# File lib/rack/rack-restful_submit.rb, line 11
    def call(env)
      if env["REQUEST_METHOD"] == "POST"
        req = Request.new(env)

        if req.params[REWRITE_KEYWORD] && req.params[REWRITE_MAP]
          action = req.params[REWRITE_KEYWORD].keys.first # Should be always just one.
          mapping = req.params[REWRITE_MAP][action]

          if mapping && mapping['url'] && mapping['method']
            rewrite(env, mapping['url'], mapping['method'])
          else
            return super(env)
          end
        else
          return super(env)
        end
      end

      @app.call(env)
    end