Ruby Facebook Signed Request

Ruby Facebook Signed Request

    def parse_signed_request
      signed_request = params['signed_request']
      @appdata = ''
      if signed_request.nil? or signed_request.empty?
        
      else
        encoded_sig, encoded_params = signed_request.split('.')
        decoded_sig = UrlSafeBase64.decode64(encoded_sig)
        decoded_params = Yajl::Parser.parse(UrlSafeBase64.decode64(encoded_params))
        @sigr = decoded_params
        @signed_request = decoded_params.to_json
        @app_data = decoded_params['app_data']
      end
    end