From bb0b480d2ab3108a8ae255b539015da451fdb249 Mon Sep 17 00:00:00 2001
From: Ihor Machuzhak <ihorma@wix.com>
Date: Wed, 30 Apr 2025 16:48:56 +0300
Subject: [PATCH] fix(sio): improve `io.close()` function (#5344)

Before this change, `await io.close();` would resolve before the HTTP server was properly shut down.

Related: https://github.com/socketio/socket.io/pull/4971
---
 packages/socket.io/lib/index.ts | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/socket.io/lib/index.ts b/packages/socket.io/lib/index.ts
index 5653911b..e5ea69d1 100644
--- a/packages/socket.io/lib/index.ts
+++ b/packages/socket.io/lib/index.ts
@@ -831,7 +831,16 @@ export class Server<
     restoreAdapter();
 
     if (this.httpServer) {
-      this.httpServer.close(fn);
+      await new Promise<void>((resolve, reject) => {
+        this.httpServer.close((err) => {
+          fn && fn(err);
+          if (err) {
+            reject(err);
+          } else {
+            resolve();
+          }
+        });
+      });
     } else {
       fn && fn();
     }