Utilised json.Unmarshal instead of json.NewDecoder

client.go

@@ -8,7 +8,7 @@ import (
 	"context"
 	"crypto/tls"
 	"encoding/json"
-	"io"
+	"io/ioutil"
 	"net"
 	"net/http"
 	"strconv"
@@ -183,8 +183,14 @@ func (c *Client) PushWithContext(ctx Context, n *Notification) (*Response, error
 	response.StatusCode = httpRes.StatusCode
 	response.ApnsID = httpRes.Header.Get("apns-id")
 
-	decoder := json.NewDecoder(httpRes.Body)
-	if err := decoder.Decode(response); err != nil && err != io.EOF {
+	data, err := ioutil.ReadAll(httpRes.Body)
+	if err != nil {
+		return nil, err
+	}
+	if len(data) == 0 {
+		return response, nil
+	}
+	if err := json.Unmarshal(data, response); err != nil {
 		return &Response{}, err
 	}
 	return response, nil