From a159bc811e3514bb2a5b300140e8e28faaa20e9f Mon Sep 17 00:00:00 2001
From: Dennis Holmer <dennis@zwapgrid.com>
Date: Wed, 28 Jul 2021 15:46:08 +0000
Subject: [PATCH] Add check for localStorage writeability

---
 projects/lib/src/oauth-service.ts | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/projects/lib/src/oauth-service.ts b/projects/lib/src/oauth-service.ts
index 9fe14465..7de75330 100644
--- a/projects/lib/src/oauth-service.ts
+++ b/projects/lib/src/oauth-service.ts
@@ -162,10 +162,7 @@ export class OAuthService extends AuthConfig implements OnDestroy {
     }
 
     // in IE, sessionStorage does not always survive a redirect
-    if (
-      typeof window !== 'undefined' &&
-      typeof window['localStorage'] !== 'undefined'
-    ) {
+    if (this.checkLocalStorageAccessable()) {
       const ua = window?.navigator?.userAgent;
       const msie = ua?.includes('MSIE ') || ua?.includes('Trident');
 
@@ -177,6 +174,23 @@ export class OAuthService extends AuthConfig implements OnDestroy {
     this.setupRefreshTimer();
   }
 
+  private checkLocalStorageAccessable(){
+    if(typeof window === 'undefined')
+      return false;
+
+    const test = 'test';
+    try {
+      if(typeof window['localStorage'] === 'undefined')
+        return false;
+
+      localStorage.setItem(test, test);
+      localStorage.removeItem(test);
+      return true;
+    } catch(e) {
+      return false;
+    }
+  }
+
   /**
    * Use this method to configure the service
    * @param config the configuration