diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..80008b7
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,28 @@
+$: << File.expand_path('../lib', __FILE__)
+require 'rack-emstream'
+
+class Sender
+  def initialize
+    @times = 100
+    @data = "data"
+  end
+
+  def each
+    @times.times { |i|
+      yield @data
+    }
+  end
+
+  def length
+    @times * @data.length
+  end
+end
+
+require 'logger'
+
+use Rack::EMStream
+run lambda { |env|
+  sender = Sender.new
+
+  [ 200, { 'Content-Length' => sender.length.to_s }, sender ]
+}