中间件示例

test/http.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"net/http"
+	"fmt"
+)
+
+// 中间件
+func logMiddle(next http.Handler) http.Handler{
+	return http.HandlerFunc(func(w http.ResponseWriter,r *http.Request){
+		fmt.Println("middle log")
+		next.ServeHTTP(w,r)
+	})
+}
+// 中间件2
+func hook(next http.Handler) http.Handler{
+	return http.HandlerFunc(func(w http.ResponseWriter,r *http.Request) {
+		fmt.Println("hook log",r.URL.Path)
+		next.ServeHTTP(w,r)
+	})
+}
+
+// 首页
+func index(w http.ResponseWriter,r *http.Request){
+	if r.URL.Path != "/"{
+		return
+	}
+	w.Write([]byte("hello"))
+	fmt.Println("index log")
+}
+
+func main() {
+
+	http.Handle("/api",logMiddle(hook(http.HandlerFunc(index))))
+	http.Handle("/",hook(http.HandlerFunc(index)))
+
+	http.ListenAndServe(":8000",nil)
+}