diff options
Diffstat (limited to 'utils/thumb.php')
| -rw-r--r-- | utils/thumb.php | 1244 |
1 files changed, 1244 insertions, 0 deletions
diff --git a/utils/thumb.php b/utils/thumb.php new file mode 100644 index 0000000..8eb6bb8 --- /dev/null +++ b/utils/thumb.php @@ -0,0 +1,1244 @@ +<?php
+/**
+ * TimThumb by Ben Gillbanks and Mark Maunder
+ * Based on work done by Tim McDaniels and Darren Hoyt
+ * http://code.google.com/p/timthumb/
+ *
+ * GNU General Public License, version 2
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ *
+ * Examples and documentation available on the project homepage
+ * http://www.binarymoon.co.uk/projects/timthumb/
+ *
+ * $Rev$
+ */
+
+/*
+ * --- TimThumb CONFIGURATION ---
+ * To edit the configs it is best to create a file called timthumb-config.php
+ * and define variables you want to customize in there. It will automatically be
+ * loaded by timthumb. This will save you having to re-edit these variables
+ * everytime you download a new version
+*/
+define ('VERSION', '2.8.10'); // Version of this script
+//Load a config file if it exists. Otherwise, use the values below
+if( file_exists(dirname(__FILE__) . '/timthumb-config.php')) require_once('timthumb-config.php');
+if(! defined('DEBUG_ON') ) define ('DEBUG_ON', false); // Enable debug logging to web server error log (STDERR)
+if(! defined('DEBUG_LEVEL') ) define ('DEBUG_LEVEL', 1); // Debug level 1 is less noisy and 3 is the most noisy
+if(! defined('MEMORY_LIMIT') ) define ('MEMORY_LIMIT', '30M'); // Set PHP memory limit
+if(! defined('BLOCK_EXTERNAL_LEECHERS') ) define ('BLOCK_EXTERNAL_LEECHERS', false); // If the image or webshot is being loaded on an external site, display a red "No Hotlinking" gif.
+
+//Image fetching and caching
+if(! defined('ALLOW_EXTERNAL') ) define ('ALLOW_EXTERNAL', false); // Allow image fetching from external websites. Will check against ALLOWED_SITES if ALLOW_ALL_EXTERNAL_SITES is false
+if(! defined('ALLOW_ALL_EXTERNAL_SITES') ) define ('ALLOW_ALL_EXTERNAL_SITES', false); // Less secure.
+if(! defined('FILE_CACHE_ENABLED') ) define ('FILE_CACHE_ENABLED', TRUE); // Should we store resized/modified images on disk to speed things up?
+if(! defined('FILE_CACHE_TIME_BETWEEN_CLEANS')) define ('FILE_CACHE_TIME_BETWEEN_CLEANS', 86400); // How often the cache is cleaned
+
+if(! defined('FILE_CACHE_MAX_FILE_AGE') ) define ('FILE_CACHE_MAX_FILE_AGE', 86400); // How old does a file have to be to be deleted from the cache
+if(! defined('FILE_CACHE_SUFFIX') ) define ('FILE_CACHE_SUFFIX', '.timthumb.txt'); // What to put at the end of all files in the cache directory so we can identify them
+if(! defined('FILE_CACHE_PREFIX') ) define ('FILE_CACHE_PREFIX', 'timthumb'); // What to put at the beg of all files in the cache directory so we can identify them
+if(! defined('FILE_CACHE_DIRECTORY') ) define ('FILE_CACHE_DIRECTORY', './cache'); // Directory where images are cached. Left blank it will use the system temporary directory (which is better for security)
+if(! defined('MAX_FILE_SIZE') ) define ('MAX_FILE_SIZE', 10485760); // 10 Megs is 10485760. This is the max internal or external file size that we'll process.
+if(! defined('CURL_TIMEOUT') ) define ('CURL_TIMEOUT', 20); // Timeout duration for Curl. This only applies if you have Curl installed and aren't using PHP's default URL fetching mechanism.
+if(! defined('WAIT_BETWEEN_FETCH_ERRORS') ) define ('WAIT_BETWEEN_FETCH_ERRORS', 3600); //Time to wait between errors fetching remote file
+
+//Browser caching
+if(! defined('BROWSER_CACHE_MAX_AGE') ) define ('BROWSER_CACHE_MAX_AGE', 864000); // Time to cache in the browser
+if(! defined('BROWSER_CACHE_DISABLE') ) define ('BROWSER_CACHE_DISABLE', false); // Use for testing if you want to disable all browser caching
+
+//Image size and defaults
+if(! defined('MAX_WIDTH') ) define ('MAX_WIDTH', 1500); // Maximum image width
+if(! defined('MAX_HEIGHT') ) define ('MAX_HEIGHT', 1500); // Maximum image height
+if(! defined('NOT_FOUND_IMAGE') ) define ('NOT_FOUND_IMAGE', ''); // Image to serve if any 404 occurs
+if(! defined('ERROR_IMAGE') ) define ('ERROR_IMAGE', ''); // Image to serve if an error occurs instead of showing error message
+if(! defined('PNG_IS_TRANSPARENT') ) define ('PNG_IS_TRANSPARENT', FALSE); //42 Define if a png image should have a transparent background color. Use False value if you want to display a custom coloured canvas_colour
+if(! defined('DEFAULT_Q') ) define ('DEFAULT_Q', 90); // Default image quality. Allows overrid in timthumb-config.php
+if(! defined('DEFAULT_ZC') ) define ('DEFAULT_ZC', 1); // Default zoom/crop setting. Allows overrid in timthumb-config.php
+if(! defined('DEFAULT_F') ) define ('DEFAULT_F', ''); // Default image filters. Allows overrid in timthumb-config.php
+if(! defined('DEFAULT_S') ) define ('DEFAULT_S', 0); // Default sharpen value. Allows overrid in timthumb-config.php
+if(! defined('DEFAULT_CC') ) define ('DEFAULT_CC', 'ffffff'); // Default canvas colour. Allows overrid in timthumb-config.php
+
+
+//Image compression is enabled if either of these point to valid paths
+
+//These are now disabled by default because the file sizes of PNGs (and GIFs) are much smaller than we used to generate.
+//They only work for PNGs. GIFs and JPEGs are not affected.
+if(! defined('OPTIPNG_ENABLED') ) define ('OPTIPNG_ENABLED', false);
+if(! defined('OPTIPNG_PATH') ) define ('OPTIPNG_PATH', '/usr/bin/optipng'); //This will run first because it gives better compression than pngcrush.
+if(! defined('PNGCRUSH_ENABLED') ) define ('PNGCRUSH_ENABLED', false);
+if(! defined('PNGCRUSH_PATH') ) define ('PNGCRUSH_PATH', '/usr/bin/pngcrush'); //This will only run if OPTIPNG_PATH is not set or is not valid
+
+/*
+ -------====Website Screenshots configuration - BETA====-------
+
+ If you just want image thumbnails and don't want website screenshots, you can safely leave this as is.
+
+ If you would like to get website screenshots set up, you will need root access to your own server.
+
+ Enable ALLOW_ALL_EXTERNAL_SITES so you can fetch any external web page. This is more secure now that we're using a non-web folder for cache.
+ Enable BLOCK_EXTERNAL_LEECHERS so that your site doesn't generate thumbnails for the whole Internet.
+
+ Instructions to get website screenshots enabled on Ubuntu Linux:
+
+ 1. Install Xvfb with the following command: sudo apt-get install subversion libqt4-webkit libqt4-dev g++ xvfb
+ 2. Go to a directory where you can download some code
+ 3. Check-out the latest version of CutyCapt with the following command: svn co https://cutycapt.svn.sourceforge.net/svnroot/cutycapt
+ 4. Compile CutyCapt by doing: cd cutycapt/CutyCapt
+ 5. qmake
+ 6. make
+ 7. cp CutyCapt /usr/local/bin/
+ 8. Test it by running: xvfb-run --server-args="-screen 0, 1024x768x24" CutyCapt --url="http://markmaunder.com/" --out=test.png
+ 9. If you get a file called test.png with something in it, it probably worked. Now test the script by accessing it as follows:
+ 10. http://yoursite.com/path/to/timthumb.php?src=http://markmaunder.com/&webshot=1
+
+ Notes on performance:
+ The first time a webshot loads, it will take a few seconds.
+ From then on it uses the regular timthumb caching mechanism with the configurable options above
+ and loading will be very fast.
+
+ --ADVANCED USERS ONLY--
+ If you'd like a slight speedup (about 25%) and you know Linux, you can run the following command which will keep Xvfb running in the background.
+ nohup Xvfb :100 -ac -nolisten tcp -screen 0, 1024x768x24 > /dev/null 2>&1 &
+ Then set WEBSHOT_XVFB_RUNNING = true below. This will save your server having to fire off a new Xvfb server and shut it down every time a new shot is generated.
+ You will need to take responsibility for keeping Xvfb running in case it crashes. (It seems pretty stable)
+ You will also need to take responsibility for server security if you're running Xvfb as root.
+
+
+*/
+if(! defined('WEBSHOT_ENABLED') ) define ('WEBSHOT_ENABLED', false); //Beta feature. Adding webshot=1 to your query string will cause the script to return a browser screenshot rather than try to fetch an image.
+if(! defined('WEBSHOT_CUTYCAPT') ) define ('WEBSHOT_CUTYCAPT', '/usr/local/bin/CutyCapt'); //The path to CutyCapt.
+if(! defined('WEBSHOT_XVFB') ) define ('WEBSHOT_XVFB', '/usr/bin/xvfb-run'); //The path to the Xvfb server
+if(! defined('WEBSHOT_SCREEN_X') ) define ('WEBSHOT_SCREEN_X', '1024'); //1024 works ok
+if(! defined('WEBSHOT_SCREEN_Y') ) define ('WEBSHOT_SCREEN_Y', '768'); //768 works ok
+if(! defined('WEBSHOT_COLOR_DEPTH') ) define ('WEBSHOT_COLOR_DEPTH', '24'); //I haven't tested anything besides 24
+if(! defined('WEBSHOT_IMAGE_FORMAT') ) define ('WEBSHOT_IMAGE_FORMAT', 'png'); //png is about 2.5 times the size of jpg but is a LOT better quality
+if(! defined('WEBSHOT_TIMEOUT') ) define ('WEBSHOT_TIMEOUT', '20'); //Seconds to wait for a webshot
+if(! defined('WEBSHOT_USER_AGENT') ) define ('WEBSHOT_USER_AGENT', "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-GB; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18"); //I hate to do this, but a non-browser robot user agent might not show what humans see. So we pretend to be Firefox
+if(! defined('WEBSHOT_JAVASCRIPT_ON') ) define ('WEBSHOT_JAVASCRIPT_ON', true); //Setting to false might give you a slight speedup and block ads. But it could cause other issues.
+if(! defined('WEBSHOT_JAVA_ON') ) define ('WEBSHOT_JAVA_ON', false); //Have only tested this as fase
+if(! defined('WEBSHOT_PLUGINS_ON') ) define ('WEBSHOT_PLUGINS_ON', true); //Enable flash and other plugins
+if(! defined('WEBSHOT_PROXY') ) define ('WEBSHOT_PROXY', ''); //In case you're behind a proxy server.
+if(! defined('WEBSHOT_XVFB_RUNNING') ) define ('WEBSHOT_XVFB_RUNNING', false); //ADVANCED: Enable this if you've got Xvfb running in the background.
+
+
+// If ALLOW_EXTERNAL is true and ALLOW_ALL_EXTERNAL_SITES is false, then external images will only be fetched from these domains and their subdomains.
+if(! isset($ALLOWED_SITES)){
+ $ALLOWED_SITES = array (
+ 'flickr.com',
+ 'staticflickr.com',
+ 'picasa.com',
+ 'img.youtube.com',
+ 'upload.wikimedia.org',
+ 'photobucket.com',
+ 'imgur.com',
+ 'imageshack.us',
+ 'tinypic.com',
+ );
+}
+// -------------------------------------------------------------
+// -------------- STOP EDITING CONFIGURATION HERE --------------
+// -------------------------------------------------------------
+
+timthumb::start();
+
+class timthumb {
+ protected $src = "";
+ protected $is404 = false;
+ protected $docRoot = "";
+ protected $lastURLError = false;
+ protected $localImage = "";
+ protected $localImageMTime = 0;
+ protected $url = false;
+ protected $myHost = "";
+ protected $isURL = false;
+ protected $cachefile = '';
+ protected $errors = array();
+ protected $toDeletes = array();
+ protected $cacheDirectory = '';
+ protected $startTime = 0;
+ protected $lastBenchTime = 0;
+ protected $cropTop = false;
+ protected $salt = "";
+ protected $fileCacheVersion = 1; //Generally if timthumb.php is modifed (upgraded) then the salt changes and all cache files are recreated. This is a backup mechanism to force regen.
+ protected $filePrependSecurityBlock = "<?php die('Execution denied!'); //"; //Designed to have three letter mime type, space, question mark and greater than symbol appended. 6 bytes total.
+ protected static $curlDataWritten = 0;
+ protected static $curlFH = false;
+ public static function start(){
+ $tim = new timthumb();
+ $tim->handleErrors();
+ $tim->securityChecks();
+ if($tim->tryBrowserCache()){
+ exit(0);
+ }
+ $tim->handleErrors();
+ if(FILE_CACHE_ENABLED && $tim->tryServerCache()){
+ exit(0);
+ }
+ $tim->handleErrors();
+ $tim->run();
+ $tim->handleErrors();
+ exit(0);
+ }
+ public function __construct(){
+ global $ALLOWED_SITES;
+ $this->startTime = microtime(true);
+ date_default_timezone_set('UTC');
+ $this->debug(1, "Starting new request from " . $this->getIP() . " to " . $_SERVER['REQUEST_URI']);
+ $this->calcDocRoot();
+ //On windows systems I'm assuming fileinode returns an empty string or a number that doesn't change. Check this.
+ $this->salt = @filemtime(__FILE__) . '-' . @fileinode(__FILE__);
+ $this->debug(3, "Salt is: " . $this->salt);
+ if(FILE_CACHE_DIRECTORY){
+ if(! is_dir(FILE_CACHE_DIRECTORY)){
+ @mkdir(FILE_CACHE_DIRECTORY);
+ if(! is_dir(FILE_CACHE_DIRECTORY)){
+ $this->error("Could not create the file cache directory.");
+ return false;
+ }
+ }
+ $this->cacheDirectory = FILE_CACHE_DIRECTORY;
+ if (!touch($this->cacheDirectory . '/index.html')) {
+ $this->error("Could not create the index.html file - to fix this create an empty file named index.html file in the cache directory.");
+ }
+ } else {
+ $this->cacheDirectory = sys_get_temp_dir();
+ }
+ //Clean the cache before we do anything because we don't want the first visitor after FILE_CACHE_TIME_BETWEEN_CLEANS expires to get a stale image.
