websocket - Ktor CIO wss套接字立即关闭

使用ktor CIO ws时，可以按预期工作，但是使用wss时，它将立即关闭。任何帮助是极大的赞赏。现在被困了一天。

这是我为wss获得的堆栈跟踪

kotlinx.coroutines.experimental.channels.ClosedReceiveChannelException: Channel was closed
    at kotlinx.coroutines.experimental.channels.Closed.getReceiveException(AbstractChannel.kt:1067)
    at kotlinx.coroutines.experimental.channels.AbstractChannel$ReceiveElement.resumeReceiveClosed(AbstractChannel.kt:907)
    at kotlinx.coroutines.experimental.channels.AbstractSendChannel.helpClose(AbstractChannel.kt:317)
    at kotlinx.coroutines.experimental.channels.AbstractSendChannel.close(AbstractChannel.kt:254)
    at kotlinx.coroutines.experimental.channels.ChannelCoroutine.close(ChannelCoroutine.kt)
    at kotlinx.coroutines.experimental.channels.SendChannel$DefaultImpls.close$default(Channel.kt:84)
    at io.ktor.network.tls.TLSClientHandshake$input$1.doResume(TLSClientHandshake.kt:96)
    at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resumeWithException(CoroutineImpl.kt:48)
    at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resumeWithException(CoroutineImpl.kt:47)
    at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume(CoroutineImpl.kt:41)
    at kotlinx.coroutines.experimental.DispatchedTask$DefaultImpls.run(Dispatched.kt:149)
    at kotlinx.coroutines.experimental.io.internal.MutableDelegateContinuation.run(MutableDelegateContinuation.kt:14)
    at io.ktor.network.util.IOCoroutineDispatcher$IODispatchedTask.run(IOCoroutineDispatcher.kt)
    at io.ktor.network.util.IOCoroutineDispatcher$IOThread$run$1.doResume(IOCoroutineDispatcher.kt:73)
    at kotlin.coroutines.experimental.jvm.internal.CoroutineImpl.resume(CoroutineImpl.kt:42)
    at kotlinx.coroutines.experimental.DispatchedTask$DefaultImpls.run(Dispatched.kt:149)
    at kotlinx.coroutines.experimental.DispatchedContinuation.run(Dispatched.kt:13)
    at kotlinx.coroutines.experimental.EventLoopBase.processNextEvent(EventLoop.kt:140)
    at kotlinx.coroutines.experimental.BlockingCoroutine.joinBlocking(Builders.kt:70)
    at kotlinx.coroutines.experimental.BuildersKt__BuildersKt.runBlocking(Builders.kt:46)
    at kotlinx.coroutines.experimental.BuildersKt.runBlocking(Unknown Source)
    at io.ktor.network.util.IOCoroutineDispatcher$IOThread.run(IOCoroutineDispatcher.kt:68)

这是代码:

httpClient.ws(host = "echo.websocket.org") {
  send(Frame.Text("Hello World"))

  for (message in incoming.map { it as? Frame.Text }.filterNotNull()) {
    println(message.readText())
  }
}

httpClient.wss(host = "echo.websocket.org") {
  send(Frame.Text("Hello World"))

  for (message in incoming.map { it as? Frame.Text }.filterNotNull()) {
    println(message.readText())
  }
}

最佳答案

我在使用安全WebSocket时遇到问题，已在ktor 1.3.2中修复了该问题。

我还想提到echo.websocket.org不会关闭连接，因此for循环将永远暂停(期待下一个pong消息)。

为避免这种情况，您可以重写

for (message in incoming.map { it as? Frame.Text }.filterNotNull()) {
    println(message.readText())
}

如

val pong = incoming.receive() as Frame.Text
println(pong.readText())

发送第一条消息后显式调用close()也应该可以，但目前尚不支持。我为此提交了单独的问题:https://github.com/ktorio/ktor/issues/1946