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Tip of the Day
Expertise: Intermediate
Jan 20, 2000



Application Security Testing: An Integral Part of DevOps

Make Sure That the Browser or Proxy Server Will Not Cache the Page

In general, the Expires property of the Response object can be used to "expire" the Web page. This prevents a browser or proxy server from caching the page. However, a more reliable way to do it involves sending additional headers with the HTML page:
Response.Expires = 0
Response.ExpiresAbsolute = Now () -  
Response.AddHeader "pragma","no-cache"
Response.AddHeader  "cache-control","private"
Response.CacheControl = "no-cache"
These additional headers will make sure that the browser or proxy server does not cache the page. It will also work on more systems than Response.Expires will by itself.
Jai Bardhan
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