+ $this->cleanCache();
+
+ $this->myHost = preg_replace('/^www\./i', '', $_SERVER['HTTP_HOST']);
+ $this->src = $this->param('src');
+ $this->url = parse_url($this->src);
+ $this->src = preg_replace('/https?:\/\/(?:www\.)?' . $this->myHost . '/i', '', $this->src);
+
+ if(strlen($this->src) <= 3){
+ $this->error("No image specified");
+ return false;
+ }
+ if(BLOCK_EXTERNAL_LEECHERS && array_key_exists('HTTP_REFERER', $_SERVER) && (! preg_match('/^https?:\/\/(?:www\.)?' . $this->myHost . '(?:$|\/)/i', $_SERVER['HTTP_REFERER']))){
+ // base64 encoded red image that says 'no hotlinkers'
+ // nothing to worry about! :)
+ $imgData = base64_decode("R0lGODlhUAAMAIAAAP8AAP///yH5BAAHAP8ALAAAAABQAAwAAAJpjI+py+0Po5y0OgAMjjv01YUZ\nOGplhWXfNa6JCLnWkXplrcBmW+spbwvaVr/cDyg7IoFC2KbYVC2NQ5MQ4ZNao9Ynzjl9ScNYpneb\nDULB3RP6JuPuaGfuuV4fumf8PuvqFyhYtjdoeFgAADs=");
+ header('Content-Type: image/gif');
+ header('Content-Length: ' . sizeof($imgData));
+ header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+ header("Pragma: no-cache");
+ header('Expires: ' . gmdate ('D, d M Y H:i:s', time()));
+ echo $imgData;
+ return false;
+ exit(0);
+ }
+ if(preg_match('/^https?:\/\/[^\/]+/i', $this->src)){
+ $this->debug(2, "Is a request for an external URL: " . $this->src);
+ $this->isURL = true;
+ } else {
+ $this->debug(2, "Is a request for an internal file: " . $this->src);
+ }
+ if($this->isURL && (! ALLOW_EXTERNAL)){
+ $this->error("You are not allowed to fetch images from an external website.");
+ return false;
+ }
+ if($this->isURL){
+ if(ALLOW_ALL_EXTERNAL_SITES){
+ $this->debug(2, "Fetching from all external sites is enabled.");
+ } else {
+ $this->debug(2, "Fetching only from selected external sites is enabled.");
+ $allowed = false;
+ foreach($ALLOWED_SITES as $site){
+ if ((strtolower(substr($this->url['host'],-strlen($site)-1)) === strtolower(".$site")) || (strtolower($this->url['host'])===strtolower($site))) {
+ $this->debug(3, "URL hostname {$this->url['host']} matches $site so allowing.");
+ $allowed = true;
+ }
+ }
+ if(! $allowed){
+ return $this->error("You may not fetch images from that site. To enable this site in timthumb, you can either add it to \$ALLOWED_SITES and set ALLOW_EXTERNAL=true. Or you can set ALLOW_ALL_EXTERNAL_SITES=true, depending on your security needs.");
+ }
+ }
+ }
+
+ $cachePrefix = ($this->isURL ? '_ext_' : '_int_');
+ if($this->isURL){
+ $arr = explode('&', $_SERVER ['QUERY_STRING']);
+ asort($arr);
+ $this->cachefile = $this->cacheDirectory . '/' . FILE_CACHE_PREFIX . $cachePrefix . md5($this->salt . implode('', $arr) . $this->fileCacheVersion) . FILE_CACHE_SUFFIX;
+ } else {
+ $this->localImage = $this->getLocalImagePath($this->src);
+ if(! $this->localImage){
+ $this->debug(1, "Could not find the local image: {$this->localImage}");
+ $this->error("Could not find the internal image you specified.");
+ $this->set404();
+ return false;
+ }
+ $this->debug(1, "Local image path is {$this->localImage}");
+ $this->localImageMTime = @filemtime($this->localImage);
+ //We include the mtime of the local file in case in changes on disk.
+ $this->cachefile = $this->cacheDirectory . '/' . FILE_CACHE_PREFIX . $cachePrefix . md5($this->salt . $this->localImageMTime . $_SERVER ['QUERY_STRING'] . $this->fileCacheVersion) . FILE_CACHE_SUFFIX;
+ }
+ $this->debug(2, "Cache file is: " . $this->cachefile);
+
+ return true;
+ }
+ public function __destruct(){
+ foreach($this->toDeletes as $del){
+ $this->debug(2, "Deleting temp file $del");
+ @unlink($del);
+ }
+ }
+ public function run(){
+ if($this->isURL){
+ if(! ALLOW_EXTERNAL){
+ $this->debug(1, "Got a request for an external image but ALLOW_EXTERNAL is disabled so returning error msg.");
+ $this->error("You are not allowed to fetch images from an external website.");
+ return false;
+ }
+ $this->debug(3, "Got request for external image. Starting serveExternalImage.");
+ if($this->param('webshot')){
+ if(WEBSHOT_ENABLED){
+ $this->debug(3, "webshot param is set, so we're going to take a webshot.");
+ $this->serveWebshot();
+ } else {
+ $this->error("You added the webshot parameter but webshots are disabled on this server. You need to set WEBSHOT_ENABLED == true to enable webshots.");
+ }
+ } else {
+ $this->debug(3, "webshot is NOT set so we're going to try to fetch a regular image.");
+ $this->serveExternalImage();
+
+ }
+ } else {
+ $this->debug(3, "Got request for internal image. Starting serveInternalImage()");
+ $this->serveInternalImage();
+ }
+ return true;
+ }
+ protected function handleErrors(){
+ if($this->haveErrors()){
+ if(NOT_FOUND_IMAGE && $this->is404()){
+ if($this->serveImg(NOT_FOUND_IMAGE)){
+ exit(0);
+ } else {
+ $this->error("Additionally, the 404 image that is configured could not be found or there was an error serving it.");
+ }
+ }
+ if(ERROR_IMAGE){
+ if($this->serveImg(ERROR_IMAGE)){
+ exit(0);
+ } else {
+ $this->error("Additionally, the error image that is configured could not be found or there was an error serving it.");
+ }
+ }
+ $this->serveErrors();
+ exit(0);
+ }
+ return false;
+ }
+ protected function tryBrowserCache(){
+ if(BROWSER_CACHE_DISABLE){ $this->debug(3, "Browser caching is disabled"); return false; }
+ if(!empty($_SERVER['HTTP_IF_MODIFIED_SINCE']) ){
+ $this->debug(3, "Got a conditional get");
+ $mtime = false;
+ //We've already checked if the real file exists in the constructor
+ if(! is_file($this->cachefile)){
+ //If we don't have something cached, regenerate the cached image.
+ return false;
+ }
+ if($this->localImageMTime){
+ $mtime = $this->localImageMTime;
+ $this->debug(3, "Local real file's modification time is $mtime");
+ } else if(is_file($this->cachefile)){ //If it's not a local request then use the mtime of the cached file to determine the 304
+ $mtime = @filemtime($this->cachefile);
+ $this->debug(3, "Cached file's modification time is $mtime");
+ }
+ if(! $mtime){ return false; }
+
+ $iftime = strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']);
+ $this->debug(3, "The conditional get's if-modified-since unixtime is $iftime");
+ if($iftime < 1){
+ $this->debug(3, "Got an invalid conditional get modified since time. Returning false.");
+ return false;
+ }
+ if($iftime < $mtime){ //Real file or cache file has been modified since last request, so force refetch.
