流程当资源第一次被访问的时候，HTTP头部如下
RequestLi
eGETahtmlHTTP11Host127001UserAge
tMozilla50X11ULi
uxi686zhCNrv19015Gecko2009102815Ubu
tu904jau
tyFirefox3015Acceptq08AcceptLa
guageAcceptE
codi
gAcceptCharsetKeepAliveCo
ectio
zhc
zhq05gzipdeflategb2312utf8q07q07300keepalivetexthtmlapplicatio
xhtmlxmlapplicatio
xmlq09
HTTP返回头部如下
StatusLi
eDateServerLastModifiedEtagAcceptRa
gesCo
te
tLe
gthKeepAliveCo
ectio
Co
te
tTypeHTTP11200OKThu26Nov2009135054GMTApache2211U
ixPHP529Thu26Nov2009135019GMT