When browsing static files, iis will set the response header with cache information (Cache-Control, ETag, Last-Modified, etc.) and that works fine. But when I start the gzip compression, the content in response is compressed but cache information in header is lost, which means the client would request the resource again and again.
Did I make something wrong with the configuration? I just use these normal steps:
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Web Site - Properties - "Service" tab - select the check boxes and set the proper path
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Web Service Extensions - Add new - "C:\Windows\System32\inetsrv\gzip.dll"