HTTP 307 Temporary Redirect vs 426 Upgrade Required
HTTP 307 (Temporary Redirect) is a 3xx Redirection response, while 426 (Upgrade Required) is a 4xx Client Error response. 307 indicates that the resource temporarily resides at a different URL. Unlike 302, this guarantees the HTTP method will NOT be changed. 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.
Description
The resource temporarily resides at a different URL. Unlike 302, this guarantees the HTTP method will NOT be changed.
When You See It
When you need a temporary redirect that preserves the request method (POST stays POST).
How to Fix
Follow the Location header using the same HTTP method.
Description
The server refuses to perform the request using the current protocol but might after the client upgrades to a different protocol.
When You See It
When a server requires HTTPS or a newer protocol version.
How to Fix
Switch to the protocol specified in the Upgrade response header.
Key Differences
307 is a 3xx Redirection response, while 426 is a 4xx Client Error response.
HTTP 307: The resource temporarily resides at a different URL. Unlike 302, this guarantees the HTTP method will NOT be changed.
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 307 when when you need a temporary redirect that preserves the request method (POST stays POST).
You encounter 426 when when a server requires HTTPS or a newer protocol version.
When to Use Which
For 307 (Temporary Redirect): Follow the Location header using the same HTTP method. For 426 (Upgrade Required): Switch to the protocol specified in the Upgrade response header.