From 620f31d6a6900e4739b3b1605af1a1ce5927df49 Mon Sep 17 00:00:00 2001
From: Alf Eaton <alf.eaton@overleaf.com>
Date: Thu, 17 Oct 2024 14:29:13 +0100
Subject: [PATCH] Restore singleton pdfCachingTransportFactory (#21194)

GitOrigin-RevId: 3c1d71ba4fdd07f0774534fbe3a99b2d47dfa962
---
 .../frontend/js/features/pdf-preview/util/pdf-js-wrapper.ts  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.ts b/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.ts
index c5c57a52ae..40df51f073 100644
--- a/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.ts
+++ b/services/web/frontend/js/features/pdf-preview/util/pdf-js-wrapper.ts
@@ -18,6 +18,7 @@ export default class PDFJSWrapper {
   public readonly viewer: PDFViewer
   public readonly eventBus: EventBus
   private readonly linkService: PDFLinkService
+  private readonly pdfCachingTransportFactory: any
 
   // eslint-disable-next-line no-useless-constructor
   constructor(public container: HTMLDivElement) {
@@ -43,6 +44,8 @@ export default class PDFJSWrapper {
     })
 
     this.linkService.setViewer(this.viewer)
+
+    this.pdfCachingTransportFactory = generatePdfCachingTransportFactory()
   }
 
   // load a document from a URL
@@ -64,7 +67,7 @@ export default class PDFJSWrapper {
     }
 
     return new Promise<PDFJS.PDFDocumentProxy>((resolve, reject) => {
-      const rangeTransport = generatePdfCachingTransportFactory()({
+      const rangeTransport = this.pdfCachingTransportFactory({
         url,
         pdfFile,
         abortController,