) {
c94882ff 276 $options = (array)$options;
277 if (!isset($options['subdirs'])) {
278 $options['subdirs'] = false;
279 }
280 if (!isset($options['maxfiles'])) {
281 $options['maxfiles'] = -1; // unlimited
282 }
283 if (!isset($options['maxbytes'])) {
284 $options['maxbytes'] = 0; // unlimited
285 }
286
85db95e7 287 if (empty($data->{$field.'_filemanager'})) {
c94882ff 288 $data->$field = '';
289
290 } else {
64f93798 291 file_save_draft_area_files($data->{$field.'_filemanager'}, $context->id, $component, $filearea, $itemid, $options);
c94882ff 292 $fs = get_file_storage();
293
64f93798
PS
294 if ($fs->get_area_files($context->id, $component, $filearea, $itemid)) {
295 $data->$field = '1'; // TODO: this is an ugly hack (skodak)
c94882ff 296 } else {
297 $data->$field = '';
298 }
299 }
300
301 return $data;
302}
303
8546def3 304/**
d2b7803e 305 * Generate a draft itemid
ba21c9d4 306 *
d2b7803e
DC
307 * @category files
308 * @global moodle_database $DB
309 * @global stdClass $USER
509f67e3 310 * @return int a random but available draft itemid that can be used to create a new draft
edc0c493 311 * file area.
8546def3 312 */
edc0c493 313function file_get_unused_draft_itemid() {
8546def3 314 global $DB, $USER;
315
316 if (isguestuser() or !isloggedin()) {
85db95e7 317 // guests and not-logged-in users can not be allowed to upload anything!!!!!!
8546def3 318 print_error('noguest');
319 }
320
321 $contextid = get_context_instance(CONTEXT_USER, $USER->id)->id;
8546def3 322
323 $fs = get_file_storage();
324 $draftitemid = rand(1, 999999999);
64f93798 325 while ($files = $fs->get_area_files($contextid, 'user', 'draft', $draftitemid)) {
8546def3 326 $draftitemid = rand(1, 999999999);
327 }
328
b933a139 329 return $draftitemid;
8546def3 330}
331
7983d682 332/**
edc0c493 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');
ba21c9d4 336 *
d2b7803e
DC
337 * @category files
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.
64f93798 342 * @param string $component
edc0c493 343 * @param string $filearea helps indentify the file area.
d2b7803e 344 * @param int $itemid helps identify the file area. Can be null if there are no files yet.
33374f76 345 * @param array $options text and file options ('subdirs'=>false, 'forcehttps'=>false)
edc0c493 346 * @param string $text some html content that needs to have embedded links rewritten to point to the draft area.
d2b7803e 347 * @return string|null returns string if $text was passed in, the rewritten $text is returned. Otherwise NULL.
7983d682 348 */
64f93798 349function file_prepare_draft_area(&$draftitemid, $contextid, $component, $filearea, $itemid, array $options=null, $text=null) {
893fe4b6 350 global $CFG, $USER, $CFG;
7983d682 351
a19a06d0 352 $options = (array)$options;
353 if (!isset($options['subdirs'])) {
354 $options['subdirs'] = false;
355 }
33374f76 356 if (!isset($options['forcehttps'])) {
a19a06d0 357 $options['forcehttps'] = false;
358 }
359
8546def3 360 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
b933a139 361 $fs = get_file_storage();
362
363 if (empty($draftitemid)) {
364 // create a new area and copy existing files into
edc0c493 365 $draftitemid = file_get_unused_draft_itemid();
64f93798
PS
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, $itemid)) {
b933a139 368 foreach ($files as $file) {
64f93798
PS
369 if ($file->is_directory() and $file->get_filepath() === '/') {
370 // we need a way to mark the age of each draft area,
371 // by not copying the root dir we force it to be created automatically with current timestamp
372 continue;
373 }
a19a06d0 374 if (!$options['subdirs'] and ($file->is_directory() or $file->get_filepath() !== '/')) {
b5b188ce 375 continue;
376 }
67233725 377 $draftfile = $fs->create_file_from_storedfile($file_record, $file);
61506a0a 378 // XXX: This is a hack for file manager (MDL-28666)
67233725
DC
379 // File manager needs to know the original file information before copying
380 // to draft area, so we append these information in mdl_files.source field
381 // {@link file_storage::search_references()}
382 // {@link file_storage::search_references_count()}
383 $sourcefield = $file->get_source();
384 $newsourcefield = new stdClass;
385 $newsourcefield->source = $sourcefield;
386 $original = new stdClass;
387 $original->contextid = $contextid;
388 $original->component = $component;
389 $original->filearea = $filearea;
390 $original->itemid = $itemid;
391 $original->filename = $file->get_filename();
392 $original->filepath = $file->get_filepath();
393 $newsourcefield->original = file_storage::pack_reference($original);
394 $draftfile->set_source(serialize($newsourcefield));
395 // End of file manager hack
b933a139 396 }
397 }
893fe4b6
PS
398 if (!is_null($text)) {
399 // at this point there should not be any draftfile links yet,
400 // because this is a new text from database that should still contain the @@pluginfile@@ links
401 // this happens when developers forget to post process the text
402 $text = str_replace("\"$CFG->httpswwwroot/draftfile.php", "\"$CFG->httpswwwroot/brokenfile.php#", $text);
403 }
b933a139 404 } else {
405 // nothing to do
406 }
407
408 if (is_null($text)) {
409 return null;
410 }
411
edc0c493 412 // relink embedded files - editor can not handle @@PLUGINFILE@@ !
64f93798 413 return file_rewrite_pluginfile_urls($text, 'draftfile.php', $usercontext->id, 'user', 'draft', $draftitemid, $options);
644d506a 414}
415
416/**
edc0c493 417 * Convert encoded URLs in $text from the @@PLUGINFILE@@/... form to an actual URL.
ba21c9d4 418 *
d2b7803e
DC
419 * @category files
420 * @global stdClass $CFG
edc0c493 421 * @param string $text The content that may contain ULRs in need of rewriting.
422 * @param string $file The script that should be used to serve these files. pluginfile.php, draftfile.php, etc.
d2b7803e 423 * @param int $contextid This parameter and the next two identify the file area to use.
64f93798 424 * @param string $component
34ff25a6 425 * @param string $filearea helps identify the file area.
d2b7803e 426 * @param int $itemid helps identify the file area.
33374f76 427 * @param array $options text and file options ('forcehttps'=>false)
edc0c493 428 * @return string the processed text.
644d506a 429 */
64f93798 430function file_rewrite_pluginfile_urls($text, $file, $contextid, $component, $filearea, $itemid, array $options=null) {
644d506a 431 global $CFG;
b933a139 432
33374f76
MH
433 $options = (array)$options;
434 if (!isset($options['forcehttps'])) {
435 $options['forcehttps'] = false;
436 }
437
edc0c493 438 if (!$CFG->slasharguments) {
439 $file = $file . '?file=';
b933a139 440 }
8546def3 441
64f93798 442 $baseurl = "$CFG->wwwroot/$file/$contextid/$component/$filearea/";
7d2948bd 443
444 if ($itemid !== null) {
445 $baseurl .= "$itemid/";
446 }
edc0c493 447
33374f76 448 if ($options['forcehttps']) {
edc0c493 449 $baseurl = str_replace('http://', 'https://', $baseurl);
b933a139 450 }
451
edc0c493 452 return str_replace('@@PLUGINFILE@@/', $baseurl, $text);
b933a139 453}
454
12fab708 455/**
edc0c493 456 * Returns information about files in a draft area.
ba21c9d4 457 *
d2b7803e
DC
458 * @global stdClass $CFG
459 * @global stdClass $USER
460 * @param int $draftitemid the draft area item id.
edc0c493 461 * @return array with the following entries:
462 * 'filecount' => number of files in the draft area.
463 * (more information will be added as needed).
12fab708 464 */
edc0c493 465function file_get_draft_area_info($draftitemid) {
12fab708 466 global $CFG, $USER;
467
468 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
469 $fs = get_file_storage();
470
edc0c493 471 $results = array();
472
473 // The number of files
64f93798 474 $draftfiles = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id', false);
b6accf69 475 $results['filecount'] = count($draftfiles);
529377b5
DC
476 $results['filesize'] = 0;
477 foreach ($draftfiles as $file) {
478 $results['filesize'] += $file->get_filesize();
479 }
b6accf69
DC
480
481 return $results;
482}
483
ea1780ad
DC
484/**
485 * Get used space of files
d2b7803e
DC
486 * @global moodle_database $DB
487 * @global stdClass $USER
34ff25a6 488 * @return int total bytes
ea1780ad
DC
489 */
490function file_get_user_used_space() {
e35194be 491 global $DB, $USER;
ea1780ad
DC
492
493 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
e35194be
DC
494 $sql = "SELECT SUM(files1.filesize) AS totalbytes FROM {files} files1
495 JOIN (SELECT contenthash, filename, MAX(id) AS id
496 FROM {files}
497 WHERE contextid = ? AND component = ? AND filearea != ?
498 GROUP BY contenthash, filename) files2 ON files1.id = files2.id";
499 $params = array('contextid'=>$usercontext->id, 'component'=>'user', 'filearea'=>'draft');
500 $record = $DB->get_record_sql($sql, $params);
501 return (int)$record->totalbytes;
ea1780ad 502}
f0e5f031 503
504/**
505 * Convert any string to a valid filepath
d2b7803e 506 * @todo review this function
f0e5f031 507 * @param string $str
508 * @return string path
509 */
64f93798 510function file_correct_filepath($str) { //TODO: what is this? (skodak)
f36cb951
DC
511 if ($str == '/' or empty($str)) {
512 return '/';
513 } else {
514 return '/'.trim($str, './@#$ ').'/';
515 }
f0e5f031 516}
517
518/**
34ff25a6 519 * Generate a folder tree of draft area of current USER recursively
d2b7803e
DC
520 *
521 * @todo MDL-31073 use normal return value instead, this does not fit the rest of api here (skodak)
522 * @param int $draftitemid
f0e5f031 523 * @param string $filepath
d2b7803e 524 * @param mixed $data
f0e5f031 525 */
64f93798 526function file_get_drafarea_folders($draftitemid, $filepath, &$data) {
f0e5f031 527 global $USER, $OUTPUT, $CFG;
528 $data->children = array();
529 $context = get_context_instance(CONTEXT_USER, $USER->id);
530 $fs = get_file_storage();
64f93798 531 if ($files = $fs->get_directory_files($context->id, 'user', 'draft', $draftitemid, $filepath, false)) {
f0e5f031 532 foreach ($files as $file) {
533 if ($file->is_directory()) {
6bdfef5d 534 $item = new stdClass();
f79321f1 535 $item->sortorder = $file->get_sortorder();
f0e5f031 536 $item->filepath = $file->get_filepath();
537
538 $foldername = explode('/', trim($item->filepath, '/'));
539 $item->fullname = trim(array_pop($foldername), '/');
540
541 $item->id = uniqid();
64f93798 542 file_get_drafarea_folders($draftitemid, $item->filepath, $item);
f0e5f031 543 $data->children[] = $item;
544 } else {
545 continue;
546 }
547 }
548 }
549}
550
551/**
552 * Listing all files (including folders) in current path (draft area)
553 * used by file manager
554 * @param int $draftitemid
555 * @param string $filepath
d2b7803e 556 * @return stdClass
f0e5f031 557 */
64f93798 558function file_get_drafarea_files($draftitemid, $filepath = '/') {
f0e5f031 559 global $USER, $OUTPUT, $CFG;
560
561 $context = get_context_instance(CONTEXT_USER, $USER->id);
562 $fs = get_file_storage();
563
6bdfef5d 564 $data = new stdClass();
f0e5f031 565 $data->path = array();
566 $data->path[] = array('name'=>get_string('files'), 'path'=>'/');
567
568 // will be used to build breadcrumb
e709ddd2 569 $trail = '/';
f0e5f031 570 if ($filepath !== '/') {
571 $filepath = file_correct_filepath($filepath);
572 $parts = explode('/', $filepath);
573 foreach ($parts as $part) {
574 if ($part != '' && $part != null) {
e709ddd2 575 $trail .= ($part.'/');
f0e5f031 576 $data->path[] = array('name'=>$part, 'path'=>$trail);
577 }
578 }
579 }
580
581 $list = array();
f79321f1 582 $maxlength = 12;
64f93798 583 if ($files = $fs->get_directory_files($context->id, 'user', 'draft', $draftitemid, $filepath, false)) {
f0e5f031 584 foreach ($files as $file) {
6bdfef5d 585 $item = new stdClass();
f0e5f031 586 $item->filename = $file->get_filename();
587 $item->filepath = $file->get_filepath();
588 $item->fullname = trim($item->filename, '/');
589 $filesize = $file->get_filesize();
e709ddd2 590 $item->size = $filesize ? $filesize : null;
f0e5f031 591 $item->filesize = $filesize ? display_size($filesize) : '';
592
f79321f1 593 $item->sortorder = $file->get_sortorder();
e709ddd2
MG
594 $item->author = $file->get_author();
595 $item->license = $file->get_license();
596 $item->datemodified = $file->get_timemodified();
597 $item->datecreated = $file->get_timecreated();
9a62f779 598 $item->isref = $file->is_external_file();
6dd299be
MG
599 // find the file this draft file was created from and count all references in local
600 // system pointing to that file
601 $source = unserialize($file->get_source());
602 if (isset($source->original)) {
603 $item->refcount = $fs->search_references_count($source->original);
604 }
f0e5f031 605
f0e5f031 606 if ($file->is_directory()) {
607 $item->filesize = 0;
559276b1 608 $item->icon = $OUTPUT->pix_url(file_folder_icon(24))->out(false);
f0e5f031 609 $item->type = 'folder';
610 $foldername = explode('/', trim($item->filepath, '/'));
611 $item->fullname = trim(array_pop($foldername), '/');
559276b1 612 $item->thumbnail = $OUTPUT->pix_url(file_folder_icon(90))->out(false);
f0e5f031 613 } else {
64f93798 614 // do NOT use file browser here!
559276b1
MG
615 $item->mimetype = get_mimetype_description($file);
616 if (file_mimetype_in_typegroup($item->mimetype, 'archive')) {
617 $item->type = 'zip';
618 } else {
619 $item->type = 'file';
620 }
dafe1296
DM
621 $itemurl = moodle_url::make_draftfile_url($draftitemid, $item->filepath, $item->filename);
622 $item->url = $itemurl->out();
559276b1
MG
623 $item->icon = $OUTPUT->pix_url(file_file_icon($file, 24))->out(false);
624 $item->thumbnail = $OUTPUT->pix_url(file_file_icon($file, 90))->out(false);
dafe1296 625 if ($imageinfo = $file->get_imageinfo()) {
3333e7e2
DM
626 $item->realthumbnail = $itemurl->out(false, array('preview' => 'thumb', 'oid' => $file->get_timemodified()));
627 $item->realicon = $itemurl->out(false, array('preview' => 'tinyicon', 'oid' => $file->get_timemodified()));
dafe1296
DM
628 $item->image_width = $imageinfo['width'];
629 $item->image_height = $imageinfo['height'];
630 }
f0e5f031 631 }
632 $list[] = $item;
633 }
634 }
635 $data->itemid = $draftitemid;
636 $data->list = $list;
637 return $data;
638}
639
3156b8ca 640/**
edc0c493 641 * Returns draft area itemid for a given element.
ba21c9d4 642 *
d2b7803e 643 * @category files
edc0c493 644 * @param string $elname name of formlib editor element, or a hidden form field that stores the draft area item id, etc.
d2b7803e 645 * @return int the itemid, or 0 if there is not one yet.
3156b8ca 646 */
edc0c493 647function file_get_submitted_draft_itemid($elname) {
18bd7573
PS
648 // this is a nasty hack, ideally all new elements should use arrays here or there should be a new parameter
649 if (!isset($_REQUEST[$elname])) {
650 return 0;
edc0c493 651 }
18bd7573
PS
652 if (is_array($_REQUEST[$elname])) {
653 $param = optional_param_array($elname, 0, PARAM_INT);
56a7bf68 654 if (!empty($param['itemid'])) {
655 $param = $param['itemid'];
656 } else {
657 debugging('Missing itemid, maybe caused by unset maxfiles option', DEBUG_DEVELOPER);
658 return false;
659 }
18bd7573
PS
660
661 } else {
662 $param = optional_param($elname, 0, PARAM_INT);
3156b8ca 663 }
18bd7573
PS
664
665 if ($param) {
666 require_sesskey();
667 }
668
edc0c493 669 return $param;
3156b8ca 670}
671
67233725
DC
672/**
673 * Restore the original source field from draft files
674 *
675 * @param stored_file $storedfile This only works with draft files
676 * @return stored_file
677 */
678function file_restore_source_field_from_draft_file($storedfile) {
679 $source = unserialize($storedfile->get_source());
61506a0a
DC
680 if (!empty($source)) {
681 if (is_object($source)) {
682 $restoredsource = $source->source;
683 $storedfile->set_source($restoredsource);
684 } else {
685 throw new moodle_exception('invalidsourcefield', 'error');
686 }
67233725
DC
687 }
688 return $storedfile;
689}
b933a139 690/**
edc0c493 691 * Saves files from a draft file area to a real one (merging the list of files).
