From 3286654213623ad7318afe24658b3bfe5f56c0d6 Mon Sep 17 00:00:00 2001
From: Olivier Benz <olivier.benz@b-data.ch>
Date: Mon, 21 Nov 2022 16:50:38 +0100
Subject: [PATCH] backport #3410 to v1.2

---
 src/command/preview/preview.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/command/preview/preview.ts b/src/command/preview/preview.ts
index a0b226bfaf..d8d6ccb3df 100644
--- a/src/command/preview/preview.ts
+++ b/src/command/preview/preview.ts
@@ -72,6 +72,8 @@ import {
   isJupyterHubServer,
   isRStudioServer,
   isRStudioWorkbench,
+  isVSCodeServer,
+  vsCodeServerProxyUri,
 } from "../../core/platform.ts";
 import { isJupyterNotebook } from "../../core/jupyter/jupyter.ts";
 import { watchForFileChanges } from "../../core/watch.ts";
@@ -690,6 +692,9 @@ function pdfFileRequestHandler(
       if (new URL(req.url).pathname === "/") {
         const url = isRStudioWorkbench()
           ? await rswURL(port, kPdfJsInitialPath)
+          : isVSCodeServer()
+          ? vsCodeServerProxyUri()!.replace("{{port}}", `${port}`)
+            + kPdfJsInitialPath
           : "/" + kPdfJsInitialPath;
         return Promise.resolve(serveRedirect(url));
       } else {