599f38f9 |
1 | <?php //$Id$ |
2 | |
8ee88311 |
3 | require_once($CFG->libdir.'/libcurlemu/libcurlemu.inc.php'); // might be moved to setup.php later |
4 | |
4c8c65ec |
5 | define('BYTESERVING_BOUNDARY', 's1k2o3d4a5k6s7'); //unique string constant |
6 | |
8ee88311 |
7 | /** |
8 | * Fetches content of file from Internet (using proxy if defined). |
9 | * |
10 | * @return mixed false if request failed or content of the file as string if ok. |
11 | */ |
12 | function download_file_content($url) { |
e27f0765 |
13 | global $CFG; |
14 | |
8ee88311 |
15 | $ch = curl_init($url); |
16 | curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); |
17 | curl_setopt($ch, CURLOPT_HEADER, false); |
18 | if (!empty($CFG->proxyhost)) { |
08ec989f |
19 | // don't CONNECT for non-https connections |
20 | curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, false); |
21 | |
8ee88311 |
22 | if (empty($CFG->proxyport)) { |
e27f0765 |
23 | curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost); |
8ee88311 |
24 | } else { |
e27f0765 |
25 | curl_setopt($ch, CURLOPT_PROXY, $CFG->proxyhost.':'.$CFG->proxyport); |
8ee88311 |
26 | } |
27 | if(!empty($CFG->proxyuser) and !empty($CFG->proxypassword)) { |
28 | curl_setopt($ch, CURLOPT_PROXYUSERPWD, $CFG->proxyuser.':'.$CFG->proxypassword); |
29 | } |
30 | } |
31 | $result = curl_exec($ch); |
08ec989f |
32 | |
33 | if (curl_errno($ch)) { |
34 | $curlerror = "CURL request for \"$url\" failed with: ". curl_error($ch); |
35 | debugging($curlerror, DEBUG_DEVELOPER); |
36 | } |
37 | |
8ee88311 |
38 | curl_close($ch); |
39 | return $result; |
40 | } |
41 | |
3ce73b14 |
42 | /** |
76ca1ff1 |
43 | * @return List of information about file types based on extensions. |
3ce73b14 |
44 | * Associative array of extension (lower-case) to associative array |
45 | * from 'element name' to data. Current element names are 'type' and 'icon'. |
76ca1ff1 |
46 | * Unknown types should use the 'xxx' entry which includes defaults. |
3ce73b14 |
47 | */ |
48 | function get_mimetypes_array() { |
49 | return array ( |
a370c895 |
50 | 'xxx' => array ('type'=>'document/unknown', 'icon'=>'unknown.gif'), |
51 | '3gp' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'), |
52 | 'ai' => array ('type'=>'application/postscript', 'icon'=>'image.gif'), |
53 | 'aif' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'), |
54 | 'aiff' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'), |
55 | 'aifc' => array ('type'=>'audio/x-aiff', 'icon'=>'audio.gif'), |
56 | 'applescript' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
57 | 'asc' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
18bf47ef |
58 | 'asm' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
a370c895 |
59 | 'au' => array ('type'=>'audio/au', 'icon'=>'audio.gif'), |
60 | 'avi' => array ('type'=>'video/x-ms-wm', 'icon'=>'avi.gif'), |
61 | 'bmp' => array ('type'=>'image/bmp', 'icon'=>'image.gif'), |
18bf47ef |
62 | 'c' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
a370c895 |
63 | 'cct' => array ('type'=>'shockwave/director', 'icon'=>'flash.gif'), |
18bf47ef |
64 | 'cpp' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
a370c895 |
65 | 'cs' => array ('type'=>'application/x-csh', 'icon'=>'text.gif'), |
76ca1ff1 |
66 | 'css' => array ('type'=>'text/css', 'icon'=>'text.gif'), |
6ae5e482 |
67 | 'csv' => array ('type'=>'text/csv', 'icon'=>'excel.gif'), |
a370c895 |
68 | 'dv' => array ('type'=>'video/x-dv', 'icon'=>'video.gif'), |
609d84e3 |
69 | 'dmg' => array ('type'=>'application/octet-stream', 'icon'=>'dmg.gif'), |
a370c895 |
70 | 'doc' => array ('type'=>'application/msword', 'icon'=>'word.gif'), |
68da9722 |
71 | 'docx' => array ('type'=>'application/msword', 'icon'=>'docx.gif'), |
72 | 'docm' => array ('type'=>'application/msword', 'icon'=>'docm.gif'), |
73 | 'dotx' => array ('type'=>'application/msword', 'icon'=>'dotx.gif'), |
a370c895 |
74 | 'dcr' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'), |
75 | 'dif' => array ('type'=>'video/x-dv', 'icon'=>'video.gif'), |
76 | 'dir' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'), |
77 | 'dxr' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'), |
78 | 'eps' => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'), |
ee7f231d |
79 | 'fdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'), |
759bc3c8 |
80 | 'flv' => array ('type'=>'video/x-flv', 'icon'=>'video.gif'), |
a370c895 |
81 | 'gif' => array ('type'=>'image/gif', 'icon'=>'image.gif'), |
82 | 'gtar' => array ('type'=>'application/x-gtar', 'icon'=>'zip.gif'), |
759bc3c8 |
83 | 'tgz' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'), |
a370c895 |