692 * Can rewrite URLs in some content at the same time if desired.
ba21c9d4 693 *
d2b7803e
DC
694 * @category files
695 * @global stdClass $USER
696 * @param int $draftitemid the id of the draft area to use. Normally obtained
edc0c493 697 * from file_get_submitted_draft_itemid('elementname') or similar.
d2b7803e 698 * @param int $contextid This parameter and the next two identify the file area to save to.
64f93798 699 * @param string $component
a08171c5 700 * @param string $filearea indentifies the file area.
d2b7803e 701 * @param int $itemid helps identifies the file area.
ba21c9d4 702 * @param array $options area options (subdirs=>false, maxfiles=-1, maxbytes=0)
edc0c493 703 * @param string $text some html content that needs to have embedded links rewritten
704 * to the @@PLUGINFILE@@ form for saving in the database.
d2b7803e
DC
705 * @param bool $forcehttps force https urls.
706 * @return string|null if $text was passed in, the rewritten $text is returned. Otherwise NULL.
b933a139 707 */
64f93798 708function file_save_draft_area_files($draftitemid, $contextid, $component, $filearea, $itemid, array $options=null, $text=null, $forcehttps=false) {
c08643da 709 global $USER;
b933a139 710
711 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
8546def3 712 $fs = get_file_storage();
b933a139 713
a08171c5 714 $options = (array)$options;
715 if (!isset($options['subdirs'])) {
716 $options['subdirs'] = false;
717 }
718 if (!isset($options['maxfiles'])) {
719 $options['maxfiles'] = -1; // unlimited
720 }
721 if (!isset($options['maxbytes'])) {
722 $options['maxbytes'] = 0; // unlimited
723 }
724
64f93798
PS
725 $draftfiles = $fs->get_area_files($usercontext->id, 'user', 'draft', $draftitemid, 'id');
726 $oldfiles = $fs->get_area_files($contextid, $component, $filearea, $itemid, 'id');
b933a139 727
728 if (count($draftfiles) < 2) {
729 // means there are no files - one file means root dir only ;-)
64f93798 730 $fs->delete_area_files($contextid, $component, $filearea, $itemid);
b933a139 731
732 } else if (count($oldfiles) < 2) {
a08171c5 733 $filecount = 0;
b933a139 734 // there were no files before - one file means root dir only ;-)
64f93798 735 $file_record = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid);
b933a139 736 foreach ($draftfiles as $file) {
a08171c5 737 if (!$options['subdirs']) {
738 if ($file->get_filepath() !== '/' or $file->is_directory()) {
739 continue;
740 }
741 }
742 if ($options['maxbytes'] and $options['maxbytes'] < $file->get_filesize()) {
743 // oversized file - should not get here at all
b5b188ce 744 continue;
745 }
a08171c5 746 if ($options['maxfiles'] != -1 and $options['maxfiles'] <= $filecount) {
747 // more files - should not get here at all
748 break;
749 }
750 if (!$file->is_directory()) {
751 $filecount++;
752 }
67233725
DC
753
754 if ($file->is_external_file()) {
755 $repoid = $file->get_repository_id();
756 if (!empty($repoid)) {
757 $file_record['repositoryid'] = $repoid;
758 $file_record['reference'] = $file->get_reference();
759 }
760 }
761 file_restore_source_field_from_draft_file($file);
762
b933a139 763 $fs->create_file_from_storedfile($file_record, $file);
764 }
765
766 } else {
767 // we have to merge old and new files - we want to keep file ids for files that were not changed
656e1184
PS
768 // we change time modified for all new and changed files, we keep time created as is
769 $file_record = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'timemodified'=>time());
a08171c5 770
771 $newhashes = array();
b933a139 772 foreach ($draftfiles as $file) {
64f93798 773 $newhash = $fs->get_pathname_hash($contextid, $component, $filearea, $itemid, $file->get_filepath(), $file->get_filename());
a08171c5 774 $newhashes[$newhash] = $file;
775 }
776 $filecount = 0;
656e1184
PS
777 foreach ($oldfiles as $oldfile) {
778 $oldhash = $oldfile->get_pathnamehash();
779 if (!isset($newhashes[$oldhash])) {
64f93798 780 // delete files not needed any more - deleted by user
656e1184
PS
781 $oldfile->delete();
782 continue;
783 }
67233725 784
656e1184 785 $newfile = $newhashes[$oldhash];
67233725
DC
786 // status changed, we delete old file, and create a new one
787 if ($oldfile->get_status() != $newfile->get_status()) {
656e1184
PS
788 // file was changed, use updated with new timemodified data
789 $oldfile->delete();
67233725 790 // This file will be added later
656e1184
PS
791 continue;
792 }
67233725
DC
793
794 file_restore_source_field_from_draft_file($newfile);
795 // Replaced file content
796 if ($oldfile->get_contenthash() != $newfile->get_contenthash()) {
797 $oldfile->replace_content_with($newfile);
798 }
799 // Updated author
800 if ($oldfile->get_author() != $newfile->get_author()) {
801 $oldfile->set_author($newfile->get_author());
802 }
803 // Updated license
804 if ($oldfile->get_license() != $newfile->get_license()) {
805 $oldfile->set_license($newfile->get_license());
806 }
807
808 // Updated file source
809 if ($oldfile->get_source() != $newfile->get_source()) {
810 $oldfile->set_source($newfile->get_source());
811 }
812
813 // Updated sort order
814 if ($oldfile->get_sortorder() != $newfile->get_sortorder()) {
815 $oldfile->set_sortorder($newfile->get_sortorder());
816 }
817
61506a0a
DC
818 // Update file size
819 if ($oldfile->get_filesize() != $newfile->get_filesize()) {
820 $oldfile->set_filesize($newfile->get_filesize());
821 }
822
f653c9d8
DM
823 // Update file timemodified
824 if ($oldfile->get_timemodified() != $newfile->get_timemodified()) {
825 $oldfile->set_timemodified($newfile->get_timemodified());
826 }
827
656e1184
PS
828 // unchanged file or directory - we keep it as is
829 unset($newhashes[$oldhash]);
d9ba4bd6 830 if (!$oldfile->is_directory()) {
656e1184 831 $filecount++;
b933a139 832 }
b933a139 833 }
a08171c5 834
67233725 835 // Add fresh file or the file which has changed status
656e1184 836 // the size and subdirectory tests are extra safety only, the UI should prevent it
a08171c5 837 foreach ($newhashes as $file) {
838 if (!$options['subdirs']) {
839 if ($file->get_filepath() !== '/' or $file->is_directory()) {
840 continue;
841 }
842 }
843 if ($options['maxbytes'] and $options['maxbytes'] < $file->get_filesize()) {
844 // oversized file - should not get here at all
845 continue;
846 }
847 if ($options['maxfiles'] != -1 and $options['maxfiles'] <= $filecount) {
848 // more files - should not get here at all
849 break;
850 }
851 if (!$file->is_directory()) {
852 $filecount++;
853 }
67233725
DC
854
855 if ($file->is_external_file()) {
856 $repoid = $file->get_repository_id();
857 if (!empty($repoid)) {
858 $file_record['repositoryid'] = $repoid;
859 $file_record['reference'] = $file->get_reference();
860 }
861 }
862
a08171c5 863 $fs->create_file_from_storedfile($file_record, $file);
8546def3 864 }
865 }
866
64f93798 867 // note: do not purge the draft area - we clean up areas later in cron,
42776c94
PS
868 // the reason is that user might press submit twice and they would loose the files,
869 // also sometimes we might want to use hacks that save files into two different areas
b933a139 870
8546def3 871 if (is_null($text)) {
872 return null;
c08643da
TH
873 } else {
874 return file_rewrite_urls_to_pluginfile($text, $draftitemid, $forcehttps);
8546def3 875 }
c08643da
TH
876}
877
878/**
879 * Convert the draft file area URLs in some content to @@PLUGINFILE@@ tokens
880 * ready to be saved in the database. Normally, this is done automatically by
881 * {@link file_save_draft_area_files()}.
d2b7803e
DC
882 *
883 * @category files
c08643da
TH
884 * @param string $text the content to process.
885 * @param int $draftitemid the draft file area the content was using.
886 * @param bool $forcehttps whether the content contains https URLs. Default false.
887 * @return string the processed content.
888 */
889function file_rewrite_urls_to_pluginfile($text, $draftitemid, $forcehttps = false) {
890 global $CFG, $USER;
891
892 $usercontext = get_context_instance(CONTEXT_USER, $USER->id);
8546def3 893
9337cf32
PS
894 $wwwroot = $CFG->wwwroot;
895 if ($forcehttps) {
896 $wwwroot = str_replace('http://', 'https://', $wwwroot);
7983d682 897 }
898
9337cf32
PS
899 // relink embedded files if text submitted - no absolute links allowed in database!
900 $text = str_ireplace("$wwwroot/draftfile.php/$usercontext->id/user/draft/$draftitemid/", '@@PLUGINFILE@@/', $text);
901
902 if (strpos($text, 'draftfile.php?file=') !== false) {
903 $matches = array();
904 preg_match_all("!$wwwroot/draftfile.php\?file=%2F{$usercontext->id}%2Fuser%2Fdraft%2F{$draftitemid}%2F[^'\",&<>|`\s:\\\\]+!iu", $text, $matches);
905 if ($matches) {
906 foreach ($matches[0] as $match) {
907 $replace = str_ireplace('%2F', '/', $match);
908 $text = str_replace($match, $replace, $text);
909 }
910 }
911 $text = str_ireplace("$wwwroot/draftfile.php?file=/$usercontext->id/user/draft/$draftitemid/", '@@PLUGINFILE@@/', $text);
7983d682 912 }
913
7983d682 914 return $text;
915}
916
f79321f1
DC
917/**
918 * Set file sort order
d2b7803e
DC
919 *
920 * @global moodle_database $DB
921 * @param int $contextid the context id
922 * @param string $component file component
f79321f1 923 * @param string $filearea file area.
d2b7803e 924 * @param int $itemid itemid.
f79321f1
DC
925 * @param string $filepath file path.
926 * @param string $filename file name.
d2b7803e
DC
927 * @param int $sortorder the sort order of file.
928 * @return bool
f79321f1 929 */
64f93798 930function file_set_sortorder($contextid, $component, $filearea, $itemid, $filepath, $filename, $sortorder) {
f79321f1 931 global $DB;
64f93798 932 $conditions = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>$filepath, 'filename'=>$filename);
f79321f1
DC
933 if ($file_record = $DB->get_record('files', $conditions)) {
934 $sortorder = (int)$sortorder;
935 $file_record->sortorder = $sortorder;
936 $DB->update_record('files', $file_record);
937 return true;
938 }
939 return false;
940}
941
942/**
943 * reset file sort order number to 0
d2b7803e
DC
944 * @global moodle_database $DB
945 * @param int $contextid the context id
64f93798 946 * @param string $component
f79321f1 947 * @param string $filearea file area.
d2b7803e
DC
948 * @param int|bool $itemid itemid.
949 * @return bool
f79321f1 950 */
64f93798 951function file_reset_sortorder($contextid, $component, $filearea, $itemid=false) {
f79321f1
DC
952 global $DB;
953
64f93798 954 $conditions = array('contextid'=>$contextid, 'component'=>$component, 'filearea'=>$filearea);
f79321f1
DC
955 if ($itemid !== false) {
956 $conditions['itemid'] = $itemid;
957 }
958
959 $file_records = $DB->get_records('files', $conditions);
960 foreach ($file_records as $file_record) {
961 $file_record->sortorder = 0;
962 $DB->update_record('files', $file_record);
963 }
964 return true;
965}
966
a83ad946 967/**
968 * Returns description of upload error
ba21c9d4 969 *
a83ad946 970 * @param int $errorcode found in $_FILES['filename.ext']['error']
ba21c9d4 971 * @return string error description string, '' if ok
a83ad946 972 */
973function file_get_upload_error($errorcode) {
a08171c5 974
a83ad946 975 switch ($errorcode) {
976 case 0: // UPLOAD_ERR_OK - no error
977 $errmessage = '';
978 break;
a08171c5 979
a83ad946 980 case 1: // UPLOAD_ERR_INI_SIZE
981 $errmessage = get_string('uploadserverlimit');
982 break;
a08171c5 983
a83ad946 984 case 2: // UPLOAD_ERR_FORM_SIZE
985 $errmessage = get_string('uploadformlimit');
986 break;
a08171c5 987
a83ad946 988 case 3: // UPLOAD_ERR_PARTIAL
989 $errmessage = get_string('uploadpartialfile');
990 break;
a08171c5 991
a83ad946 992 case 4: // UPLOAD_ERR_NO_FILE
993 $errmessage = get_string('uploadnofilefound');
994 break;
a08171c5 995
a83ad946 996 // Note: there is no error with a value of 5
997
998 case 6: // UPLOAD_ERR_NO_TMP_DIR
999 $errmessage = get_string('uploadnotempdir');
1000 break;
1001
1002 case 7: // UPLOAD_ERR_CANT_WRITE
1003 $errmessage = get_string('uploadcantwrite');
1004 break;
1005
1006 case 8: // UPLOAD_ERR_EXTENSION
1007 $errmessage = get_string('uploadextension');
1008 break;
1009
1010 default:
1011 $errmessage = get_string('uploadproblem');
1012 }
1013
1014 return $errmessage;
1015}
1016
5db608f4 1017/**
1018 * Recursive function formating an array in POST parameter
1019 * @param array $arraydata - the array that we are going to format and add into &$data array
1020 * @param string $currentdata - a row of the final postdata array at instant T
1021 * when finish, it's assign to $data under this format: name[keyname][][]...[]='value'
1022 * @param array $data - the final data array containing all POST parameters : 1 row = 1 parameter
1023 */
1024function format_array_postdata_for_curlcall($arraydata, $currentdata, &$data) {
1025 foreach ($arraydata as $k=>$v) {
277c7a40 1026 $newcurrentdata = $currentdata;
5db608f4 1027 if (is_array($v)) { //the value is an array, call the function recursively
277c7a40 1028 $newcurrentdata = $newcurrentdata.'['.urlencode($k).']';
1029 format_array_postdata_for_curlcall($v, $newcurrentdata, $data);
5db608f4 1030 } else { //add the POST parameter to the $data array
277c7a40 1031 $data[] = $newcurrentdata.'['.urlencode($k).']='.urlencode($v);
5db608f4 1032 }
1033 }
1034}
1035
1036/**
1037 * Transform a PHP array into POST parameter
1038 * (see the recursive function format_array_postdata_for_curlcall)
1039 * @param array $postdata
1040 * @return array containing all POST parameters (1 row = 1 POST parameter)
1041 */
1042function format_postdata_for_curlcall($postdata) {
1043 $data = array();
1044 foreach ($postdata as $k=>$v) {
1045 if (is_array($v)) {
1046 $currentdata = urlencode($k);
1047 format_array_postdata_for_curlcall($v, $currentdata, $data);
1048 } else {
ea1780ad 1049 $data[] = urlencode($k).'='.urlencode($v);
5db608f4 1050 }
1051 }
1052 $convertedpostdata = implode('&', $data);
1053 return $convertedpostdata;
1054}
1055
8ee88311 1056/**
5f8bdc17 1057 * Fetches content of file from Internet (using proxy if defined). Uses cURL extension if present.
599f06cf 1058 * Due to security concerns only downloads from http(s) sources are supported.
1059 *
d2b7803e
DC
1060 * @todo MDL-31073 add version test for '7.10.5'
1061 * @category files
599f06cf 1062 * @param string $url file url starting with http(s)://
5ef082df 1063 * @param array $headers http headers, null if none. If set, should be an
1064 * associative array of header name => value pairs.
6bf55889 1065 * @param array $postdata array means use POST request with given parameters
1066 * @param bool $fullresponse return headers, responses, etc in a similar way snoopy does
5ef082df 1067 * (if false, just returns content)
1068 * @param int $timeout timeout for complete download process including all file transfer
44e02d79 1069 * (default 5 minutes)
1070 * @param int $connecttimeout timeout for connection to server; this is the timeout that
1071 * usually happens if the remote server is completely down (default 20 seconds);
1072 * may not work when using proxy
98eaf27e 1073 * @param bool $skipcertverify If true, the peer's SSL certificate will not be checked.
