mirror of
https://github.com/mosbth/cimage.git
synced 2025-02-21 12:23:02 +01:00
917 lines
21 KiB
Plaintext
917 lines
21 KiB
Plaintext
<?php
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/**
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* Resize and crop images on the fly, store generated images in a cache.
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*
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* @author Mikael Roos mos@dbwebb.se
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* @example http://dbwebb.se/opensource/cimage
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* @link https://github.com/mosbth/cimage
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*
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*/
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$version = "v0.7.0.x (latest)";
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/**
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* Default configuration options, can be overridden in own config-file.
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*
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* @param string $msg to display.
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*
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* @return void
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*/
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function errorPage($msg)
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{
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global $mode;
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header("HTTP/1.0 500 Internal Server Error");
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if ($mode == 'development') {
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die("[img.php] $msg");
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} else {
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error_log("[img.php] $msg");
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die("HTTP/1.0 500 Internal Server Error");
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}
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}
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/**
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* Custom exception handler.
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*/
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set_exception_handler(function ($exception) {
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errorPage("<p><b>img.php: Uncaught exception:</b> <p>" . $exception->getMessage() . "</p><pre>" . $exception->getTraceAsString(), "</pre>");
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});
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/**
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* Get input from query string or return default value if not set.
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*
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* @param mixed $key as string or array of string values to look for in $_GET.
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* @param mixed $default value to return when $key is not set in $_GET.
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*
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* @return mixed value from $_GET or default value.
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*/
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function get($key, $default = null)
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{
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if (is_array($key)) {
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foreach ($key as $val) {
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if (isset($_GET[$val])) {
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return $_GET[$val];
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}
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}
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} elseif (isset($_GET[$key])) {
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return $_GET[$key];
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}
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return $default;
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}
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/**
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* Get input from query string and set to $defined if defined or else $undefined.
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*
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* @param mixed $key as string or array of string values to look for in $_GET.
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* @param mixed $defined value to return when $key is set in $_GET.
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* @param mixed $undefined value to return when $key is not set in $_GET.
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*
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* @return mixed value as $defined or $undefined.
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*/
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function getDefined($key, $defined, $undefined)
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{
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return get($key) === null ? $undefined : $defined;
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}
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/**
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* Get value from config array or default if key is not set in config array.
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*
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* @param string $key the key in the config array.
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* @param mixed $default value to be default if $key is not set in config.
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*
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* @return mixed value as $config[$key] or $default.
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*/
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function getConfig($key, $default)
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{
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global $config;
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return isset($config[$key])
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? $config[$key]
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: $default;
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}
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/**
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* Log when verbose mode, when used without argument it returns the result.
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*
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* @param string $msg to log.
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*
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* @return void or array.
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*/
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function verbose($msg = null)
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{
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global $verbose;
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static $log = array();
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if (!$verbose) {
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return;
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}
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if (is_null($msg)) {
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return $log;
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}
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$log[] = $msg;
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}
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/**
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* Get configuration options from file, if the file exists, else use $config
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* if its defined or create an empty $config.
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*/
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$configFile = __DIR__.'/'.basename(__FILE__, '.php').'_config.php';
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if (is_file($configFile)) {
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$config = require $configFile;
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} else if (!isset($config)) {
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$config = array();
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}
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/**
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* verbose, v - do a verbose dump of what happens
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*/
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$verbose = getDefined(array('verbose', 'v'), true, false);
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verbose("img.php version = $version");
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/**
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* Set mode as strict, production or development.
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* Default is production environment.
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*/
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$mode = getConfig('mode', 'production');
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// Settings for any mode
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set_time_limit(20);
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ini_set('gd.jpeg_ignore_warning', 1);
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if (!extension_loaded('gd')) {
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errorPage("Extension gd is nod loaded.");
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}
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// Specific settings for each mode
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if ($mode == 'strict') {
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error_reporting(0);
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ini_set('display_errors', 0);
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ini_set('log_errors', 1);
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$verbose = false;
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} else if ($mode == 'production') {
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error_reporting(-1);
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ini_set('display_errors', 0);
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ini_set('log_errors', 1);
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$verbose = false;
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} else if ($mode == 'development') {
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error_reporting(-1);
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ini_set('display_errors', 1);
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ini_set('log_errors', 0);
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} else {
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errorPage("Unknown mode: $mode");
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}
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verbose("mode = $mode");
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verbose("error log = " . ini_get('error_log'));
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/**
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* Set default timezone if not set or if its set in the config-file.
