Socket.io通过websockets - 随机的"传输结束"断开连接

Question

运用

Web应用程序.NodeJS + Socket.io(仅限websockets,启用心跳).

问题

我的应用程序工作正常(它连接到Socket.io,它正确地发出/接收消息),但我检测到随机断开,而不是因为心跳超时.即使服务器从客户端收到心跳包,仍然可能在几秒钟内断开此客户端.我不明白原因.它几乎是随机发生的,大约每3-15分钟一次.更改socket.io配置似乎不会影响频率.

这是日志,它清楚地表明断开连接的原因不是心跳超时,而是传输端(套接字端):

日志:

debug: emitting heartbeat for client cTVCsv2GS2R_lh3Ecao-
debug: websocket writing 2::
debug: set heartbeat timeout for client cTVCsv2GS2R_lh3Ecao-
debug: got heartbeat packet
debug: cleared heartbeat timeout for client cTVCsv2GS2R_lh3Ecao-
debug: set heartbeat interval for client cTVCsv2GS2R_lh3Ecao-
info: transport end (socket end) 
// ^ Why?
debug: set close timeout for client cTVCsv2GS2R_lh3Ecao-
debug: cleared close timeout for client cTVCsv2GS2R_lh3Ecao-
debug: cleared heartbeat interval for client cTVCsv2GS2R_lh3Ecao-
SOCK 25.12 22:23:20.675 disconnection from IO detected (USER1) 
// ^ This means disconnected event fired
debug: discarding transport
debug: client authorized
info: handshake authorized GPBLHsqhhrdsTeqTcao_
debug: setting request GET /socket.io/1/websocket/GPBLHsqhhrdsTeqTcao_?conftoken=20519986772
debug: set heartbeat interval for client GPBLHsqhhrdsTeqTcao_
debug: client authorized for
debug: websocket writing 1::
debug: client authorized for /io/activity
debug: websocket writing 1::/io/activity
SOCK 25.12 22:23:23.005 reconnected to IO (USER1)

组态

客户:

socket = io.connect('/io/activity',{'max reconnection attempts':Infinity})

服务器:

io = require('socket.io').listen(server, { 
      log: true
    , "close timeout": 120
    , "heartbeat timeout": 120
    , "heartbeat interval": 30
    , "transports": ["websocket"]
})

io.enable('browser client minification')
io.enable('browser client etag')
io.enable('browser client gzip')

Answer 1

如果我使用我不知道其内部工作原理的包，我通常会进行防御性编码。

几年前，我在使用 socke.io 时遇到了随机错误，我只是简单地监听错误事件，然后重新启动连接。注意部分客户端的数据可能会丢失，所以要小心处理错误。

查看 socket.io 错误会很有帮助。祝你好运