5f1c825d
SH
1074 * Only use this when already in a trusted location.
1075 * @param string $tofile store the downloaded content to file instead of returning it.
98eaf27e 1076 * @param bool $calctimeout false by default, true enables an extra head request to try and determine
5f1c825d
SH
1077 * filesize and appropriately larger timeout based on $CFG->curltimeoutkbitrate
1078 * @return mixed false if request failed or content of the file as string if ok. True if file downloaded into $tofile successfully.
8ee88311 1079 */
60b5a2fe 1080function download_file_content($url, $headers=null, $postdata=null, $fullresponse=false, $timeout=300, $connecttimeout=20, $skipcertverify=false, $tofile=NULL, $calctimeout=false) {
e27f0765 1081 global $CFG;
1082
599f06cf 1083 // some extra security
1084 $newlines = array("\r", "\n");
1085 if (is_array($headers) ) {
1086 foreach ($headers as $key => $value) {
1087 $headers[$key] = str_replace($newlines, '', $value);
1088 }
1089 }
1090 $url = str_replace($newlines, '', $url);
1091 if (!preg_match('|^https?://|i', $url)) {
1092 if ($fullresponse) {
365a5941 1093 $response = new stdClass();
599f06cf 1094 $response->status = 0;
1095 $response->headers = array();
1096 $response->response_code = 'Invalid protocol specified in url';
1097 $response->results = '';
1098 $response->error = 'Invalid protocol specified in url';
1099 return $response;
1100 } else {
1101 return false;
1102 }
1103 }
1104
bb2c046d 1105 // check if proxy (if used) should be bypassed for this url
aa944588 1106 $proxybypass = is_proxybypass($url);
1107
7fb90df0 1108 if (!$ch = curl_init($url)) {
1109 debugging('Can not init curl.');
1110 return false;
1111 }
599f06cf 1112
599f06cf 1113 // set extra headers
6bf55889 1114 if (is_array($headers) ) {
1115 $headers2 = array();
1116 foreach ($headers as $key => $value) {
6bf55889 1117 $headers2[] = "$key: $value";
1118 }
1119 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers2);
1120 }
1121
83947a36 1122 if ($skipcertverify) {
1123 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
1124 }
bb2c046d 1125
6bf55889 1126 // use POST if requested
1127 if (is_array($postdata)) {
5db608f4 1128 $postdata = format_postdata_for_curlcall($postdata);
6bf55889 1129 curl_setopt($ch, CURLOPT_POST, true);
1130 curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
5f8bdc17 1131 }
ea1780ad 1132
8ee88311 1133 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
3a1055a5 1134 curl_setopt($ch, CURLOPT_HEADER, false);
44e02d79 1135 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connecttimeout);
60b5a2fe 1136
6bf55889 1137 if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
599f06cf 1138 // TODO: add version test for '7.10.5'
6bf55889 1139 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
1140 curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
1141 }
1142
15c31560 1143 if (!empty($CFG->proxyhost) and !$proxybypass) {
5f8bdc17 1144 // SOCKS supported in PHP5 only
1145 if (!empty($CFG->proxytype) and ($CFG->proxytype == 'SOCKS5')) {
1146 if (defined('CURLPROXY_SOCKS5')) {
1147 curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
1148 } else {
5f8bdc17 1149 curl_close($ch);
599f06cf 1150 if ($fullresponse) {
365a5941 1151 $response = new stdClass();
599f06cf 1152 $response->status = '0';
1153 $response->headers = array();
1154 $response->response_code = 'SOCKS5 proxy is not supported in PHP4';
1155 $response->results = '';
1156 $response->error = 'SOCKS5 proxy is not supported in PHP4';
1157 return $response;
1158 } else {
1159 debugging("SOCKS5 proxy is not supported in PHP4.", DEBUG_ALL);
1160 return false;
1161 }
5f8bdc17 1162 }
1163 }
1164
08ec989f 1165 curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, false);
1166
8ee88311 1167 if (empty($CFG->proxyport)) {
e27f0765 1168 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost);
8ee88311 1169 } else {
e27f0765 1170 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport);
8ee88311 1171 }
5f8bdc17 1172
1173 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
8ee88311 1174 curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword);
5f8bdc17 1175 if (defined('CURLOPT_PROXYAUTH')) {
1176 // any proxy authentication if PHP 5.1
1177 curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
1178 }
8ee88311 1179 }
1180 }
6bf55889 1181
34ff25a6 1182 // set up header and content handlers
365a5941 1183 $received = new stdClass();
3a1055a5
PS
1184 $received->headers = array(); // received headers array
1185 $received->tofile = $tofile;
1186 $received->fh = null;
1187 curl_setopt($ch, CURLOPT_HEADERFUNCTION, partial('download_file_content_header_handler', $received));
1188 if ($tofile) {
1189 curl_setopt($ch, CURLOPT_WRITEFUNCTION, partial('download_file_content_write_handler', $received));
1190 }
1191
60b5a2fe
AB
1192 if (!isset($CFG->curltimeoutkbitrate)) {
1193 //use very slow rate of 56kbps as a timeout speed when not set
1194 $bitrate = 56;
1195 } else {
1196 $bitrate = $CFG->curltimeoutkbitrate;
1197 }
1198
5f1c825d
SH
1199 // try to calculate the proper amount for timeout from remote file size.
1200 // if disabled or zero, we won't do any checks nor head requests.
1201 if ($calctimeout && $bitrate > 0) {
60b5a2fe 1202 //setup header request only options
5f1c825d 1203 curl_setopt_array ($ch, array(
60b5a2fe 1204 CURLOPT_RETURNTRANSFER => false,
5f1c825d
SH
1205 CURLOPT_NOBODY => true)
1206 );
60b5a2fe
AB
1207
1208 curl_exec($ch);
1209 $info = curl_getinfo($ch);
1210 $err = curl_error($ch);
1211
1212 if ($err === '' && $info['download_content_length'] > 0) { //no curl errors
5f1c825d 1213 $timeout = max($timeout, ceil($info['download_content_length'] * 8 / ($bitrate * 1024))); //adjust for large files only - take max timeout.
60b5a2fe
AB
1214 }
1215 //reinstate affected curl options
5f1c825d 1216 curl_setopt_array ($ch, array(
60b5a2fe 1217 CURLOPT_RETURNTRANSFER => true,
5f1c825d
SH
1218 CURLOPT_NOBODY => false)
1219 );
60b5a2fe
AB
1220 }
1221
1222 curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
3a1055a5 1223 $result = curl_exec($ch);
08ec989f 1224
599f06cf 1225 // try to detect encoding problems
6bf55889 1226 if ((curl_errno($ch) == 23 or curl_errno($ch) == 61) and defined('CURLOPT_ENCODING')) {
1227 curl_setopt($ch, CURLOPT_ENCODING, 'none');
3a1055a5
PS
1228 $result = curl_exec($ch);
1229 }
1230
1231 if ($received->fh) {
1232 fclose($received->fh);
6bf55889 1233 }
1234
08ec989f 1235 if (curl_errno($ch)) {
6bf55889 1236 $error = curl_error($ch);
1237 $error_no = curl_errno($ch);
1238 curl_close($ch);
1239
1240 if ($fullresponse) {
365a5941 1241 $response = new stdClass();
6bf55889 1242 if ($error_no == 28) {
1243 $response->status = '-100'; // mimic snoopy
1244 } else {
1245 $response->status = '0';
1246 }
1247 $response->headers = array();
1248 $response->response_code = $error;
3a1055a5 1249 $response->results = false;
6bf55889 1250 $response->error = $error;
1251 return $response;
1252 } else {
599f06cf 1253 debugging("cURL request for \"$url\" failed with: $error ($error_no)", DEBUG_ALL);
6bf55889 1254 return false;
1255 }
5f8bdc17 1256
1257 } else {
6bf55889 1258 $info = curl_getinfo($ch);
1259 curl_close($ch);
599f06cf 1260
1261 if (empty($info['http_code'])) {
1262 // for security reasons we support only true http connections (Location: file:// exploit prevention)
365a5941 1263 $response = new stdClass();
599f06cf 1264 $response->status = '0';
1265 $response->headers = array();
1266 $response->response_code = 'Unknown cURL error';
3a1055a5 1267 $response->results = false; // do NOT change this, we really want to ignore the result!
599f06cf 1268 $response->error = 'Unknown cURL error';
1269
1270 } else {
365a5941 1271 $response = new stdClass();;
599f06cf 1272 $response->status = (string)$info['http_code'];
3a1055a5
PS
1273 $response->headers = $received->headers;
1274 $response->response_code = $received->headers[0];
1275 $response->results = $result;
599f06cf 1276 $response->error = '';
1277 }
6bf55889 1278
1279 if ($fullresponse) {
1280 return $response;
1281 } else if ($info['http_code'] != 200) {
599f06cf 1282 debugging("cURL request for \"$url\" failed, HTTP response code: ".$response->response_code, DEBUG_ALL);
6bf55889 1283 return false;
1284 } else {
1285 return $response->results;
5f8bdc17 1286 }
08ec989f 1287 }
8ee88311 1288}
1289
3a1055a5 1290/**
f36cb951 1291 * internal implementation
d2b7803e
DC
1292 * @param stdClass $received
1293 * @param resource $ch
1294 * @param mixed $header
1295 * @return int header length
3a1055a5
PS
1296 */
1297function download_file_content_header_handler($received, $ch, $header) {
1298 $received->headers[] = $header;
1299 return strlen($header);
1300}
1301
1302/**
f36cb951 1303 * internal implementation
d2b7803e
DC
1304 * @param stdClass $received
1305 * @param resource $ch
1306 * @param mixed $data
3a1055a5
PS
1307 */
1308function download_file_content_write_handler($received, $ch, $data) {
1309 if (!$received->fh) {
1310 $received->fh = fopen($received->tofile, 'w');
1311 if ($received->fh === false) {
1312 // bad luck, file creation or overriding failed
1313 return 0;
1314 }
1315 }
1316 if (fwrite($received->fh, $data) === false) {
1317 // bad luck, write failed, let's abort completely
1318 return 0;
1319 }
1320 return strlen($data);
1321}
1322
3ce73b14 1323/**
559276b1
MG
1324 * Returns a list of information about file types based on extensions.
1325 *
1326 * The following elements expected in value array for each extension:
1327 * 'type' - mimetype
1328 * 'icon' - location of the icon file. If value is FILENAME, then either pix/f/FILENAME.gif
1329 * or pix/f/FILENAME.png must be present in moodle and contain 16x16 filetype icon;
1330 * also files with bigger sizes under names
1331 * FILENAME-24, FILENAME-32, FILENAME-64, FILENAME-128, FILENAME-256 are recommended.
1332 * 'groups' (optional) - array of filetype groups this filetype extension is part of;
1333 * commonly used in moodle the following groups:
1334 * - web_image - image that can be included as <img> in HTML
1335 * - image - image that we can parse using GD to find it's dimensions, also used for portfolio format
1336 * - video - file that can be imported as video in text editor
1337 * - audio - file that can be imported as audio in text editor
1338 * - archive - we can extract files from this archive
1339 * - spreadsheet - used for portfolio format
1340 * - document - used for portfolio format
1341 * - presentation - used for portfolio format
1342 * 'string' (optional) - the name of the string from lang/en/mimetypes.php that displays
1343 * human-readable description for this filetype;
1344 * Function {@link get_mimetype_description()} first looks at the presence of string for
1345 * particular mimetype (value of 'type'), if not found looks for string specified in 'string'
1346 * attribute, if not found returns the value of 'type';
1347 * 'defaulticon' (boolean, optional) - used by function {@link file_mimetype_icon()} to find
1348 * an icon for mimetype. If an entry with 'defaulticon' is not found for a particular mimetype,
1349 * this function will return first found icon; Especially usefull for types such as 'text/plain'
d2b7803e
DC
1350 *
1351 * @category files
ba21c9d4 1352 * @return array List of information about file types based on extensions.
3ce73b14 1353 * Associative array of extension (lower-case) to associative array
1354 * from 'element name' to data. Current element names are 'type' and 'icon'.
76ca1ff1 1355 * Unknown types should use the 'xxx' entry which includes defaults.
