I'm writing an HTTP handler to manage caching of items on browsers and proxy servers.
The idea is to parse the "If-Modified-Since" header in the request and compare it to the last updated datetime of the file. I'll server file or a 302 accordingly.
However, according to this
http://www.webmasterworld.com/microsoft_asp_net/4056961.htm , IIS strips this item from the headers.
The workaround they suggest seems like a good idea but I don't seem to be able to successfully add any headers to the request using IIRF.
Can you help?