Add session support, which is off by default. Enable by calling set_o…

…ption(:sessions => true).

The TODO-List-Example now works again.

lib/sinatra.rb

@@ -114,7 +114,13 @@ def env
   end
 
   def build_application
-    Rack::CommonLogger.new(application)
+    app = if Sinatra.options[:session] == true
+      Rack::Session::Cookie.new(application)
+    else
+      application
+    end
+
+    Rack::CommonLogger.new(app)
   end
 
   def run
@@ -587,7 +593,7 @@ def initialize(request, response, route_params)
     end
 
     def params
-      @params = @route_params.merge(@request.params)
+      @params = @route_params.merge(@request.params).symbolize_keys
     end
 
     def stop(*args)
@@ -598,6 +604,10 @@ def complete(returned)
       @response.body || returned
     end
 
+    def session
+      @request.env['rack.session']
+    end
+
     private
 
       def method_missing(name, *args, &b)
@@ -620,7 +630,8 @@ def self.default_options
         :env => :development,
         :root => Dir.pwd,
         :views => Dir.pwd + '/views',
-        :public => Dir.pwd + '/public'
+        :public => Dir.pwd + '/public',
+        :sessions => false,
       }
     end