Google App Engine Adding Cache-control And Other Headers

I have a Flask application on Google App Engine and I want to tell browsers to cache a response that uses the Cache-Control header. It works as expected on dev_appserver.py but whe

Solution 1:

These headers are additional headers that are added because you are looking at the site as a logged in admin user. They will not be present for "normal" users.

This blog post talks about the X-AppEngine-Resource-Usage header specifically: http://googleappengine.blogspot.co.uk/2009/08/new-features-in-124.html

And as they note:

You can view these headers using plugins such as Firefox's Live HTTP Headers or Firebug. Note that only logged in administrators see these figures - ordinary users, and users who aren't logged in, won't see them at all.