+ $this->debug(3, "File has been modified since last fetch.");
+ return false;
+ } else { //Otherwise serve a 304
+ $this->debug(3, "File has not been modified since last get, so serving a 304.");
+ header ($_SERVER['SERVER_PROTOCOL'] . ' 304 Not Modified');
+ $this->debug(1, "Returning 304 not modified");
+ return true;
+ }
+ }
+ return false;
+ }
+ protected function tryServerCache(){
+ $this->debug(3, "Trying server cache");
+ if(file_exists($this->cachefile)){
+ $this->debug(3, "Cachefile {$this->cachefile} exists");
+ if($this->isURL){
+ $this->debug(3, "This is an external request, so checking if the cachefile is empty which means the request failed previously.");
+ if(filesize($this->cachefile) < 1){
+ $this->debug(3, "Found an empty cachefile indicating a failed earlier request. Checking how old it is.");
+ //Fetching error occured previously
+ if(time() - @filemtime($this->cachefile) > WAIT_BETWEEN_FETCH_ERRORS){
+ $this->debug(3, "File is older than " . WAIT_BETWEEN_FETCH_ERRORS . " seconds. Deleting and returning false so app can try and load file.");
+ @unlink($this->cachefile);
+ return false; //to indicate we didn't serve from cache and app should try and load
+ } else {
+ $this->debug(3, "Empty cachefile is still fresh so returning message saying we had an error fetching this image from remote host.");
+ $this->set404();
+ $this->error("An error occured fetching image.");
+ return false;
+ }
+ }
+ } else {
+ $this->debug(3, "Trying to serve cachefile {$this->cachefile}");
+ }
+ if($this->serveCacheFile()){
+ $this->debug(3, "Succesfully served cachefile {$this->cachefile}");
+ return true;
+ } else {
+ $this->debug(3, "Failed to serve cachefile {$this->cachefile} - Deleting it from cache.");
+ //Image serving failed. We can't retry at this point, but lets remove it from cache so the next request recreates it
+ @unlink($this->cachefile);
+ return true;
+ }
+ }
+ }
+ protected function error($err){
+ $this->debug(3, "Adding error message: $err");
+ $this->errors[] = $err;
+ return false;
+
+ }
+ protected function haveErrors(){
+ if(sizeof($this->errors) > 0){
+ return true;
+ }
+ return false;
+ }
+ protected function serveErrors(){
+ header ($_SERVER['SERVER_PROTOCOL'] . ' 400 Bad Request');
+ $html = '<ul>';
+ foreach($this->errors as $err){
+ $html .= '<li>' . htmlentities($err) . '</li>';
+ }
+ $html .= '</ul>';
+ echo '<h1>A TimThumb error has occured</h1>The following error(s) occured:<br />' . $html . '<br />';
+ echo '<br />Query String : ' . htmlentities ($_SERVER['QUERY_STRING']);
+ echo '<br />TimThumb version : ' . VERSION . '</pre>';
+ }
+ protected function serveInternalImage(){
+ $this->debug(3, "Local image path is $this->localImage");
+ if(! $this->localImage){
+ $this->sanityFail("localImage not set after verifying it earlier in the code.");
+ return false;
+ }
+ $fileSize = filesize($this->localImage);
+ if($fileSize > MAX_FILE_SIZE){
+ $this->error("The file you specified is greater than the maximum allowed file size.");
+ return false;
+ }
+ if($fileSize <= 0){
+ $this->error("The file you specified is <= 0 bytes.");
+ return false;
+ }
+ $this->debug(3, "Calling processImageAndWriteToCache() for local image.");
+ if($this->processImageAndWriteToCache($this->localImage)){
+ $this->serveCacheFile();
+ return true;
+ } else {
+ return false;
+ }
+ }
+ protected function cleanCache(){
+ if (FILE_CACHE_TIME_BETWEEN_CLEANS < 0) {
+ return;
+ }
+ $this->debug(3, "cleanCache() called");
+ $lastCleanFile = $this->cacheDirectory . '/timthumb_cacheLastCleanTime.touch';
+
+ //If this is a new timthumb installation we need to create the file
+ if(! is_file($lastCleanFile)){
+ $this->debug(1, "File tracking last clean doesn't exist. Creating $lastCleanFile");
+ if (!touch($lastCleanFile)) {
+ $this->error("Could not create cache clean timestamp file.");
+ }
+ return;
+ }
+ if(@filemtime($lastCleanFile) < (time() - FILE_CACHE_TIME_BETWEEN_CLEANS) ){ //Cache was last cleaned more than 1 day ago
+ $this->debug(1, "Cache was last cleaned more than " . FILE_CACHE_TIME_BETWEEN_CLEANS . " seconds ago. Cleaning now.");
+ // Very slight race condition here, but worst case we'll have 2 or 3 servers cleaning the cache simultaneously once a day.
+ if (!touch($lastCleanFile)) {
+ $this->error("Could not create cache clean timestamp file.");
+ }
+ $files = glob($this->cacheDirectory . '/*' . FILE_CACHE_SUFFIX);
+ if ($files) {
+ $timeAgo = time() - FILE_CACHE_MAX_FILE_AGE;
+ foreach($files as $file){
+ if(@filemtime($file) < $timeAgo){
+ $this->debug(3, "Deleting cache file $file older than max age: " . FILE_CACHE_MAX_FILE_AGE . " seconds");
+ @unlink($file);
+ }
+ }
+ }
+ return true;
+ } else {
+ $this->debug(3, "Cache was cleaned less than " . FILE_CACHE_TIME_BETWEEN_CLEANS . " seconds ago so no cleaning needed.");
+ }
+ return false;
+ }
+ protected function processImageAndWriteToCache($localImage){
+ $sData = getimagesize($localImage);
+ $origType = $sData[2];
+ $mimeType = $sData['mime'];
+
+ $this->debug(3, "Mime type of image is $mimeType");
+ if(! preg_match('/^image\/(?:gif|jpg|jpeg|png)$/i', $mimeType)){
+ return $this->error("The image being resized is not a valid gif, jpg or png.");
+ }
+
+ if (!function_exists ('imagecreatetruecolor')) {
+ return $this->error('GD Library Error: imagecreatetruecolor does not exist - please contact your webhost and ask them to install the GD library');
+ }
+
+ if (function_exists ('imagefilter') && defined ('IMG_FILTER_NEGATE')) {
+ $imageFilters = array (
+ 1 => array (IMG_FILTER_NEGATE, 0),
+ 2 => array (IMG_FILTER_GRAYSCALE, 0),
+ 3 => array (IMG_FILTER_BRIGHTNESS, 1),
