【golang】封装ShouldBind错误

package v1

import (
	"mall/pkg/util"
	"mall/service"
	"net/http"

	"github.com/gin-gonic/gin"
)

// handler 绑定路由的一个方法
func UserRegister(c *gin.Context) {
	var userRegister service.UserService
	if err := c.ShouldBind(&userRegister); err == nil {
		res := userRegister.Register(c.Request.Context())
		c.JSON(http.StatusOK, res)
	} else {
		c.JSON(http.StatusBadRequest, ErrorResponse(err))
	}
}

package v1

import (
	"encoding/json"
	"mall/serializer"
)
func ErrorResponse(err error) serializer.Response{
	if _,ok:=err.(*json.UnmarshalTypeError);ok{
		return serializer.Response{
			Status: 400,
			Msg: "JSON类型不匹配",
			Error: err.Error(),
		}
	}
	return serializer.Response{
		Status: 400,
		Msg: "参数错误",
		Error: err.Error(),
	}
}

package serializer

// 定义序列化返回结构体
type Response struct {
	Status int         `json:"status"`
	Data   interface{} `json:"data"`
	Msg    string      `json:"msg"`
	Error  string      `json:"error"`
}