Debug static file requests from IIS6

How can I debug what is being returned by IIS(6) when the response goes through proxies before getting to the browser?

I have requests for static files which are being sent with the 'Accept-encoding: gzip' header. These are being gzipped correctly. However, if a 'Via: ' header (to redirect the response via a proxy) is also included the content is not received gzipped by the browser.

I want to know if the issue is with IIS not applying the compression or related to something the proxy is doing.

How can I开发者_StackOverflow investigate this problem?

This is related to IIS6 not doing gzip compression when including Via header in request.

In case anyone else hits this problem i believe it's due to the "HcNoCompressionForProxies" option, configurable in the metabase. It specifically lets you disable compression for proxied requests.

http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/05f67ae3-fab6-4822-8465-313d4a3a473e.mspx?mfr=true

If your still interested my answer would be install Fiddler probably on the client first. For HTML snooping you can't do much better.

That would be my first port of call.