Use self defined http status codes?

[blackhorse]

Hello, so http status codes are

1xx, 2xx, 3xx, 4xx, 5xx.

Could we self define http status codes such as 9xx for our own usage?

I didn't see too many people use self defined http status codes. I prefer not to use self defined http status codes. But I have no authentic reasons against it.

Here is one which use self defined http status codes.

http://s23.org/wiki/http_status_codes

The advantage for that is we only need to check the header response and no need to check the body. But there must be some good reasons that not so many people are using this approach.

Any good reasons not using this approach?

Thanks!

[bradgrafelman]

Can you think of an actual example where you'd need a custom HTTP status code?

EDIT: The page you linked to simply shows the standard HTTP response codes.

[blackhorse]

http://s23.org/wiki/http_status_codes

Here is an example, that someone is using the self defined response code. (at the bottom, they listed self defined 9XX codes. I don't see good reasons to use it but I need good reasons to not use it to convince my team.

Any helps would be appreciated.

Thanks!

[bradgrafelman]

Read my post above:

bradgrafelman wrote:

EDIT: The page you linked to simply shows the standard HTTP response codes.

EDIT: Oh, I didn't notice the 9xx ones before. They're non-standard, I don't see any practical use for them.

EDIT2: Also, since they're non-standard, I can think of plenty of reasons why not to use them.