HTTP 204 No Content vs 304 Not Modified
HTTP 204 (No Content) is a 2xx Success response, while 304 (Not Modified) is a 3xx Redirection response. 204 indicates that the server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body. In contrast, 304 means that the resource has not been modified since the last request. The client can use its cached copy.
Описание
The server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body.
Когда вы это видите
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
Как исправить
No fix needed. The action was successful; there is simply no content to return.
Описание
The resource has not been modified since the last request. The client can use its cached copy.
Когда вы это видите
When the browser cache is still valid (If-None-Match / If-Modified-Since headers match).
Как исправить
No fix needed. This saves bandwidth by confirming the cached version is still current.
Ключевые различия
204 is a 2xx Success response, while 304 is a 3xx Redirection response.
HTTP 204: The server successfully processed the request but is not returning any content. Common for DELETE operations and form submissions that don't need a response body.
HTTP 304: The resource has not been modified since the last request. The client can use its cached copy.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 304 when when the browser cache is still valid (If-None-Match / If-Modified-Since headers match).
Когда что использовать
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 304 (Not Modified): No fix needed. This saves bandwidth by confirming the cached version is still current.