84 | 'gz' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'), |
85 | 'gzip' => array ('type'=>'application/g-zip', 'icon'=>'zip.gif'), |
86 | 'h' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
18bf47ef |
87 | 'hpp' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
a370c895 |
88 | 'hqx' => array ('type'=>'application/mac-binhex40', 'icon'=>'zip.gif'), |
70ee2841 |
89 | 'htc' => array ('type'=>'text/x-component', 'icon'=>'text.gif'), |
a370c895 |
90 | 'html' => array ('type'=>'text/html', 'icon'=>'html.gif'), |
1659a998 |
91 | 'xhtml'=> array ('type'=>'application/xhtml+xml', 'icon'=>'html.gif'), |
a370c895 |
92 | 'htm' => array ('type'=>'text/html', 'icon'=>'html.gif'), |
08297dcb |
93 | 'ico' => array ('type'=>'image/vnd.microsoft.icon', 'icon'=>'image.gif'), |
94 | 'isf' => array ('type'=>'application/inspiration', 'icon'=>'isf.gif'), |
95 | 'ist' => array ('type'=>'application/inspiration.template', 'icon'=>'isf.gif'), |
18bf47ef |
96 | 'java' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
a00420fb |
97 | 'jcb' => array ('type'=>'text/xml', 'icon'=>'jcb.gif'), |
98 | 'jcl' => array ('type'=>'text/xml', 'icon'=>'jcl.gif'), |
99 | 'jcw' => array ('type'=>'text/xml', 'icon'=>'jcw.gif'), |
100 | 'jmt' => array ('type'=>'text/xml', 'icon'=>'jmt.gif'), |
101 | 'jmx' => array ('type'=>'text/xml', 'icon'=>'jmx.gif'), |
a370c895 |
102 | 'jpe' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'), |
103 | 'jpeg' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'), |
104 | 'jpg' => array ('type'=>'image/jpeg', 'icon'=>'image.gif'), |
a00420fb |
105 | 'jqz' => array ('type'=>'text/xml', 'icon'=>'jqz.gif'), |
a370c895 |
106 | 'js' => array ('type'=>'application/x-javascript', 'icon'=>'text.gif'), |
107 | 'latex'=> array ('type'=>'application/x-latex', 'icon'=>'text.gif'), |
108 | 'm' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
109 | 'mov' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'), |
110 | 'movie'=> array ('type'=>'video/x-sgi-movie', 'icon'=>'video.gif'), |
111 | 'm3u' => array ('type'=>'audio/x-mpegurl', 'icon'=>'audio.gif'), |
112 | 'mp3' => array ('type'=>'audio/mp3', 'icon'=>'audio.gif'), |
113 | 'mp4' => array ('type'=>'video/mp4', 'icon'=>'video.gif'), |
114 | 'mpeg' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'), |
115 | 'mpe' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'), |
116 | 'mpg' => array ('type'=>'video/mpeg', 'icon'=>'video.gif'), |
5395334d |
117 | |
118 | 'odt' => array ('type'=>'application/vnd.oasis.opendocument.text', 'icon'=>'odt.gif'), |
119 | 'ott' => array ('type'=>'application/vnd.oasis.opendocument.text-template', 'icon'=>'odt.gif'), |
120 | 'oth' => array ('type'=>'application/vnd.oasis.opendocument.text-web', 'icon'=>'odt.gif'), |
e10bc440 |
121 | 'odm' => array ('type'=>'application/vnd.oasis.opendocument.text-master', 'icon'=>'odm.gif'), |
122 | 'odg' => array ('type'=>'application/vnd.oasis.opendocument.graphics', 'icon'=>'odg.gif'), |
123 | 'otg' => array ('type'=>'application/vnd.oasis.opendocument.graphics-template', 'icon'=>'odg.gif'), |
124 | 'odp' => array ('type'=>'application/vnd.oasis.opendocument.presentation', 'icon'=>'odp.gif'), |
125 | 'otp' => array ('type'=>'application/vnd.oasis.opendocument.presentation-template', 'icon'=>'odp.gif'), |
126 | 'ods' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet', 'icon'=>'ods.gif'), |
127 | 'ots' => array ('type'=>'application/vnd.oasis.opendocument.spreadsheet-template', 'icon'=>'ods.gif'), |
128 | 'odc' => array ('type'=>'application/vnd.oasis.opendocument.chart', 'icon'=>'odc.gif'), |
129 | 'odf' => array ('type'=>'application/vnd.oasis.opendocument.formula', 'icon'=>'odf.gif'), |
130 | 'odb' => array ('type'=>'application/vnd.oasis.opendocument.database', 'icon'=>'odb.gif'), |
131 | 'odi' => array ('type'=>'application/vnd.oasis.opendocument.image', 'icon'=>'odi.gif'), |
5395334d |
132 | |
a370c895 |
133 | 'pct' => array ('type'=>'image/pict', 'icon'=>'image.gif'), |
134 | 'pdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'), |
135 | 'php' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
136 | 'pic' => array ('type'=>'image/pict', 'icon'=>'image.gif'), |
137 | 'pict' => array ('type'=>'image/pict', 'icon'=>'image.gif'), |
138 | 'png' => array ('type'=>'image/png', 'icon'=>'image.gif'), |
139 | 'pps' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'), |
140 | 'ppt' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'powerpoint.gif'), |
68da9722 |
141 | 'pptx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptx.gif'), |
142 | 'pptm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'pptm.gif'), |
