错误：找不到模块“。”

Question

我正在使用Angular Universal，Express和Webpack。我开始使用这个混帐回购协议的应用程序：

https://github.com/FrozenPandaz/ng-universal-demo

我似乎无法在我的main.server.ts使用socket.io。我可以进口，但试图安装时，它起来，我得到一个错误：

... 
import * as express from 'express'; 
import * as socket from 'socket.io'; 

enableProdMode(); 
const app = express(); 
const server = require('http').Server(app); 
const io = socket(server); 
// .  ^^ causes error 

app.engine('html', ngExpressEngine({ 
    bootstrap: ServerAppModule 
})); 

app.set('view engine', 'html'); 
app.set('views', 'src'); 

app.use('/', express.static('dist', {index: false})); 

server.listen(1337); 

app.get('test', (req, res) => { 
    res.render('../dist/index', { 
    req: req, 
    res: res 
    }); 
}); 

io.on('connection', (socket) => { 
    socket.on('register', (data) => { 
    socket.join(data); 
    user = data; 
    }); 
}); 

该错误是因为socket(server)调用的发生，因为如果我评论了这一点的错误不会发生：

/Users/michaelwilson/Code/app/dist/server.js:101828 
    return /*require.resolve*/(!(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }())); 
                                      ^

Error: Cannot find module "." 
    at webpackMissingModule (/Users/michaelwilson/Code/app/dist/server.js:101828:76) 
    at resolvePath (/Users/michaelwilson/Code/app/dist/server.js:101828:154) 
    at Server.serveClient (/Users/michaelwilson/Code/app/dist/server.js:101831:25) 
    at new Server (/Users/michaelwilson/Code/app/dist/server.js:101770:8) 
    at Server (/Users/michaelwilson/Code/app/dist/server.js:101762:41) 
    at Object.<anonymous> (/Users/michaelwilson/Code/app/dist/server.js:113993:10) 
    at __webpack_require__ (/Users/michaelwilson/Code/app/dist/server.js:26:30) 
    at /Users/michaelwilson/Code/app/dist/server.js:94:18 
    at Object.<anonymous> (/Users/michaelwilson/Code/app/dist/server.js:97:10) 
    at Module._compile (module.js:570:32) 
[nodemon] app crashed - waiting for file changes before starting... 

我不确定还有什么可以尝试的，这是Webpack + Socket.io的问题吗？我找不到任何人有同样的问题...

编辑：我已经找到了这个代码在socket.io库发生，其行试图做一个动态的决心：

return /*require.resolve*/(!(function webpackMissingModule() { var e = new Error("Cannot find module \".\""); e.code = 'MODULE_NOT_FOUND'; throw e; }())); 

Answer 1

我设法通过设置serveClient属性摆脱这种误差对false像这样：

const io = require('socket.io')(server, { 
    serveClient: false, 
    wsEngine: 'ws' // uws is not supported since it is a native module 
}); 

https://github.com/socketio/socket.io/tree/master/examples/webpack-build-server https://socket.io/docs/server-api/#server-serveclient-value