如何在 Angular 4.3.5 中拦截对组件 html 模板的请求

Question

我需要拦截对 html 组件模板的请求。 Angular 版本为 4.3.5.

我试图通过实现拦截器来实现它，如 angular httpClient 手册 (https://angular.io/guide/http) 中所述

interceptor.service.js

import {Injectable} from '@angular/core';
import {HttpEvent, HttpInterceptor, HttpHandler, HttpRequest} from '@angular/common/http';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {
  constructor(private auth: AuthService) {}

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    // Get the auth header from the service.
    const authHeader = this.auth.getAuthorizationHeader();
    // Clone the request to add the new header.
    const authReq = req.clone({headers: req.headers.set('Authorization', authHeader)});
    // Pass on the cloned request instead of the original request.
    return next.handle(authReq);
  }
}

app.module.js

import {NgModule} from '@angular/core';
import {HTTP_INTERCEPTORS} from '@angular/common/http';

@NgModule({
  providers: [{
    provide: HTTP_INTERCEPTORS,
    useClass: NoopInterceptor,
    multi: true,
  }],
})
export class AppModule {}

但它会拦截来自我自己编写的服务和组件的 http 请求，但不会拦截由 angular.

对 html 模板发出的请求

还有其他方法吗？

Answer 1

如果您可以访问 @angular/compiler 然后尝试覆盖 ResourceLoader:

main.ts

platformBrowserDynamic([{
    provide: COMPILER_OPTIONS,
    useValue: { providers: [{ 
                  provide: ResourceLoader, 
                  useClass: CustomResourceLoader, 
                  deps: [] 
              }]
    },
    multi: true
}]).bootstrapModule(AppModule);

Plunker Example

如何在 Angular 4.3.5 中拦截对组件 html 模板的请求

How to intercept request to component html templates in Angular 4.3.5

angular

angular4-httpclient