无论如何，将Websockets与express-ws和WebSocket客户端api与Angular Universal 9应用一起使用？

Question

我对所发生的事情完全不知所措，因此我将发布运行我的快速服务器的Angular Universal服务器代码。

我认为Angular Unviersal的渲染引擎中有些东西完全只是在阻塞websockets。

没有任何配置或我所做的任何事情都可以解决websocket而没有得到：

'ws://localhost:4201/echo' failed: Connection closed before receiving a handshake response

// The Express app is exported so that it can be used by serverless Functions.
export function app() {
  const server = express();
  const distFolder = join(process.cwd(), 'dist/ai-ggggg-frontend-website/browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  server.use('/swagger/api-docs', express.static('./dist/ai-heagggggd-website/browser/swagger'));

  // Our Universal express-engine (found @ https://github.com/angular/universal/tree/master/modules/express-engine)
  server.engine('html', ngExpressEngine({
    bootstrap: AppServerModule,
  }));

  server.set('view engine', 'html');
  server.set('views', distFolder);

  // Example Express Rest API endpoints
  // server.get('/api/**', (req, res) => { });
  // Serve static files from /browser
  server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));

  // All regular routes use the Universal engine
  server.get('*', (req, res) => {
    res.render(indexHtml, { req, providers: [{ provide: APP_BASE_HREF, useValue: req.baseUrl }] });
  });

  return server;
}

function run() {
  const port = process.env.PORT || 4000;

  // Start up the Node server
  const server = app();

  server.listen(port, () => {
    console.log(`Node Express server listening on http://localhost:${port}`);
  });
}

// Webpack will replace 'require' with '__webpack_require__'
// '__non_webpack_require__' is a proxy to Node 'require'
// The below code is to ensure that the server is run only when not requiring the bundle.
declare const __non_webpack_require__: NodeRequire;
const mainModule = __non_webpack_require__.main;
const moduleFilename = mainModule && mainModule.filename || '';
if (moduleFilename === __filename || moduleFilename.includes('iisnode')) {
  run();
}

export * from './src/main.server';

Answer 1

您最好的选择是使用平台检测功能，以便您知道何时使用客户端代码以及何时使用服务器端代码。

This answer may help you