How can I make the header guard case insensitive?

[ghost]

I have a route with a header guard like this. It works but it is case sensitive - headers should not be case sensitive. Can anyone suggest to me please how I make this case insensitive? thanks!

                .route(
                    web::post()
                        .guard(guard::Header("content-type", "application/json"))
                        .to(upload_to_hashmap_json),
                )

[CrayonChimp]

It's weird because usually http header is not case sensitive.

The test also confirms my assumption.
Anyway, maybe guard::fn_guard is what you need

.guard(guard::fn_guard(|head| {
    //do some transfer
    bool
}))

[robjtede]

headers should not be case sensitive

Specifically header names are case insensitive. If you're seeing the name being handled in a case sensitive way, please open a bug report.

If you want case insensitive header value guards, that's a feature request or use the fn_guard method suggested by @bellemere.