Installation Error Codes in IIS 6.0

Question

I want the IIS server to return HTTP 304 (Not Modified) when accessing a specific file.

How can I customize this?

Answer 1

Select the Enable Resource Expiration check box on the HTTP Headers tab in IIS Manager:

IIS 6.0 F1: Website Properties - HTTP Headers Tab

Answer 2

AFAIK, this is impossible to do (in IIS). For this code, several criteria must be met:

• The client must have a cached copy of the page.
• If-Modified-Since Request The header of the HTTP header / date should match what is on the server.

If both conditions are true, the server will return an HTTP status code of 304.