Is there a hook to for client plugins to capture e...

# ktor

[Austin]

Is there a hook to for client plugins to capture exceptions such as UnknownHost or SocketReadTimeout for monitoring purposes? I dont see any method in the Tracer plugin nor any hook on the Monitoring events

[Olivier Patry]

Didn't try, but would it work with HttpCallValidator? https://ktor.io/docs/client-response-validation.html

[Olivier Patry]

I just tried, with expectSuccess=true & a custom validator, I get java.nio.channels.UnresolvedAddressException, when no Internet connection.

[Olivier Patry]

Same thing without expectSuccess=true

[Austin]

I already have a HttpCallValidator, not sure how the ordering works when 2+ plugins use the same phase in the pipeline. is that documented anywhere / is there a way to log the order of the phases?

[Aleksei Tirman [JB]]

You can intercept the Monitoring phase of the HttpSendPipeline and use proceed to catch any exceptions thrown during the call. Here is an example:

val client = HttpClient(CIO) {}

client.sendPipeline.intercept(HttpSendPipeline.Monitoring) {
    try {
        proceed()
    } catch (t: UnresolvedAddressException) {
        println("Caught exception: $t")
        throw t
    }
}

client.get("<http://nonexistent1234.com>")