node.js 如何正确关闭 socket.io / websocket-client？

How does one properly shutdown socket.io / websocket-client?

提问by Chris

I'm trying to create a test using LearnBoost's socket.ioand the node-websocket-client. Communication between the client and server work great. After all communication is done, I close both the client and the server. Yet the program hangs, waiting on some unknown callback. Two questions:

我正在尝试使用LearnBoost 的 socket.io和node-websocket-client创建一个测试。客户端和服务器之间的通信工作得很好。完成所有通信后，我关闭客户端和服务器。然而程序挂起，等待一些未知的回调。两个问题：

1. What is the following program waiting for?
2. Is there a tool for diagnosing outstanding callbacks in node programs?

1. 下面的程序在等什么？
2. 是否有用于诊断节点程序中未完成回调的工具？

---

---

var connect = require('connect'),
    io = require('socket.io'),
    WebSocket = require('websocket-client').WebSocket;

var port = 7111;

var server = connect.createServer();

var socket = io.listen(server); 
socket.on('connection', function(client) {
  client.send('Welcome!');

  client.on('message', function(message) {
    console.log(message);
  });

  client.on('disconnect', function() {
    console.log('closing');
    server.close();
  });
});

server.listen(port, function() {
  var ws = new WebSocket('ws://localhost:' + port + '/socket.io/websocket');
  ws.onmessage = function(message) {
    console.log(message.data);
  };

  setTimeout(function() {
    ws.send('~m~3~m~Yo!');
    ws.close();
  }, 10);
});

EDIT: changed the variable name of the WebSocket to wsto avoid confusion

编辑：更改了 WebSocket 的变量名称ws以避免混淆

回答by Raynos

var socket = io.listen(server);

You've created a socket on a port. You've never closed it.

您已经在端口上创建了一个套接字。你从来没有关闭它。

socket.server.close()closes your (socket.io) socket.

socket.server.close()关闭您的 (socket.io) 套接字。

When in doubt read the socket.iogithub examples

如有疑问，请阅读socket.iogithub示例

socket.server === serverIt's the server you pass in, in the liste statement so it's closed. I'm not sure what it's waiting for.

socket.server === server这是您在 liste 语句中传入的服务器，因此它已关闭。我不确定它在等什么。

回答by ppcano

Below a way to shutdown all the connections and be able to run multiple expresso tests (using socket.io and socket.io-client).

下面是关闭所有连接并能够运行多个 expresso 测试的方法（使用 socket.io 和 socket.io-client）。

The solution is tricky and buggy but works on 0.8.5. The main problem is regarding the library to use websockets (node-websocket-client).

该解决方案是棘手和错误的，但适用于 0.8.5。主要问题是关于使用 websockets (node-websocket-client) 的库。

Currently, on socket.io, the OS contributors have patched the websocket client. So, we must do the same on our socket.io-client npm package to be able to use finishClose method on the socket client side. Socket.io-client uses the websocket library as npm package, so you must find the file (websocket.js) and substitute it with the same on socket.io.

目前，在 socket.io 上，操作系统贡献者已经修补了websocket 客户端。所以，我们必须在 socket.io-client npm 包上做同样的事情，才能在 socket 客户端使用 finishClose 方法。Socket.io-client 使用 websocket 库作为 npm 包，因此您必须找到文件（websocket.js）并将其替换为 socket.io 上的相同文件。

Afterwards, you could use finishClose method to ensure the connections are closed and with some custom server/client socket settings, the tests will run correctly.

之后，您可以使用 finishClose 方法来确保连接关闭，并且使用一些自定义服务器/客户端套接字设置，测试将正确运行。

  var  io = require("socket.io").listen(port);

  io.set('close timeout', .2);
  io.set('client store expiration', .2);

  var client = require("socket.io-client").connect( "http://localhost", { port: port ,  'reconnect': false, 'force new connection': true});

  client.on('connect', function() {

        client.disconnect();

  });

  client.on('disconnect', function() {

      client.socket.transport.websocket.finishClose();
      io.server.close();

  });

  io.server.on('close', function() {

      setTimeout( function() {

        done();

      }, 500);
  });

Hope, somebody can help.

希望，有人可以帮忙。

回答by Detect

The program is waiting because socket.io (server) is still listening for incoming connections. I don't know of any way to stop listening.

该程序正在等待，因为 socket.io（服务器）仍在侦听传入连接。我不知道有什么办法可以停止聆听。