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HTTP 304

Overview#

HTTP 304 (Not Modified) is the HTTP Status Code Not Modified is client URL redirection response Result Code indicates that there is no need to retransmit the requested resources.

HTTP 304 is an implicit URL redirection to a Cache hit resource. This happens when the HTTP Request method is safe, like a HTTP GET or a HTTP HEAD HTTP Request, or when the request is conditional and uses a If-None-Match or a If-Modified-Since HTTP Header Field.

The equivalent HTTP 200 OK response would have included the headers Cache-Control, Content-Location, Date, Etag, Expires, and Vary.

More Information#

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