143 | 'potx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potx.gif'), |
144 | 'potm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'potm.gif'), |
145 | 'ppam' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppam.gif'), |
146 | 'ppsx' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsx.gif'), |
147 | 'ppsm' => array ('type'=>'application/vnd.ms-powerpoint', 'icon'=>'ppsm.gif'), |
a370c895 |
148 | 'ps' => array ('type'=>'application/postscript', 'icon'=>'pdf.gif'), |
149 | 'qt' => array ('type'=>'video/quicktime', 'icon'=>'video.gif'), |
150 | 'ra' => array ('type'=>'audio/x-realaudio', 'icon'=>'audio.gif'), |
151 | 'ram' => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'), |
a00420fb |
152 | 'rhb' => array ('type'=>'text/xml', 'icon'=>'xml.gif'), |
a370c895 |
153 | 'rm' => array ('type'=>'audio/x-pn-realaudio', 'icon'=>'audio.gif'), |
154 | 'rtf' => array ('type'=>'text/rtf', 'icon'=>'text.gif'), |
155 | 'rtx' => array ('type'=>'text/richtext', 'icon'=>'text.gif'), |
156 | 'sh' => array ('type'=>'application/x-sh', 'icon'=>'text.gif'), |
157 | 'sit' => array ('type'=>'application/x-stuffit', 'icon'=>'zip.gif'), |
158 | 'smi' => array ('type'=>'application/smil', 'icon'=>'text.gif'), |
159 | 'smil' => array ('type'=>'application/smil', 'icon'=>'text.gif'), |
a00420fb |
160 | 'sqt' => array ('type'=>'text/xml', 'icon'=>'xml.gif'), |
4db69ffb |
161 | 'svg' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'), |
162 | 'svgz' => array ('type'=>'image/svg+xml', 'icon'=>'image.gif'), |
a370c895 |
163 | 'swa' => array ('type'=>'application/x-director', 'icon'=>'flash.gif'), |
164 | 'swf' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'), |
165 | 'swfl' => array ('type'=>'application/x-shockwave-flash', 'icon'=>'flash.gif'), |
5395334d |
166 | |
167 | 'sxw' => array ('type'=>'application/vnd.sun.xml.writer', 'icon'=>'odt.gif'), |
168 | 'stw' => array ('type'=>'application/vnd.sun.xml.writer.template', 'icon'=>'odt.gif'), |
169 | 'sxc' => array ('type'=>'application/vnd.sun.xml.calc', 'icon'=>'odt.gif'), |
170 | 'stc' => array ('type'=>'application/vnd.sun.xml.calc.template', 'icon'=>'odt.gif'), |
171 | 'sxd' => array ('type'=>'application/vnd.sun.xml.draw', 'icon'=>'odt.gif'), |
172 | 'std' => array ('type'=>'application/vnd.sun.xml.draw.template', 'icon'=>'odt.gif'), |
173 | 'sxi' => array ('type'=>'application/vnd.sun.xml.impress', 'icon'=>'odt.gif'), |
174 | 'sti' => array ('type'=>'application/vnd.sun.xml.impress.template', 'icon'=>'odt.gif'), |
175 | 'sxg' => array ('type'=>'application/vnd.sun.xml.writer.global', 'icon'=>'odt.gif'), |
176 | 'sxm' => array ('type'=>'application/vnd.sun.xml.math', 'icon'=>'odt.gif'), |
177 | |
a370c895 |
178 | 'tar' => array ('type'=>'application/x-tar', 'icon'=>'zip.gif'), |
179 | 'tif' => array ('type'=>'image/tiff', 'icon'=>'image.gif'), |
180 | 'tiff' => array ('type'=>'image/tiff', 'icon'=>'image.gif'), |
181 | 'tex' => array ('type'=>'application/x-tex', 'icon'=>'text.gif'), |
182 | 'texi' => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'), |
183 | 'texinfo' => array ('type'=>'application/x-texinfo', 'icon'=>'text.gif'), |
184 | 'tsv' => array ('type'=>'text/tab-separated-values', 'icon'=>'text.gif'), |
185 | 'txt' => array ('type'=>'text/plain', 'icon'=>'text.gif'), |
186 | 'wav' => array ('type'=>'audio/wav', 'icon'=>'audio.gif'), |
187 | 'wmv' => array ('type'=>'video/x-ms-wmv', 'icon'=>'avi.gif'), |
188 | 'asf' => array ('type'=>'video/x-ms-asf', 'icon'=>'avi.gif'), |
ee7f231d |
189 | 'xdp' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'), |
190 | 'xfd' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'), |
191 | 'xfdf' => array ('type'=>'application/pdf', 'icon'=>'pdf.gif'), |
a370c895 |
192 | 'xls' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'excel.gif'), |
68da9722 |
193 | 'xlsx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsx.gif'), |
194 | 'xlsm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsm.gif'), |
195 | 'xltx' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltx.gif'), |
196 | 'xltm' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xltm.gif'), |
197 | 'xlsb' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlsb.gif'), |
198 | 'xlam' => array ('type'=>'application/vnd.ms-excel', 'icon'=>'xlam.gif'), |
a370c895 |
199 | 'xml' => array ('type'=>'application/xml', 'icon'=>'xml.gif'), |
200 | 'xsl' => array ('type'=>'text/xml', 'icon'=>'xml.gif'), |
201 | 'zip' => array ('type'=>'application/zip', 'icon'=>'zip.gif') |
f1e0649c |
202 | ); |
3ce73b14 |
203 | } |
204 | |
76ca1ff1 |
205 | /** |
3ce73b14 |
206 | * Obtains information about a filetype based on its extension. Will |
