Update ch5-03-middleware.md

修复5.3.3 示例代码 nil map panic: assignment to entry in nil map
chai2010 · Apr 8, 2021 · 0c87b96 · 0c87b96
1 parent d55969d
commit 0c87b96
Showing 1 changed file with 4 additions and 2 deletions.
diff --git a/ch5-web/ch5-03-middleware.md b/ch5-web/ch5-03-middleware.md
@@ -233,8 +233,10 @@ type Router struct {
 	mux map[string] http.Handler
 }
 
-func NewRouter() *Router{
-	return &Router{}
+func NewRouter() *Router {
+	return &Router{
+		mux: make(map[string]http.Handler),
+	}
 }
 
 func (r *Router) Use(m middleware) {