springcloud+netty+nginx开发websock

在用springcloud开发过程中对netty开发的websocket进行心跳超时设置，开始设置的时间是10分钟，超时就断开，发现部署到dev环境中，还是1分钟没有消息交互，准时断开连接。最后调试发现是nginx超时断开了，于是在nginx加入配置。

netty心跳超时设置

pipeline.addLast(new IdleStateHandler(properties.getReadTimeout(), properties.getWriteTimeout(), properties.getAllTimeout(), TimeUnit.SECONDS));
pipeline.addLast(new HeartbeatServerHandler());

@Slf4j
public class HeartbeatServerHandler extends ChannelInboundHandlerAdapter {

    // Return a unreleasable view on the given ByteBuf
    // which will just ignore release and retain calls.
    private static final ByteBuf HEARTBEAT_SEQUENCE = Unpooled.unreleasableBuffer(Unpooled.copiedBuffer("Heartbeat", CharsetUtil.UTF_8));  // 1

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
        if (evt instanceof IdleStateEvent) {  // 2
            IdleStateEvent event = (IdleStateEvent) evt;
            String type = "";
            if (event.state() == IdleState.READER_IDLE) {
                type = "read idle";
            } else if (event.state() == IdleState.WRITER_IDLE) {
                type = "write idle";
            } else if (event.state() == IdleState.ALL_IDLE) {
                type = "all idle";
            }
            ctx.writeAndFlush(HEARTBEAT_SEQUENCE.duplicate()).addListener(ChannelFutureListener.CLOSE_ON_FAILURE);  // 3
            log.info("===>>> client timeout type: {}, address: ", type, ctx.channel().remoteAddress());
        } else {
            super.userEventTriggered(ctx, evt);
        }
    }
}

nginx配置
设置keepalive_timeout无效，这里是用nginx代理的wss服务。所以需要使用proxy_..._timeout配置。

http{
    proxy_read_timeout    600;
    proxy_send_timeout    600; 
    ...
}