Hi. Is there a way for Ktor client to interrupt while downloading the response if it get too large? ...

# ktor

[Ming Chun Or]

Hi. Is there a way for Ktor client to interrupt while downloading the response if it get too large? I have try to take a look at custom plugin and onDwonload hook but it seems didn’t help. The response.bodyAsChannel() seems to be returning the whole response (buffered into memory?) before I can check and consume it. I want to cut the underlying HTTP call early if the response size is too large.

[Ming Chun Or]

The BodyProgress plugin behind onDownload only allow me to put listener on the download content size but did not allow me to cancel the Job

[Aleksei Tirman [JB]]

You can create an instance of HttpRequestBuilder manually to be able to refer to its executionContext property which you can use to cancel a job. Here is an example:

suspend fun main(): Unit = runBlocking {
    val client = HttpClient(Apache)

    val builder = HttpRequestBuilder().apply {
        url("<http://127.0.0.1:3333>")
        onDownload { bytesSentTotal, contentLength ->
            // executionContext.cancel() will work too
            println("Received $bytesSentTotal bytes from $contentLength")
        }
    }

    launch {
        delay(200)
        builder.executionContext.cancel()
    }

    client.get(builder)
}

[Ming Chun Or]

onDownload { bytesSentTotal, contentLength ->
  executionContext.cancel()
}

It work perfectly! Thx ❤️