Add lookup for http reason phrase for standard http codes.

The logic now uses the passed reason phrase if there is one, if not it
then attempts to lookup a reason phrase based on the http code, if that
fails it then uses the error message.

src/frapi/library/Frapi/Error.php

@@ -244,11 +244,22 @@ private static function _get($error_name, $error_msg = false, $http_code = false
 
             if ($http_phrase !== false) {
                 $error['http_phrase'] = $http_phrase;
+            } else if (isset(Frapi_Response::$http_reason[$error['http_code']])){
+                $error['http_phrase'] = Frapi_Response::$http_reason[$error['http_code']];
+            } else if ($error['message'] !== false) {
+                $error['http_phrase'] = $error['message'];
             }
-
             return $error;
         }
 
+        if ($http_phrase === false) {
+            if (isset(Frapi_Response::$http_reason[$http_code])) {
+                $http_phrase = Frapi_Response::$http_reason[$http_code];
+            } else if ($error_msg !== false) {
+                $http_phrase = $error_msg;
+            }
+        }
+
         return array(
             'name'        => $error_name,
             'message'     => $error_msg !== false ? $error_msg : $error_name,

src/frapi/library/Frapi/Response.php

@@ -50,6 +50,59 @@ class Frapi_Response
      */
     protected $data = array();
 
+    /**
+     * Mapping of http code to reason phrases
+     *
+     * Standard http codes to standard reason phrase mapping
+     *
+     * @var array
+     */
+    public static $http_reason = array (
+        100 => 'Continue',
+        101 => 'Switching Protocols',
+        103 => 'Checkpoint',
+        200 => 'OK',
+        201 => 'Created',
+        202 => 'Accepted',
+        203 => 'Non-Authoritative Information',
+        204 => 'No Content',
+        205 => 'Reset Content',
+        206 => 'Partial Content',
+        300 => 'Multiple Choices',
+        301 => 'Moved Permanently',
+        302 => 'Found',
+        303 => 'See Other',
+        304 => 'Not Modified',
+        306 => 'Switch Proxy',
+        307 => 'Temporary Redirect',
+        308 => 'Resume Incomplete',
+        400 => 'Bad Request',
+        401 => 'Unauthorized',
+        402 => 'Payment Required',
+        403 => 'Forbidden',
+        404 => 'Not Found',
+        405 => 'Method Not Allowed',
+        406 => 'Not Acceptable',
+        407 => 'Proxy Authentication Required',
+        408 => 'Request Timeout',
+        409 => 'Conflict',
+        410 => 'Gone',
+        411 => 'Length Required',
+        412 => 'Precondition Failed',
+        413 => 'Request Entity Too Large',
+        414 => 'Request-URI Too Long',
+        415 => 'Unsupported Media Type',
+        416 => 'Requested Range Not Satisfiable',
+        417 => 'Expectation Failed',
+        500 => 'Internal Server Error',
+        501 => 'Not Implemented',
+        502 => 'Bad Gateway',
+        503 => 'Service Unavailable',
+        504 => 'Gateway Timeout',
+        505 => 'HTTP Version Not Supported',
+        511 => 'Network Authentication Required',
+    );
+
     /**
      * The constructor
      *
@@ -78,6 +131,8 @@ public function __construct(array $response)
 
         if (isset($response['reason_phrase'])) {
             $this->http_phrase = $response['reason_phrase'];
+        } else if (isset(self::$http_reason[$this->http_code])){
+            $this->http_phrase = self::$http_reason[$this->http_code];
         }
 
         if (isset($response['data'])) {