title: Intercept incoming HTTP request
body: <p>I am working on application which uses SSO for authentication. Our Angular 5 application is deployed on IIS server. So whenever user enters URL we are redirecting them to SSO login page from IIS server, then they will authenticate themselves and be redirected to actual application home page. Here we want to capture/intercept few header information of HTTP request when it redirected to home page of the application.</p>
  
  <p>I have gone through HttpInterceptor in Angular 5, where it is given that interceptors will transform the outgoing request. it is there any possibility to intercept incoming request?</p>