curl -x localhost:3128 --silent -o /dev/null --dump-header /dev/stdout http://stackoverflow.com HTTP/1.1 200 OK Cache-Control: public, max-age=18 Content-Type: text/html; charset=utf-8 Expires: Tue, 08 Apr 2014 02:00:38 GMT Last-Modified: Tue, 08 Apr 2014 01:59:38 GMT Vary: * X-Frame-Options: SAMEORIGIN Date: Tue, 08 Apr 2014 02:00:18 GMT Content-Length: 212147 X-Cache: MISS from sylviosuse11 X-Cache-Lookup: MISS from sylviosuse11:3128 Via: 1.1 sylviosuse11 (squid/3.4.4) Connection: keep-alive -- Att, Sylvio César,
