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| package main
import (
"errors"
"fmt"
"github.com/gin-gonic/gin"
"github.com/gin-gonic/gin/binding"
"github.com/go-playground/validator/v10"
"net/http"
"reflect"
"strings"
)
type Body struct {
Name string `json:"name" binding:"oneof=vk vksir" err:"one of vk,vksir"`
Age int `json:"age" binding:"BodyAgeValidate" err:"only 18"`
}
func BodyAgeValidate(f validator.FieldLevel) bool {
value := f.Field().Int()
if value != 18 {
return false
}
return true
}
func GetValidateErr(obj any, rawErr error) error {
validationErrs, ok := rawErr.(validator.ValidationErrors)
if !ok {
return rawErr
}
var errString []string
for _, validationErr := range validationErrs {
field, ok := reflect.TypeOf(obj).FieldByName(validationErr.Field())
if ok {
if e := field.Tag.Get("err"); e != "" {
errString = append(errString, fmt.Sprintf("%s: %s", validationErr.Namespace(), e))
continue
}
}
errString = append(errString, validationErr.Error())
}
return errors.New(strings.Join(errString, "\n"))
}
func ping(c *gin.Context) {
b := Body{}
if err := c.ShouldBindJSON(&b); err != nil {
c.JSON(http.StatusBadRequest, gin.H{"detail": GetValidateErr(b, err).Error()})
return
}
c.JSON(http.StatusOK, gin.H{})
}
func main() {
e := gin.Default()
if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
v.RegisterValidation("BodyAgeValidate", BodyAgeValidate)
}
e.GET("/ping", ping)
e.Run("127.0.0.1:8080")
}
|