2 // Based upon "Privacy Image Cache" by Tobias Hößl <https://github.com/CatoTH/>
4 define('PROXY_DEFAULT_TIME', 86400); // 1 Day
6 define('PROXY_SIZE_MICRO', 'micro');
7 define('PROXY_SIZE_THUMB', 'thumb');
8 define('PROXY_SIZE_SMALL', 'small');
9 define('PROXY_SIZE_MEDIUM', 'medium');
10 define('PROXY_SIZE_LARGE', 'large');
12 require_once 'include/security.php';
13 require_once 'include/Photo.php';
15 function proxy_init(App $a) {
16 // Pictures are stored in one of the following ways:
17 // 1. If a folder "proxy" exists and is writeable, then use this for caching
18 // 2. If a cache path is defined, use this
19 // 3. If everything else failed, cache into the database
21 // Question: Do we really need these three methods?
23 if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
24 header('HTTP/1.1 304 Not Modified');
25 header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
26 header('Etag: ' . $_SERVER['HTTP_IF_NONE_MATCH']);
27 header('Expires: ' . gmdate('D, d M Y H:i:s', time() + (31536000)) . ' GMT');
28 header('Cache-Control: max-age=31536000');
30 if (function_exists('header_remove')) {
31 header_remove('Last-Modified');
32 header_remove('Expires');
33 header_remove('Cache-Control');
38 if (function_exists('header_remove')) {
39 header_remove('Pragma');
40 header_remove('pragma');
46 $basepath = $a->get_basepath();
48 // If the cache path isn't there, try to create it
49 if (!is_dir($basepath . '/proxy') AND is_writable($basepath)) {
50 mkdir($basepath . '/proxy');
53 // Checking if caching into a folder in the webroot is activated and working
54 $direct_cache = (is_dir($basepath . '/proxy') AND is_writable($basepath . '/proxy'));
56 // Look for filename in the arguments
57 if ((isset($a->argv[1]) OR isset($a->argv[2]) OR isset($a->argv[3])) AND !isset($_REQUEST['url'])) {
58 if (isset($a->argv[3])) {
60 } elseif (isset($a->argv[2])) {
66 if (isset($a->argv[3]) AND ($a->argv[3] == 'thumb')) {
70 // thumb, small, medium and large.
71 if (substr($url, -6) == ':micro') {
74 $url = substr($url, 0, -6);
75 } elseif (substr($url, -6) == ':thumb') {
78 $url = substr($url, 0, -6);
79 } elseif (substr($url, -6) == ':small') {
81 $url = substr($url, 0, -6);
83 } elseif (substr($url, -7) == ':medium') {
85 $url = substr($url, 0, -7);
86 $sizetype = ':medium';
87 } elseif (substr($url, -6) == ':large') {
89 $url = substr($url, 0, -6);
93 $pos = strrpos($url, '=.');
95 $url = substr($url, 0, $pos + 1);
98 $url = str_replace(array('.jpg', '.jpeg', '.gif', '.png'), array('','','',''), $url);
100 $url = base64_decode(strtr($url, '-_', '+/'), true);
103 $_REQUEST['url'] = $url;
106 $direct_cache = false;
109 if (!$direct_cache) {
110 $urlhash = 'pic:' . sha1($_REQUEST['url']);
112 $cachefile = get_cachefile(hash('md5', $_REQUEST['url']));
113 if ($cachefile != '' AND file_exists($cachefile)) {
114 $img_str = file_get_contents($cachefile);
115 $mime = image_type_to_mime_type(exif_imagetype($cachefile));
117 header('Content-type: ' . $mime);
118 header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
119 header('Etag: "' . md5($img_str) . '"');
120 header('Expires: ' . gmdate('D, d M Y H:i:s', time() + (31536000)) . ' GMT');
121 header('Cache-Control: max-age=31536000');
123 // reduce quality - if it isn't a GIF
124 if ($mime != 'image/gif') {
125 $img = new Photo($img_str, $mime);
126 if ($img->is_valid()) {
127 $img_str = $img->imageString();
140 if (!$direct_cache AND ($cachefile == '')) {
141 $r = qu("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash);
142 if (dbm::is_result($r)) {
143 <<<<<<< origin/rewrites/app_get_baseurl_static
144 $img_str = $r[0]['data'];
145 $mime = $r[0]["desc"];
146 if ($mime == "") $mime = "image/jpeg";
148 $img_str = $r[0]['data'];
149 $mime = $r[0]['desc'];
151 $mime = 'image/jpeg';
159 if (!dbm::is_result($r)) {
160 // It shouldn't happen but it does - spaces in URL
161 $_REQUEST['url'] = str_replace(' ', '+', $_REQUEST['url']);
163 $img_str = fetch_url($_REQUEST['url'], true, $redirects, 10);
165 $tempfile = tempnam(get_temppath(), 'cache');
166 file_put_contents($tempfile, $img_str);
167 $mime = image_type_to_mime_type(exif_imagetype($tempfile));
170 // If there is an error then return a blank image
171 if ((substr($a->get_curl_code(), 0, 1) == '4') OR (!$img_str)) {
172 $img_str = file_get_contents('images/blank.png');
174 $cachefile = ''; // Clear the cachefile so that the dummy isn't stored
176 $img = new Photo($img_str, 'image/png');
177 if ($img->is_valid()) {
178 $img->scaleImage(10);
179 $img_str = $img->imageString();
181 } elseif ($mime != 'image/jpeg' AND !$direct_cache AND $cachefile == '') {
182 $image = @imagecreatefromstring($img_str);
184 if ($image === FALSE) {
188 q("INSERT INTO `photo`
189 ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
190 VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
191 0, 0, get_guid(), dbesc($urlhash),
192 dbesc(datetime_convert()),
193 dbesc(datetime_convert()),
194 dbesc(basename(dbesc($_REQUEST['url']))),
196 intval(imagesy($image)),
