如何在 Angular 中返回可觀察對象內的值

Question

在 MSAL 進行身份驗證之前，我需要來自可觀察對象的響應來設置值。

有沒有辦法在 getAuthenticationConfiguration() observable 中返回值？

在可觀察對象中接收到值后，如何返回值。

ps subscribe function里面是不可能返回的。

export function MSALInstanceFactory(service: AzureService): IPublicClientApplication {
    service.getIdentityManagerApiRestService().getAuthenticationConfiguration().subscribe(response => {
        return new PublicClientApplication({
            auth: response.authenticationConfiguration, <-------- I want this
            cache: {
                cacheLocation: BrowserCacheLocation.LocalStorage,
                storeAuthStateInCookie: isIE, // set to true for IE 11. Remove this line to use Angular Universal
            }
        });
    })
}


@NgModule({
    declarations: [
        AzureComponent
    ],
    exports: [
        AzureComponent
    ],
    providers: [
        {
            provide: MSAL_INSTANCE,
            useFactory: MSALInstanceFactory,
            deps: [AzureService]
        }
    ]
})

export class AzureModule { }

Answer 1

我會嘗試 pipe 響應（未經測試的代碼）：

service
  .getIdentityManagerApiRestService()
  .getAuthenticationConfiguration()
  .pipe(switchMap((res) => res.authenticationConfiguration))
  .subscribe((config) => {
    return new PublicClientApplication({
      auth: config,
      cache: {
        cacheLocation: BrowserCacheLocation.LocalStorage,
        storeAuthStateInCookie: isIE, // set to true for IE 11. Remove this line to use Angular Universal
      },
    });
  });

Answer 2

我相信您的getAuthenticationConfiguration()應該看起來像這樣以從中返回一些響應：

 getAuthenticationConfiguration() { return authenticationConfiguration$.pipe(map(data) => data.authenticationConfiguration)) }

當你訂閱它時，你可以這樣做：

 service.getIdentityManagerApiRestService().getAuthenticationConfiguration().subscribe(response => { if(response.authenticationConfiguration) { return new PublicClientApplication({ auth: response.authenticationConfiguration, cache: { cacheLocation: BrowserCacheLocation.LocalStorage, storeAuthStateInCookie: isIE, } }); } })

所以基本上你可以在響應中為預期的屬性添加一個響應檢查，一旦收到然后只做進一步的代碼執行。