It implements a lot of HTTP/1.1, but see http://www.tornadoweb.org/documentation#caveats-and-support http://www.tornadoweb.org/documentation#caveats-and-support

It implements a lot of HTTP/1.1, but see http://www.tornadoweb.org/documentation#caveats-and-support http://www.tornadoweb.org/documentation#caveats-and-support. In practice, we run behind an nginx reverse proxy, so we assume there are missing areas. We recommend people run in a similar fashion in production. We did not optimize for protocol completeness given our production setup.