207 | * use a default if no information is present about that particular |
208 | * extension. |
76ca1ff1 |
209 | * @param string $element Desired information (usually 'icon' |
3ce73b14 |
210 | * for icon filename or 'type' for MIME type) |
76ca1ff1 |
211 | * @param string $filename Filename we're looking up |
3ce73b14 |
212 | * @return string Requested piece of information from array |
213 | */ |
214 | function mimeinfo($element, $filename) { |
215 | static $mimeinfo; |
216 | $mimeinfo=get_mimetypes_array(); |
f1e0649c |
217 | |
a370c895 |
218 | if (eregi('\.([a-z0-9]+)$', $filename, $match)) { |
f1e0649c |
219 | if (isset($mimeinfo[strtolower($match[1])][$element])) { |
220 | return $mimeinfo[strtolower($match[1])][$element]; |
221 | } else { |
a370c895 |
222 | return $mimeinfo['xxx'][$element]; // By default |
f1e0649c |
223 | } |
224 | } else { |
a370c895 |
225 | return $mimeinfo['xxx'][$element]; // By default |
f1e0649c |
226 | } |
227 | } |
228 | |
76ca1ff1 |
229 | /** |
3ce73b14 |
230 | * Obtains information about a filetype based on the MIME type rather than |
231 | * the other way around. |
232 | * @param string $element Desired information (usually 'icon') |
76ca1ff1 |
233 | * @param string $mimetype MIME type we're looking up |
3ce73b14 |
234 | * @return string Requested piece of information from array |
235 | */ |
236 | function mimeinfo_from_type($element, $mimetype) { |
237 | static $mimeinfo; |
238 | $mimeinfo=get_mimetypes_array(); |
76ca1ff1 |
239 | |
3ce73b14 |
240 | foreach($mimeinfo as $values) { |
241 | if($values['type']==$mimetype) { |
242 | if(isset($values[$element])) { |
243 | return $values[$element]; |
244 | } |
245 | break; |
246 | } |
247 | } |
248 | return $mimeinfo['xxx'][$element]; // Default |
249 | } |
b9709b76 |
250 | |
42ead7d7 |
251 | /** |
252 | * Get information about a filetype based on the icon file. |
253 | * @param string $element Desired information (usually 'icon') |
254 | * @param string $icon Icon file path. |
255 | * @return string Requested piece of information from array |
256 | */ |
257 | function mimeinfo_from_icon($element, $icon) { |
258 | static $mimeinfo; |
259 | $mimeinfo=get_mimetypes_array(); |
260 | |
261 | if (preg_match("/\/(.*)/", $icon, $matches)) { |
262 | $icon = $matches[1]; |
263 | } |
264 | $info = $mimeinfo['xxx'][$element]; // Default |
265 | foreach($mimeinfo as $values) { |
266 | if($values['icon']==$icon) { |
267 | if(isset($values[$element])) { |
268 | $info = $values[$element]; |
269 | } |
270 | //No break, for example for 'excel.gif' we don't want 'csv'! |
271 | } |
272 | } |
273 | return $info; |
274 | } |
275 | |
c0381e22 |
276 | /** |
76ca1ff1 |
277 | * Obtains descriptions for file types (e.g. 'Microsoft Word document') from the |
278 | * mimetypes.php language file. |
c0381e22 |
279 | * @param string $mimetype MIME type (can be obtained using the mimeinfo function) |
280 | * @param bool $capitalise If true, capitalises first character of result |
76ca1ff1 |
281 | * @return string Text description |
c0381e22 |
282 | */ |
283 | function get_mimetype_description($mimetype,$capitalise=false) { |
284 | $result=get_string($mimetype,'mimetypes'); |
285 | // Surrounded by square brackets indicates that there isn't a string for that |
286 | // (maybe there is a better way to find this out?) |
287 | if(strpos($result,'[')===0) { |
288 | $result=get_string('document/unknown','mimetypes'); |
76ca1ff1 |
289 | } |
c0381e22 |
290 | if($capitalise) { |
291 | $result=ucfirst($result); |
292 | } |
293 | return $result; |
294 | } |
295 | |
76ca1ff1 |
296 | /** |
297 | * Handles the sending of file data to the user's browser, including support for |
298 | * byteranges etc. |
ba75ad94 |
299 | * @param string $path Path of file on disk (including real filename), or actual content of file as string |
300 | * @param string $filename Filename to send |
301 | * @param int $lifetime Number of seconds before the file should expire from caches (default 24 hours) |
302 | * @param int $filter 0 (default)=no filtering, 1=all files, 2=html files only |
303 | * @param bool $pathisstring If true (default false), $path is the content to send and not the pathname |
304 | * @param bool $forcedownload If true (default false), forces download of file rather than view in browser/plugin |
305 | * @param string $mimetype Include to specify the MIME type; leave blank to have it guess the type from $filename |
b9709b76 |
306 | */ |
ba75ad94 |
307 | function send_file($path, $filename, $lifetime=86400 , $filter=0, $pathisstring=false, $forcedownload=false, $mimetype='') { |
60f9e36e |
308 | global $CFG, $COURSE; |
f1e0649c |
