Http Codes

HttpCodes.ml


Project maintained by Aljandor.ovh

426 Upgrade Required

The server refuses to perform the request using the current protocol but might be willing to do so after the client upgrades to a different protocol.

The server MUST send an Upgrade header field in a 426 response to indicate the required protocol(s)1

Example:

``` HTTP/1.1 426 Upgrade Required Upgrade: HTTP/3.0 Connection: Upgrade Content-Length: 53 Content-Type: text/plain

This service requires use of the HTTP/3.0 protocol. ```


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