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 investigate this problem?
This is related to http://stackoverflow.com/questions/1762808/iis6-not-doing-gzip-compression-when-including-via-header-in-request.