1 files changed, 133 insertions, 0 deletions
diff --git a/inc/lib/minify/Minify/JS/ClosureCompiler.php b/inc/lib/minify/Minify/JS/ClosureCompiler.php
new file mode 100755
index 00000000..f4ed5bdb
--- /dev/null
+++ b/inc/lib/minify/Minify/JS/ClosureCompiler.php
@@ -0,0 +1,133 @@
+<?php
+/**
+ * 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 Minify_JS_ClosureCompiler {
+    const URL = 'http://closure-compiler.appspot.com/compile';
+
+    /**
+     * 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, $js);
+            } else {
+                throw new Minify_JS_ClosureCompiler_Exception($response);
+            }
+        }
+        if ($response === '') {
+            $errors = $this->_getResponse($this->_buildPostBody($js, true));
+            throw new Minify_JS_ClosureCompiler_Exception($errors);
+        }
+        return $response;
+    }
+    
+    protected $_fallbackFunc = null;
+
+    protected function _getResponse($postBody)
+    {
+        $allowUrlFopen = preg_match('/1|yes|on|true/i', ini_get('allow_url_fopen'));
+        if ($allowUrlFopen) {
+            $contents = file_get_contents(self::URL, false, stream_context_create(array(
+                'http' => array(
+                    'method' => 'POST',
+                    'header' => 'Content-type: application/x-www-form-urlencoded',
+                    'content' => $postBody,
+                    'max_redirects' => 0,
+                    'timeout' => 15,
+                )
+            )));
+        } elseif (defined('CURLOPT_POST')) {
+            $ch = curl_init(self::URL);
+            curl_setopt($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);
+        } else {
+            throw new Minify_JS_ClosureCompiler_Exception(
+               "Could not make HTTP request: allow_url_open is false and cURL not available"
+            );
+        }
+        if (false === $contents) {
+            throw new Minify_JS_ClosureCompiler_Exception(
+               "No HTTP response from server"
+            );
+        }
+        return trim($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'
+        ), null, '&');
+    }
+
+    /**
+     * Default fallback function if CC API fails
+     * @param string $js
+     * @return string
+     */
+    protected function _fallback($js)
+    {
+        require_once 'JSMin.php';
+        return JSMin::minify($js);
+    }
+}
+
+class Minify_JS_ClosureCompiler_Exception extends Exception {}