是否可以在嵌套惰性模块中使用 HTTP_INTERCEPTORS？

Question

我有一个 FooModule 嵌套在 AppModule:

AppModule:

import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.model';

@NgModule({
  imports: [
    AppRoutingModule
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

FooModule:

import { NgModule } from '@angular/core';
import { AuthInterceptorService } from '../auth/auth-interceptor.service';
import { HTTP_INTERCEPTORS } from '@angular/common/http';

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

正在通过延迟加载加载 FooModule：

AppRoutingModule:

const appRoutes : Routes = [
    {
        path: "foos",
        loadChildren: () =>
          import("./foos/foos.module").then(m => m.FoosModule)
    }
]

@NgModule({
    imports: [RouterModule.forRoot(appRoutes, { preloadingStrategy: PreloadAllModules })],
    exports: [RouterModule]
})
export class AppRoutingModule {
}

但只有当我将 HTTP_INTERCEPTORS 移动到 AppModule 时，http-s 才会被拦截，有没有办法让拦截器从 FooModule.

我问的是导致拦截器执行添加仅与 FooModule.

相关的授权的特定工作

Answer 1

看起来可以通过嵌套延迟加载模块加载 HTTP_INTERCEPTORS，我只是缺少在嵌套模块中导入 HttpClientModule：

@NgModule({
  import: HttpClientModule,
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: AuthInterceptorService,
      multi: true
    }
  ]
})
export class FooModule {}

但是，因为HttpClientModule是一个单例，所以它应该只定义一次，最好的地方是在AppModule里面。所以我最终将拦截器和 http 客户端从 AppModule 导入，同时将 resolve 修改为基于 req.url:

的条件解析器

intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    if (req.url == this._config.SecretAPI) {
        //Add Authorization Header:
        const modifiedReq = req.clone({ 
            headers: new HttpHeaders().set('Authorization', this._authService.authorizationHeaderValue)
        });
        return next.handle(modifiedReq);
    }
    else {
        return next.handle(modifiedReq);
    }
}

是否可以在嵌套惰性模块中使用 HTTP_INTERCEPTORS？

Is it possible to use HTTP_INTERCEPTORS within a nested lazy module?

angular-http-interceptors

angular