Monday, July 9, 2007

Controlling How a Page is Cached

A proxy server is used to reduce the amount of time spent retrieving documents over the Internet. It does this by caching, or storing, the document in memory and then serving it from memory the next time a client tries to retrieve the page. This can cause problems with Active Server Pages because of their dynamic nature.
By default, IIS sends web pages with headers that tell proxy servers not to cache their documents. If you need to change this, you can by placing the following line of code at the top of your ASP page:
<% Response.CacheControl="Public" %> This will allow all proxy servers that retrieve the page to save it in their local memory and improve the speed at which it can be retrieved.

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