309 | |
ba4e0b05 |
310 | // Use given MIME type if specified, otherwise guess it using mimeinfo. |
311 | // IE, Konqueror and Opera open html file directly in browser from web even when directed to save it to disk :-O |
312 | // only Firefox saves all files locally before opening when content-disposition: attachment stated |
313 | $isFF = check_browser_version('Firefox', '1.5'); // only FF > 1.5 properly tested |
76ca1ff1 |
314 | $mimetype = ($forcedownload and !$isFF) ? 'application/x-forcedownload' : |
ba4e0b05 |
315 | ($mimetype ? $mimetype : mimeinfo('type', $filename)); |
f1e0649c |
316 | $lastmodified = $pathisstring ? time() : filemtime($path); |
317 | $filesize = $pathisstring ? strlen($path) : filesize($path); |
318 | |
ee7f231d |
319 | //Adobe Acrobat Reader XSS prevention |
320 | if ($mimetype=='application/pdf' or mimeinfo('type', $filename)=='application/pdf') { |
321 | //please note that it prevents opening of pdfs in browser when http referer disabled |
322 | //or file linked from another site; browser caching of pdfs is now disabled too |
c57d8874 |
323 | if (!empty($_SERVER['HTTP_RANGE'])) { |
324 | //already byteserving |
76ca1ff1 |
325 | $lifetime = 1; // >0 needed for byteserving |
c57d8874 |
326 | } else if (empty($_SERVER['HTTP_REFERER']) or strpos($_SERVER['HTTP_REFERER'], $CFG->wwwroot)!==0) { |
ee7f231d |
327 | $mimetype = 'application/x-forcedownload'; |
328 | $forcedownload = true; |
329 | $lifetime = 0; |
330 | } else { |
76ca1ff1 |
331 | $lifetime = 1; // >0 needed for byteserving |
ee7f231d |
332 | } |
b8806ccc |
333 | } |
f3f7610c |
334 | |
69faecce |
335 | //IE compatibiltiy HACK! |
4c8c65ec |
336 | if (ini_get('zlib.output_compression')) { |
69faecce |
337 | ini_set('zlib.output_compression', 'Off'); |
338 | } |
339 | |
4c8c65ec |
340 | //try to disable automatic sid rewrite in cookieless mode |
8914cb82 |
341 | @ini_set("session.use_trans_sid", "false"); |
4c8c65ec |
342 | |
343 | //do not put '@' before the next header to detect incorrect moodle configurations, |
344 | //error should be better than "weird" empty lines for admins/users |
345 | //TODO: should we remove all those @ before the header()? Are all of the values supported on all servers? |
346 | header('Last-Modified: '. gmdate('D, d M Y H:i:s', $lastmodified) .' GMT'); |
347 | |
4f047de2 |
348 | // if user is using IE, urlencode the filename so that multibyte file name will show up correctly on popup |
349 | if (check_browser_version('MSIE')) { |
350 | $filename = urlencode($filename); |
351 | } |
352 | |
4c8c65ec |
353 | if ($forcedownload) { |
354 | @header('Content-Disposition: attachment; filename='.$filename); |
355 | } else { |
356 | @header('Content-Disposition: inline; filename='.$filename); |
357 | } |
358 | |
f1e0649c |
359 | if ($lifetime > 0) { |
4c8c65ec |
360 | @header('Cache-Control: max-age='.$lifetime); |
361 | @header('Expires: '. gmdate('D, d M Y H:i:s', time() + $lifetime) .' GMT'); |
f1e0649c |
362 | @header('Pragma: '); |
4c8c65ec |
363 | |
364 | if (empty($CFG->disablebyteserving) && !$pathisstring && $mimetype != 'text/plain' && $mimetype != 'text/html') { |
365 | |
366 | @header('Accept-Ranges: bytes'); |
367 | |
368 | if (!empty($_SERVER['HTTP_RANGE']) && strpos($_SERVER['HTTP_RANGE'],'bytes=') !== FALSE) { |
369 | // byteserving stuff - for acrobat reader and download accelerators |
370 | // see: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35 |
371 | // inspired by: http://www.coneural.org/florian/papers/04_byteserving.php |
372 | $ranges = false; |
373 | if (preg_match_all('/(\d*)-(\d*)/', $_SERVER['HTTP_RANGE'], $ranges, PREG_SET_ORDER)) { |
374 | foreach ($ranges as $key=>$value) { |
375 | if ($ranges[$key][1] == '') { |
376 | //suffix case |
377 | $ranges[$key][1] = $filesize - $ranges[$key][2]; |
378 | $ranges[$key][2] = $filesize - 1; |
379 | } else if ($ranges[$key][2] == '' || $ranges[$key][2] > $filesize - 1) { |
380 | //fix range length |
381 | $ranges[$key][2] = $filesize - 1; |
382 | } |
383 | if ($ranges[$key][2] != '' && $ranges[$key][2] < $ranges[$key][1]) { |
384 | //invalid byte-range ==> ignore header |
385 | $ranges = false; |
386 | break; |
387 | } |
388 | //prepare multipart header |
389 | $ranges[$key][0] = "\r\n--".BYTESERVING_BOUNDARY."\r\nContent-Type: $mimetype\r\n"; |
390 | $ranges[$key][0] .= "Content-Range: bytes {$ranges[$key][1]}-{$ranges[$key][2]}/$filesize\r\n\r\n"; |
391 | } |
392 | } else { |
393 | $ranges = false; |
394 | } |
395 | if ($ranges) { |
396 | byteserving_send_file($path, $mimetype, $ranges); |
397 | } |
398 | } |
399 | } else { |
400 | /// Do not byteserve (disabled, strings, text and html files). |
