Web server specifically designed for use testing browsers.

Simple HTTP server with a featureset intended to be used in
test scenarios rather than for serving production sites.
Notable features include:

* The ability to serve static files

* Dynamic responses through python scripting with a multi-level
  API designed to provide full control over the exact bytes sent
  and their timing when required, but be easy to use when such
  fine control is not needed.

* APIs to store and access small amounts of inter-request state.