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Modifying Response Headers Using ISAPI Filters

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Response headers are appended to the beginning of a server response and contain information about the response itself, whether the response is a Web page or an error. Response headers are used by the client browser, but header data is not displayed. Response header data and page content together are called the response body.

An ISAPI filter can be used to add a header to the response before IIS sends the response body to the client.

For more information about response headers and how to format them, see the Hypertext Transfer Protocol -- HTTP/1.1 specification at the World Wide Web Consortium Web site, section 14.9, for complete descriptions.