+ 4 => array (IMG_FILTER_CONTRAST, 1),
+ 5 => array (IMG_FILTER_COLORIZE, 4),
+ 6 => array (IMG_FILTER_EDGEDETECT, 0),
+ 7 => array (IMG_FILTER_EMBOSS, 0),
+ 8 => array (IMG_FILTER_GAUSSIAN_BLUR, 0),
+ 9 => array (IMG_FILTER_SELECTIVE_BLUR, 0),
+ 10 => array (IMG_FILTER_MEAN_REMOVAL, 0),
+ 11 => array (IMG_FILTER_SMOOTH, 0),
+ );
+ }
+
+ // get standard input properties
+ $new_width = (int) abs ($this->param('w', 0));
+ $new_height = (int) abs ($this->param('h', 0));
+ $zoom_crop = (int) $this->param('zc', DEFAULT_ZC);
+ $quality = (int) abs ($this->param('q', DEFAULT_Q));
+ $align = $this->cropTop ? 't' : $this->param('a', 'c');
+ $filters = $this->param('f', DEFAULT_F);
+ $sharpen = (bool) $this->param('s', DEFAULT_S);
+ $canvas_color = $this->param('cc', DEFAULT_CC);
+ $canvas_trans = (bool) $this->param('ct', '1');
+
+ // set default width and height if neither are set already
+ if ($new_width == 0 && $new_height == 0) {
+ $new_width = 100;
+ $new_height = 100;
+ }
+
+ // ensure size limits can not be abused
+ $new_width = min ($new_width, MAX_WIDTH);
+ $new_height = min ($new_height, MAX_HEIGHT);
+
+ // set memory limit to be able to have enough space to resize larger images
+ $this->setMemoryLimit();
+
+ // open the existing image
+ $image = $this->openImage ($mimeType, $localImage);
+ if ($image === false) {
+ return $this->error('Unable to open image.');
+ }
+
+ // Get original width and height
+ $width = imagesx ($image);
+ $height = imagesy ($image);
+ $origin_x = 0;
+ $origin_y = 0;
+
+ // generate new w/h if not provided
+ if ($new_width && !$new_height) {
+ $new_height = floor ($height * ($new_width / $width));
+ } else if ($new_height && !$new_width) {
+ $new_width = floor ($width * ($new_height / $height));
+ }
+
+ // scale down and add borders
+ if ($zoom_crop == 3) {
+
+ $final_height = $height * ($new_width / $width);
+
+ if ($final_height > $new_height) {
+ $new_width = $width * ($new_height / $height);
+ } else {
+ $new_height = $final_height;
+ }
+
+ }
+
+ // create a new true color image
+ $canvas = imagecreatetruecolor ($new_width, $new_height);
+ imagealphablending ($canvas, false);
+
+ if (strlen($canvas_color) == 3) { //if is 3-char notation, edit string into 6-char notation
+ $canvas_color = str_repeat(substr($canvas_color, 0, 1), 2) . str_repeat(substr($canvas_color, 1, 1), 2) . str_repeat(substr($canvas_color, 2, 1), 2);
+ } else if (strlen($canvas_color) != 6) {
+ $canvas_color = DEFAULT_CC; // on error return default canvas color
+ }
+
+ $canvas_color_R = hexdec (substr ($canvas_color, 0, 2));
+ $canvas_color_G = hexdec (substr ($canvas_color, 2, 2));
+ $canvas_color_B = hexdec (substr ($canvas_color, 4, 2));
+
+ // Create a new transparent color for image
+ // If is a png and PNG_IS_TRANSPARENT is false then remove the alpha transparency
+ // (and if is set a canvas color show it in the background)
+ if(preg_match('/^image\/png$/i', $mimeType) && !PNG_IS_TRANSPARENT && $canvas_trans){
+ $color = imagecolorallocatealpha ($canvas, $canvas_color_R, $canvas_color_G, $canvas_color_B, 127);
+ }else{
+ $color = imagecolorallocatealpha ($canvas, $canvas_color_R, $canvas_color_G, $canvas_color_B, 0);
+ }
+
+
+ // Completely fill the background of the new image with allocated color.
+ imagefill ($canvas, 0, 0, $color);
+
+ // scale down and add borders
+ if ($zoom_crop == 2) {
+
+ $final_height = $height * ($new_width / $width);
+
+ if ($final_height > $new_height) {
+
+ $origin_x = $new_width / 2;
+ $new_width = $width * ($new_height / $height);
+ $origin_x = round ($origin_x - ($new_width / 2));
+
+ } else {
+
+ $origin_y = $new_height / 2;
+ $new_height = $final_height;
+ $origin_y = round ($origin_y - ($new_height / 2));
+
+ }
+
+ }
+
+ // Restore transparency blending
+ imagesavealpha ($canvas, true);
+
+ if ($zoom_crop > 0) {
+
+ $src_x = $src_y = 0;
+ $src_w = $width;
+ $src_h = $height;
+
+ $cmp_x = $width / $new_width;
+ $cmp_y = $height / $new_height;
+
+ // calculate x or y coordinate and width or height of source
+ if ($cmp_x > $cmp_y) {
+
+ $src_w = round ($width / $cmp_x * $cmp_y);
+ $src_x = round (($width - ($width / $cmp_x * $cmp_y)) / 2);
+
+ } else if ($cmp_y > $cmp_x) {
+
+ $src_h = round ($height / $cmp_y * $cmp_x);
+ $src_y = round (($height - ($height / $cmp_y * $cmp_x)) / 2);
+
+ }
+
+ // positional cropping!
+ if ($align) {
+ if (strpos ($align, 't') !== false) {
+ $src_y = 0;
+ }
+ if (strpos ($align, 'b') !== false) {
+ $src_y = $height - $src_h;
+ }
+ if (strpos ($align, 'l') !== false) {
+ $src_x = 0;
+ }
+ if (strpos ($align, 'r') !== false) {
+ $src_x = $width - $src_w;
+ }
+ }
+
+ imagecopyresampled ($canvas, $image, $origin_x, $origin_y, $src_x, $src_y, $new_width, $new_height, $src_w, $src_h);
+
+ } else {
+
+ // copy and resize part of an image with resampling
+ imagecopyresampled ($canvas, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
+
+ }
+
+ if ($filters != '' && function_exists ('imagefilter') && defined ('IMG_FILTER_NEGATE')) {
+ // apply filters to image
+ $filterList = explode ('|', $filters);
+ foreach ($filterList as $fl) {
+
+ $filterSettings = explode (',', $fl);
+ if (isset ($imageFilters[$filterSettings[0]])) {
+
+ for ($i = 0; $i < 4; $i ++) {
+ if (!isset ($filterSettings[$i])) {
+ $filterSettings[$i] = null;
+ } else {
+ $filterSettings[$i] = (int) $filterSettings[$i];
+ }
+ }
+
+ switch ($imageFilters[$filterSettings[0]][1]) {
+
+ case 1:
+
+ imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1]);
+ break;
+
+ case 2:
+
+ imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2]);
+ break;
+
+ case 3:
+
+ imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3]);
