Go-Gin はリクエスト本文を複数回読み取ります

func SignupValidator(c *gin.Context) {
    // Read the Body content
    // var bodyBytes []byte
    // if c.Request.Body != nil {
    //  bodyBytes, _ = ioutil.ReadAll(c.Request.Body)
    // }
    var user entity.User
    if err := c.ShouldBindJSON(&user); err != nil {
         validate := validator.New()
         if err := validate.Struct(&user); err != nil {
              c.JSON(http.StatusBadRequest, gin.H{
                 "error": err.Error(),
          })
          c.Abort()
          return
        }
        // c.Request.Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))
    }
    // Read the Body content
    var bodyBytes []byte
    if c.Request.Body != nil {
        bodyBytes, _ = ioutil.ReadAll(c.Request.Body)
    }
    fmt.Println(string(bodyBytes)) // this empty
    c.Next()

}