MDL-15516 prvent access to deleted profiles and other user areas
[moodle.git] / lib / filelib.php
CommitLineData
599f38f9 1<?php //$Id$
2
4c8c65ec 3define('BYTESERVING_BOUNDARY', 's1k2o3d4a5k6s7'); //unique string constant
4
74369ab5 5function get_file_url($path, $options=null, $type='coursefile') {
6 global $CFG;
7
8 $path = trim($path, '/'); // no leading and trailing slashes
9
10 // type of file
11 switch ($type) {
12 case 'coursefile':
13 default:
14 $url = "$CFG->wwwroot/file.php";
15 }
16
17 if ($CFG->slasharguments) {
18 $parts = explode('/', $path);
5e19ea32 19 $parts = array_map('rawurlencode', $parts);
74369ab5 20 $path = implode('/', $parts);
21 $ffurl = "$CFG->wwwroot/file.php/$path";
22 $separator = '?';
23 } else {
5e19ea32 24 $path = rawurlencode("/$path");
74369ab5 25 $ffurl = "$CFG->wwwroot/file.php?file=$path";
26 $separator = '&amp;';
27 }
28
29 if ($options) {
30 foreach ($options as $name=>$value) {
31 $ffurl = $ffurl.$separator.$name.'='.$value;
32 $separator = '&amp;';
33 }
34 }
35
36 return $ffurl;
37}
38
8ee88311 39/**
5f8bdc17 40 * Fetches content of file from Internet (using proxy if defined). Uses cURL extension if present.
599f06cf 41 * Due to security concerns only downloads from http(s) sources are supported.
42 *
43 * @param string $url file url starting with http(s)://
5ef082df 44 * @param array $headers http headers, null if none. If set, should be an
45 * associative array of header name => value pairs.
6bf55889 46 * @param array $postdata array means use POST request with given parameters
47 * @param bool $fullresponse return headers, responses, etc in a similar way snoopy does
5ef082df 48 * (if false, just returns content)
49 * @param int $timeout timeout for complete download process including all file transfer
44e02d79 50 * (default 5 minutes)
51 * @param int $connecttimeout timeout for connection to server; this is the timeout that
52 * usually happens if the remote server is completely down (default 20 seconds);
53 * may not work when using proxy
83947a36 54 * @param bool $skipcertverify If true, the peer's SSL certificate will not be checked. Only use this when already in a trusted location.
8ee88311 55 * @return mixed false if request failed or content of the file as string if ok.
56 */
83947a36 57function download_file_content($url, $headers=null, $postdata=null, $fullresponse=false, $timeout=300, $connecttimeout=20, $skipcertverify=false) {
e27f0765 58 global $CFG;
59
599f06cf 60 // some extra security
61 $newlines = array("\r", "\n");
62 if (is_array($headers) ) {
63 foreach ($headers as $key => $value) {
64 $headers[$key] = str_replace($newlines, '', $value);
65 }
66 }
67 $url = str_replace($newlines, '', $url);
68 if (!preg_match('|^https?://|i', $url)) {
69 if ($fullresponse) {
70 $response = new object();
71 $response->status = 0;
72 $response->headers = array();
73 $response->response_code = 'Invalid protocol specified in url';
74 $response->results = '';
75 $response->error = 'Invalid protocol specified in url';
76 return $response;
77 } else {
78 return false;
79 }
80 }
81
15c31560 82 // check if proxy (if used) should be bypassed for this url
83 $proxybypass = is_proxybypass( $url );
599f06cf 84
6bf55889 85 if (!extension_loaded('curl') or ($ch = curl_init($url)) === false) {
5f8bdc17 86 require_once($CFG->libdir.'/snoopy/Snoopy.class.inc');
87 $snoopy = new Snoopy();
6bf55889 88 $snoopy->read_timeout = $timeout;
44e02d79 89 $snoopy->_fp_timeout = $connecttimeout;
15c31560 90 if (!$proxybypass) {
91 $snoopy->proxy_host = $CFG->proxyhost;
92 $snoopy->proxy_port = $CFG->proxyport;
93 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
94 // this will probably fail, but let's try it anyway
95 $snoopy->proxy_user = $CFG->proxyuser;
96 $snoopy->proxy_password = $CFG->proxypassword;
97 }
5f8bdc17 98 }
15c31560 99
6bf55889 100 if (is_array($headers) ) {
101 $client->rawheaders = $headers;
102 }
103
104 if (is_array($postdata)) {
105 $fetch = @$snoopy->fetch($url, $postdata); // use more specific debug code bellow
106 } else {
107 $fetch = @$snoopy->fetch($url); // use more specific debug code bellow
108 }
109
110 if ($fetch) {
111 if ($fullresponse) {
112 //fix header line endings
113 foreach ($snoopy->headers as $key=>$unused) {
114 $snoopy->headers[$key] = trim($snoopy->headers[$key]);
115 }
116 $response = new object();
117 $response->status = $snoopy->status;
118 $response->headers = $snoopy->headers;
119 $response->response_code = trim($snoopy->response_code);
120 $response->results = $snoopy->results;
121 $response->error = $snoopy->error;
122 return $response;
123
124 } else if ($snoopy->status != 200) {
5f8bdc17 125 debugging("Snoopy request for \"$url\" failed, http response code: ".$snoopy->response_code, DEBUG_ALL);
126 return false;
6bf55889 127
5f8bdc17 128 } else {
129 return $snoopy->results;
130 }
131 } else {
6bf55889 132 if ($fullresponse) {
133 $response = new object();
134 $response->status = $snoopy->status;
135 $response->headers = array();
136 $response->response_code = $snoopy->response_code;
137 $response->results = '';
138 $response->error = $snoopy->error;