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*/
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$defaultTimezone = getConfig('default_timezone', null);
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if ($defaultTimezone) {
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date_default_timezone_set($defaultTimezone);
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} else if (!ini_get('default_timezone')) {
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date_default_timezone_set('UTC');
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}
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/**
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* Check if passwords are configured, used and match.
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* Options decide themself if they require passwords to be used.
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*/
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$pwdConfig = getConfig('password', false);
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$pwdAlways = getConfig('password_always', false);
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$pwd = get(array('password', 'pwd'), null);
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// Check if passwords match, if configured to use passwords
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$passwordMatch = null;
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if ($pwdAlways) {
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$passwordMatch = ($pwdConfig === $pwd);
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if (!$passwordMatch) {
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errorPage("Password required and does not match or exists.");
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}
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} elseif ($pwdConfig && $pwd) {
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$passwordMatch = ($pwdConfig === $pwd);
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}
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verbose("password match = $passwordMatch");
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/**
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* Prevent hotlinking, leeching, of images by controlling who access them
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* from where.
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*
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*/
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$allowHotlinking = getConfig('allow_hotlinking', true);
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$hotlinkingWhitelist = getConfig('hotlinking_whitelist', array());
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$serverName = isset($_SERVER['SERVER_NAME']) ? $_SERVER['SERVER_NAME'] : null;
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$referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : null;
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$refererHost = parse_url($referer, PHP_URL_HOST);
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if (!$allowHotlinking) {
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if ($passwordMatch) {
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; // Always allow when password match
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} else if ($passwordMatch === false) {
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errorPage("Hotlinking/leeching not allowed when password missmatch.");
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} else if (!$referer) {
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errorPage("Hotlinking/leeching not allowed and referer is missing.");
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} else if (strcmp($serverName, $refererHost) == 0) {
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; // Allow when serverName matches refererHost
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} else if (!empty($hotlinkingWhitelist)) {
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$allowedByWhitelist = false;
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foreach ($hotlinkingWhitelist as $val) {
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if (preg_match($val, $refererHost)) {
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$allowedByWhitelist = true;
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}
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}
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if (!$allowedByWhitelist) {
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errorPage("Hotlinking/leeching not allowed by whitelist.");
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}
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} else {
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errorPage("Hotlinking/leeching not allowed.");
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}
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}
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verbose("allow_hotlinking = $allowHotlinking");
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verbose("referer = $referer");
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verbose("referer host = $refererHost");
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/**
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* Get the source files.
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*/
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$autoloader = getConfig('autoloader', false);
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$cimageClass = getConfig('cimage_class', false);
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if ($autoloader) {
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require $autoloader;
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} else if ($cimageClass) {
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require $cimageClass;
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}
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/**
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* Create the class for the image.
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*/
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$img = new CImage();
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$img->setVerbose($verbose);
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/**
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* Allow or disallow remote download of images from other servers.
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* Passwords apply if used.
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*
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*/
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$allowRemote = getConfig('remote_allow', false);
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if ($allowRemote && $passwordMatch !== false) {
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$pattern = getConfig('remote_pattern', null);
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$img->setRemoteDownload($allowRemote, $pattern);
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$whitelist = getConfig('remote_whitelist', null);
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$img->setRemoteHostWhitelist($whitelist);
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}
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/**
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* shortcut, sc - extend arguments with a constant value, defined
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* in config-file.
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*/
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$shortcut = get(array('shortcut', 'sc'), null);
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$shortcutConfig = getConfig('shortcut', array(
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'sepia' => "&f=grayscale&f0=brightness,-10&f1=contrast,-20&f2=colorize,120,60,0,0&sharpen",
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));
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verbose("shortcut = $shortcut");
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if (isset($shortcut)
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&& isset($shortcutConfig[$shortcut])) {
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parse_str($shortcutConfig[$shortcut], $get);
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verbose("shortcut-constant = {$shortcutConfig[$shortcut]}");
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$_GET = array_merge($_GET, $get);
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}
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/**
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* src - the source image file.
