ajax

Camping.goes :Ajax
module Ajax::Controllers
  class Index < R '/'
    def get
      render :index
    end
  end

  class Add < R '/add'
      def get
        @todo = @input.todo
        render :_add
      end
  end

  class Resource < R '/resources/(.+)'
    def get resource
      types = {
                '.css' => 'text/css', '.js' => 'text/javascript',
                '.jpg' => 'image/jpeg', '.jpeg' => 'image/jpeg',
                '.gif' => 'image/gif', '.png' => 'image/png'
              }
      full_path = File.expand_path(File.dirname(FILE)) +
                        "/resources/#{resource}"
      if resource.include? ".." # prevent directory traversal attacks
        @status = "403"
        "403 - Forbidden"
      elsif not File.exists?(full_path)
        @status = "404"
        "404 - File not found"
      else
        @headers['Content-Type'] = types[resource[/&#46;\w+$/]]||"text/plain"
        @headers['X-Sendfile'] = full_path
      end
    end
  end
end

module Ajax::Views
  #Camping::Mab.set(:indent, 2)
  def layout
    html do
      head do
        title 'Taking AJAX Camping'
        script :src => R(Resource, 'jquery.js'), :type => 'text/javascript'
      end
      body { self << yield }
    end
  end
  def index
    script :type => 'text/javascript' do "
      $(document).ready(function() {
        $('#todo').focus();
        $('#add').submit(function() {
          var value = $('#todo').val();
          $('#todo').val(''); // reset input box
          if (value) { // don't add empty todos
            $.ajax({
              type: 'GET',
              url: '/add',
              data: 'todo=' + value,
              success: function(msg){
                // Add the todo to the top of the list
                $('#todos').prepend('<li>' + msg + '</li>');
              }
            });
          }
          // focus the input field when the document loads
          $('#todo').focus();
          return false;
        });
      });"
    end
    h1 'Taking AJAX Camping'
    form.add! do
      legend "Another todo list that doesn't work"
      input.todo! :type => 'text', :name => 'todo'
    end
    ul.todos! ""
  end
  def _add
    text "#{@todo}: #{Time.now.to_s}"
  end
end