Angular5 HttpInterceptor depending on the result of an Observable
问题 I am trying to implement using Angular5 an HttpInterceptor to inject an Authorization header in all HTTP requests. I rely on a third party library (ADAL, here called AuthService ) that exposes a acquireToken() method to get the token to be used for Bearer authorization. The problem is that aquireToken() returns an observable, and i have to subscribe to get the real string I need. Therefore, my code never injects the header, i suppose because next.handle() is executed before acquireToken()