修复utils.DumpResponse()可能会忽略err的问题

internal/utils/http.go

@@ -16,6 +16,9 @@ var timeoutClientLocker = sync.Mutex{}
 // DumpResponse 导出响应
 func DumpResponse(resp *http.Response) (header []byte, body []byte, err error) {
 	header, err = httputil.DumpResponse(resp, false)
+	if err != nil {
+		return
+	}
 	body, err = ioutil.ReadAll(resp.Body)
 	return
 }