Hi there, sorry new to ktor - wondering if someone...

# ktor

[Gary]

Hi there, sorry new to ktor - wondering if someone could point me in the direction of what is the best practice to validating that a header is present in a request. E.g. something equivalent to Spring

@RequestHeader(value = "X-API-Key", required = true)

[spand]

Pretty sure there is a header function in the routing setup

[dave08]

Maybe a little custom Feature that hooks the requests and returns whatever if the header's not there...

[Gary]

We ended up writing something like this. Feels a bit hacky though 😕

fun Route.requireHeaders(vararg headerNames: String, build: Route.() -> Unit): Route {
    val selector = HttpHeaderExistRouteSelector(headerNames)
    return createChild(selector).apply(build)
}

And then using it in the routes

route("endpoint") {
            requireHeaders("REQUIRED_HEADER", "REQUIRED_HEADER_2") {
                get("available") {
...                    
                }
            }
        }

[dave08]

Not a bad solution 😉. How would you have preferred it to look?