有哪位高手知道ieHTTPHeaders的实现原理么?请教有什么办法可以做到和它一样的功能

有谁知道ieHTTPHeaders的实现原理么?请问有什么办法可以做到和它一样的功能?
它是怎么截获类似下面这些信息的阿?
GET   http:   //www.google.com/gen_204?nxpt=9   HTTP/1.0
Accept:   */*
If-Modified-Since:   Wed,   6   Jun   2007   08:50:34   UTC
Cache-Control:   no-cache,no-store
Referer:   http://www.google.com/
Accept-Language:   zh-cn
Proxy-Connection:   Keep-Alive
User-Agent:   Mozilla/4.0   (compatible;   MSIE   6.0;   Windows   NT   5.0)
Host:   www.google.com
Cookie:   PREF=ID=fffb82d7325c1134:NW=1:TM=1181034043:LM=1181034043:S=PTqS3o6QV-Ar3PMg

HTTP/1.1   204   No   Content
Via:   1.0   BBKAV-E
Connection:   Keep-Alive
Proxy-Connection:   Keep-Alive
Content-Length:   0
Date:   Wed,   06   Jun   2007   08:43:11   GMT
Content-Type:   text/html
Server:   GWS/2.1


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