获取请求消息中所有头字段(王骞)
host : 60.205.138.245:8080
connection : keep-alive
upgrade-insecure-requests : 1
user-agent : Mozilla/5.0 (Windows NT 10.0;Win64的;x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36 Edg/124.0.0.0
accept : text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
referer : http://8.140.200.250:8080/ch04_hdw/
accept-encoding : gzip, deflate accept-language
: zh-CN,zh;q=0.9,en;q=0.8,en-GB;q=0.7,en-US;q=0.6
cookie:JSESSIONID=F0B5E17D281CDBEC4500358BA34EFDA3