+ break;
+
+ case 4:
+
+ imagefilter ($canvas, $imageFilters[$filterSettings[0]][0], $filterSettings[1], $filterSettings[2], $filterSettings[3], $filterSettings[4]);
+ break;
+
+ default:
+
+ imagefilter ($canvas, $imageFilters[$filterSettings[0]][0]);
+ break;
+
+ }
+ }
+ }
+ }
+
+ // sharpen image
+ if ($sharpen && function_exists ('imageconvolution')) {
+
+ $sharpenMatrix = array (
+ array (-1,-1,-1),
+ array (-1,16,-1),
+ array (-1,-1,-1),
+ );
+
+ $divisor = 8;
+ $offset = 0;
+
+ imageconvolution ($canvas, $sharpenMatrix, $divisor, $offset);
+
+ }
+ //Straight from Wordpress core code. Reduces filesize by up to 70% for PNG's
+ if ( (IMAGETYPE_PNG == $origType || IMAGETYPE_GIF == $origType) && function_exists('imageistruecolor') && !imageistruecolor( $image ) && imagecolortransparent( $image ) > 0 ){
+ imagetruecolortopalette( $canvas, false, imagecolorstotal( $image ) );
+ }
+
+ $imgType = "";
+ $tempfile = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
+ if(preg_match('/^image\/(?:jpg|jpeg)$/i', $mimeType)){
+ $imgType = 'jpg';
+ imagejpeg($canvas, $tempfile, $quality);
+ } else if(preg_match('/^image\/png$/i', $mimeType)){
+ $imgType = 'png';
+ imagepng($canvas, $tempfile, floor($quality * 0.09));
+ } else if(preg_match('/^image\/gif$/i', $mimeType)){
+ $imgType = 'gif';
+ imagegif($canvas, $tempfile);
+ } else {
+ return $this->sanityFail("Could not match mime type after verifying it previously.");
+ }
+
+ if($imgType == 'png' && OPTIPNG_ENABLED && OPTIPNG_PATH && @is_file(OPTIPNG_PATH)){
+ $exec = OPTIPNG_PATH;
+ $this->debug(3, "optipng'ing $tempfile");
+ $presize = filesize($tempfile);
+ $out = `$exec -o1 $tempfile`; //you can use up to -o7 but it really slows things down
+ clearstatcache();
+ $aftersize = filesize($tempfile);
+ $sizeDrop = $presize - $aftersize;
+ if($sizeDrop > 0){
+ $this->debug(1, "optipng reduced size by $sizeDrop");
+ } else if($sizeDrop < 0){
+ $this->debug(1, "optipng increased size! Difference was: $sizeDrop");
+ } else {
+ $this->debug(1, "optipng did not change image size.");
+ }
+ } else if($imgType == 'png' && PNGCRUSH_ENABLED && PNGCRUSH_PATH && @is_file(PNGCRUSH_PATH)){
+ $exec = PNGCRUSH_PATH;
+ $tempfile2 = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
+ $this->debug(3, "pngcrush'ing $tempfile to $tempfile2");
+ $out = `$exec $tempfile $tempfile2`;
+ $todel = "";
+ if(is_file($tempfile2)){
+ $sizeDrop = filesize($tempfile) - filesize($tempfile2);
+ if($sizeDrop > 0){
+ $this->debug(1, "pngcrush was succesful and gave a $sizeDrop byte size reduction");
+ $todel = $tempfile;
+ $tempfile = $tempfile2;
+ } else {
+ $this->debug(1, "pngcrush did not reduce file size. Difference was $sizeDrop bytes.");
+ $todel = $tempfile2;
+ }
+ } else {
+ $this->debug(3, "pngcrush failed with output: $out");
+ $todel = $tempfile2;
+ }
+ @unlink($todel);
+ }
+
+ $this->debug(3, "Rewriting image with security header.");
+ $tempfile4 = tempnam($this->cacheDirectory, 'timthumb_tmpimg_');
+ $context = stream_context_create ();
+ $fp = fopen($tempfile,'r',0,$context);
+ file_put_contents($tempfile4, $this->filePrependSecurityBlock . $imgType . ' ?' . '>'); //6 extra bytes, first 3 being image type
+ file_put_contents($tempfile4, $fp, FILE_APPEND);
+ fclose($fp);
+ @unlink($tempfile);
+ $this->debug(3, "Locking and replacing cache file.");
+ $lockFile = $this->cachefile . '.lock';
+ $fh = fopen($lockFile, 'w');
+ if(! $fh){
+ return $this->error("Could not open the lockfile for writing an image.");
+ }
+ if(flock($fh, LOCK_EX)){
+ @unlink($this->cachefile); //rename generally overwrites, but doing this in case of platform specific quirks. File might not exist yet.
+ rename($tempfile4, $this->cachefile);
+ flock($fh, LOCK_UN);
+ fclose($fh);
+ @unlink($lockFile);
+ } else {
+ fclose($fh);
+ @unlink($lockFile);
+ @unlink($tempfile4);
+ return $this->error("Could not get a lock for writing.");
+ }
+ $this->debug(3, "Done image replace with security header. Cleaning up and running cleanCache()");
+ imagedestroy($canvas);
+ imagedestroy($image);
+ return true;
+ }
+ protected function calcDocRoot(){
+ $docRoot = @$_SERVER['DOCUMENT_ROOT'];
+ if (defined('LOCAL_FILE_BASE_DIRECTORY')) {
+ $docRoot = LOCAL_FILE_BASE_DIRECTORY;
+ }
+ if(!isset($docRoot)){
+ $this->debug(3, "DOCUMENT_ROOT is not set. This is probably windows. Starting search 1.");
+ if(isset($_SERVER['SCRIPT_FILENAME'])){
+ $docRoot = str_replace( '\\', '/', substr($_SERVER['SCRIPT_FILENAME'], 0, 0-strlen($_SERVER['PHP_SELF'])));
+ $this->debug(3, "Generated docRoot using SCRIPT_FILENAME and PHP_SELF as: $docRoot");
+ }
+ }
+ if(!isset($docRoot)){
+ $this->debug(3, "DOCUMENT_ROOT still is not set. Starting search 2.");
+ if(isset($_SERVER['PATH_TRANSLATED'])){
+ $docRoot = str_replace( '\\', '/', substr(str_replace('\\\\', '\\', $_SERVER['PATH_TRANSLATED']), 0, 0-strlen($_SERVER['PHP_SELF'])));
+ $this->debug(3, "Generated docRoot using PATH_TRANSLATED and PHP_SELF as: $docRoot");
+ }
+ }
+ if($docRoot && $_SERVER['DOCUMENT_ROOT'] != '/'){ $docRoot = preg_replace('/\/$/', '', $docRoot); }
+ $this->debug(3, "Doc root is: " . $docRoot);
+ $this->docRoot = $docRoot;
+
+ }
+ protected function getLocalImagePath($src){
+ $src = ltrim($src, '/'); //strip off the leading '/'
+ if(! $this->docRoot){
+ $this->debug(3, "We have no document root set, so as a last resort, lets check if the image is in the current dir and serve that.");
+ //We don't support serving images outside the current dir if we don't have a doc root for security reasons.
+ $file = preg_replace('/^.*?([^\/\\\\]+)$/', '$1', $src); //strip off any path info and just leave the filename.
