# File lib/twitter/request/oauth.rb, line 8
      def call(env)
        params = env[:body] || {}
        signature_params = params
        params.each do |key, value|
          signature_params = {} if value.respond_to?(:content_type)
        end
        header = SimpleOAuth::Header.new(env[:method], env[:url], signature_params, @options)
        env[:request_headers]['Authorization'] = header.to_s

        @app.call(env)
      end