From 0f0f1188271bf1f8f36cd5aef0a87a4c95a73df8 Mon Sep 17 00:00:00 2001
From: WofWca <wofwca@protonmail.com>
Date: Thu, 5 Sep 2024 15:34:36 +0400
Subject: [PATCH] improvement(proxy): don't panic on invalid relayURL

Though prior to this change the panic could only happen
if the default relayURL set by the proxy is invalid,
since `datachannelHandler` is only called after a succesful
`checkIsRelayURLAcceptable()`, which ensures that it _is_ valid.
But in the case of invalid default relay URL, a warning is printed
already.
---
 proxy/lib/snowflake.go | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/proxy/lib/snowflake.go b/proxy/lib/snowflake.go
index f168ec0..809a6cb 100644
--- a/proxy/lib/snowflake.go
+++ b/proxy/lib/snowflake.go
@@ -360,7 +360,8 @@ func (sf *SnowflakeProxy) datachannelHandler(conn *webRTCConn, remoteAddr net.Ad
 
 	u, err := url.Parse(relayURL)
 	if err != nil {
-		log.Fatalf("invalid relay url: %s", err)
+		log.Printf("invalid relay url: %s", err)
+		return
 	}
 
 	if remoteAddr != nil {