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*/
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$srcImage = get('src')
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or errorPage('Must set src-attribute.');
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// Check for valid/invalid characters
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$imagePath = getConfig('image_path', __DIR__ . '/img/');
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$imagePathConstraint = getConfig('image_path_constraint', true);
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$validFilename = getConfig('valid_filename', '#^[a-z0-9A-Z-/_\.:]+$#');
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preg_match($validFilename, $srcImage)
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or errorPage('Filename contains invalid characters.');
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if ($allowRemote && $img->isRemoteSource($srcImage)) {
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// If source is a remote file, ignore local file checks.
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} else if ($imagePathConstraint) {
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// Check that the image is a file below the directory 'image_path'.
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$pathToImage = realpath($imagePath . $srcImage);
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$imageDir = realpath($imagePath);
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is_file($pathToImage)
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or errorPage(
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'Source image is not a valid file, check the filename and that a
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matching file exists on the filesystem.'
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);
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substr_compare($imageDir, $pathToImage, 0, strlen($imageDir)) == 0
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or errorPage(
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'Security constraint: Source image is not below the directory "image_path"
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as specified in the config file img_config.php.'
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);
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}
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verbose("src = $srcImage");
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/**
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* Manage size constants from config file, use constants to replace values
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* for width and height.
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*/
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$sizeConstant = getConfig('size_constant', function () {
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// Set sizes to map constant to value, easier to use with width or height
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$sizes = array(
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'w1' => 613,
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'w2' => 630,
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);
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// Add grid column width, useful for use as predefined size for width (or height).
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$gridColumnWidth = 30;
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$gridGutterWidth = 10;
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$gridColumns = 24;
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for ($i = 1; $i <= $gridColumns; $i++) {
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$sizes['c' . $i] = ($gridColumnWidth + $gridGutterWidth) * $i - $gridGutterWidth;
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}
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return $sizes;
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});
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$sizes = call_user_func($sizeConstant);
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/**
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* width, w - set target width, affecting the resulting image width, height and resize options
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*/
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$newWidth = get(array('width', 'w'));
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$maxWidth = getConfig('max_width', 2000);
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// Check to replace predefined size
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if (isset($sizes[$newWidth])) {
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$newWidth = $sizes[$newWidth];
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}
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// Support width as % of original width
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if ($newWidth[strlen($newWidth)-1] == '%') {
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is_numeric(substr($newWidth, 0, -1))
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or errorPage('Width % not numeric.');
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} else {
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is_null($newWidth)
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or ($newWidth > 10 && $newWidth <= $maxWidth)
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or errorPage('Width out of range.');
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}
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verbose("new width = $newWidth");
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/**
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* height, h - set target height, affecting the resulting image width, height and resize options
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*/
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$newHeight = get(array('height', 'h'));
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$maxHeight = getConfig('max_height', 2000);
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// Check to replace predefined size
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if (isset($sizes[$newHeight])) {
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$newHeight = $sizes[$newHeight];
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}
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// height
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if ($newHeight[strlen($newHeight)-1] == '%') {
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is_numeric(substr($newHeight, 0, -1))
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or errorPage('Height % out of range.');
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} else {
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is_null($newHeight)
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or ($newHeight > 10 && $newHeight <= $maxHeight)
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or errorPage('Hight out of range.');
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}
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verbose("new height = $newHeight");
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/**
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* aspect-ratio, ar - affecting the resulting image width, height and resize options
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*/
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$aspectRatio = get(array('aspect-ratio', 'ar'));
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$aspectRatioConstant = getConfig('aspect_ratio_constant', function () {
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return array(
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'3:1' => 3/1,
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'3:2' => 3/2,
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'4:3' => 4/3,
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'8:5' => 8/5,
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'16:10' => 16/10,
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'16:9' => 16/9,
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'golden' => 1.618,
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);
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});
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// Check to replace predefined aspect ratio
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$aspectRatios = call_user_func($aspectRatioConstant);
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$negateAspectRatio = ($aspectRatio[0] == '!') ? true : false;
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$aspectRatio = $negateAspectRatio ? substr($aspectRatio, 1) : $aspectRatio;
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if (isset($aspectRatios[$aspectRatio])) {
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$aspectRatio = $aspectRatios[$aspectRatio];
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}
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if ($negateAspectRatio) {
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$aspectRatio = 1 / $aspectRatio;
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}
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is_null($aspectRatio)
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or is_numeric($aspectRatio)
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or errorPage('Aspect ratio out of range');
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verbose("aspect ratio = $aspectRatio");
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/**
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* crop-to-fit, cf - affecting the resulting image width, height and resize options
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*/
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$cropToFit = getDefined(array('crop-to-fit', 'cf'), true, false);
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verbose("crop to fit = $cropToFit");
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/**
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* Set default background color from config file.