401 | @header('Accept-Ranges: none'); |
402 | } |
403 | } else { // Do not cache files in proxies and browsers |
85e00626 |
404 | if (strpos($CFG->wwwroot, 'https://') === 0) { //https sites - watch out for IE! KB812935 and KB316431 |
405 | @header('Cache-Control: max-age=10'); |
4c8c65ec |
406 | @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT'); |
85e00626 |
407 | @header('Pragma: '); |
408 | } else { //normal http - prevent caching at all cost |
409 | @header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0'); |
4c8c65ec |
410 | @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT'); |
85e00626 |
411 | @header('Pragma: no-cache'); |
412 | } |
4c8c65ec |
413 | @header('Accept-Ranges: none'); // Do not allow byteserving when caching disabled |
69faecce |
414 | } |
f1e0649c |
415 | |
b9709b76 |
416 | if (empty($filter)) { |
4c8c65ec |
417 | if ($mimetype == 'text/html' && !empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) { |
418 | //cookieless mode - rewrite links |
419 | @header('Content-Type: text/html'); |
420 | $path = $pathisstring ? $path : implode('', file($path)); |
421 | $path = sid_ob_rewrite($path); |
422 | $filesize = strlen($path); |
423 | $pathisstring = true; |
424 | } else if ($mimetype == 'text/plain') { |
810944af |
425 | @header('Content-Type: Text/plain; charset=utf-8'); //add encoding |
f1e0649c |
426 | } else { |
4c8c65ec |
427 | @header('Content-Type: '.$mimetype); |
f1e0649c |
428 | } |
4c8c65ec |
429 | @header('Content-Length: '.$filesize); |
430 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
f1e0649c |
431 | if ($pathisstring) { |
432 | echo $path; |
4c8c65ec |
433 | } else { |
69faecce |
434 | readfile_chunked($path); |
f1e0649c |
435 | } |
436 | } else { // Try to put the file through filters |
f1e0649c |
437 | if ($mimetype == 'text/html') { |
a17c57b5 |
438 | $options = new object(); |
f1e0649c |
439 | $options->noclean = true; |
a17c57b5 |
440 | $options->nocache = true; // temporary workaround for MDL-5136 |
f1e0649c |
441 | $text = $pathisstring ? $path : implode('', file($path)); |
76ca1ff1 |
442 | |
3ace5ee4 |
443 | $text = file_modify_html_header($text); |
60f9e36e |
444 | $output = format_text($text, FORMAT_HTML, $options, $COURSE->id); |
4c8c65ec |
445 | if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) { |
446 | //cookieless mode - rewrite links |
447 | $output = sid_ob_rewrite($output); |
448 | } |
f1e0649c |
449 | |
4c8c65ec |
450 | @header('Content-Length: '.strlen($output)); |
451 | @header('Content-Type: text/html'); |
452 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
f1e0649c |
453 | echo $output; |
b9709b76 |
454 | // only filter text if filter all files is selected |
455 | } else if (($mimetype == 'text/plain') and ($filter == 1)) { |
60f9e36e |
456 | $options = new object(); |
f1e0649c |
457 | $options->newlines = false; |
458 | $options->noclean = true; |
459 | $text = htmlentities($pathisstring ? $path : implode('', file($path))); |
60f9e36e |
460 | $output = '<pre>'. format_text($text, FORMAT_MOODLE, $options, $COURSE->id) .'</pre>'; |
4c8c65ec |
461 | if (!empty($CFG->usesid) && empty($_COOKIE['MoodleSession'.$CFG->sessioncookie])) { |
462 | //cookieless mode - rewrite links |
463 | $output = sid_ob_rewrite($output); |
464 | } |
f1e0649c |
465 | |
4c8c65ec |
466 | @header('Content-Length: '.strlen($output)); |
810944af |
467 | @header('Content-Type: text/html; charset=utf-8'); //add encoding |
4c8c65ec |
468 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
f1e0649c |
469 | echo $output; |
470 | } else { // Just send it out raw |
4c8c65ec |
471 | @header('Content-Length: '.$filesize); |
472 | @header('Content-Type: '.$mimetype); |
473 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
f1e0649c |
474 | if ($pathisstring) { |
475 | echo $path; |
476 | }else { |
69faecce |
477 | readfile_chunked($path); |
f1e0649c |
478 | } |
479 | } |
480 | } |
481 | die; //no more chars to output!!! |
482 | } |
483 | |
a43b5308 |
484 | function get_records_csv($file, $table) { |
599f38f9 |
485 | global $CFG, $db; |
486 | |
487 | if (!$metacolumns = $db->MetaColumns($CFG->prefix . $table)) { |
488 | return false; |
489 | } |
490 | |
a77b98eb |
491 | if(!($handle = @fopen($file, 'r'))) { |
599f38f9 |
492 | error('get_records_csv failed to open '.$file); |
493 | } |
494 | |
495 | $fieldnames = fgetcsv($handle, 4096); |
496 | if(empty($fieldnames)) { |
497 | fclose($handle); |
498 | return false; |
499 | } |
500 | |
501 | $columns = array(); |
502 | |
503 | foreach($metacolumns as $metacolumn) { |
504 | $ord = array_search($metacolumn->name, $fieldnames); |
