Ktor Response readText() already received exception

Ktor Version

1.2.0-alpha-2

Ktor Engine Used(client or server and name)

Client OkHttp

JVM Version, Operating System and Relevant Context

JVM 1.8

Feedback

readText() on a response that failed used to work, but doesn’t anymore. readBytes() still works which makes me think that this is an undesirable behaviour.

If it is the desired behaviour, I’d love the rationale behind it as well as the best way to transform the response body into a String.

val client = HttpClient(MockEngine { MockHttpResponse(it.call, HttpStatusCode.BadRequest) })

try {
    client.get<String>("www.google.com")
} catch (exception: ResponseException) {
    // io.ktor.client.call.DoubleReceiveException: Response already received: io.ktor.client.call.HttpClientCall@27ce24aa
    exception.response.readText()
    // This is fine
    String(exception.response.readBytes())
}

Stacktrace

io.ktor.client.call.DoubleReceiveException: Response already received: io.ktor.client.call.HttpClientCall@27ce24aa

	at io.ktor.client.call.HttpClientCall.receive(HttpClientCall.kt:57)
	at io.ktor.client.response.HttpResponseKt.readText(HttpResponse.kt:80)
	at io.ktor.client.response.HttpResponseKt.readText$default(HttpResponse.kt:74)
	at suite.TestSuiteMultiCluster$stuff$1.invokeSuspend(TestSuiteMultiCluster.kt:84)

[e5l]

Fixed since 1.4.3

[mobiletoly]

@minogin I just encountered the same issue, luckily there is a work-around. While response.readText() throws an exception, you should still be able to use response.readBytes() call and convert it to text or deserialize to JSON response.