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*/
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$backgroundColor = getConfig('background_color', null);
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if ($backgroundColor) {
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$img->setDefaultBackgroundColor($backgroundColor);
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verbose("Using default background_color = $backgroundColor");
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}
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/**
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* bgColor - Default background color to use
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*/
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$bgColor = get(array('bgColor', 'bg-color', 'bgc'), null);
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verbose("bgColor = $bgColor");
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/**
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* fill-to-fit, ff - affecting the resulting image width, height and resize options
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*/
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$fillToFit = get(array('fill-to-fit', 'ff'), null);
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verbose("fill-to-fit = $fillToFit");
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if ($fillToFit !== null) {
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if (!empty($fillToFit)) {
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$bgColor = $fillToFit;
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verbose("fillToFit changed bgColor to = $bgColor");
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}
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$fillToFit = true;
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verbose("fill-to-fit (fixed) = $fillToFit");
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}
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/**
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* no-ratio, nr, stretch - affecting the resulting image width, height and resize options
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*/
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$keepRatio = getDefined(array('no-ratio', 'nr', 'stretch'), false, true);
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verbose("keep ratio = $keepRatio");
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/**
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* crop, c - affecting the resulting image width, height and resize options
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*/
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$crop = get(array('crop', 'c'));
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verbose("crop = $crop");
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/**
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* area, a - affecting the resulting image width, height and resize options
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*/
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$area = get(array('area', 'a'));
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verbose("area = $area");
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/**
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* skip-original, so - skip the original image and always process a new image
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*/
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$useOriginal = getDefined(array('skip-original', 'so'), false, true);
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verbose("use original = $useOriginal");
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/**
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* no-cache, nc - skip the cached version and process and create a new version in cache.
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*/
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$useCache = getDefined(array('no-cache', 'nc'), false, true);
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verbose("use cache = $useCache");
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/**
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* quality, q - set level of quality for jpeg images
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*/
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$quality = get(array('quality', 'q'));
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is_null($quality)
|
|
or ($quality > 0 and $quality <= 100)
