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 if(! function_exists('proxy_init')) {
16 function proxy_init() {
19 // Pictures are stored in one of the following ways:
20 // 1. If a folder "proxy" exists and is writeable, then use this for caching
21 // 2. If a cache path is defined, use this
22 // 3. If everything else failed, cache into the database
24 // Question: Do we really need these three methods?
26 if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
27 header('HTTP/1.1 304 Not Modified');
28 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
29 header('Etag: '.$_SERVER['HTTP_IF_NONE_MATCH']);
30 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
31 header("Cache-Control: max-age=31536000");
32 if(function_exists('header_remove')) {
33 header_remove('Last-Modified');
34 header_remove('Expires');
35 header_remove('Cache-Control');
40 if(function_exists('header_remove')) {
41 header_remove('Pragma');
42 header_remove('pragma');
48 $basepath = $a->get_basepath();
50 // If the cache path isn't there, try to create it
51 if (!is_dir($basepath."/proxy"))
52 if (is_writable($basepath))
53 mkdir($basepath."/proxy");
55 // Checking if caching into a folder in the webroot is activated and working
56 $direct_cache = (is_dir($basepath."/proxy") AND is_writable($basepath."/proxy"));
58 // Look for filename in the arguments
59 if ((isset($a->argv[1]) OR isset($a->argv[2]) OR isset($a->argv[3])) AND !isset($_REQUEST["url"])) {
60 if (isset($a->argv[3]))
62 elseif (isset($a->argv[2]))
67 if (isset($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);
97 $url = str_replace(array(".jpg", ".jpeg", ".gif", ".png"), array("","","",""), $url);
99 $url = base64_decode(strtr($url, '-_', '+/'), true);
102 $_REQUEST['url'] = $url;
104 $direct_cache = false;
106 if (!$direct_cache) {
107 $urlhash = 'pic:' . sha1($_REQUEST['url']);
109 $cachefile = get_cachefile(hash("md5", $_REQUEST['url']));
110 if ($cachefile != '') {
111 if (file_exists($cachefile)) {
112 $img_str = file_get_contents($cachefile);
113 $mime = image_type_to_mime_type(exif_imagetype($cachefile));
115 header("Content-type: $mime");
116 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
117 header('Etag: "'.md5($img_str).'"');
118 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
119 header("Cache-Control: max-age=31536000");
121 // reduce quality - if it isn't a GIF
122 if ($mime != "image/gif") {
123 $img = new Photo($img_str, $mime);
124 if($img->is_valid()) {
125 $img_str = $img->imageString();
138 if (!$direct_cache AND ($cachefile == "")) {
139 $r = q("SELECT * FROM `photo` WHERE `resource-id` = '%s' LIMIT 1", $urlhash);
141 $img_str = $r[0]['data'];
142 $mime = $r[0]["desc"];
143 if ($mime == "") $mime = "image/jpeg";
149 // It shouldn't happen but it does - spaces in URL
150 $_REQUEST['url'] = str_replace(" ", "+", $_REQUEST['url']);
152 $img_str = fetch_url($_REQUEST['url'],true, $redirects, 10);
154 $tempfile = tempnam(get_temppath(), "cache");
155 file_put_contents($tempfile, $img_str);
156 $mime = image_type_to_mime_type(exif_imagetype($tempfile));
159 // If there is an error then return a blank image
160 if ((substr($a->get_curl_code(), 0, 1) == "4") or (!$img_str)) {
161 $img_str = file_get_contents("images/blank.png");
163 $cachefile = ""; // Clear the cachefile so that the dummy isn't stored
165 $img = new Photo($img_str, "image/png");
166 if($img->is_valid()) {
167 $img->scaleImage(10);
168 $img_str = $img->imageString();
170 } else if (($mime != "image/jpeg") AND !$direct_cache AND ($cachefile == "")) {
171 $image = @imagecreatefromstring($img_str);
173 if($image === FALSE) die();
175 q("INSERT INTO `photo`
176 ( `uid`, `contact-id`, `guid`, `resource-id`, `created`, `edited`, `filename`, `album`, `height`, `width`, `desc`, `data`, `scale`, `profile`, `allow_cid`, `allow_gid`, `deny_cid`, `deny_gid` )
177 VALUES ( %d, %d, '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, '%s', '%s', %d, %d, '%s', '%s', '%s', '%s' )",
178 0, 0, get_guid(), dbesc($urlhash),
179 dbesc(datetime_convert()),
180 dbesc(datetime_convert()),
181 dbesc(basename(dbesc($_REQUEST["url"]))),
183 intval(imagesy($image)),
184 intval(imagesx($image)),
189 dbesc(''), dbesc(''), dbesc(''), dbesc('')
193 $img = new Photo($img_str, $mime);
194 if($img->is_valid()) {
