Question

我正在尝试发出从单独文件连接的所有套接字。但是我似乎无法弄清楚。

Socket.js

var socketio = require('socket.io');
var users = require('./modules/users');

var io = socketio();
socket.io = io;

io.on('connection', function(socket){
  //Stuff
  console.log('Hello :)');
});

module.exports = socket;

Users.js

var socket = require('../socket');

function news(){
    socket.io.sockets.emit('news', {
        message: 'Woah! Thats new :)'
    })
}

setInterval(function(){
    news();
}, 5 * 1000);

但是，users.js中的socket似乎是空的，我似乎无法访问io对象。我该如何做才能将其发布给所有用户？无需将io.sockets解析为新闻功能或将我的功能移至套接字文件？

Answer 1

您可以使用 let 定义 io 对象作为 utils 和 io 函数中的全局变量。您可以从任何文件调用这些函数。例如：

git reflog

// app.js

const { socketConnection } = require('./utils/socket-io');
const http = require('http');
const express = require('express');

const app = express();
const server = http.createServer(app);
socketConnection(server);

// utils/socket-io

let io;
exports.socketConnection = (server) => {
  io = require('socket.io')(server);
  io.on('connection', (socket) => {
    console.info(`Client connected [id=${socket.id}]`);
    socket.join(socket.request._query.id);
    socket.on('disconnect', () => {
      console.info(`Client disconnected [id=${socket.id}]`);
    });
  });
};

exports.sendMessage = (roomId, key, message) => io.to(roomId).emit(key, message);

exports.getRooms = () => io.sockets.adapter.rooms;

Answer 2

Users.js

exports = module.exports = function(io){
  io.sockets.on('connection', function (socket) {
    socket.on('news', {
        message: 'Woah! Thats new :)'
    })
  });
}

App.js

const app = require('http').createServer(handler)
const io = require('socket.io').listen(app)
const Users = require('./modules/users')(io)
// const anotherModule = require('./modules/anotherModule')(io)
// const andSoOn = require('./modules/andSoOn')(io)

// and emit it here
setInterval(function(){
    io.emit('news')
}, 5 * 1000);

// you can expose the io object to other files
exports.io = io

希望现在对您有意义。

Answer 3

只需创建一个socket service对象，该服务对象仅发布一些helper函数。

您的案例示例：

// Socket.js
var socketio = require('socket.io');
var users = require('./modules/users');

var io = socketio();
socket.io = io;

io.on('connection', function (socket) {
  //Stuff
  console.log('Hello :)');
});

var toAll = function (eventName, data) {
  io.sockets.emit(event, data);
}

module.exports = {
  toAll: toAll // publish `toAll` function to call every where
};


// Users.js
var socketService = require('../socket');

function news() {
  socketService.toAll('news', {
    message: 'Woah! Thats new :)'
  });
}

setInterval(function () {
  news();
}, 5 * 1000);

Answer 4

我设法通过更改module.exports的位置来解决此问题。初始化socket变量后，我立即放了它，因为这是我导出的唯一东西。

从另一个文件访问SocketIO

4 个答案: