App Engine - How to set "Vary: Accept-Encoding" header for static files

Question

Google Page Speed says.

The following publicly cacheable, compressible resources should have a "Vary: Accept-Encoding" header:

for my css and js files.

How can I set google app engine to do this?

Answer 1

From the docs, just add the http_headers for the handlers you need in app.yaml (for Python):

- url: /static
  static_dir: static
  http_headers:
    Vary: Accept-Encoding

Answer 2

Google App Engine tries to serve compressed content when it can. So you shouldn't have to do anything as long as the client follows the guidelines at the link.