为什么我的客户端无法获得socket.io.js？

Question

我正在学习使用socket.io，但是当我添加

时

script(type='text/javascript', src='/socket.io/socket.io.js')

<击> 在我的客户端，我添加代码：

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

io.on('connection', function(socket){
  console.log('------------connection');
});

<{1}}中的

，但我的客户在尝试获取app.js时遇到404错误。

我将我的代码变为：

/socket.io/socket.io.js

我在javascript中也有以下代码：

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();

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

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

var userlist = {};

io.on('connection', function(data){
  console.log('------------connection');
  socket.name = data.user;

  if (!userlist[data.user]) {
    userlist[data.user] = data.user;
  };

  io.emit("online", { userlist: userlist, user: data.user});
});


// 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: {}
  });
});

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

module.exports = app;