From 468d5c4d65355d3e1f19d59b33f13438c1a6addf Mon Sep 17 00:00:00 2001
From: RPRX <63339210+RPRX@users.noreply.github.com>
Date: Sun, 21 Jul 2024 20:13:20 +0000
Subject: [PATCH] Fix SplitHTTP H3 waited for downResponse before uploading

https://github.com/XTLS/Xray-core/issues/3560#issuecomment-2241750579
---
 transport/internet/splithttp/client.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/transport/internet/splithttp/client.go b/transport/internet/splithttp/client.go
index 2a467d7dab93..0cdaf247e9ff 100644
--- a/transport/internet/splithttp/client.go
+++ b/transport/internet/splithttp/client.go
@@ -9,6 +9,7 @@ import (
 	"net/http/httptrace"
 	"sync"
 
+	"github.com/quic-go/quic-go/http3"
 	"github.com/xtls/xray-core/common"
 	"github.com/xtls/xray-core/common/errors"
 	"github.com/xtls/xray-core/common/net"
@@ -94,6 +95,10 @@ func (c *DefaultDialerClient) OpenDownload(ctx context.Context, baseURL string)
 		gotDownResponse.Close()
 	}()
 
+	if _, h3 := c.download.Transport.(*http3.RoundTripper); h3 {
+		gotConn.Close()
+	}
+
 	// we want to block Dial until we know the remote address of the server,
 	// for logging purposes
 	<-gotConn.Wait()