HTTP 101 Switching Protocols vs 308 Permanent Redirect
HTTP 101 (Switching Protocols) is a 1xx Informational response, while 308 (Permanent Redirect) is a 3xx Redirection response. 101 indicates that the server understands the Upgrade header field request and indicates which protocol it is switching to. In contrast, 308 means that the resource has been permanently moved. Like 301, but guarantees the HTTP method will NOT be changed.
Mô tả
The server understands the Upgrade header field request and indicates which protocol it is switching to.
Khi bạn thấy mã này
When upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
Cách khắc phục
This is normal behavior during protocol upgrades. Ensure your client supports the target protocol.
Mô tả
The resource has been permanently moved. Like 301, but guarantees the HTTP method will NOT be changed.
Khi bạn thấy mã này
For permanent URL changes where POST requests must remain POST.
Cách khắc phục
Update all references to the new URL. The HTTP method is preserved.
Sự khác biệt chính
101 is a 1xx Informational response, while 308 is a 3xx Redirection response.
HTTP 101: The server understands the Upgrade header field request and indicates which protocol it is switching to.
HTTP 308: The resource has been permanently moved. Like 301, but guarantees the HTTP method will NOT be changed.
You encounter 101 when when upgrading from HTTP/1.1 to WebSocket, or to HTTP/2.
You encounter 308 when for permanent URL changes where POST requests must remain POST.
Khi nào dùng cái nào
For 101 (Switching Protocols): This is normal behavior during protocol upgrades. Ensure your client supports the target protocol. For 308 (Permanent Redirect): Update all references to the new URL. The HTTP method is preserved.