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timthumb.php 41.28 KB
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云落 authored 2015-04-21 01:58 . add
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<?php
/*本文件是主题缩略图产生文件*/
define ('VERSION', '2.8.13');
if( file_exists(dirname(__FILE__) . '/timthumb-config.php')) require_once('timthumb-config.php');
if(! defined('DEBUG_ON') ) define ('DEBUG_ON', false);
if(! defined('DEBUG_LEVEL') ) define ('DEBUG_LEVEL', 1);
if(! defined('MEMORY_LIMIT') ) define ('MEMORY_LIMIT', '30M');
if(! defined('BLOCK_EXTERNAL_LEECHERS') ) define ('BLOCK_EXTERNAL_LEECHERS', false);
if(! defined('DISPLAY_ERROR_MESSAGES') ) define ('DISPLAY_ERROR_MESSAGES', true);
if(! defined('ALLOW_EXTERNAL') ) define ('ALLOW_EXTERNAL', TRUE);
if(! defined('ALLOW_ALL_EXTERNAL_SITES') ) define ('ALLOW_ALL_EXTERNAL_SITES', false);
//上面这行,改成true则是允许所有外链
if(! defined('FILE_CACHE_ENABLED') ) define ('FILE_CACHE_ENABLED', TRUE);
if(! defined('FILE_CACHE_TIME_BETWEEN_CLEANS')) define ('FILE_CACHE_TIME_BETWEEN_CLEANS', 86400);
if(! defined('FILE_CACHE_MAX_FILE_AGE') ) define ('FILE_CACHE_MAX_FILE_AGE', 86400);
if(! defined('FILE_CACHE_SUFFIX') ) define ('FILE_CACHE_SUFFIX', '.timthumb.txt');
if(! defined('FILE_CACHE_PREFIX') ) define ('FILE_CACHE_PREFIX', 'timthumb');
if(! defined('FILE_CACHE_DIRECTORY') ) define ('FILE_CACHE_DIRECTORY', './cache');
if(! defined('MAX_FILE_SIZE') ) define ('MAX_FILE_SIZE', 10485760);
if(! defined('CURL_TIMEOUT') ) define ('CURL_TIMEOUT', 20);
if(! defined('WAIT_BETWEEN_FETCH_ERRORS') ) define ('WAIT_BETWEEN_FETCH_ERRORS', 3600);
//Browser caching
if(! defined('BROWSER_CACHE_MAX_AGE') ) define ('BROWSER_CACHE_MAX_AGE', 864000);
if(! defined('BROWSER_CACHE_DISABLE') ) define ('BROWSER_CACHE_DISABLE', false);
if(! defined('MAX_WIDTH') ) define ('MAX_WIDTH', 1500);
if(! defined('MAX_HEIGHT') ) define ('MAX_HEIGHT', 1500);
if(! defined('NOT_FOUND_IMAGE') ) define ('NOT_FOUND_IMAGE', '');
if(! defined('ERROR_IMAGE') ) define ('ERROR_IMAGE', '');
if(! defined('PNG_IS_TRANSPARENT') ) define ('PNG_IS_TRANSPARENT', FALSE);
if(! defined('DEFAULT_Q') ) define ('DEFAULT_Q', 90);
if(! defined('DEFAULT_ZC') ) define ('DEFAULT_ZC', 1);
if(! defined('DEFAULT_F') ) define ('DEFAULT_F', '');
if(! defined('DEFAULT_S') ) define ('DEFAULT_S', 0);
if(! defined('DEFAULT_CC') ) define ('DEFAULT_CC', 'ffffff');
if(! defined('DEFAULT_WIDTH') ) define ('DEFAULT_WIDTH', 100);
if(! defined('DEFAULT_HEIGHT') ) define ('DEFAULT_HEIGHT', 100);
if(! defined('OPTIPNG_ENABLED') ) define ('OPTIPNG_ENABLED', false);
if(! defined('OPTIPNG_PATH') ) define ('OPTIPNG_PATH', '/usr/bin/optipng');
if(! defined('PNGCRUSH_ENABLED') ) define ('PNGCRUSH_ENABLED', false);
if(! defined('PNGCRUSH_PATH') ) define ('PNGCRUSH_PATH', '/usr/bin/pngcrush');
if(! defined('WEBSHOT_ENABLED') ) define ('WEBSHOT_ENABLED', false);
if(! defined('WEBSHOT_CUTYCAPT') ) define ('WEBSHOT_CUTYCAPT', '/usr/local/bin/CutyCapt');
if(! defined('WEBSHOT_XVFB') ) define ('WEBSHOT_XVFB', '/usr/bin/xvfb-run');
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');
if(! defined('WEBSHOT_IMAGE_FORMAT') ) define ('WEBSHOT_IMAGE_FORMAT', 'png');
if(! defined('WEBSHOT_TIMEOUT') ) define ('WEBSHOT_TIMEOUT', '20');
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");
if(! defined('WEBSHOT_JAVASCRIPT_ON') ) define ('WEBSHOT_JAVASCRIPT_ON', true);
if(! defined('WEBSHOT_JAVA_ON') ) define ('WEBSHOT_JAVA_ON', false);
if(! defined('WEBSHOT_PLUGINS_ON') ) define ('WEBSHOT_PLUGINS_ON', true);
if(! defined('WEBSHOT_PROXY') ) define ('WEBSHOT_PROXY', '');
