如何结合Express.JS使用Socket.io(使用Express应用程序生成器) [英] How to use Socket.io combined with Express.JS (using Express application generator)
问题描述
我正在尝试将 Socket.io 与 Express.JS 结合使用(使用 Express 应用程序生成器).
我发现了一些如何做到这一点的答案(在 Express 4 和 express-generator 的/bin/www 中使用 socket.io.
我的问题是我无法使用路由文件夹中的套接字.我可以在 app.js 和 bin/www.js 文件中使用它们.当我调用路由 index.js 时,它只会长时间加载网页而不会出现任何错误.
bin/www.js
I'm trying to use Socket.io combined with Express.JS (using Express application generator).
I've found some aswers how to do this (Using socket.io in Express 4 and express-generator's /bin/www).
My problem is that i cannot make use of the sockets inside the routes folder.
I can use them in the app.js and bin/www.js files. When i call the route index.js it just keeps loading the webpage for a long time without giving any errors.
bin/www.js
...
/**
* Create HTTP server.
*/
var server = http.createServer(app);
var io = app.io
io.attach( server );
...
app.js
...
// Express
var app = express();
// Socket.io
var io = socket_io();
app.io = io;
var routes = require('./routes/index')(io);
...
routes/index.js
module.exports = function(io) {
var app = require('express');
var router = app.Router();
io.on('connection', function(socket) {
console.log('User connected');
});
return router;
}
推荐答案
以下是我在 GitHub 上提供的有关如何将 Socket.io 与 Express 一起使用的简单示例:
Here is a simple example on how to use Socket.io with Express that I made available on GitHub here:
后端代码是这样的:
var path = require('path');
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', (req, res) => {
console.error('express connection');
res.sendFile(path.join(__dirname, 'si.html'));
});
io.on('connection', s => {
console.error('socket.io connection');
for (var t = 0; t < 3; t++)
setTimeout(() => s.emit('message', 'message from server'), 1000*t);
});
http.listen(3002, () => console.error('listening on http://localhost:3002/'));
console.error('socket.io example');
参见 https://github.com/rsp/node-websocket-vs-socket.io/blob/master/si.js
正如您在此处看到的,我正在创建 express 应用程序:
As you can see here, I am creating the express app with:
var app = require('express')();
然后我使用该应用程序创建一个 http 服务器:
Then I create an http server with that app with:
var http = require('http').Server(app);
最后我使用那个 http 服务器来创建 Socket.io 实例:
And finally I use that http server to create the Socket.io instance:
var io = require('socket.io')(http);
运行后:
http.listen(3002, () => console.error('listening on http://localhost:3002/'));
这一切都可以协同工作.
it all works together.
您可以在 GitHub 上查看整个示例,其中包含有效的后端和前端代码.它目前使用 Express 4.14.0 和 socket.io 1.4.8.
You can see the entire example on GitHub with both backend and frontend code that works. It currently uses Express 4.14.0 and socket.io 1.4.8.
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