今天看到Lulu的闪存问到Cookie的问题，然后引发更多问题，突然想到昨晚使用Fiddler调试是否使用gzip压缩时，发现IE7下的localhost无法被捕获了。呵呵，然后就直接搜索了“Fiddler localhost”，找到了原因。
以下引用至：http://www.fiddlertool.com/Fiddler/help/knownissues.asp
I don't see IE7 or .NET traffic sent to localhost or 127.0.0.1.
IE7 and the .NET Framework are hardcoded not to send requests for Localhost through proxies. Fiddler runs as a proxy. The workaround is to use your machine name as the hostname instead of Localhost or 127.0.0.1.
So, for instance, rather than hitting http://localhost:8081/mytestpage.aspx, instead visit http://machinename:8081/mytestpage.aspx. Alternatively, you can use http://localhost.:8081/mytestpage.aspx (note the trailing dot after localhost). Alternatively, you can customize your Rules file like so:
static function OnBeforeRequest(oSession:Fiddler.Session){
if (oSession.host.ToUpper() == "MYAPP") { oSession.host = "127.0.0.1:8081"; }
}
...and then navigate to http://myapp, which will act as an alias for 127.0.0.1:8081.
我比较喜欢localhost. 方式。
如果你使用IIS7的话，还可以自己定制
<system.net>
<defaultProxy>
<proxy proxyaddress="http://127.0.0.1:8888" />
</defaultProxy>
</system.net>
这样，就会通过代理来访问了，从而Fiddler就能捕获到数据了。
最后还联想到以前DF介绍的一款Fiddler的插件，帮助我们查看被去空白的Javascript代码插件-- Fiddler2 - JavaScript Beautifier Plugin （Fiddler 2的JavaScript代码美化插件）。
呵呵，有时候想起某些事情是需要有导火线的。