3ce73b14 1356 */
559276b1 1357function &get_mimetypes_array() {
172dd12c 1358 static $mimearray = array (
ede72522 1359 'xxx' => array ('type'=>'document/unknown', 'icon'=>'unknown'),
0f1bdd0d
BR
1360 '3gp' => array ('type'=>'video/quicktime', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
1361 'aac' => array ('type'=>'audio/aac', 'icon'=>'mp3', 'groups'=>array('audio'), 'string'=>'audio'),
1362 'ai' => array ('type'=>'application/postscript', 'icon'=>'eps', 'groups'=>array('image'), 'string'=>'image'),
559276b1
MG
1363 'aif' => array ('type'=>'audio/x-aiff', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
1364 'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
1365 'aifc' => array ('type'=>'audio/x-aiff', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
ede72522
PS
1366 'applescript' => array ('type'=>'text/plain', 'icon'=>'text'),
1367 'asc' => array ('type'=>'text/plain', 'icon'=>'text'),
1368 'asm' => array ('type'=>'text/plain', 'icon'=>'text'),
559276b1
MG
1369 'au' => array ('type'=>'audio/au', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
1370 'avi' => array ('type'=>'video/x-ms-wm', 'icon'=>'avi', 'groups'=>array('video'), 'string'=>'video'),
0f1bdd0d 1371 'bmp' => array ('type'=>'image/bmp', 'icon'=>'bmp', 'groups'=>array('image'), 'string'=>'image'),
ede72522
PS
1372 'c' => array ('type'=>'text/plain', 'icon'=>'text'),
1373 'cct' => array ('type'=>'shockwave/director', 'icon'=>'flash'),
1374 'cpp' => array ('type'=>'text/plain', 'icon'=>'text'),
1375 'cs' => array ('type'=>'application/x-csh', 'icon'=>'text'),
559276b1 1376 'css' => array ('type'=>'text/css', 'icon'=>'text', 'groups'=>array('web_file')),
0f1bdd0d
BR
1377 'csv' => array ('type'=>'text/csv', 'icon'=>'xlsx', 'groups'=>array('spreadsheet')),
1378 'dv' => array ('type'=>'video/x-dv', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
ede72522
PS
1379 'dmg' => array ('type'=>'application/octet-stream', 'icon'=>'dmg'),
1380
0f1bdd0d 1381 'doc' => array ('type'=>'application/msword', 'icon'=>'docx', 'groups'=>array('document')),
559276b1 1382 'docx' => array ('type'=>'application/vnd.openxmlformats-officedocument.wordprocessingml.document', 'icon'=>'docx', 'groups'=>array('document')),
0f1bdd0d
BR
1383 'docm' => array ('type'=>'application/vnd.ms-word.document.macroEnabled.12', 'icon'=>'docx'),
1384 'dotx' => array ('type'=>'application/vnd.openxmlformats-officedocument.wordprocessingml.template', 'icon'=>'docx'),
1385 'dotm' => array ('type'=>'application/vnd.ms-word.template.macroEnabled.12', 'icon'=>'docx'),
ede72522
PS
1386
1387 'dcr' => array ('type'=>'application/x-director', 'icon'=>'flash'),
ca9875db 1388 'dif' => array ('type'=>'video/x-dv', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
ede72522
PS
1389 'dir' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1390 'dxr' => array ('type'=>'application/x-director', 'icon'=>'flash'),
0f1bdd0d 1391 'eps' => array ('type'=>'application/postscript', 'icon'=>'eps'),
ede72522 1392 'fdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
0f1bdd0d
BR
1393 'flv' => array ('type'=>'video/x-flv', 'icon'=>'flash', 'groups'=>array('video'), 'string'=>'video'),
1394 'f4v' => array ('type'=>'video/mp4', 'icon'=>'flash', 'groups'=>array('video'), 'string'=>'video'),
1395 'gif' => array ('type'=>'image/gif', 'icon'=>'gif', 'groups'=>array('image', 'web_image'), 'string'=>'image'),
559276b1
MG
1396 'gtar' => array ('type'=>'application/x-gtar', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
1397 'tgz' => array ('type'=>'application/g-zip', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
1398 'gz' => array ('type'=>'application/g-zip', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
1399 'gzip' => array ('type'=>'application/g-zip', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
ede72522
PS
1400 'h' => array ('type'=>'text/plain', 'icon'=>'text'),
1401 'hpp' => array ('type'=>'text/plain', 'icon'=>'text'),
559276b1 1402 'hqx' => array ('type'=>'application/mac-binhex40', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
0f1bdd0d 1403 'htc' => array ('type'=>'text/x-component', 'icon'=>'html'),
559276b1 1404 'html' => array ('type'=>'text/html', 'icon'=>'html', 'groups'=>array('web_file')),
ca9875db 1405 'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'html', 'groups'=>array('web_file')),
559276b1
MG
1406 'htm' => array ('type'=>'text/html', 'icon'=>'html', 'groups'=>array('web_file')),
1407 'ico' => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
ede72522
PS
1408 'ics' => array ('type'=>'text/calendar', 'icon'=>'text'),
1409 'isf' => array ('type'=>'application/inspiration', 'icon'=>'isf'),
1410 'ist' => array ('type'=>'application/inspiration.template', 'icon'=>'isf'),
1411 'java' => array ('type'=>'text/plain', 'icon'=>'text'),
ca9875db
MG
1412 'jcb' => array ('type'=>'text/xml', 'icon'=>'xml'),
1413 'jcl' => array ('type'=>'text/xml', 'icon'=>'xml'),
1414 'jcw' => array ('type'=>'text/xml', 'icon'=>'xml'),
1415 'jmt' => array ('type'=>'text/xml', 'icon'=>'xml'),
1416 'jmx' => array ('type'=>'text/xml', 'icon'=>'xml'),
a8d6dda4
MG
1417 'jpe' => array ('type'=>'image/jpeg', 'icon'=>'jpeg', 'groups'=>array('image', 'web_image'), 'string'=>'image'),
1418 'jpeg' => array ('type'=>'image/jpeg', 'icon'=>'jpeg', 'groups'=>array('image', 'web_image'), 'string'=>'image'),
1419 'jpg' => array ('type'=>'image/jpeg', 'icon'=>'jpeg', 'groups'=>array('image', 'web_image'), 'string'=>'image'),
1420 'jqz' => array ('type'=>'text/xml', 'icon'=>'xml'),
559276b1 1421 'js' => array ('type'=>'application/x-javascript', 'icon'=>'text', 'groups'=>array('web_file')),
ede72522
PS
1422 'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text'),
1423 'm' => array ('type'=>'text/plain', 'icon'=>'text'),
b3ea9cb2 1424 'mbz' => array ('type'=>'application/vnd.moodle.backup', 'icon'=>'moodle'),
a8d6dda4
MG
1425 'mov' => array ('type'=>'video/quicktime', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
1426 'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
1427 'm3u' => array ('type'=>'audio/x-mpegurl', 'icon'=>'mp3', 'groups'=>array('audio'), 'string'=>'audio'),
1428 'mp3' => array ('type'=>'audio/mp3', 'icon'=>'mp3', 'groups'=>array('audio'), 'string'=>'audio'),
1429 'mp4' => array ('type'=>'video/mp4', 'icon'=>'mpeg', 'groups'=>array('video'), 'string'=>'video'),
1430 'm4v' => array ('type'=>'video/mp4', 'icon'=>'mpeg', 'groups'=>array('video'), 'string'=>'video'),
1431 'm4a' => array ('type'=>'audio/mp4', 'icon'=>'mp3', 'groups'=>array('audio'), 'string'=>'audio'),
1432 'mpeg' => array ('type'=>'video/mpeg', 'icon'=>'mpeg', 'groups'=>array('video'), 'string'=>'video'),
1433 'mpe' => array ('type'=>'video/mpeg', 'icon'=>'mpeg', 'groups'=>array('video'), 'string'=>'video'),
1434 'mpg' => array ('type'=>'video/mpeg', 'icon'=>'mpeg', 'groups'=>array('video'), 'string'=>'video'),
0f1bdd0d 1435
ca9875db
MG
1436 'odt' => array ('type'=>'application/vnd.oasis.opendocument.text', 'icon'=>'odt', 'groups'=>array('document')),
1437 'ott' => array ('type'=>'application/vnd.oasis.opendocument.text-template', 'icon'=>'odt', 'groups'=>array('document')),
1438 'oth' => array ('type'=>'application/vnd.oasis.opendocument.text-web', 'icon'=>'oth', 'groups'=>array('document')),
1439 'odm' => array ('type'=>'application/vnd.oasis.opendocument.text-master', 'icon'=>'odt'),
ede72522
PS
1440 'odg' => array ('type'=>'application/vnd.oasis.opendocument.graphics', 'icon'=>'odg'),
1441 'otg' => array ('type'=>'application/vnd.oasis.opendocument.graphics-template', 'icon'=>'odg'),
1442 'odp' => array ('type'=>'application/vnd.oasis.opendocument.presentation', 'icon'=>'odp'),
1443 'otp' => array ('type'=>'application/vnd.oasis.opendocument.presentation-template', 'icon'=>'odp'),
559276b1
MG
1444 'ods' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet', 'icon'=>'ods', 'groups'=>array('spreadsheet')),
1445 'ots' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet-template', 'icon'=>'ods', 'groups'=>array('spreadsheet')),
ede72522
PS
1446 'odc' => array ('type'=>'application/vnd.oasis.opendocument.chart', 'icon'=>'odc'),
1447 'odf' => array ('type'=>'application/vnd.oasis.opendocument.formula', 'icon'=>'odf'),
1448 'odb' => array ('type'=>'application/vnd.oasis.opendocument.database', 'icon'=>'odb'),
0f1bdd0d
BR
1449 'odi' => array ('type'=>'application/vnd.oasis.opendocument.image', 'icon'=>'odg'),
1450 'oga' => array ('type'=>'audio/ogg', 'icon'=>'wma', 'groups'=>array('audio'), 'string'=>'audio'),
1451 'ogg' => array ('type'=>'audio/ogg', 'icon'=>'wma', 'groups'=>array('audio'), 'string'=>'audio'),
1452 'ogv' => array ('type'=>'video/ogg', 'icon'=>'wmv', 'groups'=>array('video'), 'string'=>'video'),
ede72522 1453
559276b1 1454 'pct' => array ('type'=>'image/pict', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
ede72522
PS
1455 'pdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1456 'php' => array ('type'=>'text/plain', 'icon'=>'text'),
559276b1
MG
1457 'pic' => array ('type'=>'image/pict', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
1458 'pict' => array ('type'=>'image/pict', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
0f1bdd0d 1459 'png' => array ('type'=>'image/png', 'icon'=>'png', 'groups'=>array('image', 'web_image'), 'string'=>'image'),
ede72522 1460
0f1bdd0d
BR
1461 'pps' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptx', 'groups'=>array('presentation')),
1462 'ppt' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptx', 'groups'=>array('presentation')),
ede72522 1463 'pptx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.presentation', 'icon'=>'pptx'),
0f1bdd0d
BR
1464 'pptm' => array ('type'=>'application/vnd.ms-powerpoint.presentation.macroEnabled.12', 'icon'=>'pptx'),
1465 'potx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.template', 'icon'=>'pptx'),
1466 'potm' => array ('type'=>'application/vnd.ms-powerpoint.template.macroEnabled.12', 'icon'=>'pptx'),
1467 'ppam' => array ('type'=>'application/vnd.ms-powerpoint.addin.macroEnabled.12', 'icon'=>'pptx'),
1468 'ppsx' => array ('type'=>'application/vnd.openxmlformats-officedocument.presentationml.slideshow', 'icon'=>'pptx'),
1469 'ppsm' => array ('type'=>'application/vnd.ms-powerpoint.slideshow.macroEnabled.12', 'icon'=>'pptx'),
ede72522
PS
1470
1471 'ps' => array ('type'=>'application/postscript', 'icon'=>'pdf'),
0f1bdd0d 1472 'qt' => array ('type'=>'video/quicktime', 'icon'=>'mov', 'groups'=>array('video'), 'string'=>'video'),
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1473 'ra' => array ('type'=>'audio/x-realaudio-plugin', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
1474 'ram' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
ede72522 1475 'rhb' => array ('type'=>'text/xml', 'icon'=>'xml'),
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1476 'rm' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'audio', 'groups'=>array('audio'), 'string'=>'audio'),
1477 'rmvb' => array ('type'=>'application/vnd.rn-realmedia-vbr', 'icon'=>'video', 'groups'=>array('video'), 'string'=>'video'),
1478 'rtf' => array ('type'=>'text/rtf', 'icon'=>'text', 'groups'=>array('document')),
ede72522 1479 'rtx' => array ('type'=>'text/richtext', 'icon'=>'text'),
0f1bdd0d 1480 'rv' => array ('type'=>'audio/x-pn-realaudio-plugin', 'icon'=>'audio', 'groups'=>array('video'), 'string'=>'video'),
ede72522 1481 'sh' => array ('type'=>'application/x-sh', 'icon'=>'text'),
559276b1 1482 'sit' => array ('type'=>'application/x-stuffit', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
ede72522
PS
1483 'smi' => array ('type'=>'application/smil', 'icon'=>'text'),
1484 'smil' => array ('type'=>'application/smil', 'icon'=>'text'),
1485 'sqt' => array ('type'=>'text/xml', 'icon'=>'xml'),
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1486 'svg' => array ('type'=>'image/svg+xml', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
1487 'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image', 'groups'=>array('image'), 'string'=>'image'),
ede72522
PS
1488 'swa' => array ('type'=>'application/x-director', 'icon'=>'flash'),
1489 'swf' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash'),
1490 'swfl' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash'),
1491
1492 'sxw' => array ('type'=>'application/vnd.sun.xml.writer', 'icon'=>'odt'),
1493 'stw' => array ('type'=>'application/vnd.sun.xml.writer.template', 'icon'=>'odt'),
0f1bdd0d
BR
1494 'sxc' => array ('type'=>'application/vnd.sun.xml.calc', 'icon'=>'ods'),
1495 'stc' => array ('type'=>'application/vnd.sun.xml.calc.template', 'icon'=>'ods'),
1496 'sxd' => array ('type'=>'application/vnd.sun.xml.draw', 'icon'=>'odg'),
1497 'std' => array ('type'=>'application/vnd.sun.xml.draw.template', 'icon'=>'odg'),
1498 'sxi' => array ('type'=>'application/vnd.sun.xml.impress', 'icon'=>'odp'),
1499 'sti' => array ('type'=>'application/vnd.sun.xml.impress.template', 'icon'=>'odp'),
ede72522 1500 'sxg' => array ('type'=>'application/vnd.sun.xml.writer.global', 'icon'=>'odt'),
0f1bdd0d 1501 'sxm' => array ('type'=>'application/vnd.sun.xml.math', 'icon'=>'odf'),
ede72522 1502
559276b1 1503 'tar' => array ('type'=>'application/x-tar', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive'),
0f1bdd0d
BR
1504 'tif' => array ('type'=>'image/tiff', 'icon'=>'tiff', 'groups'=>array('image'), 'string'=>'image'),
1505 'tiff' => array ('type'=>'image/tiff', 'icon'=>'tiff', 'groups'=>array('image'), 'string'=>'image'),
ede72522
PS
1506 'tex' => array ('type'=>'application/x-tex', 'icon'=>'text'),
1507 'texi' => array ('type'=>'application/x-texinfo', 'icon'=>'text'),
1508 'texinfo' => array ('type'=>'application/x-texinfo', 'icon'=>'text'),
1509 'tsv' => array ('type'=>'text/tab-separated-values', 'icon'=>'text'),
559276b1 1510 'txt' => array ('type'=>'text/plain', 'icon'=>'text', 'defaulticon'=>true),
0f1bdd0d
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1511 'wav' => array ('type'=>'audio/wav', 'icon'=>'wav', 'groups'=>array('audio'), 'string'=>'audio'),
1512 'webm' => array ('type'=>'video/webm', 'icon'=>'wmv', 'groups'=>array('video'), 'string'=>'video'),
1513 'wmv' => array ('type'=>'video/x-ms-wmv', 'icon'=>'wmv', 'groups'=>array('video'), 'string'=>'video'),
1514 'asf' => array ('type'=>'video/x-ms-asf', 'icon'=>'wmv', 'groups'=>array('video'), 'string'=>'video'),
ede72522
PS
1515 'xdp' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1516 'xfd' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1517 'xfdf' => array ('type'=>'application/pdf', 'icon'=>'pdf'),
1518
0f1bdd0d 1519 'xls' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsx', 'groups'=>array('spreadsheet')),
ede72522 1520 'xlsx' => array ('type'=>'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', 'icon'=>'xlsx'),
0f1bdd0d
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1521 'xlsm' => array ('type'=>'application/vnd.ms-excel.sheet.macroEnabled.12', 'icon'=>'xlsx', 'groups'=>array('spreadsheet')),
1522 'xltx' => array ('type'=>'application/vnd.openxmlformats-officedocument.spreadsheetml.template', 'icon'=>'xlsx'),
1523 'xltm' => array ('type'=>'application/vnd.ms-excel.template.macroEnabled.12', 'icon'=>'xlsx'),
1524 'xlsb' => array ('type'=>'application/vnd.ms-excel.sheet.binary.macroEnabled.12', 'icon'=>'xlsx'),
1525 'xlam' => array ('type'=>'application/vnd.ms-excel.addin.macroEnabled.12', 'icon'=>'xlsx'),
ede72522
PS
1526
1527 'xml' => array ('type'=>'application/xml', 'icon'=>'xml'),
1528 'xsl' => array ('type'=>'text/xml', 'icon'=>'xml'),
559276b1 1529 'zip' => array ('type'=>'application/zip', 'icon'=>'zip', 'groups'=>array('archive'), 'string'=>'archive')
f1e0649c 1530 );
172dd12c 1531 return $mimearray;
3ce73b14 1532}
1533
76ca1ff1 1534/**
3ce73b14 1535 * Obtains information about a filetype based on its extension. Will
1536 * use a default if no information is present about that particular
1537 * extension.
ba21c9d4 1538 *
d2b7803e 1539 * @category files
76ca1ff1 1540 * @param string $element Desired information (usually 'icon'
559276b1
MG
1541 * for icon filename or 'type' for MIME type. Can also be
1542 * 'icon24', ...32, 48, 64, 72, 80, 96, 128, 256)
76ca1ff1 1543 * @param string $filename Filename we're looking up
3ce73b14 1544 * @return string Requested piece of information from array
1545 */
1546function mimeinfo($element, $filename) {
0ef98843 1547 global $CFG;
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MG
1548 $mimeinfo = & get_mimetypes_array();
1549 static $iconpostfixes = array(256=>'-256', 128=>'-128', 96=>'-96', 80=>'-80', 72=>'-72', 64=>'-64', 48=>'-48', 32=>'-32', 24=>'-24', 16=>'');
1550
1551 $filetype = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
1552 if (empty($filetype)) {
1553 $filetype = 'xxx'; // file without extension
1554 }
1555 if (preg_match('/^icon(\d*)$/', $element, $iconsizematch)) {
1556 $iconsize = max(array(16, (int)$iconsizematch[1]));
1557 $filenames = array($mimeinfo['xxx']['icon']);
1558 if ($filetype != 'xxx' && isset($mimeinfo[$filetype]['icon'])) {
1559 array_unshift($filenames, $mimeinfo[$filetype]['icon']);
1560 }
1561 // find the file with the closest size, first search for specific icon then for default icon
1562 foreach ($filenames as $filename) {
1563 foreach ($iconpostfixes as $size => $postfix) {
1564 $fullname = $CFG->dirroot.'/pix/f/'.$filename.$postfix;
1565 if ($iconsize >= $size && (file_exists($fullname.'.png') || file_exists($fullname.'.gif'))) {
1566 return $filename.$postfix;
72aa74ce 1567 }
0ef98843 1568 }
f1e0649c 1569 }
559276b1
MG
1570 } else if (isset($mimeinfo[$filetype][$element])) {
1571 return $mimeinfo[$filetype][$element];
1572 } else if (isset($mimeinfo['xxx'][$element])) {
a370c895 1573 return $mimeinfo['xxx'][$element]; // By default
559276b1
MG
1574 } else {
1575 return null;
f1e0649c 1576 }
1577}
1578
76ca1ff1 1579/**
3ce73b14 1580 * Obtains information about a filetype based on the MIME type rather than
1581 * the other way around.
ba21c9d4 1582 *
d2b7803e 1583 * @category files
559276b1 1584 * @param string $element Desired information ('extension', 'icon', 'icon-24', etc.)
