304 Not Modified
Explanation:
The 304 Not Modified status code indicates that the client's cached copy is up to date, so the server sends this response to inform the client that the requested resource has not been modified since the last request.
Usage:
Use this status code to inform clients that their cached copy of the resource is up to date and they can continue to use it.
Attentions:
- The server should include information about the last modified time in the response message if possible.
- The response should not include a message body.
Sample:
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