505 | if(is_int($ord)) { |
506 | $columns[$metacolumn->name] = $ord; |
507 | } |
508 | } |
509 | |
510 | $rows = array(); |
511 | |
512 | while (($data = fgetcsv($handle, 4096)) !== false) { |
513 | $item = new stdClass; |
514 | foreach($columns as $name => $ord) { |
515 | $item->$name = $data[$ord]; |
516 | } |
517 | $rows[] = $item; |
518 | } |
519 | |
520 | fclose($handle); |
521 | return $rows; |
522 | } |
523 | |
a77b98eb |
524 | function put_records_csv($file, $records, $table = NULL) { |
525 | global $CFG, $db; |
526 | |
a1e93da2 |
527 | if (empty($records)) { |
a77b98eb |
528 | return true; |
529 | } |
530 | |
531 | $metacolumns = NULL; |
532 | if ($table !== NULL && !$metacolumns = $db->MetaColumns($CFG->prefix . $table)) { |
533 | return false; |
534 | } |
535 | |
a1e93da2 |
536 | echo "x"; |
537 | |
a77b98eb |
538 | if(!($fp = @fopen($CFG->dataroot.'/temp/'.$file, 'w'))) { |
539 | error('put_records_csv failed to open '.$file); |
540 | } |
541 | |
a43b5308 |
542 | $proto = reset($records); |
543 | if(is_object($proto)) { |
544 | $fields_records = array_keys(get_object_vars($proto)); |
545 | } |
546 | else if(is_array($proto)) { |
547 | $fields_records = array_keys($proto); |
548 | } |
549 | else { |
550 | return false; |
551 | } |
a1e93da2 |
552 | echo "x"; |
a77b98eb |
553 | |
554 | if(!empty($metacolumns)) { |
555 | $fields_table = array_map(create_function('$a', 'return $a->name;'), $metacolumns); |
556 | $fields = array_intersect($fields_records, $fields_table); |
557 | } |
558 | else { |
559 | $fields = $fields_records; |
560 | } |
561 | |
562 | fwrite($fp, implode(',', $fields)); |
563 | fwrite($fp, "\r\n"); |
564 | |
565 | foreach($records as $record) { |
a43b5308 |
566 | $array = (array)$record; |
a77b98eb |
567 | $values = array(); |
568 | foreach($fields as $field) { |
a43b5308 |
569 | if(strpos($array[$field], ',')) { |
570 | $values[] = '"'.str_replace('"', '\"', $array[$field]).'"'; |
a77b98eb |
571 | } |
572 | else { |
a43b5308 |
573 | $values[] = $array[$field]; |
a77b98eb |
574 | } |
575 | } |
576 | fwrite($fp, implode(',', $values)."\r\n"); |
577 | } |
578 | |
579 | fclose($fp); |
580 | return true; |
581 | } |
582 | |
f401cc97 |
583 | |
34763a79 |
584 | /** |
76ca1ff1 |
585 | * Recursively delete the file or folder with path $location. That is, |
34763a79 |
586 | * if it is a file delete it. If it is a folder, delete all its content |
76ca1ff1 |
587 | * then delete it. If $location does not exist to start, that is not |
588 | * considered an error. |
589 | * |
34763a79 |
590 | * @param $location the path to remove. |
591 | */ |
4c8c65ec |
592 | function fulldelete($location) { |
f401cc97 |
593 | if (is_dir($location)) { |
594 | $currdir = opendir($location); |
595 | while (false !== ($file = readdir($currdir))) { |
596 | if ($file <> ".." && $file <> ".") { |
597 | $fullfile = $location."/".$file; |
4c8c65ec |
598 | if (is_dir($fullfile)) { |
f401cc97 |
599 | if (!fulldelete($fullfile)) { |
600 | return false; |
601 | } |
602 | } else { |
603 | if (!unlink($fullfile)) { |
604 | return false; |
605 | } |
4c8c65ec |
606 | } |
f401cc97 |
607 | } |
4c8c65ec |
608 | } |
f401cc97 |
609 | closedir($currdir); |
610 | if (! rmdir($location)) { |
611 | return false; |
612 | } |
613 | |
34763a79 |
614 | } else if (file_exists($location)) { |
f401cc97 |
615 | if (!unlink($location)) { |
616 | return false; |
617 | } |
618 | } |
619 | return true; |
620 | } |
621 | |
4c8c65ec |
622 | /** |
623 | * Improves memory consumptions and works around buggy readfile() in PHP 5.0.4 (2MB readfile limit). |
624 | */ |
625 | function readfile_chunked($filename, $retbytes=true) { |
626 | $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB! |
69faecce |
627 | $buffer = ''; |
76ca1ff1 |
628 | $cnt =0; |
69faecce |
629 | $handle = fopen($filename, 'rb'); |
630 | if ($handle === false) { |
631 | return false; |
632 | } |
20371063 |
633 | |
69faecce |
634 | while (!feof($handle)) { |
68913aec |
635 | @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk |
69faecce |
636 | $buffer = fread($handle, $chunksize); |
637 | echo $buffer; |
20371063 |
638 | flush(); |
69faecce |
639 | if ($retbytes) { |
4c8c65ec |
640 | $cnt += strlen($buffer); |
641 | } |
69faecce |
642 | } |
643 | $status = fclose($handle); |
644 | if ($retbytes && $status) { |
645 | return $cnt; // return num. bytes delivered like readfile() does. |
646 | } |
647 | return $status; |
648 | } |
649 | |
4c8c65ec |
650 | /** |
651 | * Send requested byterange of file. |
652 | */ |
653 | function byteserving_send_file($filename, $mimetype, $ranges) { |
654 | $chunksize = 1*(1024*1024); // 1MB chunks - must be less than 2MB! |
