gistfile1.txt

    // copies the HTTP request body from php://input
    private static $request_body_stream;

    // reads the HTTP request body
    // TODO: the body may be too large !!!
    private function parseRequestBody($mediaType)
    {

        if (!isset(self::$request_body_stream)) {
            $src  = fopen("php://input", "rb");
            self::$request_body_stream = tmpfile();
            stream_copy_to_stream($src, self::$request_body_stream);
        }

        rewind(self::$request_body_stream);

        $input = stream_get_contents(self::$request_body_stream);

        if (isset(self::$mediaTypes[$mediaType])) {
            $result = call_user_func(array(__CLASS__, self::$mediaTypes[$mediaType]), $input);
            if ($result) {
                return $result;
            }
        }
        return $input;
    }