139 return $response;
140 } else {
141 debugging("Snoopy request for \"$url\" failed with: ".$snoopy->error, DEBUG_ALL);
142 return false;
143 }
144 }
145 }
146
599f06cf 147 // set extra headers
6bf55889 148 if (is_array($headers) ) {
149 $headers2 = array();
150 foreach ($headers as $key => $value) {
6bf55889 151 $headers2[] = "$key: $value";
152 }
153 curl_setopt($ch, CURLOPT_HTTPHEADER, $headers2);
154 }
155
83947a36 156
157 if ($skipcertverify) {
158 curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
159 }
160
6bf55889 161 // use POST if requested
162 if (is_array($postdata)) {
163 foreach ($postdata as $k=>$v) {
164 $postdata[$k] = urlencode($k).'='.urlencode($v);
5f8bdc17 165 }
6bf55889 166 $postdata = implode('&', $postdata);
167 curl_setopt($ch, CURLOPT_POST, true);
168 curl_setopt($ch, CURLOPT_POSTFIELDS, $postdata);
5f8bdc17 169 }
170
8ee88311 171 curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
6bf55889 172 curl_setopt($ch, CURLOPT_HEADER, true);
44e02d79 173 curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $connecttimeout);
174 curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
6bf55889 175 if (!ini_get('open_basedir') and !ini_get('safe_mode')) {
599f06cf 176 // TODO: add version test for '7.10.5'
6bf55889 177 curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
178 curl_setopt($ch, CURLOPT_MAXREDIRS, 5);
179 }
180
15c31560 181 if (!empty($CFG->proxyhost) and !$proxybypass) {
5f8bdc17 182 // SOCKS supported in PHP5 only
183 if (!empty($CFG->proxytype) and ($CFG->proxytype == 'SOCKS5')) {
184 if (defined('CURLPROXY_SOCKS5')) {
185 curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
186 } else {
5f8bdc17 187 curl_close($ch);
599f06cf 188 if ($fullresponse) {
189 $response = new object();
190 $response->status = '0';
191 $response->headers = array();
192 $response->response_code = 'SOCKS5 proxy is not supported in PHP4';
193 $response->results = '';
194 $response->error = 'SOCKS5 proxy is not supported in PHP4';
195 return $response;
196 } else {
197 debugging("SOCKS5 proxy is not supported in PHP4.", DEBUG_ALL);
198 return false;
199 }
5f8bdc17 200 }
201 }
202
08ec989f 203 curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, false);
204
8ee88311 205 if (empty($CFG->proxyport)) {
e27f0765 206 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost);
8ee88311 207 } else {
e27f0765 208 curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport);
8ee88311 209 }
5f8bdc17 210
211 if (!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) {
8ee88311 212 curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword);
5f8bdc17 213 if (defined('CURLOPT_PROXYAUTH')) {
214 // any proxy authentication if PHP 5.1
215 curl_setopt($ch, CURLOPT_PROXYAUTH, CURLAUTH_BASIC | CURLAUTH_NTLM);
216 }
8ee88311 217 }
218 }
6bf55889 219
599f06cf 220 $data = curl_exec($ch);
08ec989f 221
599f06cf 222 // try to detect encoding problems
6bf55889 223 if ((curl_errno($ch) == 23 or curl_errno($ch) == 61) and defined('CURLOPT_ENCODING')) {
224 curl_setopt($ch, CURLOPT_ENCODING, 'none');
599f06cf 225 $data = curl_exec($ch);
6bf55889 226 }
227
08ec989f 228 if (curl_errno($ch)) {
6bf55889 229 $error = curl_error($ch);
230 $error_no = curl_errno($ch);
231 curl_close($ch);
232
233 if ($fullresponse) {
234 $response = new object();
235 if ($error_no == 28) {
236 $response->status = '-100'; // mimic snoopy
237 } else {
238 $response->status = '0';
239 }
240 $response->headers = array();
241 $response->response_code = $error;
242 $response->results = '';
243 $response->error = $error;
244 return $response;
245 } else {
599f06cf 246 debugging("cURL request for \"$url\" failed with: $error ($error_no)", DEBUG_ALL);
6bf55889 247 return false;
248 }
5f8bdc17 249
250 } else {
6bf55889 251 $info = curl_getinfo($ch);
252 curl_close($ch);
599f06cf 253
254 if (empty($info['http_code'])) {
255 // for security reasons we support only true http connections (Location: file:// exploit prevention)
256 $response = new object();
257 $response->status = '0';
258 $response->headers = array();
259 $response->response_code = 'Unknown cURL error';
260 $response->results = ''; // do NOT change this!
261 $response->error = 'Unknown cURL error';
262
263 } else {
264 // strip redirect headers and get headers array and content
265 $data = explode("\r\n\r\n", $data, $info['redirect_count'] + 2);
266 $results = array_pop($data);
267 $headers = array_pop($data);
268 $headers = explode("\r\n", trim($headers));
269
270 $response = new object();;
271 $response->status = (string)$info['http_code'];
272 $response->headers = $headers;
273 $response->response_code = $headers[0];
274 $response->results = $results;
275 $response->error = '';
276 }
6bf55889 277
278 if ($fullresponse) {
279 return $response;
280 } else if ($info['http_code'] != 200) {
599f06cf 281 debugging("cURL request for \"$url\" failed, HTTP response code: ".$response->response_code, DEBUG_ALL);
6bf55889 282 return false;
283 } else {
284 return $response->results;
5f8bdc17 285 }
08ec989f 286 }
8ee88311 287}
288
3ce73b14 289/**
76ca1ff1 290 * @return List of information about file types based on extensions.
