Angular 9 SSR 404 未找到带有状态代码的页面

我正在使用 Angular 9 和 SSR，现在正在尝试获取 404 页面。它与客户端成功合作。但状态始终为 200 Ok。当我尝试使用 Angular ssr 时，它也显示 200 是状态代码。 我的 Angular 路由器已成功传递到 404 组件，但问题在于状态代码。请各位朋友帮帮我吧...

我的路由器详细信息 -

{
path: '404',
loadChildren: () => import('./not-found/not-found.module').then(m => m.NotFoundModule)
},
{
path: 'Home',
loadChildren: () => import('./all-india/all-india.module').then(m => m.AllIndiaModule)
},
{
path: '**',
loadChildren: () => import('./not-found/not-found.module').then(m => m.NotFoundModule)
}

我的未找到组件.HTML

<h1>404 Not Found</h1>

我的未找到 Component.ts 文件

import { Component, OnInit, Optional, Inject,Injector, PLATFORM_ID } from '@angular/core';
import { RESPONSE } from '@nguniversal/express-engine/tokens';
import { isPlatformServer } from '@angular/common';
import { Response } from 'express';

@Component({
selector: 'app-not-found',
templateUrl: './not-found.component.html',
styleUrls: ['./not-found.component.css']
})
export class NotFoundComponent implements OnInit {

constructor(
@Optional() @Inject(RESPONSE) private response: Response,@Inject(Injector) private injector: Injector,
@Inject(PLATFORM_ID) private platformId: Object) { }

ngOnInit() {
 if(isPlatformServer(this.platformId))//Only executes server side
     {
         const response = this.injector.get(RESPONSE) as Response;
         response.status(404);
     }
}
}

我的 Server.TS 文件

import 'zone.js/dist/zone-node';

import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import {REQUEST, RESPONSE} from '@nguniversal/express-engine/tokens';
import { join } from 'path';

import { AppServerModule } from './src/main.server';
import { existsSync } from 'fs';

export function app() {
  const compression = require('compression');
  const server = express();
  server.use(compression());
  const distFolder = join(process.cwd(), 'dist/angular-httpclient-example/browser');
  const indexHtml = existsSync(join(distFolder, 'index.original.html')) ? 'index.original.html' : 'index';

  // 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);

server.get('*.*', express.static(distFolder, {
    maxAge: '1y'
  }));

server.get('*', (req, res) => {
    res.render('index', {
      req: req,
      res: res,
      providers: [
          {
              provide: REQUEST, useValue: (req)
          },
          {
              provide: RESPONSE, useValue: (res)
          }
      ]
      });
  });

  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';

我尝试了很多方法。状态代码没有任何作用。

创建服务器端响应服务

@Injectable({
  providedIn: 'root'
})
export class ServerSideResponseService {
  private response: Response

  constructor(@Optional() @Inject(RESPONSE) response: any) {
    this.response = response
  }

  setNotFound(message = 'not found'): this {
    if (this.response) {
      this.response.statusCode = 404
      this.response.statusMessage = message
    }
    return this
  }
}

并在未找到组件中使用它

@Component({
  selector: 'app-not-found',
  templateUrl: './not-found.component.html',
  styleUrls: ['./not-found.component.css']
})
export class NotFoundComponent implements OnInit {

  constructor(private ssr: ServerResponseService) {
    this.ssr.setNotFound();
  }
}

参考https://github.com/DSpace/dspace-angular/commit/015b439a39208da4515eb4d18e4d21640fce1df0 https://github.com/DSpace/dspace-angular/commit/015b439a39208da4515eb4d18e4d21640fce1df0