HTTP 204 No Content vs 401 Unauthorized
HTTP 204 (No Content) is a 2xx Success response, while 401 (Unauthorized) 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, 401 means that the request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
คำอธิบาย
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.
เมื่อคุณพบเห็น
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
วิธีแก้ไข
No fix needed. The action was successful; there is simply no content to return.
คำอธิบาย
The request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
เมื่อคุณพบเห็น
When accessing a protected resource without credentials or with expired tokens.
วิธีแก้ไข
Include valid authentication credentials (API key, Bearer token, Basic auth) in the Authorization header.
ความแตกต่างหลัก
204 is a 2xx Success response, while 401 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 401: The request requires user authentication. The response includes a WWW-Authenticate header indicating the authentication scheme.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 401 when when accessing a protected resource without credentials or with expired tokens.
ควรใช้อันไหนเมื่อไร
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 401 (Unauthorized): Include valid authentication credentials (API key, Bearer token, Basic auth) in the Authorization header.