From 326c9785b4e251ae8b1eda847d3b5dec04506af0 Mon Sep 17 00:00:00 2001
From: Max Schmitt <max@schmitt.mx>
Date: Fri, 3 Nov 2023 17:38:55 +0100
Subject: [PATCH] fix(trace-viewer): keep searchParams on / redirect (#27956)

Relates to https://github.com/microsoft/playwright/issues/27952.

Might help future users too.
---
 .../playwright-core/src/server/trace/viewer/traceViewer.ts    | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/packages/playwright-core/src/server/trace/viewer/traceViewer.ts b/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
index 39a6c82c07..fa37a53be6 100644
--- a/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
+++ b/packages/playwright-core/src/server/trace/viewer/traceViewer.ts
@@ -119,9 +119,9 @@ async function startTraceViewerServer(traceUrls: string[], options?: OpenTraceVi
   const searchQuery = params.length ? '?' + params.join('&') : '';
   const urlPath  = `/trace/${app || 'index.html'}${searchQuery}`;
 
-  server.routePath('/', (_, response) => {
+  server.routePath('/', (request, response) => {
     response.statusCode = 302;
-    response.setHeader('Location', urlPath);
+    response.setHeader('Location', urlPath + request.url!.substring(1));
     response.end();
     return true;
   });