set status, headers and body before hitting after filters. fixes #402.

CHANGES

@@ -12,6 +12,9 @@
    Moreover, it will be ignored if the value is not between 400 and 599. You
    should use Exception#http_status instead. (Konstantin Haase)
 
+ * Status, headers and body will be set correctly in an after filter when using
+   halt in a before filter or route. (Konstantin Haase)
+
 = 1.3.2 / 2011-12-30
 
  * Don't automatically add `Rack::CommonLogger` if `Rack::Server` is adding it,

lib/sinatra/base.rb

@@ -877,15 +877,18 @@ module Sinatra
       elsif res.respond_to? :each
         body res
       end
+      nil # avoid double setting the same response tuple twice
     end
 
     # Dispatch a request with error handling.
     def dispatch!
-      static! if settings.static? && (request.get? || request.head?)
-      filter! :before
-      route!
+      invoke do
+        static! if settings.static? && (request.get? || request.head?)
+        filter! :before
+        route!
+      end
     rescue ::Exception => boom
-      handle_exception!(boom)
+      invoke { handle_exception!(boom) }
     ensure
       filter! :after unless env['sinatra.static_file']
     end

test/routing_test.rb

@@ -531,6 +531,17 @@ class RoutingTest < Test::Unit::TestCase
     assert_equal 'HelloWorldHowAreYou', body
   end
 
+  it 'sets response.status with halt' do
+    status_was = nil
+    mock_app do
+      after { status_was = status }
+      get('/') { halt 500, 'error' }
+    end
+    get '/'
+    assert_status 500
+    assert_equal 500, status_was
+  end
+
   it "transitions to the next matching route on pass" do
     mock_app {
       get '/:foo' do