HttpResponse.readText() fails for non-2xx HTTP status

Ktor Version

1.2.2

Ktor Engine Used(client or server and name)

Apache Client

JVM Version, Operating System and Relevant Context

jdk1.8.0_172, Windows

Feedback

HttpResponse.readText() fails in 1.2.2 (probably since 1.2.0) for requests that return a non-2xx HTTP reponse.

I don’t know whether this is intentional, but since it used to work in 1.1.5 and I haven’t seen any corresponding notice, this might be an unwanted regression.

See the following sample:

import io.ktor.client.HttpClient
import io.ktor.client.engine.apache.Apache
import io.ktor.client.request.get
import io.ktor.client.response.HttpResponse
import io.ktor.client.response.readText
import kotlinx.coroutines.runBlocking

fun main() = runBlocking {
    val client = HttpClient(Apache)
    val response200 = client.get<HttpResponse>("https://httpstat.us/200")
    println(response200.readText())
    // v1.2.2: Prints: "200 OK"
    // v1.1.5: Prints: "200 OK"

    val response400 = client.get<HttpResponse>("https://httpstat.us/400")
    println(response400.readText())
    // v1.2.2: Throws exception: "Exception in thread "main" io.ktor.client.features.ClientRequestException: Client request(https://httpstat.us/400) invalid: 400 Bad Request"
    // v1.1.5: Prints "400 Bad Request"
}

[cy6erGn0m]

This is as designed. See https://ktor.io/clients/http-client/features/response-validation.html

[wkornewald]

Yes, sure: https://youtrack.jetbrains.com/issue/KTOR-1412