第一种方式，使用类型形式构建HTTP中间件，结构myHandler有个属性是http.Handler类型，这个类型有个ServeHTTP方法
package mainimport ( "fmt" "net/http")type myHandler struct { Addrhost string Headler http.Handler}func (this *myHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { this.Headler.ServeHTTP(w, r)}func HandlerFunc(w http.ResponseWriter, r *http.Request) { fmt.Println(r.Host) w.Write([]byte("你好世界"))}func main() { my := &myHandler{ Headler: http.HandlerFunc(HandlerFunc), Addrhost: ":8080", } http.ListenAndServe(":8080", my)}
第二种方式，函数方式
package mainimport ( "fmt" "net/http")func gethandler(addhost string, headler http.Handler) http.Handler { fn := func(w http.ResponseWriter, r *http.Request) { fmt.Println(r.Host) headler.ServeHTTP(w, r) } return http.HandlerFunc(fn)}func myhandler(w http.ResponseWriter, r *http.Request) { w.Write([]byte("你好世界"))}func main() { hd := gethandler(":8080", http.HandlerFunc(myhandler)) http.ListenAndServe(":8080", hd)}