From f9d729012c9d6f2cb04aae4d86af86c5b188a150 Mon Sep 17 00:00:00 2001
From: Sebastian Rettig <serettig@posteo.de>
Date: Tue, 13 Jul 2021 07:48:15 +0200
Subject: [PATCH] fix(h5p-exporter): already internalized URLs are kept as they
 are

---
 packages/h5p-html-exporter/src/HtmlExporter.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/packages/h5p-html-exporter/src/HtmlExporter.ts b/packages/h5p-html-exporter/src/HtmlExporter.ts
index 8f7354c79..dee7674bc 100644
--- a/packages/h5p-html-exporter/src/HtmlExporter.ts
+++ b/packages/h5p-html-exporter/src/HtmlExporter.ts
@@ -728,6 +728,10 @@ export default class HtmlExporter {
         core: boolean,
         usedFiles: LibrariesFilesList
     ) => async (asset) => {
+        // If a url already is internalized we simply return it
+        if (asset.url.startsWith('data:') && asset.url.includes('base64')) {
+            return asset.url;
+        }
         const mimetype = mimetypes.lookup(path.extname(asset.relativePath));
 
         if (library) {