From 2529fa6e7e7ff903097b3ed5b87d73b51105a7b4 Mon Sep 17 00:00:00 2001
From: bill2004158 <bill2004158@gmail.com>
Date: Sat, 18 Jul 2020 16:38:04 +0800
Subject: [PATCH] Update RCTSRWebSocket.m

Only add Sec-WebSocket-Protocol header if has _requestedProtocols.
---
 Libraries/WebSocket/RCTSRWebSocket.m | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Libraries/WebSocket/RCTSRWebSocket.m b/Libraries/WebSocket/RCTSRWebSocket.m
index b967c14173d6..8ce6edc4dae2 100644
--- a/Libraries/WebSocket/RCTSRWebSocket.m
+++ b/Libraries/WebSocket/RCTSRWebSocket.m
@@ -462,7 +462,7 @@ - (void)didConnect
 
   CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Origin"), (__bridge CFStringRef)_url.RCTSR_origin);
 
-  if (_requestedProtocols) {
+  if (_requestedProtocols && _requestedProtocols.count > 0) {
     CFHTTPMessageSetHeaderFieldValue(request, CFSTR("Sec-WebSocket-Protocol"), (__bridge CFStringRef)[_requestedProtocols componentsJoinedByString:@", "]);
   }