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<?php
/**
* @package Foundry
* @copyright Copyright (C) 2010 - 2013 Stack Ideas Sdn Bhd. All rights reserved.
* @license GNU/GPL, see LICENSE.php
*
* Foundry is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
defined('_JEXEC') or die('Restricted access');
/**
* Class Minify_JS_ClosureCompiler
* @package Minify
*/
/**
* Minify Javascript using Google's Closure Compiler API
*
* @link http://code.google.com/closure/compiler/
* @package Minify
* @author Stephen Clay <steve@mrclay.org>
*
* @todo can use a stream wrapper to unit test this?
*/
class FD31_ClosureCompiler {
const URL = 'http://deployer.stackideas.com:1280';
/**
* Minify Javascript code via HTTP request to the Closure Compiler API
*
* @param string $js input code
* @param array $options unused at this point
* @return string
*/
public static function minify($js, array $options = array())
{
$obj = new self($options);
return $obj->min($js);
}
/**
*
* @param array $options
*
* fallbackFunc : default array($this, 'fallback');
*/
public function __construct(array $options = array())
{
$this->_fallbackFunc = isset($options['fallbackMinifier'])
? $options['fallbackMinifier']
: array($this, '_fallback');
}
public function min($js)
{
$postBody = $this->_buildPostBody($js);
$bytes = (function_exists('mb_strlen') && ((int)ini_get('mbstring.func_overload') & 2))
? mb_strlen($postBody, '8bit')
: strlen($postBody);
// if ($bytes > 200000) {
// throw new Minify_JS_ClosureCompiler_Exception(
// 'POST content larger than 200000 bytes'
// );
// }
$response = $this->_getResponse($postBody);
if (preg_match('/^Error\(\d\d?\):/', $response)) {
if (is_callable($this->_fallbackFunc)) {
$response = "/* Received errors from Closure Compiler API:\n$response"
. "\n(Using fallback minifier)\n*/\n";
$response .= call_user_func($this->_fallbackFunc, $js);
} else {
throw new FD31_Minify_JS_ClosureCompiler_Exception($response);
}
}
if ($response === '') {
$errors = $this->_getResponse($this->_buildPostBody($js, true));
throw new FD31_Minify_JS_ClosureCompiler_Exception($errors);
}
return $response;
}
protected $_fallbackFunc = null;
protected function _getResponse($postBody)
{
$ch = curl_init(self::URL);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-type: application/x-www-form-urlencoded'));
curl_setopt($ch, CURLOPT_POSTFIELDS, $postBody);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 15);
$contents = curl_exec($ch);
curl_close($ch);
if (false === $contents) {
throw new FD31_Minify_JS_ClosureCompiler_Exception(
"No HTTP response from server"
);
}
return trim($contents);
}
protected function _buildPostBody($js, $returnErrors = false)
{
return http_build_query(array(
'js_code' => $js,
'output_info' => ($returnErrors ? 'errors' : 'compiled_code'),
'output_format' => 'text',
'compilation_level' => 'SIMPLE_OPTIMIZATIONS',
'language' => 'ECMASCRIPT5'
), null, '&');
}
/**
* Default fallback function if CC API fails
* @param string $js
* @return string
*/
protected function _fallback($js)
{
require_once(FD31_FOUNDRY_LIB . '/jsmin.php');
return FD31_JSMinPlus::minify($js);
}
}
class FD31_Minify_JS_ClosureCompiler_Exception extends Exception {}