3ce73b14 291 * Associative array of extension (lower-case) to associative array
292 * from 'element name' to data. Current element names are 'type' and 'icon'.
76ca1ff1 293 * Unknown types should use the 'xxx' entry which includes defaults.
3ce73b14 294 */
295function get_mimetypes_array() {
296 return array (
a370c895 297 'xxx' => array ('type'=>'document/unknown', 'icon'=>'unknown.gif'),
298 '3gp' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
299 'ai' => array ('type'=>'application/postscript', 'icon'=>'image.gif'),
300 'aif' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
301 'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
302 'aifc' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'),
303 'applescript' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
304 'asc' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
18bf47ef 305 'asm' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
a370c895 306 'au' => array ('type'=>'audio/au', 'icon'=>'audio.gif'),
307 'avi' => array ('type'=>'video/x-ms-wm', 'icon'=>'avi.gif'),
308 'bmp' => array ('type'=>'image/bmp', 'icon'=>'image.gif'),
18bf47ef 309 'c' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
a370c895 310 'cct' => array ('type'=>'shockwave/director', 'icon'=>'flash.gif'),
18bf47ef 311 'cpp' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
a370c895 312 'cs' => array ('type'=>'application/x-csh', 'icon'=>'text.gif'),
76ca1ff1 313 'css' => array ('type'=>'text/css', 'icon'=>'text.gif'),
6ae5e482 314 'csv' => array ('type'=>'text/csv', 'icon'=>'excel.gif'),
a370c895 315 'dv' => array ('type'=>'video/x-dv', 'icon'=>'video.gif'),
609d84e3 316 'dmg' => array ('type'=>'application/octet-stream', 'icon'=>'dmg.gif'),
a370c895 317 'doc' => array ('type'=>'application/msword', 'icon'=>'word.gif'),
68da9722 318 'docx' => array ('type'=>'application/msword', 'icon'=>'docx.gif'),
319 'docm' => array ('type'=>'application/msword', 'icon'=>'docm.gif'),
320 'dotx' => array ('type'=>'application/msword', 'icon'=>'dotx.gif'),
a370c895 321 'dcr' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
322 'dif' => array ('type'=>'video/x-dv', 'icon'=>'video.gif'),
323 'dir' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
324 'dxr' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
325 'eps' => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'),
ee7f231d 326 'fdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
759bc3c8 327 'flv' => array ('type'=>'video/x-flv', 'icon'=>'video.gif'),
a370c895 328 'gif' => array ('type'=>'image/gif', 'icon'=>'image.gif'),
329 'gtar' => array ('type'=>'application/x-gtar', 'icon'=>'zip.gif'),
759bc3c8 330 'tgz' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
a370c895 331 'gz' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
332 'gzip' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'),
333 'h' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
18bf47ef 334 'hpp' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
a370c895 335 'hqx' => array ('type'=>'application/mac-binhex40', 'icon'=>'zip.gif'),
70ee2841 336 'htc' => array ('type'=>'text/x-component', 'icon'=>'text.gif'),
a370c895 337 'html' => array ('type'=>'text/html', 'icon'=>'html.gif'),
1659a998 338 'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'html.gif'),
a370c895 339 'htm' => array ('type'=>'text/html', 'icon'=>'html.gif'),
08297dcb 340 'ico' => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image.gif'),
4b270c4c 341 'ics' => array ('type'=>'text/calendar', 'icon'=>'text.gif'),
08297dcb 342 'isf' => array ('type'=>'application/inspiration', 'icon'=>'isf.gif'),
343 'ist' => array ('type'=>'application/inspiration.template', 'icon'=>'isf.gif'),
18bf47ef 344 'java' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
a00420fb 345 'jcb' => array ('type'=>'text/xml', 'icon'=>'jcb.gif'),
346 'jcl' => array ('type'=>'text/xml', 'icon'=>'jcl.gif'),
347 'jcw' => array ('type'=>'text/xml', 'icon'=>'jcw.gif'),
348 'jmt' => array ('type'=>'text/xml', 'icon'=>'jmt.gif'),
349 'jmx' => array ('type'=>'text/xml', 'icon'=>'jmx.gif'),
a370c895 350 'jpe' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
351 'jpeg' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
352 'jpg' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'),
a00420fb 353 'jqz' => array ('type'=>'text/xml', 'icon'=>'jqz.gif'),
a370c895 354 'js' => array ('type'=>'application/x-javascript', 'icon'=>'text.gif'),
355 'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text.gif'),
356 'm' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
357 'mov' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
358 'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'video.gif'),
359 'm3u' => array ('type'=>'audio/x-mpegurl', 'icon'=>'audio.gif'),
360 'mp3' => array ('type'=>'audio/mp3', 'icon'=>'audio.gif'),
361 'mp4' => array ('type'=>'video/mp4', 'icon'=>'video.gif'),
362 'mpeg' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
363 'mpe' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
364 'mpg' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'),
5395334d 365
366 'odt' => array ('type'=>'application/vnd.oasis.opendocument.text', 'icon'=>'odt.gif'),
367 'ott' => array ('type'=>'application/vnd.oasis.opendocument.text-template', 'icon'=>'odt.gif'),
368 'oth' => array ('type'=>'application/vnd.oasis.opendocument.text-web', 'icon'=>'odt.gif'),
e10bc440 369 'odm' => array ('type'=>'application/vnd.oasis.opendocument.text-master', 'icon'=>'odm.gif'),
370 'odg' => array ('type'=>'application/vnd.oasis.opendocument.graphics', 'icon'=>'odg.gif'),
371 'otg' => array ('type'=>'application/vnd.oasis.opendocument.graphics-template', 'icon'=>'odg.gif'),
372 'odp' => array ('type'=>'application/vnd.oasis.opendocument.presentation', 'icon'=>'odp.gif'),
