Turn sessions on or off

examples/hello/hello.rb

@@ -1,9 +1,13 @@
 $LOAD_PATH.unshift File.dirname(__FILE__) + '/../../lib'
 require 'sinatra'
 
-# get '/' do
-#   "Hello World!"
-# end
+production do
+  sessions :off
+end
+
+get '/' do
+  "Hello World!"
+end
 
 get '/erb.xml' do
   header 'Content-Type' => 'application/xml'
@@ -18,3 +22,9 @@ get '/erb2' do
   erb 'Hello <%= params[:name].capitalize || "World" %> 2!'
 end
 
+# Custom 404
+
+get 404 do
+  'Custom 404!!!!'
+end
+

lib/sinatra/dsl.rb

@@ -36,4 +36,7 @@ module Kernel
     end
   end
   
+  def sessions(on_off)
+    Sinatra::Session::Cookie.use = on_off
+  end
 end

lib/sinatra/server.rb

@@ -10,7 +10,7 @@ module Sinatra
     def start
       begin
         tail_thread = tail(Options.log_file)
-        Rack::Handler::Mongrel.run(Rack::Session::Cookie.new(Dispatcher.new), :Port => Options.port) do |server|
+        Rack::Handler::Mongrel.run(Sinatra::Session::Cookie.new(Dispatcher.new), :Port => Options.port) do |server|
           puts "== Sinatra has taken the stage on port #{server.port}!"
           trap("INT") do
             server.stop

lib/sinatra/sessions.rb

@@ -0,0 +1,21 @@
+module Sinatra
+  module Session
+    class Cookie
+      def self.use=(v)
+        @@use = v unless Sinatra::Server.running  # keep is thread-safe!
+      end
+      
+      def initialize(app, options = {})
+        @app = if (@@use ||= :on) == :off
+          app
+        else
+          Rack::Session::Cookie.new(app)
+        end
+      end
+      
+      def call(env)
+        @app.call(env)
+      end
+    end
+  end
+end