From 3698e5f7fe8e82a0b1edfcc36e4aea3c0824a43e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lucas=20L=C3=B6ffel?= <lucas@loeffel.io>
Date: Tue, 9 Oct 2018 12:26:46 +0200
Subject: [PATCH] added lock to fix concurrency issue

---
 recws.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/recws.go b/recws.go
index 0235d43..aaf3d69 100644
--- a/recws.go
+++ b/recws.go
@@ -141,9 +141,13 @@ func (rc *RecConn) ReadJSON(v interface{}) error {
 // (Cookie). Use GetHTTPResponse() method for the response.Header to get
 // the selected subprotocol (Sec-WebSocket-Protocol) and cookies (Set-Cookie).
 func (rc *RecConn) Dial(urlStr string, reqHeader http.Header) {
+	rc.mu.Lock()
+	defer rc.mu.Unlock()
+
 	if urlStr == "" {
 		log.Fatal("Dial: Url cannot be empty")
 	}
+
 	u, err := url.Parse(urlStr)
 
 	if err != nil {