195 if (!$direct_cache AND ($cachefile == ""))
196 $img->store(0, 0, $urlhash, $_REQUEST['url'], '', 100);
201 $img_str_orig = $img_str;
203 // reduce quality - if it isn't a GIF
204 if ($mime != "image/gif") {
205 $img = new Photo($img_str, $mime);
206 if($img->is_valid()) {
207 $img->scaleImage($size);
208 $img_str = $img->imageString();
212 // If there is a real existing directory then put the cache file there
213 // advantage: real file access is really fast
214 // Otherwise write in cachefile
215 if ($valid AND $direct_cache) {
216 file_put_contents($basepath."/proxy/".proxy_url($_REQUEST['url'], true), $img_str_orig);
218 file_put_contents($basepath."/proxy/".proxy_url($_REQUEST['url'], true).$sizetype, $img_str);
219 } elseif ($cachefile != '')
220 file_put_contents($cachefile, $img_str_orig);
222 header("Content-type: $mime");
224 // Only output the cache headers when the file is valid
226 header("Last-Modified: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
227 header('Etag: "'.md5($img_str).'"');
228 header("Expires: " . gmdate("D, d M Y H:i:s", time() + (31536000)) . " GMT");
229 header("Cache-Control: max-age=31536000");
238 if(! function_exists('proxy_url')) {
239 function proxy_url($url, $writemode = false, $size = "") {
244 if (substr($url, 0, strlen('http')) !== 'http') {
248 // Only continue if it isn't a local image and the isn't deactivated
249 if (proxy_is_local_image($url)) {
250 $url = str_replace(normalise_link($a->get_baseurl())."/", $a->get_baseurl()."/", $url);
254 if (get_config("system", "proxy_disabled"))
257 // Creating a sub directory to reduce the amount of files in the cache directory
258 $basepath = $a->get_basepath()."/proxy";
260 $path = substr(hash("md5", $url), 0, 2);
262 if (is_dir($basepath) and $writemode)
263 if (!is_dir($basepath."/".$path)) {
264 mkdir($basepath."/".$path);
265 chmod($basepath."/".$path, 0777);
268 $path .= "/".strtr(base64_encode($url), '+/', '-_');
270 // Checking for valid extensions. Only add them if they are safe
271 $pos = strrpos($url, ".");
273 $extension = strtolower(substr($url, $pos+1));
274 $pos = strpos($extension, "?");
276 $extension = substr($extension, 0, $pos);
279 $extensions = array("jpg", "jpeg", "gif", "png");
281 if (in_array($extension, $extensions))
282 $path .= ".".$extension;
284 $proxypath = $a->get_baseurl()."/proxy/".$path;
289 // Too long files aren't supported by Apache
290 // Writemode in combination with long files shouldn't be possible
291 if ((strlen($proxypath) > 250) AND $writemode)
292 return (hash("md5", $url));
293 elseif (strlen($proxypath) > 250)
294 return ($a->get_baseurl()."/proxy/".hash("md5", $url)."?url=".urlencode($url));
298 return ($proxypath.$size);
306 if(! function_exists('proxy_is_local_image')) {
307 function proxy_is_local_image($url) {
308 if ($url[0] == '/') return true;
310 if (strtolower(substr($url, 0, 5)) == "data:") return true;
312 // links normalised - bug #431
313 $baseurl = normalise_link(get_app()->get_baseurl());
314 $url = normalise_link($url);
315 return (substr($url, 0, strlen($baseurl)) == $baseurl);
319 if(! function_exists('proxy_parse_query')) {
320 function proxy_parse_query($var) {
322 * Use this function to parse out the query array element from
323 * the output of parse_url().
325 $var = parse_url($var, PHP_URL_QUERY);
326 $var = html_entity_decode($var);
327 $var = explode('&', $var);
330 foreach($var as $val) {
331 $x = explode('=', $val);
335 unset($val, $x, $var);
340 if(! function_exists('proxy_img_cb')) {
341 function proxy_img_cb($matches) {
343 // if the picture seems to be from another picture cache then take the original source
344 $queryvar = proxy_parse_query($matches[2]);
345 if (($queryvar['url'] != "") AND (substr($queryvar['url'], 0, 4) == "http"))
346 $matches[2] = urldecode($queryvar['url']);
348 // following line changed per bug #431
349 if (proxy_is_local_image($matches[2]))
350 return $matches[1] . $matches[2] . $matches[3];
352 return $matches[1].proxy_url(htmlspecialchars_decode($matches[2])).$matches[3];
356 if(! function_exists('proxy_parse_html')) {
357 function proxy_parse_html($html) {
359 $html = str_replace(normalise_link($a->get_baseurl())."/", $a->get_baseurl()."/", $html);
361 return preg_replace_callback("/(<img [^>]*src *= *[\"'])([^\"']+)([\"'][^>]*>)/siU", "proxy_img_cb", $html);