From 95093a5276d9e627717aa25411284727f312fad5 Mon Sep 17 00:00:00 2001
From: Christian Myksvoll <christian@myksvoll.com>
Date: Thu, 13 Jul 2017 22:48:04 +0200
Subject: [PATCH] Check for undefined url (#8640)

* Check for undefined

new URL(file, window.location.href) throws the following error in IE11 + iPad Safari:
Unable to get property 'replace' of undefined or null reference

* Adapting previous change to pdf.js code standards

Added curly braces

* Moved check for undefined above try/catch
---
 web/app.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/web/app.js b/web/app.js
index ff7e5d912..66bacb9a5 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1403,6 +1403,9 @@ if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
   const HOSTED_VIEWER_ORIGINS = ['null',
     'http://mozilla.github.io', 'https://mozilla.github.io'];
   validateFileURL = function validateFileURL(file) {
+    if (file === undefined) {
+      return;
+    }
     try {
       let viewerOrigin = new URL(window.location.href).origin || 'null';
       if (HOSTED_VIEWER_ORIGINS.indexOf(viewerOrigin) >= 0) {