655 | $handle = fopen($filename, 'rb'); |
656 | if ($handle === false) { |
657 | die; |
658 | } |
659 | if (count($ranges) == 1) { //only one range requested |
660 | $length = $ranges[0][2] - $ranges[0][1] + 1; |
661 | @header('HTTP/1.1 206 Partial content'); |
662 | @header('Content-Length: '.$length); |
663 | @header('Content-Range: bytes '.$ranges[0][1].'-'.$ranges[0][2].'/'.filesize($filename)); |
664 | @header('Content-Type: '.$mimetype); |
665 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
666 | $buffer = ''; |
667 | fseek($handle, $ranges[0][1]); |
668 | while (!feof($handle) && $length > 0) { |
68913aec |
669 | @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk |
4c8c65ec |
670 | $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length)); |
671 | echo $buffer; |
672 | flush(); |
673 | $length -= strlen($buffer); |
674 | } |
675 | fclose($handle); |
676 | die; |
677 | } else { // multiple ranges requested - not tested much |
678 | $totallength = 0; |
679 | foreach($ranges as $range) { |
aba588a7 |
680 | $totallength += strlen($range[0]) + $range[2] - $range[1] + 1; |
4c8c65ec |
681 | } |
aba588a7 |
682 | $totallength += strlen("\r\n--".BYTESERVING_BOUNDARY."--\r\n"); |
4c8c65ec |
683 | @header('HTTP/1.1 206 Partial content'); |
684 | @header('Content-Length: '.$totallength); |
685 | @header('Content-Type: multipart/byteranges; boundary='.BYTESERVING_BOUNDARY); |
686 | //TODO: check if "multipart/x-byteranges" is more compatible with current readers/browsers/servers |
687 | while (@ob_end_flush()); //flush the buffers - save memory and disable sid rewrite |
688 | foreach($ranges as $range) { |
689 | $length = $range[2] - $range[1] + 1; |
690 | echo $range[0]; |
691 | $buffer = ''; |
692 | fseek($handle, $range[1]); |
693 | while (!feof($handle) && $length > 0) { |
68913aec |
694 | @set_time_limit(60*60); //reset time limit to 60 min - should be enough for 1 MB chunk |
4c8c65ec |
695 | $buffer = fread($handle, ($chunksize < $length ? $chunksize : $length)); |
696 | echo $buffer; |
697 | flush(); |
698 | $length -= strlen($buffer); |
699 | } |
700 | } |
701 | echo "\r\n--".BYTESERVING_BOUNDARY."--\r\n"; |
702 | fclose($handle); |
703 | die; |
704 | } |
705 | } |
f401cc97 |
706 | |
3ace5ee4 |
707 | /** |
708 | * add includes (js and css) into uploaded files |
709 | * before returning them, useful for themes and utf.js includes |
710 | * @param string text - text to search and replace |
711 | * @return string - text with added head includes |
712 | */ |
713 | function file_modify_html_header($text) { |
714 | // first look for <head> tag |
715 | global $CFG; |
76ca1ff1 |
716 | |
3ace5ee4 |
717 | $stylesheetshtml = ''; |
718 | foreach ($CFG->stylesheets as $stylesheet) { |
719 | $stylesheetshtml .= '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'" />'."\n"; |
76ca1ff1 |
720 | } |
721 | |
3ace5ee4 |
722 | $filters = explode(",", $CFG->textfilters); |
723 | if (in_array('filter/mediaplugin', $filters)) { |
76ca1ff1 |
724 | // this script is needed by most media filter plugins. |
725 | $ufo = "\n".'<script type="text/javascript" src="'.$CFG->wwwroot.'/lib/ufo.js"></script>'."\n"; |
3ace5ee4 |
726 | } else { |
76ca1ff1 |
727 | $ufo = ''; |
3ace5ee4 |
728 | } |
76ca1ff1 |
729 | |
3ace5ee4 |
730 | preg_match('/\<head\>|\<HEAD\>/', $text, $matches); |
731 | if ($matches) { |
732 | $replacement = '<head>'.$ufo.$stylesheetshtml; |
733 | $text = preg_replace('/\<head\>|\<HEAD\>/', $replacement, $text, 1); |
76ca1ff1 |
734 | return $text; |
3ace5ee4 |
735 | } |
76ca1ff1 |
736 | |
3ace5ee4 |
737 | // if not, look for <html> tag, and stick <head> right after |
738 | preg_match('/\<html\>|\<HTML\>/', $text, $matches); |
739 | if ($matches) { |
740 | // replace <html> tag with <html><head>includes</head> |
13534ef7 |
741 | $replacement = '<html>'."\n".'<head>'.$ufo.$stylesheetshtml.'</head>'; |
3ace5ee4 |
742 | $text = preg_replace('/\<html\>|\<HTML\>/', $replacement, $text, 1); |
76ca1ff1 |
743 | return $text; |
3ace5ee4 |
744 | } |
76ca1ff1 |
745 | |
3ace5ee4 |
746 | // if not, look for <body> tag, and stick <head> before body |
747 | preg_match('/\<body\>|\<BODY\>/', $text, $matches); |
748 | if ($matches) { |
13534ef7 |
749 | $replacement = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".'<body>'; |
3ace5ee4 |
750 | $text = preg_replace('/\<body\>|\<BODY\>/', $replacement, $text, 1); |
76ca1ff1 |
751 | return $text; |
752 | } |
753 | |
3ace5ee4 |
754 | // if not, just stick a <head> tag at the beginning |
755 | $text = '<head>'.$ufo.$stylesheetshtml.'</head>'."\n".$text; |
756 | return $text; |
757 | } |
758 | |
a77b98eb |
759 | ?> |