From 63f58037b932c1543798d79d49ce7e3c0bc55048 Mon Sep 17 00:00:00 2001
From: Marco Schumacher <marco@schumacher.dev>
Date: Thu, 13 Jun 2024 15:16:05 +0200
Subject: [PATCH] preserve Upgrade header end request in hijack mode

---
 lib/modem.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/modem.js b/lib/modem.js
index 6e60587..12d88f4 100644
--- a/lib/modem.js
+++ b/lib/modem.js
@@ -227,7 +227,7 @@ Modem.prototype.dial = function (options, callback) {
 
   if (options.hijack) {
     optionsf.headers.Connection = 'Upgrade';
-    optionsf.headers.Upgrade = 'tcp';
+    optionsf.headers.Upgrade ??= 'tcp';
   }
 
   if (this.socketPath) {
@@ -366,7 +366,7 @@ Modem.prototype.buildRequest = function (options, context, data, callback) {
     data.pipe(req);
   }
 
-  if (!context.hijack && !context.openStdin && (typeof data === 'string' || data === undefined || Buffer.isBuffer(data))) {
+  if (!context.openStdin && (typeof data === 'string' || data === undefined || Buffer.isBuffer(data))) {
     req.end();
   }
 };