renderModuleFactory中的Angular 6訪問依賴注入器

Question

誰能指導如何訪問依賴注入器以在renderModuleFactory中獲取服務實例？

實際上，我需要在main.server文件中為SSR返回正確的http狀態代碼。 使用ASP.net，我們無法訪問Response對象，因為在NodeJ的情況下我們可以使用它。

也請看看ASP.Net Core 2.1 Angular SSR / Universal返回Http Status Code 404以了解上下文。

Answer 1

我現在通過執行以下操作解決了此問題。 這個問題已經快一年了，但這也許還是有幫助的。

export { AppServerModule } from './server/app-server.module';

// Add this line so that you can provide this token in your aspnet-rendering script as shown below.
// The reason we have to export the service here is so you can get access to the same copy used by the Angular code.
export { StatusCodeService as StatusCodeServiceToken } from './server/services/http-response.service';

const { AppServerModule, AppServerModuleNgFactory, LAZY_MODULE_MAP, StatusCodeServiceToken } = require('./../server/main.js');

export default createServerRenderer(async params => {
  // Instantiate your service manually.
  const statusCodeService = new StatusCodeService();

  const options = {
    document,
    url: params.url,
    extraProviders: [
      provideModuleMap(LAZY_MODULE_MAP),
      // Provide your instance as a value provider.
      { provide: StatusCodeServiceToken, useValue: statusCodeService }
    ]
  };

  const html = AppServerModuleNgFactory
    ? await renderModuleFactory(AppServerModuleNgFactory, options)
    : await renderModule(AppServerModule, options);

  return {
    html,
    // Then you can retrieve the value because you have the instance.
    statusCode: statusCodeService.statusCode
  }
});