>> headers
[('Date', 'Mon, 26 Mar 2007 17:38:50 GMT'), ('Server', 'squid/2.5.STABLE14'), ('Mime-Version', '1.0'), ('Content-Type', 'text/html'), ('Content-Length', '1126'), ('Expires', 'Mon, 26 Mar 2007 17:38:50 GMT'), ('X-Squid-Error', 'ERR_CONNECT_FAIL 111'), ('X-Cache', 'MISS from theman.openplans.org'), ('X-Cache-Lookup', 'MISS from theman.openplans.org:81'), ('Connection', 'close')]