gistfile1.rb

module WebmachineExample

  # GET /notes/1
  #   returns a 404
  # GET /notes/2
  #   returns a 200
  # POST /notes
  #   with an invalid content type
  #     returns a 415
  #     does not set the location
  #   with a valid type
  #     returns a 201
  #     sets the location
  # PUT /notes/2
  #   returns a 204
  # PUT /notes/2 (invalid content type)
  #   returns a 415
  # POST /notes/1
  #   returns a 405
  # PUT /notes/1
  #   returns a 404
  # DELETE /notes/1
  #   returns a 404
  # DELETE /notes/2
  #   returns a 204

  Application.routes do
    add ["notes"],
      ->(request) { request.method == "POST" },
      Resources::Note
    add ["notes"], Resources::NoteList
    add ["notes", :id], Resources::Note
  end

  module Resources
    class NoteList < Webmachine::Resource
      def allowed_methods
        %w[ HEAD GET ]
      end

      def to_html
        "list"
      end
    end

    class Note < Webmachine::Resource
      def content_types_accepted
        [
          ["application/json", :accept_json]
        ]
      end

      def accept_json
      end

      def allow_missing_post?
        !request.path_info.has_key?(:id)
      end

      def resource_exists?
        if request.path_info.has_key?(:id)
          request.path_info[:id] == "2" || 404
        else
          false
        end
      end

      def allowed_methods
        if request.path_info.has_key?(:id)
          %w[ HEAD GET PUT DELETE ]
        else
          %w[ POST ]
        end
      end

      def post_is_create?
        !request.path_info.has_key?(:id)
      end

      def create_path
        "/notes/1"
      end

      def delete_resource
        true
      end

      def to_html
        "note"
      end
    end
  end
end