From ecdf585216db9c2870e92998f45d705fd2406509 Mon Sep 17 00:00:00 2001
From: Julius Gruber <julius.gruber@tuwien.ac.at>
Date: Thu, 6 Jun 2019 10:01:23 +0200
Subject: [PATCH] null check for auth interceptor

---
 src/app/core/auth/auth.interceptor.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/app/core/auth/auth.interceptor.ts b/src/app/core/auth/auth.interceptor.ts
index 8aa6f084ea..d9697d3f20 100644
--- a/src/app/core/auth/auth.interceptor.ts
+++ b/src/app/core/auth/auth.interceptor.ts
@@ -162,8 +162,10 @@ export class AuthInterceptor implements HttpInterceptor {
             // clean eventually refresh Requests list
             this.refreshTokenRequestUrls = [];
             // console.log('error: ', error);
-            const location = this.getLocationfromHeader(error.headers);
-
+            let location = '';
+            if (error.headers.get('www-authenticate') != null) {
+              location = this.getLocationfromHeader(error.headers);
+            }
             // Create a new HttpResponse and return it, so it can be handle properly by AuthService.
             const authResponse = new HttpResponse({
               body: this.makeAuthStatusObject(false, null, error.error, location),