I am trying to test a http proxy, and how it will behave with it receives rogue http responses. I am looking for a webserver, preferably open-sourced, which I can used to send rogue http responses, example, a http response with content-size set to 0 but has content, etc. In past I had used Codenomicon tool, which is a paid one. I am looking for an open-source alternative. Any ideas are welcome.