76ca1ff1 1585 * @param string $mimetype MIME type we're looking up
3ce73b14 1586 * @return string Requested piece of information from array
1587 */
1588function mimeinfo_from_type($element, $mimetype) {
559276b1
MG
1589 /* array of cached mimetype->extension associations */
1590 static $cached = array();
1591 $mimeinfo = & get_mimetypes_array();
1592
1593 if (!array_key_exists($mimetype, $cached)) {
1594 $cached[$mimetype] = null;
1595 foreach($mimeinfo as $filetype => $values) {
1596 if ($values['type'] == $mimetype) {
1597 if ($cached[$mimetype] === null) {
1598 $cached[$mimetype] = $filetype;
1599 }
1600 if (!empty($values['defaulticon'])) {
1601 $cached[$mimetype] = $filetype;
1602 break;
1603 }
3ce73b14 1604 }
3ce73b14 1605 }
a8d6dda4
MG
1606 if (empty($cached[$mimetype])) {
1607 $cached[$mimetype] = 'xxx';
559276b1 1608 }
a8d6dda4
MG
1609 }
1610 if ($element === 'extension') {
1611 return $cached[$mimetype];
559276b1 1612 } else {
a8d6dda4 1613 return mimeinfo($element, '.'.$cached[$mimetype]);
559276b1 1614 }
3ce73b14 1615}
b9709b76 1616
42ead7d7 1617/**
559276b1 1618 * Return the relative icon path for a given file
ba21c9d4 1619 *
559276b1
MG
1620 * Usage:
1621 * <code>
1622 * // $file - instance of stored_file or file_info
1623 * $icon = $OUTPUT->pix_url(file_file_icon($file))->out();
1624 * echo html_writer::empty_tag('img', array('src' => $icon, 'alt' => get_mimetype_description($file)));
1625 * </code>
1626 * or
1627 * <code>
1628 * echo $OUTPUT->pix_icon(file_file_icon($file), get_mimetype_description($file));
1629 * </code>
1630 *
1631 * @param stored_file|file_info|stdClass|array $file (in case of object attributes $file->filename
1632 * and $file->mimetype are expected)
1633 * @param int $size The size of the icon. Defaults to 16 can also be 24, 32, 64, 128, 256
1634 * @return string
42ead7d7 1635 */
559276b1
MG
1636function file_file_icon($file, $size = null) {
1637 if (!is_object($file)) {
1638 $file = (object)$file;
1639 }
1640 if (isset($file->filename)) {
1641 $filename = $file->filename;
1642 } else if (method_exists($file, 'get_filename')) {
1643 $filename = $file->get_filename();
1644 } else if (method_exists($file, 'get_visible_name')) {
1645 $filename = $file->get_visible_name();
1646 } else {
1647 $filename = '';
637a60dc 1648 }
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MG
1649 if (isset($file->mimetype)) {
1650 $mimetype = $file->mimetype;
1651 } else if (method_exists($file, 'get_mimetype')) {
1652 $mimetype = $file->get_mimetype();
1653 } else {
1654 $mimetype = '';
42ead7d7 1655 }
559276b1
MG
1656 if ($filename && pathinfo($filename, PATHINFO_EXTENSION) &&
1657 (!$mimetype || mimeinfo('type', $filename) === $mimetype)) {
1658 // files with different extensions sharing the same mimetype (i.e. 'text/plain') may have different icons
1659 return file_extension_icon($filename, $size);
1660 } else {
1661 // if mimetype and extension do not match we assume that mimetype is more correct
1662 return file_mimetype_icon($mimetype, $size);
0b46f19e 1663 }
559276b1 1664}
637a60dc 1665
559276b1
MG
1666/**
1667 * Return the relative icon path for a folder image
1668 *
1669 * Usage:
1670 * <code>
1671 * $icon = $OUTPUT->pix_url(file_folder_icon())->out();
1672 * echo html_writer::empty_tag('img', array('src' => $icon));
1673 * </code>
1674 * or
1675 * <code>
1676 * echo $OUTPUT->pix_icon(file_folder_icon(32));
1677 * </code>
1678 *
1679 * @param int $iconsize The size of the icon. Defaults to 16 can also be 24, 32, 48, 64, 72, 80, 96, 128, 256
1680 * @return string
1681 */
1682function file_folder_icon($iconsize = null) {
1683 global $CFG;
1684 static $iconpostfixes = array(256=>'-256', 128=>'-128', 96=>'-96', 80=>'-80', 72=>'-72', 64=>'-64', 48=>'-48', 32=>'-32', 24=>'-24', 16=>'');
1685 $iconsize = max(array(16, (int)$iconsize));
1686 foreach ($iconpostfixes as $size => $postfix) {
1687 $fullname = $CFG->dirroot.'/pix/f/folder'.$postfix;
1688 if ($iconsize >= $size && (file_exists($fullname.'.png') || file_exists($fullname.'.gif'))) {
1689 return 'f/folder'.$postfix;
1690 }
637a60dc 1691 }
42ead7d7 1692}
1693
9dffa7af 1694/**
1695 * Returns the relative icon path for a given mime type
1696 *
34ff25a6 1697 * This function should be used in conjunction with $OUTPUT->pix_url to produce
9dffa7af 1698 * a return the full path to an icon.
1699 *
1700 * <code>
1701 * $mimetype = 'image/jpg';
559276b1
MG
1702 * $icon = $OUTPUT->pix_url(file_mimetype_icon($mimetype))->out();
1703 * echo html_writer::empty_tag('img', array('src' => $icon, 'alt' => get_mimetype_description($mimetype)));
9dffa7af 1704 * </code>
1705 *
d2b7803e
DC
1706 * @category files
1707 * @todo MDL-31074 When an $OUTPUT->icon method is available this function should be altered
9dffa7af 1708 * to conform with that.
9dffa7af 1709 * @param string $mimetype The mimetype to fetch an icon for
559276b1 1710 * @param int $size The size of the icon. Defaults to 16 can also be 24, 32, 64, 128, 256
9dffa7af 1711 * @return string The relative path to the icon
1712 */
ede72522 1713function file_mimetype_icon($mimetype, $size = NULL) {
559276b1 1714 return 'f/'.mimeinfo_from_type('icon'.$size, $mimetype);
9dffa7af 1715}
1716
1717/**
2dcb7d0b 1718 * Returns the relative icon path for a given file name
9dffa7af 1719 *
34ff25a6 1720 * This function should be used in conjunction with $OUTPUT->pix_url to produce
9dffa7af 1721 * a return the full path to an icon.
1722 *
9dffa7af 1723 * <code>
559276b1
MG
1724 * $filename = '.jpg';
1725 * $icon = $OUTPUT->pix_url(file_extension_icon($filename))->out();
1726 * echo html_writer::empty_tag('img', array('src' => $icon, 'alt' => '...'));
9dffa7af 1727 * </code>
1728 *
d2b7803e 1729 * @todo MDL-31074 When an $OUTPUT->icon method is available this function should be altered
9dffa7af 1730 * to conform with that.
d2b7803e
DC
1731 * @todo MDL-31074 Implement $size
1732 * @category files
1733 * @param string $filename The filename to get the icon for
559276b1 1734 * @param int $size The size of the icon. Defaults to 16 can also be 24, 32, 64, 128, 256
9dffa7af 1735 * @return string
1736 */
ede72522 1737function file_extension_icon($filename, $size = NULL) {
559276b1 1738 return 'f/'.mimeinfo('icon'.$size, $filename);
9dffa7af 1739}
1740
c0381e22 1741/**
76ca1ff1 1742 * Obtains descriptions for file types (e.g. 'Microsoft Word document') from the
1743 * mimetypes.php language file.
ba21c9d4 1744 *
559276b1
MG
1745 * @param mixed $obj - instance of stored_file or file_info or array/stdClass with field
1746 * 'filename' and 'mimetype', or just a string with mimetype (though it is recommended to
1747 * have filename); In case of array/stdClass the field 'mimetype' is optional.
c0381e22 1748 * @param bool $capitalise If true, capitalises first character of result
76ca1ff1 1749 * @return string Text description
c0381e22 1750 */
559276b1
MG
1751function get_mimetype_description($obj, $capitalise=false) {
1752 if (is_object($obj) && method_exists($obj, 'get_filename') && method_exists($obj, 'get_mimetype')) {
1753 // this is an instance of stored_file
1754 $mimetype = $obj->get_mimetype();
1755 $filename = $obj->get_filename();
1756 } else if (is_object($obj) && method_exists($obj, 'get_visible_name') && method_exists($obj, 'get_mimetype')) {
1757 // this is an instance of file_info
1758 $mimetype = $obj->get_mimetype();
1759 $filename = $obj->get_visible_name();
1760 } else if (is_array($obj) || is_object ($obj)) {
1761 $obj = (array)$obj;
1762 if (!empty($obj['filename'])) {
1763 $filename = $obj['filename'];
1764 } else {
1765 $filename = '';
1766 }
1767 if (!empty($obj['mimetype'])) {
1768 $mimetype = $obj['mimetype'];
1769 } else {
1770 $mimetype = mimeinfo('type', $filename);
1771 }
1772 } else {
1773 $mimetype = $obj;
1774 $filename = '';
1775 }
1776 $extension = strtolower(pathinfo($filename, PATHINFO_EXTENSION));
1777 if (empty($extension)) {
1778 $mimetypestr = mimeinfo_from_type('string', $mimetype);
1779 $extension = mimeinfo_from_type('extension', $mimetype);
1780 } else {
1781 $mimetypestr = mimeinfo('string', $filename);
1782 }
1783 $chunks = explode('/', $mimetype, 2);
1784 $chunks[] = '';
1785 $attr = array(
1786 'mimetype' => $mimetype,
1787 'ext' => $extension,
1788 'mimetype1' => $chunks[0],
1789 'mimetype2' => $chunks[1],
1790 );
1791 $a = array();
1792 foreach ($attr as $key => $value) {
1793 $a[$key] = $value;
1794 $a[strtoupper($key)] = strtoupper($value);
1795 $a[ucfirst($key)] = ucfirst($value);
1796 }
1b80c913 1797 if (get_string_manager()->string_exists($mimetype, 'mimetypes')) {
559276b1
MG
1798 $result = get_string($mimetype, 'mimetypes', (object)$a);
1799 } else if (get_string_manager()->string_exists($mimetypestr, 'mimetypes')) {
1800 $result = get_string($mimetypestr, 'mimetypes', (object)$a);
1801 } else if (get_string_manager()->string_exists('default', 'mimetypes')) {
1802 $result = get_string('default', 'mimetypes', (object)$a);
1b80c913 1803 } else {
559276b1 1804 $result = $mimetype;
76ca1ff1 1805 }
ede72522 1806 if ($capitalise) {
c0381e22 1807 $result=ucfirst($result);
1808 }
1809 return $result;
1810}
1811
559276b1
MG
1812/**
1813 * Returns array of elements of type $element in type group(s)
1814 *
1815 * @param string $element name of the element we are interested in, usually 'type' or 'extension'
1816 * @param string|array $groups one group or array of groups/extensions/mimetypes
1817 * @return array
1818 */
1819function file_get_typegroup($element, $groups) {
1820 static $cached = array();
1821 if (!is_array($groups)) {
1822 $groups = array($groups);
1823 }
1824 if (!array_key_exists($element, $cached)) {
1825 $cached[$element] = array();
1826 }
1827 $result = array();
1828 foreach ($groups as $group) {
1829 if (!array_key_exists($group, $cached[$element])) {
1830 // retrieive and cache all elements of type $element for group $group
1831 $mimeinfo = & get_mimetypes_array();
1832 $cached[$element][$group] = array();
1833 foreach ($mimeinfo as $extension => $value) {
1834 $value['extension'] = $extension;
1835 if (empty($value[$element])) {
1836 continue;
1837 }
1838 if (($group === $extension || $group === $value['type'] ||
1839 (!empty($value['groups']) && in_array($group, $value['groups']))) &&
1840 !in_array($value[$element], $cached[$element][$group])) {
1841 $cached[$element][$group][] = $value[$element];
1842 }
1843 }
1844 }
1845 $result = array_merge($result, $cached[$element][$group]);
1846 }
1847 return array_unique($result);
1848}
1849
1850/**
1851 * Checks if file with name $filename has one of the extensions in groups $groups
1852 *
1853 * @see get_mimetypes_array()
1854 * @param string $filename name of the file to check
1855 * @param string|array $groups one group or array of groups to check
1856 * @param bool $checktype if true and extension check fails, find the mimetype and check if
1857 * file mimetype is in mimetypes in groups $groups
1858 * @return bool
1859 */
1860function file_extension_in_typegroup($filename, $groups, $checktype = false) {
1861 $extension = pathinfo($filename, PATHINFO_EXTENSION);
1862 if (!empty($extension) && in_array(strtolower($extension), file_get_typegroup('extension', $groups))) {
1863 return true;
1864 }
1865 return $checktype && file_mimetype_in_typegroup(mimeinfo('type', $filename), $groups);
1866}
1867
1868/**
1869 * Checks if mimetype $mimetype belongs to one of the groups $groups
1870 *
1871 * @see get_mimetypes_array()
1872 * @param string $mimetype
1873 * @param string|array $groups one group or array of groups to check
1874 * @return bool
1875 */
1876function file_mimetype_in_typegroup($mimetype, $groups) {
1877 return !empty($mimetype) && in_array($mimetype, file_get_typegroup('type', $groups));
1878}
1879
9e5fa330 1880/**
d2b7803e 1881 * Requested file is not found or not accessible, does not return, terminates script
ba21c9d4 1882 *
d2b7803e
DC
1883 * @global stdClass $CFG
1884 * @global stdClass $COURSE
9e5fa330 1885 */
1886function send_file_not_found() {
1887 global $CFG, $COURSE;
dbdc7355 1888 send_header_404();
9e5fa330 1889 print_error('filenotfound', 'error', $CFG->wwwroot.'/course/view.php?id='.$COURSE->id); //this is not displayed on IIS??
1890}
dbdc7355
DM
1891/**
1892 * Helper function to send correct 404 for server.
1893 */
1894function send_header_404() {
1895 if (substr(php_sapi_name(), 0, 3) == 'cgi') {
1896 header("Status: 404 Not Found");
1897 } else {
1898 header('HTTP/1.0 404 not found');
1899 }
1900}
9e5fa330 1901
cbad562e 1902/**
d5dd0540
PS
1903 * Enhanced readfile() with optional acceleration.
1904 * @param string|stored_file $file
1905 * @param string $mimetype
1906 * @param bool $accelerate
1907 * @return void
cbad562e 1908 */
d5dd0540
PS
1909function readfile_accel($file, $mimetype, $accelerate) {
1910 global $CFG;
1911
1912 if ($mimetype === 'text/plain') {
1913 // there is no encoding specified in text files, we need something consistent
1914 header('Content-Type: text/plain; charset=utf-8');
1915 } else {
1916 header('Content-Type: '.$mimetype);
596c7115
PS
1917 }
1918
d5dd0540
PS
1919 $lastmodified = is_object($file) ? $file->get_timemodified() : filemtime($file);
1920 header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
116ee3e4 1921
d5dd0540
PS
1922 if (is_object($file)) {
1923 header('ETag: ' . $file->get_contenthash());
1924 if (isset($_SERVER['HTTP_IF_NONE_MATCH']) and $_SERVER['HTTP_IF_NONE_MATCH'] === $file->get_contenthash()) {
1925 header('HTTP/1.1 304 Not Modified');
1926 return;
1927 }
1928 }
1929
1930 // if etag present for stored file rely on it exclusively
1931 if (!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) and (empty($_SERVER['HTTP_IF_NONE_MATCH']) or !is_object($file))) {
1932 // get unixtime of request header; clip extra junk off first
1933 $since = strtotime(preg_replace('/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"]));
1934 if ($since && $since >= $lastmodified) {
1935 header('HTTP/1.1 304 Not Modified');
1936 return;
1937 }
1938 }
1939
1940 if ($accelerate and !empty($CFG->xsendfile)) {
1941 if (empty($CFG->disablebyteserving) and $mimetype !== 'text/plain') {
1942 header('Accept-Ranges: bytes');
1943 } else {
1944 header('Accept-Ranges: none');
1945 }
1946
1947 if (is_object($file)) {
1948 $fs = get_file_storage();
1949 if ($fs->xsendfile($file->get_contenthash())) {
1950 return;
1951 }
1952
1953 } else {
1954 require_once("$CFG->libdir/xsendfilelib.php");
1955 if (xsendfile($file)) {
1956 return;
1957 }
1958 }
1959 }
1960
1961 $filesize = is_object($file) ? $file->get_filesize() : filesize($file);
1962
1963 header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
1964
1965 if ($accelerate and empty($CFG->disablebyteserving) and $mimetype !== 'text/plain') {
1966 header('Accept-Ranges: bytes');
1967
1968 if (!empty($_SERVER['HTTP_RANGE']) and strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) {
1969 // byteserving stuff - for acrobat reader and download accelerators
1970 // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
1971 // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
1972 $ranges = false;
1973 if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
1974 foreach ($ranges as $key=>$value) {
1975 if ($ranges[$key][1] == '') {
1976 //suffix case
1977 $ranges[$key][1] = $filesize - $ranges[$key][2];
1978 $ranges[$key][2] = $filesize - 1;
1979 } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
1980 //fix range length
1981 $ranges[$key][2] = $filesize - 1;
1982 }
1983 if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
1984 //invalid byte-range ==> ignore header
1985 $ranges = false;
1986 break;
1987 }
1988 //prepare multipart header
1989 $ranges[$key][0] = "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n";
1990 $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n";
1991 }
1992 } else {
1993 $ranges = false;
1994 }
1995 if ($ranges) {
1996 if (is_object($file)) {
1997 $handle = $file->get_content_file_handle();
1998 } else {
1999 $handle = fopen($file, 'rb');
2000 }
2001 byteserving_send_file($handle, $mimetype, $ranges, $filesize);
2002 }
2003 }
2004 } else {
2005 // Do not byteserve
2006 header('Accept-Ranges: none');
2007 }
2008
2009 header('Content-Length: '.$filesize);
2010
2011 if ($filesize > 10000000) {
2012 // for large files try to flush and close all buffers to conserve memory
2013 while(@ob_get_level()) {
2014 if (!@ob_end_flush()) {
2015 break;
2016 }
cbad562e
PS
2017 }
2018 }
2019
d5dd0540
PS
2020 // send the whole file content
2021 if (is_object($file)) {
2022 $file->readfile();
2023 } else {
2024 readfile($file);
2025 }
2026}
2027
2028/**
2029 * Similar to readfile_accel() but designed for strings.
