HTTP 200 OK vs 426 Upgrade Required
HTTP 200 (OK) is a 2xx Success response, while 426 (Upgrade Required) is a 4xx Client Error response. 200 indicates that the request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only. 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.
คำอธิบาย
The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
เมื่อคุณพบเห็น
The most common HTTP response — indicates the request was processed successfully.
วิธีแก้ไข
No fix needed. The request succeeded as expected.
คำอธิบาย
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
เมื่อคุณพบเห็น
When a server requires HTTPS or a newer protocol version.
วิธีแก้ไข
Switch to the protocol specified in the Upgrade response header.
ความแตกต่างหลัก
200 is a 2xx Success response, while 426 is a 4xx Client Error response.
HTTP 200: The request succeeded. The meaning depends on the HTTP method: GET returns the resource, POST reports the action result, HEAD returns headers only.
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 200 when the most common HTTP response — indicates the request was processed successfully.
You encounter 426 when when a server requires HTTPS or a newer protocol version.
ควรใช้อันไหนเมื่อไร
For 200 (OK): No fix needed. The request succeeded as expected. For 426 (Upgrade Required): Switch to the protocol specified in the Upgrade response header.