Node.js 重构Express和SocketIO应用程序

我意识到有类似的问题，但我找不到一个对我有帮助的。我有一个ExpressJS4应用程序，我也在使用SocketIO。我的

server.js

文件的一个片段如下所示：

// server.js
...
var app = express();
var server = require('http').createServer(app).listen(process.env.PORT || 8080);
var io = require('socket.io')(server);

var routesApi = require('./server/routes/api');

module.exports = app;

var api = function(server){
    var ctrlPosts = require('../controllers/posts')(server);
}

var routesApi = require('./server/routes/api')(server);

我有

api.js

：

// server/routes/api.js
...
var ctrlPosts = require('../controllers/posts');
router.post('/posts', ctrlPosts.create);
...

以及我的邮务主任：

// controllers/posts
module.exports.create = function(req, res) {
  //how can I access io from here?
}

问题

---

如何从posts控制器访问SocketIO？

您可以将posts控制器设计为接受构造函数中的参数

var controller = function(server){
    var io = require('socket.io')(server);
    var module = {
        create : function(req, res) {...}
    }
    return module;
}

与此类似，您可以将routes api设计为接受服务器参数和call posts控制器，如下所示：

// server.js
...
var app = express();
var server = require('http').createServer(app).listen(process.env.PORT || 8080);
var io = require('socket.io')(server);

var routesApi = require('./server/routes/api');

module.exports = app;

var api = function(server){
    var ctrlPosts = require('../controllers/posts')(server);
}

var routesApi = require('./server/routes/api')(server);

并且需要这样的api：

// server.js
...
var app = express();
var server = require('http').createServer(app).listen(process.env.PORT || 8080);
var io = require('socket.io')(server);

var routesApi = require('./server/routes/api');

module.exports = app;

var api = function(server){
    var ctrlPosts = require('../controllers/posts')(server);
}

var routesApi = require('./server/routes/api')(server);

---

您可以将posts控制器设计为接受构造函数中的参数

var controller = function(server){
    var io = require('socket.io')(server);
    var module = {
        create : function(req, res) {...}
    }
    return module;
}

与此类似，您可以将routes api设计为接受服务器参数和call posts控制器，如下所示：

// server.js
...
var app = express();
var server = require('http').createServer(app).listen(process.env.PORT || 8080);
var io = require('socket.io')(server);

var routesApi = require('./server/routes/api');

module.exports = app;

var api = function(server){
    var ctrlPosts = require('../controllers/posts')(server);
}

var routesApi = require('./server/routes/api')(server);

并且需要这样的api：

// server.js
...
var app = express();
var server = require('http').createServer(app).listen(process.env.PORT || 8080);
var io = require('socket.io')(server);

var routesApi = require('./server/routes/api');

module.exports = app;

var api = function(server){
    var ctrlPosts = require('../controllers/posts')(server);
}

var routesApi = require('./server/routes/api')(server);

---

在config目录中创建socket.js并导出io

// socket.js
var socketio = require('socket.io')

module.exports.listen = function(app){
    io = socketio.listen(app)

    posts = io.of('/posts')
    posts.on('connection', function(socket){
        socket.on ...
    })

    return io
}

然后在控制器中调用它

// controller
var io = require('./config/socket').listen(app)

---

在config目录中创建socket.js并导出io

// socket.js
var socketio = require('socket.io')

module.exports.listen = function(app){
    io = socketio.listen(app)

    posts = io.of('/posts')
    posts.on('connection', function(socket){
        socket.on ...
    })

    return io
}

然后在控制器中调用它

// controller
var io = require('./config/socket').listen(app)

---

谢谢，这很有用-我将

io

从

server.js

传递到

api.js

文件，然后传递到posts控制器。谢谢，这很有用-我将

io

从

server.js

传递到

api.js

文件，然后传递到posts控制器。