+ if(is_file($file)){
+ return $this->realpath($file);
+ }
+ return $this->error("Could not find your website document root and the file specified doesn't exist in timthumbs directory. We don't support serving files outside timthumb's directory without a document root for security reasons.");
+ } //Do not go past this point without docRoot set
+
+ //Try src under docRoot
+ if(file_exists ($this->docRoot . '/' . $src)) {
+ $this->debug(3, "Found file as " . $this->docRoot . '/' . $src);
+ $real = $this->realpath($this->docRoot . '/' . $src);
+ if(stripos($real, $this->docRoot) === 0){
+ return $real;
+ } else {
+ $this->debug(1, "Security block: The file specified occurs outside the document root.");
+ //allow search to continue
+ }
+ }
+ //Check absolute paths and then verify the real path is under doc root
+ $absolute = $this->realpath('/' . $src);
+ if($absolute && file_exists($absolute)){ //realpath does file_exists check, so can probably skip the exists check here
+ $this->debug(3, "Found absolute path: $absolute");
+ if(! $this->docRoot){ $this->sanityFail("docRoot not set when checking absolute path."); }
+ if(stripos($absolute, $this->docRoot) === 0){
+ return $absolute;
+ } else {
+ $this->debug(1, "Security block: The file specified occurs outside the document root.");
+ //and continue search
+ }
+ }
+
+ $base = $this->docRoot;
+
+ // account for Windows directory structure
+ if (strstr($_SERVER['SCRIPT_FILENAME'],':')) {
+ $sub_directories = explode('\\', str_replace($this->docRoot, '', $_SERVER['SCRIPT_FILENAME']));
+ } else {
+ $sub_directories = explode('/', str_replace($this->docRoot, '', $_SERVER['SCRIPT_FILENAME']));
+ }
+
+ foreach ($sub_directories as $sub){
+ $base .= $sub . '/';
+ $this->debug(3, "Trying file as: " . $base . $src);
+ if(file_exists($base . $src)){
+ $this->debug(3, "Found file as: " . $base . $src);
+ $real = $this->realpath($base . $src);
+ if(stripos($real, $this->realpath($this->docRoot)) === 0){
+ return $real;
+ } else {
+ $this->debug(1, "Security block: The file specified occurs outside the document root.");
+ //And continue search
+ }
+ }
+ }
+ return false;
+ }
+ protected function realpath($path){
+ //try to remove any relative paths
+ $remove_relatives = '/\w+\/\.\.\//';
+ while(preg_match($remove_relatives,$path)){
+ $path = preg_replace($remove_relatives, '', $path);
+ }
+ //if any remain use PHP realpath to strip them out, otherwise return $path
+ //if using realpath, any symlinks will also be resolved
+ return preg_match('#^\.\./|/\.\./#', $path) ? realpath($path) : $path;
+ }
+ protected function toDelete($name){
+ $this->debug(3, "Scheduling file $name to delete on destruct.");
+ $this->toDeletes[] = $name;
+ }
+ protected function serveWebshot(){
+ $this->debug(3, "Starting serveWebshot");
+ $instr = "Please follow the instructions at http://code.google.com/p/timthumb/ to set your server up for taking website screenshots.";
+ if(! is_file(WEBSHOT_CUTYCAPT)){
+ return $this->error("CutyCapt is not installed. $instr");
+ }
+ if(! is_file(WEBSHOT_XVFB)){
+ return $this->Error("Xvfb is not installed. $instr");
+ }
+ $cuty = WEBSHOT_CUTYCAPT;
+ $xv = WEBSHOT_XVFB;
+ $screenX = WEBSHOT_SCREEN_X;
+ $screenY = WEBSHOT_SCREEN_Y;
+ $colDepth = WEBSHOT_COLOR_DEPTH;
+ $format = WEBSHOT_IMAGE_FORMAT;
+ $timeout = WEBSHOT_TIMEOUT * 1000;
+ $ua = WEBSHOT_USER_AGENT;
+ $jsOn = WEBSHOT_JAVASCRIPT_ON ? 'on' : 'off';
+ $javaOn = WEBSHOT_JAVA_ON ? 'on' : 'off';
+ $pluginsOn = WEBSHOT_PLUGINS_ON ? 'on' : 'off';
+ $proxy = WEBSHOT_PROXY ? ' --http-proxy=' . WEBSHOT_PROXY : '';
+ $tempfile = tempnam($this->cacheDirectory, 'timthumb_webshot');
+ $url = $this->src;
+ if(! preg_match('/^https?:\/\/[a-zA-Z0-9\.\-]+/i', $url)){
+ return $this->error("Invalid URL supplied.");
+ }
+ $url = preg_replace('/[^A-Za-z0-9\-\.\_\~:\/\?\#\[\]\@\!\$\&\'\(\)\*\+\,\;\=]+/', '', $url); //RFC 3986
+ //Very important we don't allow injection of shell commands here. URL is between quotes and we are only allowing through chars allowed by a the RFC
+ // which AFAIKT can't be used for shell injection.
+ if(WEBSHOT_XVFB_RUNNING){
+ putenv('DISPLAY=:100.0');
+ $command = "$cuty $proxy --max-wait=$timeout --user-agent=\"$ua\" --javascript=$jsOn --java=$javaOn --plugins=$pluginsOn --js-can-open-windows=off --url=\"$url\" --out-format=$format --out=$tempfile";
+ } else {
+ $command = "$xv --server-args=\"-screen 0, {$screenX}x{$screenY}x{$colDepth}\" $cuty $proxy --max-wait=$timeout --user-agent=\"$ua\" --javascript=$jsOn --java=$javaOn --plugins=$pluginsOn --js-can-open-windows=off --url=\"$url\" --out-format=$format --out=$tempfile";
+ }
+ $this->debug(3, "Executing command: $command");
+ $out = `$command`;
+ $this->debug(3, "Received output: $out");
+ if(! is_file($tempfile)){
+ $this->set404();
+ return $this->error("The command to create a thumbnail failed.");
+ }
+ $this->cropTop = true;
+ if($this->processImageAndWriteToCache($tempfile)){
+ $this->debug(3, "Image processed succesfully. Serving from cache");
+ return $this->serveCacheFile();
+ } else {
+ return false;
+ }
+ }
+ protected function serveExternalImage(){
+ if(! preg_match('/^https?:\/\/[a-zA-Z0-9\-\.]+/i', $this->src)){
+ $this->error("Invalid URL supplied.");
+ return false;
+ }
+ $tempfile = tempnam($this->cacheDirectory, 'timthumb');
+ $this->debug(3, "Fetching external image into temporary file $tempfile");
+ $this->toDelete($tempfile);
+ #fetch file here
+ if(! $this->getURL($this->src, $tempfile)){
+ @unlink($this->cachefile);
+ touch($this->cachefile);
+ $this->debug(3, "Error fetching URL: " . $this->lastURLError);
+ $this->error("Error reading the URL you specified from remote host." . $this->lastURLError);
+ return false;
+ }
+
+ $mimeType = $this->getMimeType($tempfile);
+ if(! preg_match("/^image\/(?:jpg|jpeg|gif|png)$/i", $mimeType)){
+ $this->debug(3, "Remote file has invalid mime type: $mimeType");
+ @unlink($this->cachefile);
+ touch($this->cachefile);
+ $this->error("The remote file is not a valid image.");
+ return false;
+ }
+ if($this->processImageAndWriteToCache($tempfile)){
+ $this->debug(3, "Image processed succesfully. Serving from cache");
+ return $this->serveCacheFile();
+ } else {
+ return false;
+ }
+ }
+ public static function curlWrite($h, $d){
+ fwrite(self::$curlFH, $d);
+ self::$curlDataWritten += strlen($d);
+ if(self::$curlDataWritten > MAX_FILE_SIZE){
+ return 0;
+ } else {
+ return strlen($d);
+ }
+ }
+ protected function serveCacheFile(){
+ $this->debug(3, "Serving {$this->cachefile}");
+ if(! is_file($this->cachefile)){
+ $this->error("serveCacheFile called in timthumb but we couldn't find the cached file.");
+ return false;
+ }
+ $fp = fopen($this->cachefile, 'rb');
+ if(! $fp){ return $this->error("Could not open cachefile."); }
+ fseek($fp, strlen($this->filePrependSecurityBlock), SEEK_SET);