373 'otp' => array ('type'=>'application/vnd.oasis.opendocument.presentation-template', 'icon'=>'odp.gif'),
374 'ods' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet', 'icon'=>'ods.gif'),
375 'ots' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet-template', 'icon'=>'ods.gif'),
376 'odc' => array ('type'=>'application/vnd.oasis.opendocument.chart', 'icon'=>'odc.gif'),
377 'odf' => array ('type'=>'application/vnd.oasis.opendocument.formula', 'icon'=>'odf.gif'),
378 'odb' => array ('type'=>'application/vnd.oasis.opendocument.database', 'icon'=>'odb.gif'),
379 'odi' => array ('type'=>'application/vnd.oasis.opendocument.image', 'icon'=>'odi.gif'),
5395334d 380
a370c895 381 'pct' => array ('type'=>'image/pict', 'icon'=>'image.gif'),
382 'pdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
383 'php' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
384 'pic' => array ('type'=>'image/pict', 'icon'=>'image.gif'),
385 'pict' => array ('type'=>'image/pict', 'icon'=>'image.gif'),
386 'png' => array ('type'=>'image/png', 'icon'=>'image.gif'),
387 'pps' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'),
388 'ppt' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'),
68da9722 389 'pptx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptx.gif'),
390 'pptm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptm.gif'),
391 'potx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potx.gif'),
392 'potm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potm.gif'),
393 'ppam' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppam.gif'),
394 'ppsx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsx.gif'),
395 'ppsm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsm.gif'),
a370c895 396 'ps' => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'),
397 'qt' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'),
398 'ra' => array ('type'=>'audio/x-realaudio', 'icon'=>'audio.gif'),
399 'ram' => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'),
a00420fb 400 'rhb' => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
a370c895 401 'rm' => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'),
402 'rtf' => array ('type'=>'text/rtf', 'icon'=>'text.gif'),
403 'rtx' => array ('type'=>'text/richtext', 'icon'=>'text.gif'),
404 'sh' => array ('type'=>'application/x-sh', 'icon'=>'text.gif'),
405 'sit' => array ('type'=>'application/x-stuffit', 'icon'=>'zip.gif'),
406 'smi' => array ('type'=>'application/smil', 'icon'=>'text.gif'),
407 'smil' => array ('type'=>'application/smil', 'icon'=>'text.gif'),
a00420fb 408 'sqt' => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
4db69ffb 409 'svg' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),
410 'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'),
a370c895 411 'swa' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'),
412 'swf' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'),
413 'swfl' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'),
5395334d 414
415 'sxw' => array ('type'=>'application/vnd.sun.xml.writer', 'icon'=>'odt.gif'),
416 'stw' => array ('type'=>'application/vnd.sun.xml.writer.template', 'icon'=>'odt.gif'),
417 'sxc' => array ('type'=>'application/vnd.sun.xml.calc', 'icon'=>'odt.gif'),
418 'stc' => array ('type'=>'application/vnd.sun.xml.calc.template', 'icon'=>'odt.gif'),
419 'sxd' => array ('type'=>'application/vnd.sun.xml.draw', 'icon'=>'odt.gif'),
420 'std' => array ('type'=>'application/vnd.sun.xml.draw.template', 'icon'=>'odt.gif'),
421 'sxi' => array ('type'=>'application/vnd.sun.xml.impress', 'icon'=>'odt.gif'),
422 'sti' => array ('type'=>'application/vnd.sun.xml.impress.template', 'icon'=>'odt.gif'),
423 'sxg' => array ('type'=>'application/vnd.sun.xml.writer.global', 'icon'=>'odt.gif'),
424 'sxm' => array ('type'=>'application/vnd.sun.xml.math', 'icon'=>'odt.gif'),
425
a370c895 426 'tar' => array ('type'=>'application/x-tar', 'icon'=>'zip.gif'),
427 'tif' => array ('type'=>'image/tiff', 'icon'=>'image.gif'),
428 'tiff' => array ('type'=>'image/tiff', 'icon'=>'image.gif'),
429 'tex' => array ('type'=>'application/x-tex', 'icon'=>'text.gif'),
430 'texi' => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'),
431 'texinfo' => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'),
432 'tsv' => array ('type'=>'text/tab-separated-values', 'icon'=>'text.gif'),
433 'txt' => array ('type'=>'text/plain', 'icon'=>'text.gif'),
434 'wav' => array ('type'=>'audio/wav', 'icon'=>'audio.gif'),
435 'wmv' => array ('type'=>'video/x-ms-wmv', 'icon'=>'avi.gif'),
436 'asf' => array ('type'=>'video/x-ms-asf', 'icon'=>'avi.gif'),
ee7f231d 437 'xdp' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
438 'xfd' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
439 'xfdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'),
a370c895 440 'xls' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'excel.gif'),
68da9722 441 'xlsx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsx.gif'),
442 'xlsm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsm.gif'),
443 'xltx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltx.gif'),
444 'xltm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltm.gif'),
445 'xlsb' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsb.gif'),
446 'xlam' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlam.gif'),
a370c895 447 'xml' => array ('type'=>'application/xml', 'icon'=>'xml.gif'),
448 'xsl' => array ('type'=>'text/xml', 'icon'=>'xml.gif'),
449 'zip' => array ('type'=>'application/zip', 'icon'=>'zip.gif')
f1e0649c 450 );
3ce73b14 451}
452
76ca1ff1 453/**
3ce73b14 454 * Obtains information about a filetype based on its extension. Will
455 * use a default if no information is present about that particular
456 * extension.
