automime is a middleware that sets the content-encoding and content-type metadata entry automatically by checking the object name suffix on PUT requests. It is disabled by default and can be enabled on a per-container basis.

1. Install automime:

   git clone git://github.com/cschwede/swift-automime.git cd swift-automime sudo python setup.py install

2. Add a filter entry for automime to your proxy-server.conf:

   [filter:automime] use = egg:swift_automime#automime

3. Alter your proxy-server.conf pipeline and add automime after any authentication middleware:

   [pipeline:main] pipeline = catch_errors healthcheck cache tempauth formpost tempurl automime proxy-server

4. Restart your proxy server:

   swift-init proxy reload

5. Enable this for a given container:

   swift post container -m "automime: true"

Done!