$ curl -i http://pypi.python.org/simple/pep8/ # This run gives back gzipped html

gistfile1.txt

HTTP/1.1 200 OK
Server: nginx/1.1.19
Content-Type: text/html; charset=utf-8
Content-encoding: gzip
Strict-Transport-Security: max-age=31536000
Cache-Control: max-age=3600, public
Via: 1.1 varnish
Content-Length: 829
Accept-Ranges: bytes
Date: Wed, 29 May 2013 12:26:04 GMT
Via: 1.1 varnish
Age: 2842
Connection: keep-alive
X-Served-By: cache-s29-SJC2, cache-a16-AMS
X-Cache: MISS, HIT
X-Cache-Hits: 0, 23
X-Timer: S1369827522.488703728,VS0,VS77,VE241,VE2841833