76ca1ff1 457 * @param string $element Desired information (usually 'icon'
3ce73b14 458 * for icon filename or 'type' for MIME type)
76ca1ff1 459 * @param string $filename Filename we're looking up
3ce73b14 460 * @return string Requested piece of information from array
461 */
462function mimeinfo($element, $filename) {
f36cbf1d 463 static $mimeinfo = null;
464 if (is_null($mimeinfo)) {
465 $mimeinfo = get_mimetypes_array();
466 }
f1e0649c 467
a370c895 468 if (eregi('\.([a-z0-9]+)$', $filename, $match)) {
f1e0649c 469 if (isset($mimeinfo[strtolower($match[1])][$element])) {
470 return $mimeinfo[strtolower($match[1])][$element];
471 } else {
a370c895 472 return $mimeinfo['xxx'][$element]; // By default
f1e0649c 473 }
474 } else {
a370c895 475 return $mimeinfo['xxx'][$element]; // By default
f1e0649c 476 }
477}
478
76ca1ff1 479/**
3ce73b14 480 * Obtains information about a filetype based on the MIME type rather than
481 * the other way around.
482 * @param string $element Desired information (usually 'icon')
76ca1ff1 483 * @param string $mimetype MIME type we're looking up
3ce73b14 484 * @return string Requested piece of information from array
485 */
486function mimeinfo_from_type($element, $mimetype) {
487 static $mimeinfo;
488 $mimeinfo=get_mimetypes_array();
76ca1ff1 489
3ce73b14 490 foreach($mimeinfo as $values) {
491 if($values['type']==$mimetype) {
492 if(isset($values[$element])) {
493 return $values[$element];
494 }
495 break;
496 }
497 }
498 return $mimeinfo['xxx'][$element]; // Default
499}
b9709b76 500
42ead7d7 501/**
502 * Get information about a filetype based on the icon file.
503 * @param string $element Desired information (usually 'icon')
504 * @param string $icon Icon file path.
505 * @return string Requested piece of information from array
506 */
507function mimeinfo_from_icon($element, $icon) {
508 static $mimeinfo;
509 $mimeinfo=get_mimetypes_array();
510
511 if (preg_match("/\/(.*)/", $icon, $matches)) {
512 $icon = $matches[1];
513 }
514 $info = $mimeinfo['xxx'][$element]; // Default
515 foreach($mimeinfo as $values) {
516 if($values['icon']==$icon) {
517 if(isset($values[$element])) {
518 $info = $values[$element];
519 }
520 //No break, for example for 'excel.gif' we don't want 'csv'!
521 }
522 }
523 return $info;
524}
525
c0381e22 526/**
76ca1ff1 527 * Obtains descriptions for file types (e.g. 'Microsoft Word document') from the
528 * mimetypes.php language file.
c0381e22 529 * @param string $mimetype MIME type (can be obtained using the mimeinfo function)
530 * @param bool $capitalise If true, capitalises first character of result
76ca1ff1 531 * @return string Text description
c0381e22 532 */
533function get_mimetype_description($mimetype,$capitalise=false) {
534 $result=get_string($mimetype,'mimetypes');
535 // Surrounded by square brackets indicates that there isn't a string for that
536 // (maybe there is a better way to find this out?)
537 if(strpos($result,'[')===0) {
538 $result=get_string('document/unknown','mimetypes');
76ca1ff1 539 }
c0381e22 540 if($capitalise) {
541 $result=ucfirst($result);
542 }
543 return $result;
544}
545
76ca1ff1 546/**
547 * Handles the sending of file data to the user's browser, including support for
548 * byteranges etc.
ba75ad94 549 * @param string $path Path of file on disk (including real filename), or actual content of file as string
550 * @param string $filename Filename to send
551 * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours)
552 * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only
553 * @param bool $pathisstring If true (default false), $path is the content to send and not the pathname
554 * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin
555 * @param string $mimetype Include to specify the MIME type; leave blank to have it guess the type from $filename
b9709b76 556 */
ba75ad94 557function send_file($path, $filename, $lifetime=86400 , $filter=0, $pathisstring=false, $forcedownload=false, $mimetype='') {
6800d78e 558 global $CFG, $COURSE, $SESSION;
f1e0649c 559
ba4e0b05 560 // Use given MIME type if specified, otherwise guess it using mimeinfo.
561 // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O
562 // only Firefox saves all files locally before opening when content-disposition: attachment stated
563 $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested
76ca1ff1 564 $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' :
ba4e0b05 565 ($mimetype ? $mimetype : mimeinfo('type', $filename));
f1e0649c 566 $lastmodified = $pathisstring ? time() : filemtime($path);
567 $filesize = $pathisstring ? strlen($path) : filesize($path);
568
36bddcf5 569/* - MDL-13949
ee7f231d 570 //Adobe Acrobat Reader XSS prevention
571 if ($mimetype=='application/pdf' or mimeinfo('type', $filename)=='application/pdf') {
572 //please note that it prevents opening of pdfs in browser when http referer disabled
573 //or file linked from another site; browser caching of pdfs is now disabled too
c57d8874 574 if (!empty($_SERVER['HTTP_RANGE'])) {
575 //already byteserving
76ca1ff1 576 $lifetime = 1; // >0 needed for byteserving
c57d8874 577 } else if (empty($_SERVER['HTTP_REFERER']) or strpos($_SERVER['HTTP_REFERER'], $CFG->wwwroot)!==0) {
ee7f231d 578 $mimetype = 'application/x-forcedownload';
579 $forcedownload = true;
580 $lifetime = 0;
581 } else {
76ca1ff1 582 $lifetime = 1; // >0 needed for byteserving
ee7f231d 583 }
b8806ccc 584 }
36bddcf5 585*/
f3f7610c 586
69faecce 587 //IE compatibiltiy HACK!
