diff --git a/client.go b/client.go
index 2de29aa..b2e3bbe 100644
--- a/client.go
+++ b/client.go
@@ -20,46 +20,49 @@ func NewClient() *Client {
 	}}
 }
 
-func (this *Client) getTransport() *http.Transport {
-	return this.cli.Transport.(*http.Transport)
+func (c *Client) getTransport() *http.Transport {
+	return c.cli.Transport.(*http.Transport)
 }
 
-func (this *Client) SetTimeOut(d time.Duration) *Client {
-	this.cli.Timeout = d
-	return this
+func (c *Client) SetTimeOut(d time.Duration) *Client {
+	c.cli.Timeout = d
+	return c
 }
 
-func (this *Client) SetTransport(transport *http.Transport) *Client {
-	this.cli.Transport = transport
-	return this
+// SetTransport
+// if you used SetTransport after SetTimeOut or SetProxyURL,
+// SetTimeOut/SetProxyURL will be invalid
+func (c *Client) SetTransport(transport *http.Transport) *Client {
+	c.cli.Transport = transport
+	return c
 }
 
-func (this *Client) SetProxyURL(url string) *Client {
+func (c *Client) SetProxyURL(url string) *Client {
 	urlProxy, err := neturl.Parse(url)
 	if err != nil {
 		panic(err)
 	}
-	this.getTransport().Proxy = http.ProxyURL(urlProxy)
-	return this
+	c.getTransport().Proxy = http.ProxyURL(urlProxy)
+	return c
 }
 
-func (this *Client) SetInsecureSkipVerify(skip bool) *Client {
-	this.getTransport().TLSClientConfig = &tls.Config{InsecureSkipVerify: skip}
-	return this
+func (c *Client) SetInsecureSkipVerify(skip bool) *Client {
+	c.getTransport().TLSClientConfig = &tls.Config{InsecureSkipVerify: skip}
+	return c
 }
 
-func (this *Client) Get(url string) *Request {
-	return NewRequest(Method_GET, url).SetClient(this.cli)
+func (c *Client) Get(url string) *Request {
+	return NewRequest(Method_GET, url).SetClient(c.cli)
 }
 
-func (this *Client) Post(url string) *Request {
-	return NewRequest(Method_POST, url).SetClient(this.cli)
+func (c *Client) Post(url string) *Request {
+	return NewRequest(Method_POST, url).SetClient(c.cli)
 }
 
-func (this *Client) Put(url string) *Request {
-	return NewRequest(Method_PUT, url).SetClient(this.cli)
+func (c *Client) Put(url string) *Request {
+	return NewRequest(Method_PUT, url).SetClient(c.cli)
 }
 
-func (this *Client) Delete(url string) *Request {
-	return NewRequest(Method_DELETE, url).SetClient(this.cli)
+func (c *Client) Delete(url string) *Request {
+	return NewRequest(Method_DELETE, url).SetClient(c.cli)
 }
diff --git a/response.go b/response.go
index caf0fff..c38bab1 100644
--- a/response.go
+++ b/response.go
@@ -1,6 +1,7 @@
 package hasaki
 
 import (
+	"bytes"
 	"io/ioutil"
 	"net/http"
 
@@ -8,6 +9,7 @@ import (
 	"github.com/pkg/errors"
 )
 
+// ErrorChecker if you need to decode the body, please use CloserWrapper to save the result
 type ErrorChecker func(resp *http.Response) error
 
 var DefaultErrorChecker ErrorChecker = func(resp *http.Response) error {
@@ -47,3 +49,13 @@ func (c *Response) BindJSON(v interface{}) error {
 	defer c.Body.Close()
 	return errors.WithStack(jsoniter.NewDecoder(c.Body).Decode(v))
 }
+
+type CloserWrapper []byte
+
+func (c *CloserWrapper) Read(p []byte) (n int, err error) {
+	return bytes.NewBuffer(*c).Read(p)
+}
+
+func (c *CloserWrapper) Close() error {
+	return nil
+}