HTTP 201 Created vs 304 Not Modified
HTTP 201 (Created) is a 2xx Success response, while 304 (Not Modified) is a 3xx Redirection response. 201 indicates that the request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity. In contrast, 304 means that the resource has not been modified since the last request. The client can use its cached copy.
Descripción
The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
Cuándo lo verás
After successfully creating a new user, post, order, or other resource via a REST API.
Cómo solucionarlo
No fix needed. Check the Location header for the URL of the new resource.
Descripción
The resource has not been modified since the last request. The client can use its cached copy.
Cuándo lo verás
When the browser cache is still valid (If-None-Match / If-Modified-Since headers match).
Cómo solucionarlo
No fix needed. This saves bandwidth by confirming the cached version is still current.
Diferencias clave
201 is a 2xx Success response, while 304 is a 3xx Redirection response.
HTTP 201: The request succeeded and a new resource was created. Typically returned after POST or PUT requests that create a new entity.
HTTP 304: The resource has not been modified since the last request. The client can use its cached copy.
You encounter 201 when after successfully creating a new user, post, order, or other resource via a REST API.
You encounter 304 when when the browser cache is still valid (If-None-Match / If-Modified-Since headers match).
Cuándo usar cada uno
For 201 (Created): No fix needed. Check the Location header for the URL of the new resource. For 304 (Not Modified): No fix needed. This saves bandwidth by confirming the cached version is still current.