4c8c65ec 588 if (ini_get('zlib.output_compression')) {
69faecce 589 ini_set('zlib.output_compression', 'Off');
590 }
591
4c8c65ec 592 //try to disable automatic sid rewrite in cookieless mode
8914cb82 593 @ini_set("session.use_trans_sid", "false");
4c8c65ec 594
595 //do not put '@' before the next header to detect incorrect moodle configurations,
596 //error should be better than "weird" empty lines for admins/users
597 //TODO: should we remove all those @ before the header()? Are all of the values supported on all servers?
598 header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT');
599
4f047de2 600 // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup
601 if (check_browser_version('MSIE')) {
4638009b 602 $filename = rawurlencode($filename);
4f047de2 603 }
604
4c8c65ec 605 if ($forcedownload) {
4638009b 606 @header('Content-Disposition: attachment; filename="'.$filename.'"');
4c8c65ec 607 } else {
4638009b 608 @header('Content-Disposition: inline; filename="'.$filename.'"');
4c8c65ec 609 }
610
f1e0649c 611 if ($lifetime > 0) {
4c8c65ec 612 @header('Cache-Control: max-age='.$lifetime);
613 @header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT');
f1e0649c 614 @header('Pragma: ');
4c8c65ec 615
616 if (empty($CFG->disablebyteserving) && !$pathisstring && $mimetype != 'text/plain' && $mimetype != 'text/html') {
617
618 @header('Accept-Ranges: bytes');
619
620 if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) {
621 // byteserving stuff - for acrobat reader and download accelerators
622 // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35
623 // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php
624 $ranges = false;
625 if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) {
626 foreach ($ranges as $key=>$value) {
627 if ($ranges[$key][1] == '') {
628 //suffix case
629 $ranges[$key][1] = $filesize - $ranges[$key][2];
630 $ranges[$key][2] = $filesize - 1;
631 } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) {
632 //fix range length
633 $ranges[$key][2] = $filesize - 1;
634 }
635 if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) {
636 //invalid byte-range ==> ignore header
637 $ranges = false;
638 break;
639 }
640 //prepare multipart header
641 $ranges[$key][0] = "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n";
642 $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n";
643 }
644 } else {
645 $ranges = false;
646 }
647 if ($ranges) {
648 byteserving_send_file($path, $mimetype, $ranges);
649 }
650 }
651 } else {
652 /// Do not byteserve (disabled, strings, text and html files).
653 @header('Accept-Ranges: none');
654 }
655 } else { // Do not cache files in proxies and browsers
85e00626 656 if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431
657 @header('Cache-Control: max-age=10');
4c8c65ec 658 @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
85e00626 659 @header('Pragma: ');
660 } else { //normal http - prevent caching at all cost
661 @header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
4c8c65ec 662 @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
85e00626 663 @header('Pragma: no-cache');
664 }
4c8c65ec 665 @header('Accept-Ranges: none'); // Do not allow byteserving when caching disabled
69faecce 666 }
f1e0649c 667
b9709b76 668 if (empty($filter)) {
4c8c65ec 669 if ($mimetype == 'text/html' && !empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
670 //cookieless mode - rewrite links
671 @header('Content-Type: text/html');
672 $path = $pathisstring ? $path : implode('', file($path));
6800d78e 673 $path = $SESSION->sid_ob_rewrite($path);
4c8c65ec 674 $filesize = strlen($path);
675 $pathisstring = true;
676 } else if ($mimetype == 'text/plain') {
810944af 677 @header('Content-Type: Text/plain; charset=utf-8'); //add encoding
f1e0649c 678 } else {
4c8c65ec 679 @header('Content-Type: '.$mimetype);
f1e0649c 680 }
4c8c65ec 681 @header('Content-Length: '.$filesize);
682 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
f1e0649c 683 if ($pathisstring) {
684 echo $path;
4c8c65ec 685 } else {
69faecce 686 readfile_chunked($path);
f1e0649c 687 }
688 } else { // Try to put the file through filters
f1e0649c 689 if ($mimetype == 'text/html') {
a17c57b5 690 $options = new object();
f1e0649c 691 $options->noclean = true;
a17c57b5 692 $options->nocache = true; // temporary workaround for MDL-5136
f1e0649c 693 $text = $pathisstring ? $path : implode('', file($path));
76ca1ff1 694
3ace5ee4 695 $text = file_modify_html_header($text);
60f9e36e 696 $output = format_text($text, FORMAT_HTML, $options, $COURSE->id);
4c8c65ec 697 if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
698 //cookieless mode - rewrite links
6800d78e 699 $output = $SESSION->sid_ob_rewrite($output);
4c8c65ec 700 }
f1e0649c 701
4c8c65ec 702 @header('Content-Length: '.strlen($output));
703 @header('Content-Type: text/html');
704 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
f1e0649c 705 echo $output;
b9709b76 706 // only filter text if filter all files is selected
707 } else if (($mimetype == 'text/plain') and ($filter == 1)) {
60f9e36e 708 $options = new object();
f1e0649c 709 $options->newlines = false;
710 $options->noclean = true;
711 $text = htmlentities($pathisstring ? $path : implode('', file($path)));
60f9e36e 712 $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>';
4c8c65ec 713 if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) {
714 //cookieless mode - rewrite links
6800d78e 715 $output = $SESSION->sid_ob_rewrite($output);
4c8c65ec 716 }
f1e0649c 717
4c8c65ec 718 @header('Content-Length: '.strlen($output));
810944af 719 @header('Content-Type: text/html; charset=utf-8'); //add encoding
4c8c65ec 720 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
f1e0649c 721 echo $output;
722 } else { // Just send it out raw
4c8c65ec 723 @header('Content-Length: '.$filesize);
724 @header('Content-Type: '.$mimetype);
725 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
f1e0649c 726 if ($pathisstring) {
727 echo $path;
728 }else {
69faecce 729 readfile_chunked($path);
f1e0649c 730 }
731 }
732 }
733 die; //no more chars to output!!!
