Best way to disable client caching

Question

I\'m using a simple servlet filter that forces the browser to skip caching for some server resources:

    Cache-Control: private
    Pragma: 

This work

Answer 1

Your initial solution did not work reliably because:

• Cache control is used to specify directives that MUST be obeyed by all caching mechanisms along the request/response chain. The only mechanisms that I know of are proxies, so user agents are not bound by it.
• The Pragma: header does not include a value. I'm not sure it's even legal - in terms of the HTTP protocol.