2030 * @param string $string
2031 * @param string $mimetype
2032 * @param bool $accelerate
2033 * @return void
2034 */
2035function readstring_accel($string, $mimetype, $accelerate) {
2036 global $CFG;
2037
2038 if ($mimetype === 'text/plain') {
2039 // there is no encoding specified in text files, we need something consistent
2040 header('Content-Type: text/plain; charset=utf-8');
2041 } else {
2042 header('Content-Type: '.$mimetype);
2043 }
2044 header('Last-Modified: '. gmdate('D, d M Y H:i:s', time()) .' GMT');
2045 header('Accept-Ranges: none');
2046
2047 if ($accelerate and !empty($CFG->xsendfile)) {
2048 $fs = get_file_storage();
2049 if ($fs->xsendfile(sha1($string))) {
2050 return;
2051 }
2052 }
cbad562e 2053
d5dd0540
PS
2054 header('Content-Length: '.strlen($string));
2055 echo $string;
cbad562e
PS
2056}
2057
c87c428e 2058/**
2059 * Handles the sending of temporary file to user, download is forced.
d2b7803e 2060 * File is deleted after abort or successful sending, does not return, script terminated
ba21c9d4 2061 *
c87c428e 2062 * @param string $path path to file, preferably from moodledata/temp/something; or content of file itself
2063 * @param string $filename proposed file name when saving file
d2b7803e 2064 * @param bool $pathisstring If the path is string
c87c428e 2065 */
45c0d224 2066function send_temp_file($path, $filename, $pathisstring=false) {
c87c428e 2067 global $CFG;
2068
d5dd0540
PS
2069 if (check_browser_version('Firefox', '1.5')) {
2070 // only FF is known to correctly save to disk before opening...
2071 $mimetype = mimeinfo('type', $filename);
2072 } else {
2073 $mimetype = 'application/x-forcedownload';
2074 }
2075
c87c428e 2076 // close session - not needed anymore
d5dd0540 2077 session_get_instance()->write_close();
c87c428e 2078
2079 if (!$pathisstring) {
2080 if (!file_exists($path)) {
dbdc7355 2081 send_header_404();
45c0d224 2082 print_error('filenotfound', 'error', $CFG->wwwroot.'/');
c87c428e 2083 }
2084 // executed after normal finish or abort
2085 @register_shutdown_function('send_temp_file_finished', $path);
2086 }
2087
c87c428e 2088 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
2089 if (check_browser_version('MSIE')) {
2090 $filename = urlencode($filename);
2091 }
2092
66969d50 2093 header('Content-Disposition: attachment; filename="'.$filename.'"');
c87c428e 2094 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
cbad562e
PS
2095 header('Cache-Control: max-age=10');
2096 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2097 header('Pragma: ');
c87c428e 2098 } else { //normal http - prevent caching at all cost
cbad562e
PS
2099 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
2100 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2101 header('Pragma: no-cache');
c87c428e 2102 }
c87c428e 2103
d5dd0540 2104 // send the contents - we can not accelerate this because the file will be deleted asap
c87c428e 2105 if ($pathisstring) {
d5dd0540 2106 readstring_accel($path, $mimetype, false);
c87c428e 2107 } else {
d5dd0540
PS
2108 readfile_accel($path, $mimetype, false);
2109 @unlink($path);
c87c428e 2110 }
2111
2112 die; //no more chars to output
2113}
2114
2115/**
34ff25a6 2116 * Internal callback function used by send_temp_file()
d2b7803e
DC
2117 *
2118 * @param string $path
c87c428e 2119 */
2120function send_temp_file_finished($path) {
2121 if (file_exists($path)) {
2122 @unlink($path);
2123 }
2124}
2125
76ca1ff1 2126/**
2127 * Handles the sending of file data to the user's browser, including support for
2128 * byteranges etc.
ba21c9d4 2129 *
d2b7803e 2130 * @category files
ba75ad94 2131 * @param string $path Path of file on disk (including real filename), or actual content of file as string
2132 * @param string $filename Filename to send
2133 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
2134 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
2135 * @param bool $pathisstring If true (default false), $path is the content to send and not the pathname
2136 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
2137 * @param string $mimetype Include to specify the MIME type; leave blank to have it guess the type from $filename
b379f7d9 2138 * @param bool $dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
2139 * if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
29e3d7e2 2140 * you must detect this case when control is returned using connection_aborted. Please not that session is closed
2141 * and should not be reopened.
d2b7803e 2142 * @return null script execution stopped unless $dontdie is true
b9709b76 2143 */
b379f7d9 2144function send_file($path, $filename, $lifetime = 'default' , $filter=0, $pathisstring=false, $forcedownload=false, $mimetype='', $dontdie=false) {
d5dd0540 2145 global $CFG, $COURSE;
50f95991 2146
b379f7d9 2147 if ($dontdie) {
15325f55 2148 ignore_user_abort(true);
b379f7d9 2149 }
2150
c8a5c6a4 2151 // MDL-11789, apply $CFG->filelifetime here
2152 if ($lifetime === 'default') {
2153 if (!empty($CFG->filelifetime)) {
0cde3ede 2154 $lifetime = $CFG->filelifetime;
c8a5c6a4 2155 } else {
0cde3ede 2156 $lifetime = 86400;
c8a5c6a4 2157 }
2158 }
2159
56949c17 2160 session_get_instance()->write_close(); // unlock session during fileserving
172dd12c 2161
ba4e0b05 2162 // Use given MIME type if specified, otherwise guess it using mimeinfo.
2163 // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
2164 // only Firefox saves all files locally before opening when content-disposition: attachment stated
2165 $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
76ca1ff1 2166 $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
ba4e0b05 2167 ($mimetype ? $mimetype : mimeinfo('type', $filename));
b5bbeaf0 2168
4f047de2 2169 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
2170 if (check_browser_version('MSIE')) {
4638009b 2171 $filename = rawurlencode($filename);
4f047de2 2172 }
2173
4c8c65ec 2174 if ($forcedownload) {
cbad562e 2175 header('Content-Disposition: attachment; filename="'.$filename.'"');
4c8c65ec 2176 } else {
cbad562e 2177 header('Content-Disposition: inline; filename="'.$filename.'"');
4c8c65ec 2178 }
2179
f1e0649c 2180 if ($lifetime > 0) {
d5dd0540 2181 $nobyteserving = false;
cbad562e
PS
2182 header('Cache-Control: max-age='.$lifetime);
2183 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
2184 header('Pragma: ');
4c8c65ec 2185
4c8c65ec 2186 } else { // Do not cache files in proxies and browsers
d5dd0540 2187 $nobyteserving = true;
85e00626 2188 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
cbad562e
PS
2189 header('Cache-Control: max-age=10');
2190 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2191 header('Pragma: ');
85e00626 2192 } else { //normal http - prevent caching at all cost
cbad562e
PS
2193 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
2194 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2195 header('Pragma: no-cache');
85e00626 2196 }
69faecce 2197 }
f1e0649c 2198
b9709b76 2199 if (empty($filter)) {
cbad562e 2200 // send the contents
f1e0649c 2201 if ($pathisstring) {
d5dd0540 2202 readstring_accel($path, $mimetype, !$dontdie);
4c8c65ec 2203 } else {
d5dd0540 2204 readfile_accel($path, $mimetype, !$dontdie);
f1e0649c 2205 }
cbad562e 2206
d5dd0540
PS
2207 } else {
2208 // Try to put the file through filters
f1e0649c 2209 if ($mimetype == 'text/html') {
365a5941 2210 $options = new stdClass();
f1e0649c 2211 $options->noclean = true;
a17c57b5 2212 $options->nocache = true; // temporary workaround for MDL-5136
f1e0649c 2213 $text = $pathisstring ? $path : implode('', file($path));
76ca1ff1 2214
3ace5ee4 2215 $text = file_modify_html_header($text);
60f9e36e 2216 $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
f1e0649c 2217
d5dd0540 2218 readstring_accel($output, $mimetype, false);
c4cef1fe 2219
b9709b76 2220 } else if (($mimetype == 'text/plain') and ($filter == 1)) {
d5dd0540 2221 // only filter text if filter all files is selected
365a5941 2222 $options = new stdClass();
f1e0649c 2223 $options->newlines = false;
2224 $options->noclean = true;
2225 $text = htmlentities($pathisstring ? $path : implode('', file($path)));
60f9e36e 2226 $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
f1e0649c 2227
d5dd0540 2228 readstring_accel($output, $mimetype, false);
c4cef1fe 2229
d5dd0540 2230 } else {
cbad562e 2231 // send the contents
f1e0649c 2232 if ($pathisstring) {
d5dd0540
PS
2233 readstring_accel($path, $mimetype, !$dontdie);
2234 } else {
2235 readfile_accel($path, $mimetype, !$dontdie);
f1e0649c 2236 }
2237 }
2238 }
b379f7d9 2239 if ($dontdie) {
2240 return;
2241 }
f1e0649c 2242 die; //no more chars to output!!!
2243}
2244
172dd12c 2245/**
2246 * Handles the sending of file data to the user's browser, including support for
2247 * byteranges etc.
ba21c9d4 2248 *
796495fe
DM
2249 * The $options parameter supports the following keys:
2250 * (string|null) preview - send the preview of the file (e.g. "thumb" for a thumbnail)
2251 * (string|null) filename - overrides the implicit filename
2252 * (bool) dontdie - return control to caller afterwards. this is not recommended and only used for cleanup tasks.
2253 * if this is passed as true, ignore_user_abort is called. if you don't want your processing to continue on cancel,
2254 * you must detect this case when control is returned using connection_aborted. Please not that session is closed
2255 * and should not be reopened.
2256 *
d2b7803e 2257 * @category files
d2b7803e 2258 * @param stored_file $stored_file local file object
172dd12c 2259 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
2260 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
2261 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
796495fe
DM
2262 * @param array $options additional options affecting the file serving
2263 * @return null script execution stopped unless $options['dontdie'] is true
172dd12c 2264 */
796495fe 2265function send_stored_file($stored_file, $lifetime=86400 , $filter=0, $forcedownload=false, array $options=array()) {
d5dd0540 2266 global $CFG, $COURSE;
172dd12c 2267
796495fe
DM
2268 if (empty($options['filename'])) {
2269 $filename = null;
2270 } else {
2271 $filename = $options['filename'];
2272 }
2273
2274 if (empty($options['dontdie'])) {
2275 $dontdie = false;
2276 } else {
2277 $dontdie = true;
2278 }
2279
82c224ee
DM
2280 if (!empty($options['preview'])) {
2281 // replace the file with its preview
2282 $fs = get_file_storage();
2283 $stored_file = $fs->get_file_preview($stored_file, $options['preview']);
2284 if (!$stored_file) {
2285 // unable to create a preview of the file
2286 send_header_404();
2287 die();
2288 } else {
2289 // preview images have fixed cache lifetime and they ignore forced download
2290 // (they are generated by GD and therefore they are considered reasonably safe).
2291 $lifetime = DAYSECS;
2292 $filter = 0;
2293 $forcedownload = false;
2294 }
2295 }
2296
67233725
DC
2297 // handle external resource
2298 if ($stored_file->is_external_file()) {
2299 $stored_file->send_file($lifetime, $filter, $forcedownload, $options);
2300 die;
2301 }
2302
2f657978
PS
2303 if (!$stored_file or $stored_file->is_directory()) {
2304 // nothing to serve
2305 if ($dontdie) {
2306 return;
2307 }
2308 die;
2309 }
2310
b379f7d9 2311 if ($dontdie) {
15325f55 2312 ignore_user_abort(true);
b379f7d9 2313 }
2314
56949c17 2315 session_get_instance()->write_close(); // unlock session during fileserving
172dd12c 2316
2317 // Use given MIME type if specified, otherwise guess it using mimeinfo.
2318 // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
2319 // only Firefox saves all files locally before opening when content-disposition: attachment stated
2320 $filename = is_null($filename) ? $stored_file->get_filename() : $filename;
2321 $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
2322 $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
2323 ($stored_file->get_mimetype() ? $stored_file->get_mimetype() : mimeinfo('type', $filename));
b5bbeaf0 2324
172dd12c 2325 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
2326 if (check_browser_version('MSIE')) {
2327 $filename = rawurlencode($filename);
2328 }
2329
2330 if ($forcedownload) {
cbad562e 2331 header('Content-Disposition: attachment; filename="'.$filename.'"');
172dd12c 2332 } else {
cbad562e 2333 header('Content-Disposition: inline; filename="'.$filename.'"');
172dd12c 2334 }
2335
2336 if ($lifetime > 0) {
cbad562e
PS
2337 header('Cache-Control: max-age='.$lifetime);
2338 header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
2339 header('Pragma: ');
172dd12c 2340
172dd12c 2341 } else { // Do not cache files in proxies and browsers
2342 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
cbad562e
PS
2343 header('Cache-Control: max-age=10');
2344 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2345 header('Pragma: ');
172dd12c 2346 } else { //normal http - prevent caching at all cost
cbad562e
PS
2347 header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
2348 header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
2349 header('Pragma: no-cache');
172dd12c 2350 }
172dd12c 2351 }
2352
2353 if (empty($filter)) {
cbad562e 2354 // send the contents
d5dd0540 2355 readfile_accel($stored_file, $mimetype, !$dontdie);
172dd12c 2356
2357 } else { // Try to put the file through filters
2358 if ($mimetype == 'text/html') {
365a5941 2359 $options = new stdClass();
172dd12c 2360 $options->noclean = true;
2361 $options->nocache = true; // temporary workaround for MDL-5136
2362 $text = $stored_file->get_content();
2363 $text = file_modify_html_header($text);
2364 $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
172dd12c 2365
d5dd0540 2366 readstring_accel($output, $mimetype, false);
c4cef1fe 2367
172dd12c 2368 } else if (($mimetype == 'text/plain') and ($filter == 1)) {
c4cef1fe 2369 // only filter text if filter all files is selected
365a5941 2370 $options = new stdClass();
172dd12c 2371 $options->newlines = false;
2372 $options->noclean = true;
2373 $text = $stored_file->get_content();
2374 $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
172dd12c 2375
d5dd0540 2376 readstring_accel($output, $mimetype, false);
c4cef1fe 2377
172dd12c 2378 } else { // Just send it out raw
d5dd0540 2379 readfile_accel($stored_file, $mimetype, !$dontdie);
172dd12c 2380 }
2381 }
b379f7d9 2382 if ($dontdie) {
2383 return;
2384 }
172dd12c 2385 die; //no more chars to output!!!
