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.
الوصف
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.
متى تراه
After DELETE requests, PUT updates where no body is needed, or CORS preflight responses.
كيفية الإصلاح
No fix needed. The action was successful; there is simply no content to return.
الوصف
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
متى تراه
When a server requires HTTPS or a newer protocol version.
كيفية الإصلاح
Switch to the protocol specified in the Upgrade response header.
الفروق الرئيسية
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.
متى تستخدم أيًا منهما
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.