动态命名空间Socket.IO

Question

如何在socket.io中使用动态命名空间.

我正在寻找(可怜的)文档,它说必须像这样使用命名空间:

io.of('/news')

io.of('/akfda')

要使用命名空间io.of("/namespace").

我是否需要在服务器中注册每个命名空间？也许我想要一个动态内容的命名空间.

我该怎么做:

io.of('/:somethign/:id')

Answer 1

Socket.IO支持'rooms'(https://github.com/LearnBoost/socket.io/wiki/Rooms),你可以使用它而不是命名空间.此外,当您需要动态路线(并在您的应用程序中使用快递) - 最好的方法是使用快递箱使用路线引擎.

• 使用Express.js(node.js)进行动态路由的最佳方法
• 在Express-js中使用路由
• http://expressjs.com/api.html#app.routes
• http://shtylman.com/post/expressjs-re-routing/
• http://jordanhoff.com/post/22602013678/dynamic-express-routing

但是,如果您仍然认为在socket.io中需要动态名称空间,这里有一个小例子如何实现它:

用户端:

var connect = function (ns) {
    return io.connect(ns, {
       query: 'ns='+ns,
       resource: "socket.io"
    });
}

var socket = connect('/user/12');

服务器端:

var url = require('url');
  , ev = new events.EventEmitter()

// <ns name>: <ns regexp>
var routes = {
  // /user/:id
  'user': '^\\/user\\/(\\d+)$',

  // /:something/:id
  'default': '^\\/(\\\w+)\\/(\\d+)$'
};

// global entry point for new connections
io.sockets.on('connection', function (socket) {
  // extract namespace from connected url query param 'ns'
  var ns = url.parse(socket.handshake.url, true).query.ns;
  console.log('connected ns: '+ns)

  //
  for (var k in routes) {
    var routeName = k;
    var routeRegexp = new RegExp(routes[k]);

    // if connected ns matched with route regexp
    if (ns.match(routeRegexp)) {
      console.log('matched: '+routeName)

      // create new namespace (or use previously created)
      io.of(ns).on('connection', function (socket) {
        // fire event when socket connecting
        ev.emit('socket.connection route.'+routeName, socket);

        // @todo: add more if needed
        // on('message') -> ev.emit(...)
      });

      break;
    }
  }

  // when nothing matched
  // ...
});

// event when socket connected in 'user' namespace
ev.on('socket.connection route.user', function () {
  console.log('route[user] connecting..');
});

// event when socket connected in 'default' namespace
ev.on('socket.connection route.default', function () {
  console.log('route[default] connecting..');
});

我希望这能帮到您!

Answer 2

我会使用"房间"来支持您的动态内容.

服务器端

var server = require('http').createServer(),
    io     = require('socket.io')(server);


io.on('connection', function(socket){

  var room = socket.handshake['query']['r_var'];

  socket.join(room);
  console.log('user joined room #'+room);

  socket.on('disconnect', function() {
    socket.leave(room)
    console.log('user disconnected');
  });

  socket.on('chat message', function(msg){
    io.to(room).emit('chat message', msg);
  });

});

server.listen(3000);

客户端

var socket_connect = function (room) {
    return io('localhost:3000', {
        query: 'r_var='+room
    });
}

var random_room = Math.floor((Math.random() * 2) + 1);
var socket      = socket_connect(random_room);

socket.emit('chat message', 'hello room #'+random_room);
....

Answer 3

从版本开始，2.1.1我能够使用它：

wss.of((nsp, query, next) => {
  const { token } = query;

  // Do your authentication or whatever here...

  // If success
  next(null, true);

}).on('connect', (socket) => {
  // socket connected to your namespace
});