197 intval(imagesx($image)),
202 dbesc(''), dbesc(''), dbesc(''), dbesc('')
206 $img = new Photo($img_str, $mime);
207 if ($img->is_valid() AND !$direct_cache AND ($cachefile == '')) {
208 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
213 $img_str_orig = $img_str;
215 // reduce quality - if it isn't a GIF
216 if ($mime != 'image/gif') {
217 $img = new Photo($img_str, $mime);
218 if ($img->is_valid()) {
219 $img->scaleImage($size);
220 $img_str = $img->imageString();
224 // If there is a real existing directory then put the cache file there
225 // advantage: real file access is really fast
226 // Otherwise write in cachefile
227 if ($valid AND $direct_cache) {
228 file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true), $img_str_orig);
229 if ($sizetype != '') {
230 file_put_contents($basepath . '/proxy/' . proxy_url($_REQUEST['url'], true) . $sizetype, $img_str);
232 } elseif ($cachefile != '') {
233 file_put_contents($cachefile, $img_str_orig);
236 header('Content-type: ' . $mime);
238 // Only output the cache headers when the file is valid
240 header('Last-Modified: ' . gmdate('D, d M Y H:i:s', time()) . ' GMT');
241 header('Etag: "' . md5($img_str) . '"');
242 header('Expires: ' . gmdate('D, d M Y H:i:s', time() + (31536000)) . ' GMT');
243 header('Cache-Control: max-age=31536000');
252 * @brief Transform a remote URL into a local one
254 * This function only performs the URL replacement on http URL and if the
255 * provided URL isn't local, "the isn't deactivated" (sic) and if the config
256 * system.proxy_disabled is set to false.
258 * @param string $url The URL to proxyfy
259 * @param bool $writemode Returns a local path the remote URL should be saved to
260 * @param string $size One of the PROXY_SIZE_* constants
262 * @return string The proxyfied URL or relative path
264 function proxy_url($url, $writemode = false, $size = '') {
267 if (substr($url, 0, strlen('http')) !== 'http') {
271 // Only continue if it isn't a local image and the isn't deactivated
272 if (proxy_is_local_image($url)) {
273 $url = str_replace(normalise_link(App::get_baseurl()) . '/', App::get_baseurl() . '/', $url);
277 if (get_config('system', 'proxy_disabled')) {
281 // Image URL may have encoded ampersands for display which aren't desirable for proxy
282 $url = html_entity_decode($url, ENT_NOQUOTES, 'utf-8');
284 // Creating a sub directory to reduce the amount of files in the cache directory
285 $basepath = $a->get_basepath() . '/proxy';
287 $shortpath = hash('md5', $url);
288 $longpath = substr($shortpath, 0, 2);
290 if (is_dir($basepath) AND $writemode AND !is_dir($basepath . '/' . $longpath)) {
291 mkdir($basepath . '/' . $longpath);
292 chmod($basepath . '/' . $longpath, 0777);
295 $longpath .= '/' . strtr(base64_encode($url), '+/', '-_');
297 // Extract the URL extension
298 $extension = pathinfo(parse_url($url, PHP_URL_PATH), PATHINFO_EXTENSION);
300 $extensions = array('jpg', 'jpeg', 'gif', 'png');
301 if (in_array($extension, $extensions)) {
302 $shortpath .= '.' . $extension;
303 $longpath .= '.' . $extension;
306 $proxypath = App::get_baseurl() . '/proxy/' . $longpath;
312 // Too long files aren't supported by Apache
313 // Writemode in combination with long files shouldn't be possible
314 if ((strlen($proxypath) > 250) AND $writemode) {
316 } elseif (strlen($proxypath) > 250) {
317 return App::get_baseurl() . '/proxy/' . $shortpath . '?url=' . urlencode($url);
318 } elseif ($writemode) {
321 return $proxypath . $size;
329 function proxy_is_local_image($url) {
330 if ($url[0] == '/') {
334 if (strtolower(substr($url, 0, 5)) == 'data:') {
338 // links normalised - bug #431
339 $baseurl = normalise_link(App::get_baseurl());
340 $url = normalise_link($url);
341 return (substr($url, 0, strlen($baseurl)) == $baseurl);
345 * @brief Return the array of query string parameters from a URL
348 * @return array Associative array of query string parameters
350 function proxy_parse_query($url) {
351 $query = parse_url($url, PHP_URL_QUERY);
352 $query = html_entity_decode($query);
353 $query_list = explode('&', $query);
356 foreach ($query_list as $key_value) {
357 $key_value_list = explode('=', $key_value);
358 $arr[$key_value_list[0]] = $key_value_list[1];
361 unset($url, $query_list, $url);
365 function proxy_img_cb($matches) {
366 // if the picture seems to be from another picture cache then take the original source
367 $queryvar = proxy_parse_query($matches[2]);
368 if (($queryvar['url'] != '') AND (substr($queryvar['url'], 0, 4) == 'http')) {
369 $matches[2] = urldecode($queryvar['url']);
372 // following line changed per bug #431
373 if (proxy_is_local_image($matches[2])) {
374 return $matches[1] . $matches[2] . $matches[3];
377 return $matches[1] . proxy_url(htmlspecialchars_decode($matches[2])) . $matches[3];
380 function proxy_parse_html($html) {
381 $html = str_replace(normalise_link(App::get_baseurl()) . '/', App::get_baseurl() . '/', $html);
383 return preg_replace_callback('/(<img [^>]*src *= *["\'])([^"\']+)(["\'][^>]*>)/siU', 'proxy_img_cb', $html);