# File lib/faraday/request/twitter_oauth.rb, line 7
    def call(env)
      params = env[:body] || {}
      signature_params = params

      params.map{ |k,v| signature_params = {} if v.respond_to?(:content_type) }

      header = SimpleOAuth::Header.new(env[:method], env[:url], signature_params, @options)

      env[:request_headers]['Authorization'] = header.to_s

      @app.call(env)
    end