734}
735
a43b5308 736function get_records_csv($file, $table) {
f33e1ed4 737 global $CFG, $DB;
599f38f9 738
f33e1ed4 739 if (!$metacolumns = $DB->get_columns($table)) {
599f38f9 740 return false;
741 }
742
a77b98eb 743 if(!($handle = @fopen($file, 'r'))) {
5a2a5331 744 print_error('get_records_csv failed to open '.$file);
599f38f9 745 }
746
747 $fieldnames = fgetcsv($handle, 4096);
748 if(empty($fieldnames)) {
749 fclose($handle);
750 return false;
751 }
752
753 $columns = array();
754
755 foreach($metacolumns as $metacolumn) {
756 $ord = array_search($metacolumn->name, $fieldnames);
757 if(is_int($ord)) {
758 $columns[$metacolumn->name] = $ord;
759 }
760 }
761
762 $rows = array();
763
764 while (($data = fgetcsv($handle, 4096)) !== false) {
765 $item = new stdClass;
766 foreach($columns as $name => $ord) {
767 $item->$name = $data[$ord];
768 }
769 $rows[] = $item;
770 }
771
772 fclose($handle);
773 return $rows;
774}
775
a77b98eb 776function put_records_csv($file, $records, $table = NULL) {
f33e1ed4 777 global $CFG, $DB;
a77b98eb 778
a1e93da2 779 if (empty($records)) {
a77b98eb 780 return true;
781 }
782
783 $metacolumns = NULL;
f33e1ed4 784 if ($table !== NULL && !$metacolumns = $DB->get_columns($table)) {
a77b98eb 785 return false;
786 }
787
a1e93da2 788 echo "x";
789
a77b98eb 790 if(!($fp = @fopen($CFG->dataroot.'/temp/'.$file, 'w'))) {
5a2a5331 791 print_error('put_records_csv failed to open '.$file);
a77b98eb 792 }
793
a43b5308 794 $proto = reset($records);
795 if(is_object($proto)) {
796 $fields_records = array_keys(get_object_vars($proto));
797 }
798 else if(is_array($proto)) {
799 $fields_records = array_keys($proto);
800 }
801 else {
802 return false;
803 }
a1e93da2 804 echo "x";
a77b98eb 805
806 if(!empty($metacolumns)) {
807 $fields_table = array_map(create_function('$a', 'return $a->name;'), $metacolumns);
808 $fields = array_intersect($fields_records, $fields_table);
809 }
810 else {
811 $fields = $fields_records;
812 }
813
814 fwrite($fp, implode(',', $fields));
815 fwrite($fp, "\r\n");
816
817 foreach($records as $record) {
a43b5308 818 $array = (array)$record;
a77b98eb 819 $values = array();
820 foreach($fields as $field) {
a43b5308 821 if(strpos($array[$field], ',')) {
822 $values[] = '"'.str_replace('"', '\"', $array[$field]).'"';
a77b98eb 823 }
824 else {
a43b5308 825 $values[] = $array[$field];
a77b98eb 826 }
827 }
828 fwrite($fp, implode(',', $values)."\r\n");
829 }
830
831 fclose($fp);
832 return true;
833}
834
f401cc97 835
34763a79 836/**
76ca1ff1 837 * Recursively delete the file or folder with path $location. That is,
34763a79 838 * if it is a file delete it. If it is a folder, delete all its content
76ca1ff1 839 * then delete it. If $location does not exist to start, that is not
840 * considered an error.
841 *
34763a79 842 * @param $location the path to remove.
843 */
4c8c65ec 844function fulldelete($location) {
f401cc97 845 if (is_dir($location)) {
846 $currdir = opendir($location);
847 while (false !== ($file = readdir($currdir))) {
848 if ($file <> ".." && $file <> ".") {
849 $fullfile = $location."/".$file;
4c8c65ec 850 if (is_dir($fullfile)) {
f401cc97 851 if (!fulldelete($fullfile)) {
852 return false;
853 }
854 } else {
855 if (!unlink($fullfile)) {
856 return false;
857 }
4c8c65ec 858 }
f401cc97 859 }
4c8c65ec 860 }
f401cc97 861 closedir($currdir);
862 if (! rmdir($location)) {
863 return false;
864 }
865
34763a79 866 } else if (file_exists($location)) {
f401cc97 867 if (!unlink($location)) {
868 return false;
869 }
870 }
871 return true;
872}
873
4c8c65ec 874/**
875 * Improves memory consumptions and works around buggy readfile() in PHP 5.0.4 (2MB readfile limit).
