From 0a252ac15d34e7c23a1d3807a89bfca51cbb559b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=A3=8E=E6=89=87=E6=BB=91=E7=BF=94=E7=BF=BC?=
 <Fangliding.fshxy@outlook.com>
Date: Thu, 21 Nov 2024 13:42:19 +0800
Subject: [PATCH] HTTP transport: Use dest as Host if not set (#4038)

---
 transport/internet/http/config.go | 2 +-
 transport/internet/http/dialer.go | 9 ++++++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/transport/internet/http/config.go b/transport/internet/http/config.go
index 989ed106..1cd7d058 100644
--- a/transport/internet/http/config.go
+++ b/transport/internet/http/config.go
@@ -8,7 +8,7 @@ import (
 
 func (c *Config) getHosts() []string {
 	if len(c.Host) == 0 {
-		return []string{"www.example.com"}
+		return []string{""}
 	}
 	return c.Host
 }
diff --git a/transport/internet/http/dialer.go b/transport/internet/http/dialer.go
index d0a86e8b..42a9f9b3 100644
--- a/transport/internet/http/dialer.go
+++ b/transport/internet/http/dialer.go
@@ -215,9 +215,16 @@ func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.Me
 		}
 	}
 
+	Host := httpSettings.getRandomHost()
+	if Host == "" && net.ParseAddress(dest.NetAddr()).Family().IsDomain() {
+		Host = dest.Address.String()
+	} else if Host == "" {
+		Host = "www.example.com"
+	}
+
 	request := &http.Request{
 		Method: httpMethod,
-		Host:   httpSettings.getRandomHost(),
+		Host:   Host,
 		Body:   breader,
 		URL: &url.URL{
 			Scheme: "https",