HTTP 204 No Content vs 426 Upgrade Required
HTTP 204 (No Content) is a 2xx Success response, while 426 (Upgrade Required) 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, 426 means that the server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
Mô tả
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.
Khi bạn thấy mã này
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
Cách khắc phục
No fix needed. The action was successful; there is simply no content to return.
Mô tả
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
Khi bạn thấy mã này
When a server requires HTTPS or a newer protocol version.
Cách khắc phục
Switch to the protocol specified in the Upgrade response header.
Sự khác biệt chính
204 is a 2xx Success response, while 426 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 426: The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
You encounter 204 when after DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
You encounter 426 when when a server requires HTTPS or a newer protocol version.
Khi nào dùng cái nào
For 204 (No Content): No fix needed. The action was successful; there is simply no content to return. For 426 (Upgrade Required): Switch to the protocol specified in the Upgrade response header.