client := api.New("http://127.0.0.1/api")

// set header
api.SetHeader("Host", "api.host")

// Get
params, err := url.ParseQuery("a=1&b=2")

// data []byte
data, err := api.Get("hello", params)

api.Trace(func(req *http.Request, b []byte, status int, e error){
    // you can write log here... if e not nil
})