express3/4引入socket.io

app.js

var express = require('express');
var path = require('path');
var session = require('express-session')
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var ejs = require('ejs');
var index = require('./routes/index');
var userindex = require('./controler/index');
var debug = require('debug')('exp:server');
var port = normalizePort(process.env.PORT || '4000');
var app = express();
app.set('port', port);

var allowCrossDomain = function(req, res, next) {
    res.header('Access-Control-Allow-Origin', 'http://127.0.0.1:8080');
    res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,OPTIONS');
    res.header('Access-Control-Allow-Headers', 'Content-Type');
    res.header('Access-Control-Allow-Credentials', 'true');
    next();
};
app.use(allowCrossDomain);
// view engine setup
app.engine('html', ejs.__express);
// view engine setup
app.set('views', path.join(__dirname, 'public'));
app.set('view engine', 'html');

app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({
    extended: false
}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
// session 中间件
app.use(session({
    name: "mumu", // 设置 cookie 中保存 session id 的字段名称
    secret: "mumu", // 通过设置 secret 来计算 hash 值并放在 cookie 中，使产生的 signedCookie 防篡改
    resave: false, // 强制更新 session
    saveUninitialized: false, // 设置为 false，强制创建一个 session，即使用户未登录
    cookie: {
        maxAge: 2592000000 // 过期时间，过期后 cookie 中的 session id 自动删除
    }
}))
var server = require('http').createServer(app);
var io = require('socket.io')(server);
io.on('connection', function (socket) {
    console.log("链接成功")
  socket.emit('news', { hello: 'world' });
  socket.on('my other event', function (data) {
    console.log(data);
  });
});
app.io=io;
index(app);
userindex(app);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    res.render('404');
});

// error handler
app.use(function(err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};

    // render the error page
    res.status(err.status || 500);
    res.render('500');
});

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

function normalizePort(val) {
    var port = parseInt(val, 10);

    if(isNaN(port)) {
        // named pipe
        return val;
    }

    if(port >= 0) {
        // port number
        return port;
    }

    return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
    if(error.syscall !== 'listen') {
        throw error;
    }

    var bind = typeof port === 'string' ?
        'Pipe ' + port :
        'Port ' + port;

    // handle specific listen errors with friendly messages
    switch(error.code) {
        case 'EACCES':
            console.error(bind + ' requires elevated privileges');
            process.exit(1);
            break;
        case 'EADDRINUSE':
            console.error(bind + ' is already in use');
            process.exit(1);
            break;
        default:
            throw error;
    }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
    var addr = server.address();
    var bind = typeof addr === 'string' ?
        'pipe ' + addr :
        'port ' + addr.port;
    debug('Listening on ' + bind);
}

routes/index

 app.use('/reg', require('./base/reg')(app.io));

reg.js

const express = require('express')
const router = express.Router()
const regcheck = require('../../sql/reg')
// GET /login 登录页
let reg = function(io) {
    router.post('/', function(req, res, next) {
        io.emit("reg",{"name":"成功"})
        try {
            regcheck.checktel(req).then(function(d) {
                return regcheck.checknickname(req);
            }).then(function(d) {
                return regcheck.reg(req)
            }).then(function(d) {
                res.send(d)
            }).catch(function(d) {
                res.send(d)
            });
        } catch(e) {
            console.log(e)
        }
    })
    return router;
}
module.exports = reg