added proxy as request options

src/Api.php

@@ -36,6 +36,14 @@ public function setHeader($header, $value)
         Request::addHeader($header, $value);
     }
 
+    /*
+     *  Set Options
+     */
+    public function addRequestOptions($key, $value)
+    {
+        Request::addRequestOptions($key, $value);
+    }
+
     public function setAppDetails($title, $version = null)
     {
         $app = array(

src/Request.php

@@ -29,6 +29,14 @@ class Request
         'Razorpay-API'  =>  1
     );
 
+    /**
+     * Headers to be sent with every http request to the API
+     * @var array
+     */
+    protected static $options = array(
+        'timeout' => 60,
+    );
+
     /**
      * Fires a request to the API
      * @param  string   $method HTTP Verb
@@ -45,11 +53,10 @@ public function request($method, $url, $data = array())
 
         $hooks->register('curl.before_send', array($this, 'setCurlSslOpts'));
 
-        $options = array(
+        $options = array_merge(self::$options,array(
             'auth' => array(Api::getKey(), Api::getSecret()),
             'hook' => $hooks,
-            'timeout' => 60,
-        );
+        ));
 
         $headers = $this->getRequestHeaders();
 
@@ -60,6 +67,26 @@ public function request($method, $url, $data = array())
         return json_decode($response->body, true);
     }
 
+    /**
+     * Adds an additional header to all API requests
+     * @param string $key   Header key
+     * @param string|array $value Header value
+     * @return null
+     */
+    public static function addRequestOptions($key, $value)
+    {
+        self::$options[$key] = $value;
+    }
+
+    /**
+     * Returns all options attached so far
+     * @return array options
+     */
+    protected function getRequestOptions()
+    {
+        return self::$options;
+    }
+
     public function setCurlSslOpts($curl)
     {
         curl_setopt($curl, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_1);