| Previous | Next |
| HTTP_STATUS_REDIRECT_METHOD | HTTP_STATUS_USE_PROXY |
HTTP_STATUS_NOT_MODIFIED
A 304 response is returned after a conditional request such as If-None-Match or If-Modified-Since. It has no message body; the client combines its cached representation with the updated response metadata.
It is not an error and should not be rendered as a blank page. When cache behavior is unexpected, compare validators, cache-control directives, and the exact request headers.
A 304 response has no representation body; the client combines its stored response with the allowed metadata from the 304. It is valid only in conditional request processing. If a cache unexpectedly shows stale content, inspect the validators it sent and whether the cached representation actually corresponds to those validators.
Looking for a different code? Search another status or error code.