|
|
or errorPage('Quality out of range');
|
|
|
|
verbose("quality = $quality");
|
|
|
|
|
|
|
|
/**
|
|
* compress, co - what strategy to use when compressing png images
|
|
*/
|
|
$compress = get(array('compress', 'co'));
|
|
|
|
|
|
is_null($compress)
|
|
or ($compress > 0 and $compress <= 9)
|
|
or errorPage('Compress out of range');
|
|
|
|
verbose("compress = $compress");
|
|
|
|
|
|
|
|
/**
|
|
* save-as, sa - what type of image to save
|
|
*/
|
|
$saveAs = get(array('save-as', 'sa'));
|
|
|
|
verbose("save as = $saveAs");
|
|
|
|
|
|
|
|
/**
|
|
* scale, s - Processing option, scale up or down the image prior actual resize
|
|
*/
|
|
$scale = get(array('scale', 's'));
|
|
|
|
is_null($scale)
|
|
or ($scale >= 0 and $scale <= 400)
|
|
or errorPage('Scale out of range');
|
|
|
|
verbose("scale = $scale");
|
|
|
|
|
|
|
|
/**
|
|
* palette, p - Processing option, create a palette version of the image
|
|
*/
|
|
$palette = getDefined(array('palette', 'p'), true, false);
|
|
|
|
verbose("palette = $palette");
|
|
|
|
|
|
|
|
/**
|
|
* sharpen - Processing option, post filter for sharpen effect
|
|
*/
|
|
$sharpen = getDefined('sharpen', true, null);
|
|
|
|
verbose("sharpen = $sharpen");
|
|
|
|
|
|
|
|
/**
|
|
* emboss - Processing option, post filter for emboss effect
|
|
*/
|
|
$emboss = getDefined('emboss', true, null);
|
|
|
|
verbose("emboss = $emboss");
|
|
|
|
|
|
|
|
/**
|
|
* blur - Processing option, post filter for blur effect
|
|
*/
|
|
$blur = getDefined('blur', true, null);
|
|
|
|
verbose("blur = $blur");
|
|
|
|
|
|
|
|
/**
|
|
* rotateBefore - Rotate the image with an angle, before processing
|
|
*/
|
|
$rotateBefore = get(array('rotateBefore', 'rotate-before', 'rb'));
|
|
|
|
is_null($rotateBefore)
|
|
or ($rotateBefore >= -360 and $rotateBefore <= 360)
|
|
or errorPage('RotateBefore out of range');
|
|
|
|
verbose("rotateBefore = $rotateBefore");
|
|
|
|
|
|
|
|
/**
|
|
* rotateAfter - Rotate the image with an angle, before processing
|
|
*/
|
|
$rotateAfter = get(array('rotateAfter', 'rotate-after', 'ra', 'rotate', 'r'));
|
|
|
|
is_null($rotateAfter)
|
|
or ($rotateAfter >= -360 and $rotateAfter <= 360)
|
|
or errorPage('RotateBefore out of range');
|
|
|
|
verbose("rotateAfter = $rotateAfter");
|
|
|
|
|
|
|
|
/**
|
|
* autoRotate - Auto rotate based on EXIF information
|
|
*/
|
|
$autoRotate = getDefined(array('autoRotate', 'auto-rotate', 'aro'), true, false);
|
|
|
|
verbose("autoRotate = $autoRotate");
|
|
|
|
|
|
|
|
/**
|
|
* filter, f, f0-f9 - Processing option, post filter for various effects using imagefilter()
|
|
*/
|
|
$filters = array();
|
|
$filter = get(array('filter', 'f'));
|
|
if ($filter) {
|
|
$filters[] = $filter;
|
|
}
|
|
|
|
for ($i = 0; $i < 10; $i++) {
|
|
$filter = get(array("filter{$i}", "f{$i}"));
|
|
if ($filter) {
|
|
$filters[] = $filter;
|
|
}
|
|
}
|
|
|
|
verbose("filters = " . print_r($filters, 1));
|
|
|
|
|
|
|
|
/**
|
|
* json - output the image as a JSON object with details on the image.
|
|
*/
|
|
$outputFormat = getDefined('json', 'json', null);
|
|
|
|
verbose("json = $outputFormat");
|
|
|
|
|
|
|
|
/**
|
|
* dpr - change to get larger image to easier support larger dpr, such as retina.
|
|
*/
|
|
$dpr = get(array('ppi', 'dpr', 'device-pixel-ratio'), 1);
|
|
|
|
verbose("dpr = $dpr");
|
|
|
|
|
|
|
|
/**
|
|
* convolve - image convolution as in http://php.net/manual/en/function.imageconvolution.php
|
|
*/
|
|
$convolve = get('convolve', null);
|
|
$convolutionConstant = getConfig('convolution_constant', array());
|
|
|
|
// Check if the convolve is matching an existing constant
|
|
if ($convolve && isset($convolutionConstant)) {
|
|
$img->addConvolveExpressions($convolutionConstant);
|
|
verbose("convolve constant = " . print_r($convolutionConstant, 1));
|
|
}
|
|
|
|
verbose("convolve = " . print_r($convolve, 1));
|
|
|
|
|
|
|
|
/**
|
|
* no-upscale, nu - Do not upscale smaller image to larger dimension.
|
|
*/
|
|
$upscale = getDefined(array('no-upscale', 'nu'), false, true);
|
|
|
|
verbose("upscale = $upscale");
|
|
|
|
|
|
|
|
/**
|
|
* Get details for post processing
|
|
*/
|
|
$postProcessing = getConfig('postprocessing', array(
|
|
'png_filter' => false,
|
|
'png_filter_cmd' => '/usr/local/bin/optipng -q',
|
|
|
|
'png_deflate' => false,
|
|
'png_deflate_cmd' => '/usr/local/bin/pngout -q',
|
|
|
|
'jpeg_optimize' => false,
|
|
'jpeg_optimize_cmd' => '/usr/local/bin/jpegtran -copy none -optimize',
|
|
));
|
|
|
|
|
|
|
|
/**
|
|
* alias - Save resulting image to another alias name.
|
|
* Password always apply, must be defined.
