Express.js 'socket.io/socket.io.js 404'

Express.js 'socket.io/socket.io.js 404'

本文关键字：socket io js Express      更新时间：2023-09-26

我正试图在我的网站http://clickthebutton.herokuapp.com上加入一个使用Express JS的实时用户计数。试图安装套接字时。我得到这个错误:

GET /socket.io/socket.io.js 404 1.911 ms - 1091

是的，我已经使用了'npm install socket。io,保存

我四处寻找答案，试过了，没有任何帮助。如果有人认为他们知道发生了什么，我们将非常感激!下面是我的代码:

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 io = require('socket.io')(app);
var routes = require('./routes/index');
var users = require('./routes/users');
var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);
var server = app.listen(app.get('port'), function () {
    console.log('server listening on port ' + server.address().port);
})
var io = require('socket.io').listen(server);
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
// 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('/', 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;

index.ejs 

           <!-- socket.io -->
           <script src="socket.io/socket.io.js"></script>
           <script type="text/javascript">
            var socket = io.connect();
           </script>
         </div>
    </center>
   </body>

路线/index.js 

var express = require('express');
var router = express.Router();
var redis = require('redis'), client = redis.createClient(secret, "secret"); client.auth("secret", function() {console.log("Connected!");});
var app = express();
var server = require('http').Server(app);
var http = require('http');
var io = require('socket.io').listen(server);
io.on('connection', function(socket){
  console.log('a user connected');
    console.log(Object.keys(io.sockets.connected));
});

io.on('connection', function (socket) {
  console.log('Socket.io connected!')
});

我只复制/粘贴了引用socket.io的代码

谢谢!

仅在app.js中，您就创建了三个 socket.io实例，并且在routes/index.js中再次创建。在整个应用程序中应该只有一个。

Express的常见设置如下:

var app    = require('express')();
var server = app.listen(app.get('port'), function () {
  console.log('server listening on port ' + server.address().port);
});
var io = require('socket.io')(server);

如果您需要在其他文件中引用app, server或io，则需要将其作为变量传递。

EDIT:因为您使用的是基于express-generator的设置，所以HTTP服务器将在bin/www而不是app.js中创建。在这种情况下，您还需要在这里创建socket.io服务器:

/**
 * Create HTTP server.
 */
var server = http.createServer(app);
var io = require('socket.io')(server); // add this line

同样，如果您需要在代码库的其他地方引用io，您需要从那里传递它。

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