if(! defined('WEBSHOT_XVFB_RUNNING') ) define ('WEBSHOT_XVFB_RUNNING', false);
if(! isset($ALLOWED_SITES)){
$ALLOWED_SITES = array (
'picasa.com',
'images.yusi123.com',
'upload.wikimedia.org',
'photobucket.com',
'yidu.qiniudn.com',
'tinypic.com',
);
}
/*后面止步*/
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;
protected $filePrependSecurityBlock = "<?php die('Execution denied!'); //";
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();
$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();
}
$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! :)
$imgData = base64_decode("R0lGODlhUAAMAIAAAP8AAP///yH5BAAHAP8ALAAAAABQAAwAAAJpjI+py+0Po5y0OgAMjjv01YUZ\nOGplhWXfNa6JCLnWkXplrcBmW+spbwvaVr/cDyg7IoFC2KbYVC2NQ5MQ4ZNao9Ynzjl9ScNYpneb\nDULB3RP6JuPuaGfuuV4fumf8PuvqFyhYtjdoeFgAADs=");
header('Content-Type: image/gif');
header('Content-Length: ' . strlen($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)){
$mtime = @filemtime($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){
$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;
} 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.");
@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');
if ( ! DISPLAY_ERROR_MESSAGES ) {
return;
}
$html = '<ul>';
foreach($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'], ENT_QUOTES );
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 = $this->cacheDirectory . '/timthumb_cacheLastCleanTime.touch';
if(! is_file($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
$this->debug(1, "Cache was last cleaned more than " . FILE_CACHE_TIME_BETWEEN_CLEANS . " seconds ago. Cleaning now.");
if (!touch($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) $this->param('ct', '1');
if ($new_width == 0 && $new_height == 0) {
$new_width = (int) DEFAULT_WIDTH;
$new_height = (int) DEFAULT_HEIGHT;
}
// ensure size limits can not be abused
$new_width = min ($new_width, MAX_WIDTH);
$new_height = min ($new_height, MAX_HEIGHT);
$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));
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, $canvas_color_B, 0);
}
imagefill ($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, $src_h);
} else {
imagecopyresampled ($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);
}
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($this->cachefile);
rename($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', $src);
if(is_file($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.");
} else if ( ! is_dir( $this->docRoot ) ) {
$this->error("Server path does not exist. Ensure variable \$_SERVER['DOCUMENT_ROOT'] is set correctly");
}
if(file_exists ($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.");
}
}
$absolute = $this->realpath('/' . $src);
if($absolute && file_exists($absolute)){
$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 = $this->docRoot;
if (strstr($_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);
}
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);
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. Mimetype = '" . $mimeType . "'" . $tempfile);
return false;
}
if($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');
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);
imagealphablending( $image, true );
imagesavealpha( $image, true );
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){
$this->set404();
}
if($httpStatus == 302){
$this->error("External Image is Redirecting. Try alternate image url");
return false;
}
if($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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