How to remove Cache-Control: no-cache from response header?

[Mariatta]

I'm having trouble serving an appengine blobstore over HTTPS, specifically with IE 8 & IE 7 browsers, as the browser just does not like to serve downloadable contents over https.

According to a couple microsoft articles, it's because of the Cache-Control: no-cache header.

http://blogs.msdn.com/b/ieinternals/archive/2009/10/02/internet-explorer-cannot-download-over-https-when-no-cache.aspx

http://support.microsoft.com/kb/316431

The solution proposed in those articles is to remove the Cache-Control: no-cache header from the response.

However, it seems that webapp2 automatically adds this header even after I tried setting it to something else.

According to the source code, it seems to be added to every response 

http://code.google.com/p/webapp-improved/source/browse/webapp2.py#362

Is there a way to override this behavior?

This is what I tried to do when building my response, but still the 'Cache-Control: no-cache' would still be there once the response is rendered.

self.response.headers['Pragma'] = 'cache-control' self.response.headers['Cache-Control'] = 'private' self.response.cache_control.no_cache = None self.response.cache_control.public = False self.response.cache_control.max_age = 1