876 */
877function readfile_chunked($filename, $retbytes=true) {
878 $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
69faecce 879 $buffer = '';
76ca1ff1 880 $cnt =0;
69faecce 881 $handle = fopen($filename, 'rb');
882 if ($handle === false) {
883 return false;
884 }
20371063 885
69faecce 886 while (!feof($handle)) {
68913aec 887 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
69faecce 888 $buffer = fread($handle, $chunksize);
889 echo $buffer;
20371063 890 flush();
69faecce 891 if ($retbytes) {
4c8c65ec 892 $cnt += strlen($buffer);
893 }
69faecce 894 }
895 $status = fclose($handle);
896 if ($retbytes && $status) {
897 return $cnt; // return num. bytes delivered like readfile() does.
898 }
899 return $status;
900}
901
4c8c65ec 902/**
903 * Send requested byterange of file.
904 */
905function byteserving_send_file($filename, $mimetype, $ranges) {
906 $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB!
907 $handle = fopen($filename, 'rb');
908 if ($handle === false) {
909 die;
910 }
911 if (count($ranges) == 1) { //only one range requested
912 $length = $ranges[0][2] - $ranges[0][1] + 1;
913 @header('HTTP/1.1 206 Partial content');
914 @header('Content-Length: '.$length);
915 @header('Content-Range: bytes '.$ranges[0][1].'-'.$ranges[0][2].'/'.filesize($filename));
916 @header('Content-Type: '.$mimetype);
917 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
918 $buffer = '';
919 fseek($handle, $ranges[0][1]);
920 while (!feof($handle) && $length > 0) {
68913aec 921 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
4c8c65ec 922 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
923 echo $buffer;
924 flush();
925 $length -= strlen($buffer);
926 }
927 fclose($handle);
928 die;
929 } else { // multiple ranges requested - not tested much
930 $totallength = 0;
931 foreach($ranges as $range) {
aba588a7 932 $totallength += strlen($range[0]) + $range[2] - $range[1] + 1;
4c8c65ec 933 }
aba588a7 934 $totallength += strlen("\r\n--".BYTESERVING_BOUNDARY."--\r\n");
4c8c65ec 935 @header('HTTP/1.1 206 Partial content');
936 @header('Content-Length: '.$totallength);
937 @header('Content-Type: multipart/byteranges; boundary='.BYTESERVING_BOUNDARY);
938 //TODO: check if "multipart/x-byteranges" is more compatible with current readers/browsers/servers
939 while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite
940 foreach($ranges as $range) {
941 $length = $range[2] - $range[1] + 1;
942 echo $range[0];
943 $buffer = '';
944 fseek($handle, $range[1]);
945 while (!feof($handle) && $length > 0) {
68913aec 946 @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk
4c8c65ec 947 $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length));
948 echo $buffer;
949 flush();
950 $length -= strlen($buffer);
951 }
952 }
953 echo "\r\n--".BYTESERVING_BOUNDARY."--\r\n";
954 fclose($handle);
955 die;
956 }
957}
f401cc97 958
3ace5ee4 959/**
960 * add includes (js and css) into uploaded files
961 * before returning them, useful for themes and utf.js includes
962 * @param string text - text to search and replace
963 * @return string - text with added head includes
964 */
965function file_modify_html_header($text) {
966 // first look for <head> tag
967 global $CFG;
76ca1ff1 968
3ace5ee4 969 $stylesheetshtml = '';
970 foreach ($CFG->stylesheets as $stylesheet) {
971 $stylesheetshtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n";
76ca1ff1 972 }
973
3ace5ee4 974 $filters = explode(",", $CFG->textfilters);
975 if (in_array('filter/mediaplugin', $filters)) {
76ca1ff1 976 // this script is needed by most media filter plugins.
977 $ufo = "\n".'<script type="text/javascript" src="'.$CFG->wwwroot.'/lib/ufo.js"></script>'."\n";
3ace5ee4 978 } else {
76ca1ff1 979 $ufo = '';
3ace5ee4 980 }
76ca1ff1 981
3ace5ee4 982 preg_match('/\<head\>|\<HEAD\>/', $text, $matches);
983 if ($matches) {
984 $replacement = '<head>'.$ufo.$stylesheetshtml;
985 $text = preg_replace('/\<head\>|\<HEAD\>/', $replacement, $text, 1);
76ca1ff1 986 return $text;
3ace5ee4 987 }
76ca1ff1 988
3ace5ee4 989 // if not, look for <html> tag, and stick <head> right after
990 preg_match('/\<html\>|\<HTML\>/', $text, $matches);
991 if ($matches) {
992 // replace <html> tag with <html><head>includes</head>
13534ef7 993 $replacement = '<html>'."\n".'<head>'.$ufo.$stylesheetshtml.'</head>';
3ace5ee4 994 $text = preg_replace('/\<html\>|\<HTML\>/', $replacement, $text, 1);
76ca1ff1 995 return $text;
3ace5ee4 996 }
76ca1ff1 997
3ace5ee4 998 // if not, look for <body> tag, and stick <head> before body
999 preg_match('/\<body\>|\<BODY\>/', $text, $matches);
1000 if ($matches) {
13534ef7 1001 $replacement = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".'<body>';
3ace5ee4 1002 $text = preg_replace('/\<body\>|\<BODY\>/', $replacement, $text, 1);
76ca1ff1 1003 return $text;
1004 }
1005
3ace5ee4 1006 // if not, just stick a <head> tag at the beginning
1007 $text = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".$text;
1008 return $text;
1009}
1010
a77b98eb 1011?>