update response

go.mod

@@ -3,6 +3,7 @@ module github.com/luopengift/requests
 go 1.12
 
 require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/golang-io/pkg v0.0.0-20190424092429-486169a6c3e1
 	github.com/json-iterator/go v1.1.6 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect

go.sum

@@ -1,11 +1,15 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/golang-io/pkg v0.0.0-20190424092429-486169a6c3e1 h1:IIbIh1F/Rt98/cWBRiuBpt9NKHXXYFUuIzJtcVFmlP0=
 github.com/golang-io/pkg v0.0.0-20190424092429-486169a6c3e1/go.mod h1:ExL8XxxRpVHx5kKfsiJhlJfd15NcdlRlGUq301ceQ9g=
 github.com/json-iterator/go v1.1.6 h1:MrUvLMLTMxbqFJ9kzlvat/rYZqZnW3u4wkLzWTaFwKs=
 github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
+github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
+github.com/modern-go/reflect2 v1.0.1 h1:9f412s+6RmYXLWZSEzVVgPGK7C2PphHj5RJrvfx9AWI=
 github.com/modern-go/reflect2 v1.0.1/go.mod h1:bx2lNnkwVCuqBIxFjflWJWanXIb3RllmbCylyMrvgv0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=

response.go

@@ -28,11 +28,11 @@ func newResponse() *Response {
 func (resp *Response) getBody() error {
 	var err error
 	resp.once.Do(func() {
-		if resp == nil {
+		if resp.Response == nil {
 			return
 		}
-		defer resp.Body.Close()
-		_, err = resp.body.ReadFrom(resp.Body)
+		defer resp.Response.Body.Close()
+		_, err = resp.body.ReadFrom(resp.Response.Body)
 	})
 	return err
 }