Node.js Socket.io〜在連接上不起作用

Question

我剛剛開始使用node.js和socket.io。

斌/ www

var app = require('../app');
var debug = require('debug')('untitled:server');
var http = require('http');

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

//var server = http.createServer(app);

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

io.on('connection', function (socket) {
  console.log('A new user connected');   <---- Not working 
  });
});

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(app.get('port'), function () {
  console.log('Express server listening on port ' + app.get('port'));
});

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

/**
 * Normalize a port into a number, string, or false.
 */

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);
}

app.js

var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');

var routes = require('./routes/index');
var users = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
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')));
app.use(express.static(path.join(__dirname, '/node_modules/bootstrap/dist')));
app.use(express.static(path.join(__dirname, '/node_modules/jquery/dist')));

app.use('/', routes);
app.use('/users', users);


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

// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
      message: err.message,
      error: err
    });
  });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
  res.status(err.status || 500);
  res.render('error', {
    message: err.message,
    error: {}
  });
});


module.exports = app;

node.js程序將起作用，唯一的問題是我無法從控制台獲取打印輸出“新用戶已連接”。 因此，我認為我的socket.io存在一些問題。

Answer 1

你至少包括

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io();
</script>

在您的客戶端html中？ 否則，沒有連接是開放式的...

Answer 2

嘗試做兩件事：

1. 將server.listen函數放在調用套接字之上

2. 像這樣將您對io的呼叫更改為：

   var io = require（'socket.io'）。listen（server）;