Angular HTTP Interceptor how to chain an observable
问题 I am using the Azure AD adal library to do authentication. There is a call to aquire a token that returns an observable. How can this observable be added into the intercept? In the below example, how can I get the request that is set inside the subscribe to be returned as the Observable? intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> { this.authAzureService.getAccessToken() .subscribe(token => { // I need this to be returned request = this