|
|
*/
|
|
$alias = get('alias', null);
|
|
$aliasPath = getConfig('alias_path', null);
|
|
$validAliasname = getConfig('valid_aliasname', '#^[a-z0-9A-Z-_]+$#');
|
|
$aliasTarget = null;
|
|
|
|
if ($alias && $aliasPath && $passwordMatch) {
|
|
|
|
$aliasTarget = $aliasPath . $alias;
|
|
$useCache = false;
|
|
|
|
is_writable($aliasPath)
|
|
or errorPage("Directory for alias is not writable.");
|
|
|
|
preg_match($validAliasname, $alias)
|
|
or errorPage('Filename for alias contains invalid characters. Do not add extension.');
|
|
|
|
} else if ($alias) {
|
|
errorPage('Alias is not enabled in the config file or password not matching.');
|
|
}
|
|
|
|
verbose("alias = $alias");
|
|
|
|
|
|
|
|
/**
|
|
* Display image if verbose mode
|
|
*/
|
|
if ($verbose) {
|
|
$query = array();
|
|
parse_str($_SERVER['QUERY_STRING'], $query);
|
|
unset($query['verbose']);
|
|
unset($query['v']);
|
|
unset($query['nocache']);
|
|
unset($query['nc']);
|
|
unset($query['json']);
|
|
$url1 = '?' . htmlentities(urldecode(http_build_query($query)));
|
|
$url2 = '?' . urldecode(http_build_query($query));
|
|
echo <<<EOD
|
|
<a href=$url1><code>$url1</code></a><br>
|
|
<img src='{$url1}' />
|
|
<pre id="json"></pre>
|
|
<script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
|
|
<script type="text/javascript">
|
|
window.getDetails = function (url, id) {
|
|
$.getJSON(url, function(data) {
|
|
element = document.getElementById(id);
|
|
element.innerHTML = "filename: " + data.filename + "\\ncolors: " + data.colors + "\\nsize: " + data.size + "\\nwidth: " + data.width + "\\nheigh: " + data.height + "\\naspect-ratio: " + data.aspectRatio;
|
|
});
|
|
}
|
|
</script>
|
|
<script type="text/javascript">window.getDetails("{$url2}&json", "json")</script>
|
|
EOD;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* Get the cachepath from config.
|
|
*/
|
|
$cachePath = getConfig('cache_path', __DIR__ . '/../cache/');
|
|
|
|
|
|
|
|
/**
|
|
* Load, process and output the image
|
|
*/
|
|
$img->log("Incoming arguments: " . print_r(verbose(), 1))
|
|
->setSaveFolder($cachePath)
|
|
->useCache($useCache)
|
|
->setSource($srcImage, $imagePath)
|
|
->setOptions(
|
|
array(
|
|
// Options for calculate dimensions
|
|
'newWidth' => $newWidth,
|
|
'newHeight' => $newHeight,
|
|
'aspectRatio' => $aspectRatio,
|
|
'keepRatio' => $keepRatio,
|
|
'cropToFit' => $cropToFit,
|
|
'fillToFit' => $fillToFit,
|
|
'crop' => $crop,
|
|
'area' => $area,
|
|
'upscale' => $upscale,
|
|
|
|
// Pre-processing, before resizing is done
|
|
'scale' => $scale,
|
|
'rotateBefore' => $rotateBefore,
|
|
'autoRotate' => $autoRotate,
|
|
|
|
// General processing options
|
|
'bgColor' => $bgColor,
|
|
|
|
// Post-processing, after resizing is done
|
|
'palette' => $palette,
|
|
'filters' => $filters,
|
|
'sharpen' => $sharpen,
|
|
'emboss' => $emboss,
|
|
'blur' => $blur,
|
|
'convolve' => $convolve,
|
|
'rotateAfter' => $rotateAfter,
|
|
|
|
// Output format
|
|
'outputFormat' => $outputFormat,
|
|
'dpr' => $dpr,
|
|
)
|
|
)
|
|
->loadImageDetails()
|
|
->initDimensions()
|
|
->calculateNewWidthAndHeight()
|
|
->setSaveAsExtension($saveAs)
|
|
->setJpegQuality($quality)
|
|
->setPngCompression($compress)
|
|
->useOriginalIfPossible($useOriginal)
|
|
->generateFilename($cachePath)
|
|
->useCacheIfPossible($useCache)
|
|
->load()
|
|
->preResize()
|
|
->resize()
|
|
->postResize()
|
|
->setPostProcessingOptions($postProcessing)
|
|
->save()
|
|
->linkToCacheFile($aliasTarget)
|
|
->output();
|
|
|