From 99244c4e93f51c3181eb3aa6434aa38996083a8a Mon Sep 17 00:00:00 2001
From: Daniel Coelho <daniel.coelho@cgu.gov.br>
Date: Mon, 22 Sep 2025 08:25:06 -0300
Subject: [PATCH] SSR: avoid sending new response when headeras were already
 sent (fixes #2315)

(cherry picked from commit 951c5f69d46db57efb5423c4581b4c895793c6dd)
---
 server.ts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/server.ts b/server.ts
index 4ecedf956f..89428f9bd3 100644
--- a/server.ts
+++ b/server.ts
@@ -268,6 +268,12 @@ function serverSideRender(req, res, next, sendToUser: boolean = true) {
       ],
     })
     .then((html) => {
+      // If headers were already sent, then do nothing else, it is probably a
+      // redirect response
+      if (res.headersSent) {
+        return;
+      }
+
       if (hasValue(html)) {
         // Replace REST URL with UI URL
         if (environment.ssr.replaceRestUrl && REST_BASE_URL !== environment.rest.baseUrl) {