2386}
2387
ba21c9d4 2388/**
34ff25a6 2389 * Retrieves an array of records from a CSV file and places
ba21c9d4 2390 * them into a given table structure
2391 *
d2b7803e
DC
2392 * @global stdClass $CFG
2393 * @global moodle_database $DB
ba21c9d4 2394 * @param string $file The path to a CSV file
2395 * @param string $table The table to retrieve columns from
2396 * @return bool|array Returns an array of CSV records or false
2397 */
a43b5308 2398function get_records_csv($file, $table) {
f33e1ed4 2399 global $CFG, $DB;
599f38f9 2400
f33e1ed4 2401 if (!$metacolumns = $DB->get_columns($table)) {
599f38f9 2402 return false;
2403 }
2404
a77b98eb 2405 if(!($handle = @fopen($file, 'r'))) {
5a2a5331 2406 print_error('get_records_csv failed to open '.$file);
599f38f9 2407 }
2408
2409 $fieldnames = fgetcsv($handle, 4096);
2410 if(empty($fieldnames)) {
2411 fclose($handle);
2412 return false;
2413 }
2414
2415 $columns = array();
2416
2417 foreach($metacolumns as $metacolumn) {
2418 $ord = array_search($metacolumn->name, $fieldnames);
2419 if(is_int($ord)) {
2420 $columns[$metacolumn->name] = $ord;
2421 }
2422 }
2423
2424 $rows = array();
2425
2426 while (($data = fgetcsv($handle, 4096)) !== false) {
2427 $item = new stdClass;
2428 foreach($columns as $name => $ord) {
2429 $item->$name = $data[$ord];
2430 }
2431 $rows[] = $item;
2432 }
2433
2434 fclose($handle);
2435 return $rows;
2436}
2437
ba21c9d4 2438/**
d2b7803e 2439 * Create a file with CSV contents
117bd748 2440 *
d2b7803e
DC
2441 * @global stdClass $CFG
2442 * @global moodle_database $DB
ba21c9d4 2443 * @param string $file The file to put the CSV content into
2444 * @param array $records An array of records to write to a CSV file
2445 * @param string $table The table to get columns from
2446 * @return bool success
2447 */
a77b98eb 2448function put_records_csv($file, $records, $table = NULL) {
f33e1ed4 2449 global $CFG, $DB;
a77b98eb 2450
a1e93da2 2451 if (empty($records)) {
a77b98eb 2452 return true;
2453 }
2454
2455 $metacolumns = NULL;
f33e1ed4 2456 if ($table !== NULL && !$metacolumns = $DB->get_columns($table)) {
a77b98eb 2457 return false;
2458 }
2459
a1e93da2 2460 echo "x";
2461
7aa06e6d 2462 if(!($fp = @fopen($CFG->tempdir.'/'.$file, 'w'))) {
5a2a5331 2463 print_error('put_records_csv failed to open '.$file);
a77b98eb 2464 }
2465
a43b5308 2466 $proto = reset($records);
2467 if(is_object($proto)) {
2468 $fields_records = array_keys(get_object_vars($proto));
2469 }
2470 else if(is_array($proto)) {
2471 $fields_records = array_keys($proto);
2472 }
2473 else {
2474 return false;
2475 }
a1e93da2 2476 echo "x";
a77b98eb 2477
2478 if(!empty($metacolumns)) {
2479 $fields_table = array_map(create_function('$a', 'return $a->name;'), $metacolumns);
2480 $fields = array_intersect($fields_records, $fields_table);
2481 }
2482 else {
2483 $fields = $fields_records;
2484 }
2485
2486 fwrite($fp, implode(',', $fields));
2487 fwrite($fp, "\r\n");
2488
2489 foreach($records as $record) {
a43b5308 2490 $array = (array)$record;
a77b98eb 2491 $values = array();
2492 foreach($fields as $field) {
a43b5308 2493 if(strpos($array[$field], ',')) {
2494 $values[] = '"'.str_replace('"', '\"', $array[$field]).'"';
a77b98eb 2495 }
2496 else {
a43b5308 2497 $values[] = $array[$field];
a77b98eb 2498 }
2499 }
2500 fwrite($fp, implode(',', $values)."\r\n");
2501 }
2502
2503 fclose($fp);
2504 return true;
2505}
2506
f401cc97 2507
34763a79 2508/**
76ca1ff1 2509 * Recursively delete the file or folder with path $location. That is,
34763a79 2510 * if it is a file delete it. If it is a folder, delete all its content
db3a0b34 2511 * then delete it. If $location does not exist to start, that is not
2512 * considered an error.
76ca1ff1 2513 *
eab8ed9f 2514 * @param string $location the path to remove.
ba21c9d4 2515 * @return bool
34763a79 2516 */
4c8c65ec 2517function fulldelete($location) {
1e06adb4
PS
2518 if (empty($location)) {
2519 // extra safety against wrong param
2520 return false;
2521 }
f401cc97 2522 if (is_dir($location)) {
2523 $currdir = opendir($location);
2524 while (false !== ($file = readdir($currdir))) {
2525 if ($file <> ".." && $file <> ".") {
2526 $fullfile = $location."/".$file;
4c8c65ec 2527 if (is_dir($fullfile)) {
f401cc97 2528 if (!fulldelete($fullfile)) {
2529 return false;
2530 }
2531 } else {
2532 if (!unlink($fullfile)) {
2533 return false;
2534 }
4c8c65ec 2535 }
f401cc97 2536 }
4c8c65ec 2537 }
f401cc97 2538 closedir($currdir);
2539 if (! rmdir($location)) {
2540 return false;
2541 }
2542
34763a79 2543 } else if (file_exists($location)) {
f401cc97 2544 if (!unlink($location)) {
2545 return false;
2546 }
2547 }
2548 return true;
2549}
2550
4c8c65ec 2551/**
2552 * Send requested byterange of file.
ba21c9d4 2553 *
d2b7803e 2554 * @param resource $handle A file handle
ba21c9d4 2555 * @param string $mimetype The mimetype for the output
2556 * @param array $ranges An array of ranges to send
2557 * @param string $filesize The size of the content if only one range is used
4c8c65ec 2558 */
172dd12c 2559function byteserving_send_file($handle, $mimetype, $ranges, $filesize) {
d5dd0540
PS
2560 // better turn off any kind of compression and buffering
2561 @ini_set('zlib.output_compression', 'Off');
2562
4c8c65ec 2563 $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
4c8c65ec 2564 if ($handle === false) {
2565 die;
2566 }
2567 if (count($ranges) == 1) { //only one range requested
2568 $length = $ranges[0][2] - $ranges[0][1] + 1;
cbad562e
PS
2569 header('HTTP/1.1 206 Partial content');
2570 header('Content-Length: '.$length);
2571 header('Content-Range: bytes '.$ranges[0][1].'-'.$ranges[0][2].'/'.$filesize);
2572 header('Content-Type: '.$mimetype);
c4cef1fe 2573
d5dd0540
PS
2574 while(@ob_get_level()) {
2575 if (!@ob_end_flush()) {
2576 break;
2577 }
2578 }
c4cef1fe 2579
4c8c65ec 2580 fseek($handle, $ranges[0][1]);
2581 while (!feof($handle) && $length > 0) {
68913aec 2582 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
4c8c65ec 2583 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
2584 echo $buffer;
2585 flush();
2586 $length -= strlen($buffer);
2587 }
2588 fclose($handle);
2589 die;
2590 } else { // multiple ranges requested - not tested much
2591 $totallength = 0;
2592 foreach($ranges as $range) {
aba588a7 2593 $totallength += strlen($range[0]) + $range[2] - $range[1] + 1;
4c8c65ec 2594 }
aba588a7 2595 $totallength += strlen("\r\n--".BYTESERVING_BOUNDARY."--\r\n");
cbad562e
PS
2596 header('HTTP/1.1 206 Partial content');
2597 header('Content-Length: '.$totallength);
2598 header('Content-Type: multipart/byteranges; boundary='.BYTESERVING_BOUNDARY);
c4cef1fe 2599
d5dd0540
PS
2600 while(@ob_get_level()) {
2601 if (!@ob_end_flush()) {
2602 break;
2603 }
2604 }
c4cef1fe 2605
4c8c65ec 2606 foreach($ranges as $range) {
2607 $length = $range[2] - $range[1] + 1;
2608 echo $range[0];
4c8c65ec 2609 fseek($handle, $range[1]);
2610 while (!feof($handle) && $length > 0) {
68913aec 2611 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
4c8c65ec 2612 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
2613 echo $buffer;
2614 flush();
2615 $length -= strlen($buffer);
2616 }
2617 }
2618 echo "\r\n--".BYTESERVING_BOUNDARY."--\r\n";
2619 fclose($handle);
2620 die;
2621 }
2622}
f401cc97 2623
3ace5ee4 2624/**
2625 * add includes (js and css) into uploaded files
2626 * before returning them, useful for themes and utf.js includes
ba21c9d4 2627 *
d2b7803e 2628 * @global stdClass $CFG
ba21c9d4 2629 * @param string $text text to search and replace
2630 * @return string text with added head includes
d2b7803e 2631 * @todo MDL-21120
3ace5ee4 2632 */
2633function file_modify_html_header($text) {
2634 // first look for <head> tag
2635 global $CFG;
76ca1ff1 2636
3ace5ee4 2637 $stylesheetshtml = '';
78946b9b
PS
2638/* foreach ($CFG->stylesheets as $stylesheet) {
2639 //TODO: MDL-21120
3ace5ee4 2640 $stylesheetshtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n";
78946b9b 2641 }*/
76ca1ff1 2642
5b8fa09b 2643 $ufo = '';
2644 if (filter_is_enabled('filter/mediaplugin')) {
76ca1ff1 2645 // this script is needed by most media filter plugins.
f2ab0d06 2646 $attributes = array('type'=>'text/javascript', 'src'=>$CFG->httpswwwroot . '/lib/ufo.js');
26acc814 2647 $ufo = html_writer::tag('script', '', $attributes) . "\n";
3ace5ee4 2648 }
76ca1ff1 2649
3ace5ee4 2650 preg_match('/\<head\>|\<HEAD\>/', $text, $matches);
2651 if ($matches) {
2652 $replacement = '<head>'.$ufo.$stylesheetshtml;
2653 $text = preg_replace('/\<head\>|\<HEAD\>/', $replacement, $text, 1);
76ca1ff1 2654 return $text;
3ace5ee4 2655 }
76ca1ff1 2656
3ace5ee4 2657 // if not, look for <html> tag, and stick <head> right after
2658 preg_match('/\<html\>|\<HTML\>/', $text, $matches);
2659 if ($matches) {
2660 // replace <html> tag with <html><head>includes</head>
13534ef7 2661 $replacement = '<html>'."\n".'<head>'.$ufo.$stylesheetshtml.'</head>';
3ace5ee4 2662 $text = preg_replace('/\<html\>|\<HTML\>/', $replacement, $text, 1);
76ca1ff1 2663 return $text;
3ace5ee4 2664 }
76ca1ff1 2665
3ace5ee4 2666 // if not, look for <body> tag, and stick <head> before body
2667 preg_match('/\<body\>|\<BODY\>/', $text, $matches);
2668 if ($matches) {
13534ef7 2669 $replacement = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".'<body>';
3ace5ee4 2670 $text = preg_replace('/\<body\>|\<BODY\>/', $replacement, $text, 1);
76ca1ff1 2671 return $text;
2672 }
2673
3ace5ee4 2674 // if not, just stick a <head> tag at the beginning
2675 $text = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".$text;
2676 return $text;
2677}
2678
bb2c046d 2679/**
2680 * RESTful cURL class
2681 *
2682 * This is a wrapper class for curl, it is quite easy to use:
ba21c9d4 2683 * <code>
bb2c046d 2684 * $c = new curl;
2685 * // enable cache
2686 * $c = new curl(array('cache'=>true));
2687 * // enable cookie
2688 * $c = new curl(array('cookie'=>true));
2689 * // enable proxy
2690 * $c = new curl(array('proxy'=>true));
2691 *
2692 * // HTTP GET Method
2693 * $html = $c->get('http://example.com');
2694 * // HTTP POST Method
2695 * $html = $c->post('http://example.com/', array('q'=>'words', 'name'=>'moodle'));
2696 * // HTTP PUT Method
2697 * $html = $c->put('http://example.com/', array('file'=>'/var/www/test.txt');
ba21c9d4 2698 * </code>
bb2c046d 2699 *
d2b7803e
DC
2700 * @package core_files
2701 * @category files
2702 * @copyright Dongsheng Cai <dongsheng@moodle.com>
2703 * @license http://www.gnu.org/copyleft/gpl.html GNU Public License
bb2c046d 2704 */
bb2c046d 2705class curl {
d2b7803e 2706 /** @var bool Caches http request contents */
bb2c046d 2707 public $cache = false;
d2b7803e 2708 /** @var bool Uses proxy */
bb2c046d 2709 public $proxy = false;
d2b7803e 2710 /** @var string library version */
bb2c046d 2711 public $version = '0.4 dev';
d2b7803e 2712 /** @var array http's response */
bb2c046d 2713 public $response = array();
d2b7803e 2714 /** @var array http header */
bb2c046d 2715 public $header = array();
d2b7803e 2716 /** @var string cURL information */
bb2c046d 2717 public $info;
d2b7803e 2718 /** @var string error */
bb2c046d 2719 public $error;
117bd748 2720
d2b7803e 2721 /** @var array cURL options */
bb2c046d 2722 private $options;
d2b7803e 2723 /** @var string Proxy host */
bb2c046d 2724 private $proxy_host = '';
d2b7803e 2725 /** @var string Proxy auth */
bb2c046d 2726 private $proxy_auth = '';
d2b7803e 2727 /** @var string Proxy type */
bb2c046d 2728 private $proxy_type = '';
d2b7803e 2729 /** @var bool Debug mode on */
bb2c046d 2730 private $debug = false;
d2b7803e 2731 /** @var bool|string Path to cookie file */
bb2c046d 2732 private $cookie = false;
2733
ba21c9d4 2734 /**
d2b7803e
DC
2735 * Constructor
2736 *
2737 * @global stdClass $CFG
ba21c9d4 2738 * @param array $options
2739 */
bb2c046d 2740 public function __construct($options = array()){
2741 global $CFG;
2742 if (!function_exists('curl_init')) {
2743 $this->error = 'cURL module must be enabled!';
2744 trigger_error($this->error, E_USER_ERROR);
2745 return false;
2746 }
2747 // the options of curl should be init here.
2748 $this->resetopt();
2749 if (!empty($options['debug'])) {
2750 $this->debug = true;
2751 }
2752 if(!empty($options['cookie'])) {
2753 if($options['cookie'] === true) {
2754 $this->cookie = $CFG->dataroot.'/curl_cookie.txt';
2755 } else {
2756 $this->cookie = $options['cookie'];
2757 }
2758 }
2759 if (!empty($options['cache'])) {
2760 if (class_exists('curl_cache')) {
5430f05b 2761 if (!empty($options['module_cache'])) {
2762 $this->cache = new curl_cache($options['module_cache']);
2763 } else {
2764 $this->cache = new curl_cache('misc');
2765 }
bb2c046d 2766 }
2767 }
d04ce87f 2768 if (!empty($CFG->proxyhost)) {
2769 if (empty($CFG->proxyport)) {
2770 $this->proxy_host = $CFG->proxyhost;
2771 } else {
2772 $this->proxy_host = $CFG->proxyhost.':'.$CFG->proxyport;
2773 }
2774 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
2775 $this->proxy_auth = $CFG->proxyuser.':'.$CFG->proxypassword;
2776 $this->setopt(array(
2777 'proxyauth'=> CURLAUTH_BASIC | CURLAUTH_NTLM,
2778 'proxyuserpwd'=>$this->proxy_auth));
2779 }
2780 if (!empty($CFG->proxytype)) {
2781 if ($CFG->proxytype == 'SOCKS5') {
2782 $this->proxy_type = CURLPROXY_SOCKS5;
bb2c046d 2783 } else {
d04ce87f 2784 $this->proxy_type = CURLPROXY_HTTP;
f6d3e2c4 2785 $this->setopt(array('httpproxytunnel'=>false));
bb2c046d 2786 }
d04ce87f 2787 $this->setopt(array('proxytype'=>$this->proxy_type));
bb2c046d 2788 }
d04ce87f 2789 }
2790 if (!empty($this->proxy_host)) {
2791 $this->proxy = array('proxy'=>$this->proxy_host);
bb2c046d 2792 }
2793 }
ba21c9d4 2794 /**
2795 * Resets the CURL options that have already been set
2796 */
bb2c046d 2797 public function resetopt(){
2798 $this->options = array();
2799 $this->options['CURLOPT_USERAGENT'] = 'MoodleBot/1.0';
2800 // True to include the header in the output
2801 $this->options['CURLOPT_HEADER'] = 0;
2802 // True to Exclude the body from the output
2803 $this->options['CURLOPT_NOBODY'] = 0;
2804 // TRUE to follow any "Location: " header that the server
2805 // sends as part of the HTTP header (note this is recursive,
2806 // PHP will follow as many "Location: " headers that it is sent,
2807 // unless CURLOPT_MAXREDIRS is set).
99eaca9d 2808 //$this->options['CURLOPT_FOLLOWLOCATION'] = 1;
bb2c046d 2809 $this->options['CURLOPT_MAXREDIRS'] = 10;
2810 $this->options['CURLOPT_ENCODING'] = '';
2811 // TRUE to return the transfer as a string of the return
2812 // value of curl_exec() instead of outputting it out directly.
