HTTP 204 No Content vs 422 Unprocessable Content
HTTP 204 (No Content) is a 2xx Success response, while 422 (Unprocessable Content) is a 4xx Client Error 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, 422 means that the server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Description
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.
Quand vous le voyez
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
Comment résoudre
No fix needed. The action was successful; there is simply no content to return.
Description
The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
Quand vous le voyez
When form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Comment résoudre
Check the response body for specific validation errors and correct the input data.
Différences clés
204 is a 2xx Success response, while 422 is a 4xx Client Error 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 422: The server understands the content type and syntax, but was unable to process the contained instructions. Common in API validation errors.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 422 when when form validation fails — correct syntax but invalid data (e.g., email format wrong, date in the past).
Quand utiliser lequel
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 422 (Unprocessable Content): Check the response body for specific validation errors and correct the input data.