Question

尝试设置基本的wss客户端。频道已激活，但随后立即断开，没有任何异常。

客户端：

class WebSocketClient(val uri: String) {

    lateinit var ch: Channel

    fun connect() {
        val bootstrap = Bootstrap()
        val uri: URI = URI.create(uri)
        val handler = WebSocketClientHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, false, HttpHeaders.EMPTY_HEADERS, 1280000))

        bootstrap.group(NioEventLoopGroup())
                .channel(NioSocketChannel::class.java)
                .handler(object : ChannelInitializer<SocketChannel>() {
                    override fun initChannel(ch: SocketChannel) {
                        val pipeline = ch.pipeline()
                        pipeline.addLast("http-codec", HttpClientCodec())
                        pipeline.addLast("aggregator", HttpObjectAggregator(65536))
                        pipeline.addLast("ws-handler", handler)
                    }
                })
        ch = bootstrap.connect(uri.host, 443).sync().channel()
        handler.channelPromise.sync()
    }
}

处理程序：

class WebSocketClientHandler(val handShaker: WebSocketClientHandshaker) : SimpleChannelInboundHandler<Any>() {

    lateinit var channelPromise: ChannelPromise

    override fun handlerAdded(ctx: ChannelHandlerContext) {
        channelPromise = ctx.newPromise()
    }

    override fun channelActive(ctx: ChannelHandlerContext) {
        handShaker.handshake(ctx.channel())
    }

    override fun channelRead0(ctx: ChannelHandlerContext, msg: Any) {
        val ch = ctx.channel()
        if (!handShaker.isHandshakeComplete) {
            handShaker.finishHandshake(ch, msg as FullHttpResponse)
            channelPromise.setSuccess()
            return
        }

        val frame = msg as WebSocketFrame
        if (frame is TextWebSocketFrame) {
            println("text message: $frame")
        } else if (frame is PongWebSocketFrame) {
            println("pont message")
        } else if (frame is CloseWebSocketFrame) {
            ch.close()
        } else {
            println("unhandled frame: $frame")
        }
    }
}

处理程序调用流程：

handleAdded
channelRegistered
channelActive
channelReadComplete
channelInactive
channelUnregistered
handlerRemoved

有什么我错过的吗？

Answer 1

您忘记添加SSLHandler，因为您要连接到https端口（443），所以需要此处理程序，因此远程服务器期望加密所有流量。向https端口发送未加密的消息具有未定义的行为，某些服务器将关闭您的连接，其他服务器将重定向发送回https。

您可以使用以下方式添加sslhandler：

<强>的java：

final SslContext sslCtx = SslContextBuilder.forClient()
//  .trustManager(InsecureTrustManagerFactory.INSTANCE)
    .build();

pipeline.addLast("ssl-handler", sslCtx.newHandler(ch.alloc(), url.getHost(), 443));

// Your remaining code....
pipeline.addLast("http-codec", new HttpClientCodec())

Netty wss套接字客户端丢弃连接

1 个答案: