👋 is there any way to change the response headers? Server is not sending

WWW-Authenticate

on 401, so the Auth plugin is not working properly. I have tried with:

client.receivePipeline.intercept(HttpReceivePipeline.Before) { response ->
    if (response.status == HttpStatusCode.Unauthorized && !response.headers.contains(HttpHeaders.WWWAuthenticate)) {
        val headers = buildHeaders {
            appendAll(response.headers)
            append(HttpHeaders.WWWAuthenticate, "Bearer")
        }
        proceedWith(object : HttpResponse() {
            override val headers get() = headers
            // delegate all other properties to original response
        })
    } else {
        proceed()
    }
}

And I can see with the debugger that this is invoked before the header check in Ktor's

Auth

class. But still, the response passed to Auth does not include my header. It seems like the response passed to

proceedWith()

does not replace

call.response

, which is what Auth plugin reads. Any idea?

Unfortunately, there is no way to do it now.

receivePipeline

semantics is broken, because its context is

HttpClientCall

that has reference on response, that you can’t update. We will fix it in 2.0.0. For now, you can only fix your backend or copy-paste

Auth

feature so that it doesn’t need

WWW-Authenticate

header. Sorry =(

@natario1 please follow https://youtrack.jetbrains.com/issue/KTOR-2806

What about OkHttp network interceptor? Would that be invoked before Ktor response is parsed?

Yes, it will.

Great! I'll test this. Thanks for helping 🙏

FYI https://github.com/ktorio/ktor/pull/2522