2813 $this->options['CURLOPT_RETURNTRANSFER'] = 1;
2814 $this->options['CURLOPT_BINARYTRANSFER'] = 0;
2815 $this->options['CURLOPT_SSL_VERIFYPEER'] = 0;
2816 $this->options['CURLOPT_SSL_VERIFYHOST'] = 2;
6135bd45 2817 $this->options['CURLOPT_CONNECTTIMEOUT'] = 30;
bb2c046d 2818 }
2819
2820 /**
2821 * Reset Cookie
bb2c046d 2822 */
2823 public function resetcookie() {
2824 if (!empty($this->cookie)) {
2825 if (is_file($this->cookie)) {
2826 $fp = fopen($this->cookie, 'w');
2827 if (!empty($fp)) {
2828 fwrite($fp, '');
2829 fclose($fp);
2830 }
2831 }
2832 }
2833 }
2834
2835 /**
2836 * Set curl options
2837 *
2838 * @param array $options If array is null, this function will
2839 * reset the options to default value.
bb2c046d 2840 */
2841 public function setopt($options = array()) {
2842 if (is_array($options)) {
2843 foreach($options as $name => $val){
2844 if (stripos($name, 'CURLOPT_') === false) {
2845 $name = strtoupper('CURLOPT_'.$name);
2846 }
2847 $this->options[$name] = $val;
2848 }
2849 }
2850 }
d2b7803e 2851
bb2c046d 2852 /**
2853 * Reset http method
bb2c046d 2854 */
2855 public function cleanopt(){
2856 unset($this->options['CURLOPT_HTTPGET']);
2857 unset($this->options['CURLOPT_POST']);
2858 unset($this->options['CURLOPT_POSTFIELDS']);
2859 unset($this->options['CURLOPT_PUT']);
2860 unset($this->options['CURLOPT_INFILE']);
2861 unset($this->options['CURLOPT_INFILESIZE']);
2862 unset($this->options['CURLOPT_CUSTOMREQUEST']);
2863 }
2864
2865 /**
2866 * Set HTTP Request Header
2867 *
d2b7803e 2868 * @param array $header
bb2c046d 2869 */
2870 public function setHeader($header) {
2871 if (is_array($header)){
2872 foreach ($header as $v) {
2873 $this->setHeader($v);
2874 }
2875 } else {
2876 $this->header[] = $header;
2877 }
2878 }
d2b7803e 2879
bb2c046d 2880 /**
2881 * Set HTTP Response Header
2882 *
2883 */
2884 public function getResponse(){
2885 return $this->response;
2886 }
d2b7803e 2887
bb2c046d 2888 /**
2889 * private callback function
2890 * Formatting HTTP Response Header
2891 *
d2b7803e 2892 * @param resource $ch Apparently not used
ba21c9d4 2893 * @param string $header
2894 * @return int The strlen of the header
bb2c046d 2895 */
2896 private function formatHeader($ch, $header)
2897 {
2898 $this->count++;
2899 if (strlen($header) > 2) {
2900 list($key, $value) = explode(" ", rtrim($header, "\r\n"), 2);
2901 $key = rtrim($key, ':');
2902 if (!empty($this->response[$key])) {
2903 if (is_array($this->response[$key])){
2904 $this->response[$key][] = $value;
2905 } else {
2906 $tmp = $this->response[$key];
2907 $this->response[$key] = array();
2908 $this->response[$key][] = $tmp;
2909 $this->response[$key][] = $value;
2910
2911 }
2912 } else {
2913 $this->response[$key] = $value;
2914 }
2915 }
2916 return strlen($header);
2917 }
2918
2919 /**
2920 * Set options for individual curl instance
ba21c9d4 2921 *
d2b7803e 2922 * @param resource $curl A curl handle
ba21c9d4 2923 * @param array $options
d2b7803e 2924 * @return resource The curl handle
bb2c046d 2925 */
2926 private function apply_opt($curl, $options) {
2927 // Clean up
2928 $this->cleanopt();
2929 // set cookie
2930 if (!empty($this->cookie) || !empty($options['cookie'])) {
2931 $this->setopt(array('cookiejar'=>$this->cookie,
2932 'cookiefile'=>$this->cookie
2933 ));
2934 }
2935
2936 // set proxy
2937 if (!empty($this->proxy) || !empty($options['proxy'])) {
2938 $this->setopt($this->proxy);
2939 }
2940 $this->setopt($options);
2941 // reset before set options
2942 curl_setopt($curl, CURLOPT_HEADERFUNCTION, array(&$this,'formatHeader'));
2943 // set headers
2944 if (empty($this->header)){
2945 $this->setHeader(array(
2946 'User-Agent: MoodleBot/1.0',
2947 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7',
2948 'Connection: keep-alive'
2949 ));
2950 }
2951 curl_setopt($curl, CURLOPT_HTTPHEADER, $this->header);
2952
2953 if ($this->debug){
2954 echo '<h1>Options</h1>';
2955 var_dump($this->options);
2956 echo '<h1>Header</h1>';
2957 var_dump($this->header);
2958 }
2959
2960 // set options
2961 foreach($this->options as $name => $val) {
2962 if (is_string($name)) {
2963 $name = constant(strtoupper($name));
2964 }
2965 curl_setopt($curl, $name, $val);
2966 }
2967 return $curl;
2968 }
d2b7803e 2969
ba21c9d4 2970 /**
bb2c046d 2971 * Download multiple files in parallel
ba21c9d4 2972 *
2973 * Calls {@link multi()} with specific download headers
2974 *
2975 * <code>
bb2c046d 2976 * $c = new curl;
2977 * $c->download(array(
172dd12c 2978 * array('url'=>'http://localhost/', 'file'=>fopen('a', 'wb')),
bb2c046d 2979 * array('url'=>'http://localhost/20/', 'file'=>fopen('b', 'wb'))
2980 * ));
ba21c9d4 2981 * </code>
2982 *
2983 * @param array $requests An array of files to request
2984 * @param array $options An array of options to set
2985 * @return array An array of results
bb2c046d 2986 */
2987 public function download($requests, $options = array()) {
2988 $options['CURLOPT_BINARYTRANSFER'] = 1;
2989 $options['RETURNTRANSFER'] = false;
2990 return $this->multi($requests, $options);
2991 }
d2b7803e
DC
2992
2993 /**
bb2c046d 2994 * Mulit HTTP Requests
2995 * This function could run multi-requests in parallel.
ba21c9d4 2996 *
2997 * @param array $requests An array of files to request
2998 * @param array $options An array of options to set
2999 * @return array An array of results
bb2c046d 3000 */
3001 protected function multi($requests, $options = array()) {
3002 $count = count($requests);
3003 $handles = array();
3004 $results = array();
3005 $main = curl_multi_init();
3006 for ($i = 0; $i < $count; $i++) {
3007 $url = $requests[$i];
3008 foreach($url as $n=>$v){
3009 $options[$n] = $url[$n];
3010 }
3011 $handles[$i] = curl_init($url['url']);
3012 $this->apply_opt($handles[$i], $options);
3013 curl_multi_add_handle($main, $handles[$i]);
3014 }
3015 $running = 0;
3016 do {
3017 curl_multi_exec($main, $running);
3018 } while($running > 0);
3019 for ($i = 0; $i < $count; $i++) {
ba4082f5 3020 if (!empty($options['CURLOPT_RETURNTRANSFER'])) {
bb2c046d 3021 $results[] = true;
3022 } else {
3023 $results[] = curl_multi_getcontent($handles[$i]);
3024 }
3025 curl_multi_remove_handle($main, $handles[$i]);
3026 }
3027 curl_multi_close($main);
3028 return $results;
3029 }
d2b7803e 3030
bb2c046d 3031 /**
3032 * Single HTTP Request
ba21c9d4 3033 *
3034 * @param string $url The URL to request
3035 * @param array $options
3036 * @return bool
bb2c046d 3037 */
3038 protected function request($url, $options = array()){
3039 // create curl instance
3040 $curl = curl_init($url);
3041 $options['url'] = $url;
3042 $this->apply_opt($curl, $options);
3043 if ($this->cache && $ret = $this->cache->get($this->options)) {
3044 return $ret;
3045 } else {
6135bd45 3046 $ret = curl_exec($curl);
bb2c046d 3047 if ($this->cache) {
3048 $this->cache->set($this->options, $ret);
3049 }
3050 }
3051
3052 $this->info = curl_getinfo($curl);
3053 $this->error = curl_error($curl);
3054
3055 if ($this->debug){
3056 echo '<h1>Return Data</h1>';
3057 var_dump($ret);
3058 echo '<h1>Info</h1>';
3059 var_dump($this->info);
3060 echo '<h1>Error</h1>';
3061 var_dump($this->error);
3062 }
3063
3064 curl_close($curl);
3065
6135bd45 3066 if (empty($this->error)){
bb2c046d 3067 return $ret;
3068 } else {
4dbb2b05 3069 return $this->error;
3070 // exception is not ajax friendly
3071 //throw new moodle_exception($this->error, 'curl');
bb2c046d 3072 }
3073 }
3074
3075 /**
3076 * HTTP HEAD method
ba21c9d4 3077 *
117bd748 3078 * @see request()
ba21c9d4 3079 *
3080 * @param string $url
3081 * @param array $options
3082 * @return bool
bb2c046d 3083 */
3084 public function head($url, $options = array()){
3085 $options['CURLOPT_HTTPGET'] = 0;
3086 $options['CURLOPT_HEADER'] = 1;
3087 $options['CURLOPT_NOBODY'] = 1;
3088 return $this->request($url, $options);
3089 }
3090
3091 /**
3092 * HTTP POST method
ba21c9d4 3093 *
3094 * @param string $url
117bd748 3095 * @param array|string $params
ba21c9d4 3096 * @param array $options
3097 * @return bool
bb2c046d 3098 */
28c58294 3099 public function post($url, $params = '', $options = array()){
bb2c046d 3100 $options['CURLOPT_POST'] = 1;
28c58294 3101 if (is_array($params)) {
3102 $this->_tmp_file_post_params = array();
3103 foreach ($params as $key => $value) {
3104 if ($value instanceof stored_file) {
3105 $value->add_to_curl_request($this, $key);
3106 } else {
3107 $this->_tmp_file_post_params[$key] = $value;
3108 }
5035a8b4 3109 }
28c58294 3110 $options['CURLOPT_POSTFIELDS'] = $this->_tmp_file_post_params;
3111 unset($this->_tmp_file_post_params);
3112 } else {
3113 // $params is the raw post data
3114 $options['CURLOPT_POSTFIELDS'] = $params;
5035a8b4 3115 }
bb2c046d 3116 return $this->request($url, $options);
3117 }
3118
3119 /**
3120 * HTTP GET method
ba21c9d4 3121 *
3122 * @param string $url
117bd748 3123 * @param array $params
ba21c9d4 3124 * @param array $options
3125 * @return bool
bb2c046d 3126 */
3127 public function get($url, $params = array(), $options = array()){
3128 $options['CURLOPT_HTTPGET'] = 1;
3129
3130 if (!empty($params)){
3131 $url .= (stripos($url, '?') !== false) ? '&' : '?';
3132 $url .= http_build_query($params, '', '&');
3133 }
3134 return $this->request($url, $options);
3135 }
3136
3137 /**
3138 * HTTP PUT method
ba21c9d4 3139 *
3140 * @param string $url
117bd748 3141 * @param array $params
ba21c9d4 3142 * @param array $options
3143 * @return bool
bb2c046d 3144 */
3145 public function put($url, $params = array(), $options = array()){
3146 $file = $params['file'];
3147 if (!is_file($file)){
3148 return null;
3149 }
3150 $fp = fopen($file, 'r');
3151 $size = filesize($file);
3152 $options['CURLOPT_PUT'] = 1;
3153 $options['CURLOPT_INFILESIZE'] = $size;
3154 $options['CURLOPT_INFILE'] = $fp;
3155 if (!isset($this->options['CURLOPT_USERPWD'])){
3156 $this->setopt(array('CURLOPT_USERPWD'=>'anonymous: noreply@moodle.org'));
3157 }
3158 $ret = $this->request($url, $options);
3159 fclose($fp);
3160 return $ret;
3161 }
3162
3163 /**
3164 * HTTP DELETE method
ba21c9d4 3165 *
3166 * @param string $url
d2b7803e 3167 * @param array $param
ba21c9d4 3168 * @param array $options
3169 * @return bool
bb2c046d 3170 */
3171 public function delete($url, $param = array(), $options = array()){
3172 $options['CURLOPT_CUSTOMREQUEST'] = 'DELETE';
3173 if (!isset($options['CURLOPT_USERPWD'])) {
3174 $options['CURLOPT_USERPWD'] = 'anonymous: noreply@moodle.org';
3175 }
3176 $ret = $this->request($url, $options);
3177 return $ret;
3178 }
d2b7803e 3179
bb2c046d 3180 /**
3181 * HTTP TRACE method
ba21c9d4 3182 *
3183 * @param string $url
3184 * @param array $options
3185 * @return bool
bb2c046d 3186 */
3187 public function trace($url, $options = array()){
3188 $options['CURLOPT_CUSTOMREQUEST'] = 'TRACE';
3189 $ret = $this->request($url, $options);
3190 return $ret;
3191 }
d2b7803e 3192
bb2c046d 3193 /**
3194 * HTTP OPTIONS method
ba21c9d4 3195 *
3196 * @param string $url
3197 * @param array $options
3198 * @return bool
bb2c046d 3199 */
3200 public function options($url, $options = array()){
3201 $options['CURLOPT_CUSTOMREQUEST'] = 'OPTIONS';
3202 $ret = $this->request($url, $options);
3203 return $ret;
3204 }
d2b7803e
DC
3205
3206 /**
3207 * Get curl information
3208 *
3209 * @return string
3210 */
4dbb2b05 3211 public function get_info() {
3212 return $this->info;
3213 }
bb2c046d 3214}
3215
3216/**
3217 * This class is used by cURL class, use case:
3218 *
ba21c9d4 3219 * <code>
5430f05b 3220 * $CFG->repositorycacheexpire = 120;
3221 * $CFG->curlcache = 120;
3222 *
3223 * $c = new curl(array('cache'=>true), 'module_cache'=>'repository');
bb2c046d 3224 * $ret = $c->get('http://www.google.com');
ba21c9d4 3225 * </code>
bb2c046d 3226 *
d2b7803e
DC
3227 * @package core_files
3228 * @copyright Dongsheng Cai <dongsheng@moodle.com>
3229 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
bb2c046d 3230 */
3231class curl_cache {
d2b7803e 3232 /** @var string Path to cache directory */
bb2c046d 3233 public $dir = '';
d2b7803e 3234
5430f05b 3235 /**
d2b7803e 3236 * Constructor
5430f05b 3237 *
d2b7803e
DC
3238 * @global stdClass $CFG
3239 * @param string $module which module is using curl_cache
5430f05b 3240 */
67233725 3241 public function __construct($module = 'repository') {
bb2c046d 3242 global $CFG;
5430f05b 3243 if (!empty($module)) {
365bec4c 3244 $this->dir = $CFG->cachedir.'/'.$module.'/';
5430f05b 3245 } else {
365bec4c 3246 $this->dir = $CFG->cachedir.'/misc/';
bb2c046d 3247 }
5430f05b 3248 if (!file_exists($this->dir)) {
35b622e1 3249 mkdir($this->dir, $CFG->directorypermissions, true);
bb2c046d 3250 }
5430f05b 3251 if ($module == 'repository') {
3252 if (empty($CFG->repositorycacheexpire)) {
3253 $CFG->repositorycacheexpire = 120;
3254 }
3255 $this->ttl = $CFG->repositorycacheexpire;
3256 } else {
3257 if (empty($CFG->curlcache)) {
3258 $CFG->curlcache = 120;
3259 }
3260 $this->ttl = $CFG->curlcache;
b933a139 3261 }
bb2c046d 3262 }
a08171c5 3263
509f67e3 3264 /**
e35194be 3265 * Get cached value
ba21c9d4 3266 *
d2b7803e
DC
3267 * @global stdClass $CFG
3268 * @global stdClass $USER
ba21c9d4 3269 * @param mixed $param
3270 * @return bool|string
509f67e3 3271 */
67233725 3272 public function get($param) {
aae85978 3273 global $CFG, $USER;
5430f05b 3274 $this->cleanup($this->ttl);
aae85978 3275 $filename = 'u'.$USER->id.'_'.md5(serialize($param));
bb2c046d 3276 if(file_exists($this->dir.$filename)) {
3277 $lasttime = filemtime($this->dir.$filename);
67233725 3278 if (time()-$lasttime > $this->ttl) {
bb2c046d 3279 return false;
3280 } else {
3281 $fp = fopen($this->dir.$filename, 'r');
3282 $size = filesize($this->dir.$filename);
3283 $content = fread($fp, $size);
3284 return unserialize($content);
3285 }