core: improve messaging on flow_manager, authenticate user when they linked their account after not having been authenticateed

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/web/web_proxy.go

@@ -11,6 +11,7 @@ func (ws *WebServer) configureProxy() {
 	u, _ := url.Parse("http://localhost:8000")
 	rp := httputil.NewSingleHostReverseProxy(u)
 	rp.ErrorHandler = ws.proxyErrorHandler
+	rp.ModifyResponse = ws.proxyModifyResponse
 	ws.m.PathPrefix("/").Handler(rp)
 }
 
@@ -18,3 +19,8 @@ func (ws *WebServer) proxyErrorHandler(rw http.ResponseWriter, req *http.Request
 	ws.log.WithError(err).Warning("proxy error")
 	rw.WriteHeader(http.StatusBadGateway)
 }
+
+func (ws *WebServer) proxyModifyResponse(r *http.Response) error {
+	r.Header.Set("X-authentik-from", "authentik")
+	return nil
+}