# File lib/rack/methodoverride.rb, line 25
    def method_override(env)
      req = Request.new(env)
      method = method_override_param(req) ||
        env[HTTP_METHOD_OVERRIDE_HEADER]
      begin
        method.to_s.upcase
      rescue ArgumentError
        env["rack.errors"].puts "Invalid string for method"
      end
    end