+ $imgType = fread($fp, 3);
+ fseek($fp, 3, SEEK_CUR);
+ if(ftell($fp) != strlen($this->filePrependSecurityBlock) + 6){
+ @unlink($this->cachefile);
+ return $this->error("The cached image file seems to be corrupt.");
+ }
+ $imageDataSize = filesize($this->cachefile) - (strlen($this->filePrependSecurityBlock) + 6);
+ $this->sendImageHeaders($imgType, $imageDataSize);
+ $bytesSent = @fpassthru($fp);
+ fclose($fp);
+ if($bytesSent > 0){
+ return true;
+ }
+ $content = file_get_contents ($this->cachefile);
+ if ($content != FALSE) {
+ $content = substr($content, strlen($this->filePrependSecurityBlock) + 6);
+ echo $content;
+ $this->debug(3, "Served using file_get_contents and echo");
+ return true;
+ } else {
+ $this->error("Cache file could not be loaded.");
+ return false;
+ }
+ }
+ protected function sendImageHeaders($mimeType, $dataSize){
+ if(! preg_match('/^image\//i', $mimeType)){
+ $mimeType = 'image/' . $mimeType;
+ }
+ if(strtolower($mimeType) == 'image/jpg'){
+ $mimeType = 'image/jpeg';
+ }
+ $gmdate_expires = gmdate ('D, d M Y H:i:s', strtotime ('now +10 days')) . ' GMT';
+ $gmdate_modified = gmdate ('D, d M Y H:i:s') . ' GMT';
+ // send content headers then display image
+ header ('Content-Type: ' . $mimeType);
+ header ('Accept-Ranges: none'); //Changed this because we don't accept range requests
+ header ('Last-Modified: ' . $gmdate_modified);
+ header ('Content-Length: ' . $dataSize);
+ if(BROWSER_CACHE_DISABLE){
+ $this->debug(3, "Browser cache is disabled so setting non-caching headers.");
+ header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+ header("Pragma: no-cache");
+ header('Expires: ' . gmdate ('D, d M Y H:i:s', time()));
+ } else {
+ $this->debug(3, "Browser caching is enabled");
+ header('Cache-Control: max-age=' . BROWSER_CACHE_MAX_AGE . ', must-revalidate');
+ header('Expires: ' . $gmdate_expires);
+ }
+ return true;
+ }
+ protected function securityChecks(){
+ }
+ protected function param($property, $default = ''){
+ if (isset ($_GET[$property])) {
+ return $_GET[$property];
+ } else {
+ return $default;
+ }
+ }
+ protected function openImage($mimeType, $src){
+ switch ($mimeType) {
+ case 'image/jpeg':
+ $image = imagecreatefromjpeg ($src);
+ break;
+
+ case 'image/png':
+ $image = imagecreatefrompng ($src);
+ break;
+
+ case 'image/gif':
+ $image = imagecreatefromgif ($src);
+ break;
+
+ default:
+ $this->error("Unrecognised mimeType");
+ }
+
+ return $image;
+ }
+ protected function getIP(){
+ $rem = @$_SERVER["REMOTE_ADDR"];
+ $ff = @$_SERVER["HTTP_X_FORWARDED_FOR"];
+ $ci = @$_SERVER["HTTP_CLIENT_IP"];
+ if(preg_match('/^(?:192\.168|172\.16|10\.|127\.)/', $rem)){
+ if($ff){ return $ff; }
+ if($ci){ return $ci; }
+ return $rem;
+ } else {
+ if($rem){ return $rem; }
+ if($ff){ return $ff; }
+ if($ci){ return $ci; }
+ return "UNKNOWN";
+ }
+ }
+ protected function debug($level, $msg){
+ if(DEBUG_ON && $level <= DEBUG_LEVEL){
+ $execTime = sprintf('%.6f', microtime(true) - $this->startTime);
+ $tick = sprintf('%.6f', 0);
+ if($this->lastBenchTime > 0){
+ $tick = sprintf('%.6f', microtime(true) - $this->lastBenchTime);
+ }
+ $this->lastBenchTime = microtime(true);
+ error_log("TimThumb Debug line " . __LINE__ . " [$execTime : $tick]: $msg");
+ }
+ }
+ protected function sanityFail($msg){
+ return $this->error("There is a problem in the timthumb code. Message: Please report this error at <a href='http://code.google.com/p/timthumb/issues/list'>timthumb's bug tracking page</a>: $msg");
+ }
+ protected function getMimeType($file){
+ $info = getimagesize($file);
+ if(is_array($info) && $info['mime']){
+ return $info['mime'];
+ }
+ return '';
+ }
+ protected function setMemoryLimit(){
+ $inimem = ini_get('memory_limit');
+ $inibytes = timthumb::returnBytes($inimem);
+ $ourbytes = timthumb::returnBytes(MEMORY_LIMIT);
+ if($inibytes < $ourbytes){
+ ini_set ('memory_limit', MEMORY_LIMIT);
+ $this->debug(3, "Increased memory from $inimem to " . MEMORY_LIMIT);
+ } else {
+ $this->debug(3, "Not adjusting memory size because the current setting is " . $inimem . " and our size of " . MEMORY_LIMIT . " is smaller.");
+ }
+ }
+ protected static function returnBytes($size_str){
+ switch (substr ($size_str, -1))
+ {
+ case 'M': case 'm': return (int)$size_str * 1048576;
+ case 'K': case 'k': return (int)$size_str * 1024;
+ case 'G': case 'g': return (int)$size_str * 1073741824;
+ default: return $size_str;
+ }
+ }
+ protected function getURL($url, $tempfile){
+ $this->lastURLError = false;
+ $url = preg_replace('/ /', '%20', $url);
+ if(function_exists('curl_init')){
+ $this->debug(3, "Curl is installed so using it to fetch URL.");
+ self::$curlFH = fopen($tempfile, 'w');
+ if(! self::$curlFH){
+ $this->error("Could not open $tempfile for writing.");
+ return false;
+ }
+ self::$curlDataWritten = 0;
+ $this->debug(3, "Fetching url with curl: $url");
+ $curl = curl_init($url);
+ curl_setopt ($curl, CURLOPT_TIMEOUT, CURL_TIMEOUT);
+ curl_setopt ($curl, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30");
+ curl_setopt ($curl, CURLOPT_RETURNTRANSFER, TRUE);
+ curl_setopt ($curl, CURLOPT_HEADER, 0);
+ curl_setopt ($curl, CURLOPT_SSL_VERIFYPEER, FALSE);
+ curl_setopt ($curl, CURLOPT_WRITEFUNCTION, 'timthumb::curlWrite');
+ @curl_setopt ($curl, CURLOPT_FOLLOWLOCATION, true);
+ @curl_setopt ($curl, CURLOPT_MAXREDIRS, 10);
+
+ $curlResult = curl_exec($curl);
+ fclose(self::$curlFH);
+ $httpStatus = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+ if($httpStatus == 404){
+ $this->set404();
+ }
+ if($curlResult){
+ curl_close($curl);
+ return true;
+ } else {
+ $this->lastURLError = curl_error($curl);
+ curl_close($curl);
+ return false;
+ }
+ } else {
+ $img = @file_get_contents ($url);
+ if($img === false){
+ $err = error_get_last();
+ if(is_array($err) && $err['message']){
+ $this->lastURLError = $err['message'];
+ } else {
+ $this->lastURLError = $err;
+ }
+ if(preg_match('/404/', $this->lastURLError)){
+ $this->set404();
+ }
+
+ return false;
+ }
+ if(! file_put_contents($tempfile, $img)){
+ $this->error("Could not write to $tempfile.");
+ return false;
+ }
+ return true;
+ }
+
+ }
+ protected function serveImg($file){
+ $s = getimagesize($file);
+ if(! ($s && $s['mime'])){
+ return false;
+ }
+ header ('Content-Type: ' . $s['mime']);
+ header ('Content-Length: ' . filesize($file) );
+ header ('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
+ header ("Pragma: no-cache");
+ $bytes = @readfile($file);
+ if($bytes > 0){
+ return true;
+ }
+ $content = @file_get_contents ($file);
+ if ($content != FALSE){
+ echo $content;
+ return true;
+ }
+ return false;
+
+ }
+ protected function set404(){
+ $this->is404 = true;
+ }
+ protected function is404(){
+ return $this->is404;
+ }
+}
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