google: https://websiteadvantage.com.au/Request-HTTP-Header-Info

Url	/Request-HTTP-Header-Info
Method	GET
UserHostAddress	101.127.248.181
UserHostName	101.127.248.181
IsSecureConnection	True
IsAuthenticated	False
Connection	keep-alive
Accept	text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding	gzip, deflate, br
Accept-Language	en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7,zh-TW;q=0.6,ja;q=0.5
Cookie	ASP.NET_SessionId=dhjuyz3gwjst5ifeqkuhkfm3
Host	websiteadvantage.com.au
Referer	https://www.google.com/
User-Agent	Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Upgrade-Insecure-Requests	1
X-REWRITE-URL	/Request-HTTP-Header-Info

baidu: https://www.webmasterworld.com/search_engine_spiders/4792455.htm

IP: aa.bb.cc.dd
Accept: */*
Accept-Language: zh-cn,zh-tw
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (compatible; Baiduspider/2.0; +http://www.baidu.com/search/spider.html)
Connection: close
Host: example.com