Web Crossing
It doesn't.
This is what it looks like:
GET /WebX?98@@Images/nuimages/access.gif HTTP/1.1
Host: foo.com
Connection: keep-alive
User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en-us) AppleWebKit/73 (KHTML, like Gecko) Safari/73
Accept: */*
Accept-Language: en-us, ja;q=0.62, de-de;q=0.93, de;q=0.90, fr-fr;q=0.86, fr;q=0.83, nl-nl;q=0.79, nl;q=0.76, it-it;q=0.72, it;q=0.69, ja-jp;q=0.66, en;q=0.97, es-es;q=0.59, es;q=0.55, da-dk;q=0.52, da;q=0.48, fi-fi;q=0.45, fi;q=0.41, ko-kr;q=0.38, ko;q=0.34, no-no;q=0.31, no;q=0.28, pt-pt;q=0.24, pt;q=0.21, sv-se;q=0.17, sv;q=0.14, zh-cn;q=0.10, zh-tw;q=0.07, zh;q=0.03
Cookie: webxUser=7379736F70@B6A29663D96EBE5367FC3A837752ADF1
HTTP/1.1 200 OK
Server: Web Crossing(r) Unix-v5.0 built 05/12/03
MIME-Version: 1.0
Cache-Control: private
Connection: close
Last-Modified: Mon, 03 Jun 2002 23:26:39 GMT
Content-type: text/html
Content-length: 625
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