GO/Gin 使用自定义验证器 V8 V10

使用V8版本

package main
 
import (
	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
	"gopkg.in/go-playground/validator.v8"
	"net/http"
	"reflect"
	"time"
)
 
//binding 绑定一些验证请求参数,自定义标签bookabledate表示可预约的时期
type Booking struct {
	CheckIn  time.Time `form:"check_in" binding:"required,bookabledate" time_format:"2006-01-02"`
	CheckOut time.Time `form:"check_out" binding:"required,gtfield=CheckOut,bookabledate" time_format:"2006-01-02"`
}
 
 
//定义bookabledate标签对应的验证方法
func bookableDate(
	v *validator.Validate, topStruct reflect.Value, currentStructOrField reflect.Value,
	field reflect.Value, fieldType reflect.Type, fieldKind reflect.Kind, param string,
) bool {
	if date, ok := field.Interface().(time.Time); ok {
		today := time.Now()
 
		if  date.Unix() > today.Unix() {
			return true
		}
	}
	return false
}
 
 
func main() {
	route := gin.Default()
 
        //将验证方法注册到验证器中
	if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
		v.RegisterValidation("bookabledate", bookableDate)
	}
 
	route.GET("/bookable", getBookable)
	route.Run(":8080")
}
 
func getBookable(c *gin.Context) {
	var b Booking
	if err := c.ShouldBindWith(&b, binding.Query); err == nil {
		c.JSON(http.StatusOK, gin.H{"message": "Booking dates are valid!"})
	} else {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
	}
}

使用V10版本

package main

import (
	. "awesomeProject/start/src"
	 "github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
	"github.com/go-playground/validator/v10"
)
func main()  {
	r := gin.Default()

	if v, ok := binding.Validator.Engine().(*validator.Validate); ok{
		v.RegisterValidation("topicurl", TopicUrl)
	}


}

type Topic struct {
	TopicUrl string `json:"url" binding:"omitempty,topicurl"`
}



func TopicUrl(fl validator.FieldLevel) bool {
	if  url,ok:=fl.Field().Interface().(string);ok{

		if matched,_ := regexp.MatchString(`\w{4,10}`,url); matched{
			return true
		}
	}
	return false
}