如何验证来自中间件 go-gin 的数据

Question

尝试学习 golang，我迷失在验证中间件中使用context.Request.Body它struct

简要介绍它们如何相互连接，在此先感谢您的帮助

我的中间件

package validations

import (

    "github.com/bihire/ikaze_server_app/entity"

    "net/http"

    "github.com/gin-gonic/gin"

    "github.com/go-playground/validator/v10"

)

func SignupValidator(c *gin.Context) {

    // user := c.Request.Body

    var user entity.User

    validate := validator.New()

    if err := validate.Struct(&user); err != nil {

        c.JSON(http.StatusBadRequest, gin.H{

            "error": err.Error(),

        })

    }

}

我的结构

package entity

type User struct {

    Username         string `json:"username" validate:"required"`

    Email            string `json:"email"  validate:"email"`

    Password         string `json:"password" validate:"min=8,max=32,alphanum"`

    ConfirmPassword  string `json:"confirm_password" validate:"eqfield=Password,required"`

}

返回响应错误

{

    "error": "Key: 'User.Username' Error:Field validation for 'Username' failed on the 'required' tag\nKey: 'User.Email' Error:Field validation for 'Email' failed on the 'email' tag\nKey: 'User.Password' Error:Field validation for 'Password' failed on the 'min' tag\nKey: 'User.ConfirmPassword' Error:Field validation for 'ConfirmPassword' failed on the 'required' tag"

}{

    "username": "bihire",

    "email": "[e-mail]",

    "password": "password",

    "confirm_password": "password"

}

带中间件的路由器

auth.POST("login", gin.Logger(), validations.SignupValidator, func(ctx *gin.Context) {

            ctx.JSON(200, videoController.Save(ctx))

        })

Answer 1

看起来你错过了return：func SignupValidator(c *gin.Context) gin.HandlerFunc {    return func(c *gin.Context) {       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.Next()    }}请注意，c.Abort()如果验证失败，我们会调用。这是因为 gin 调用链中的下一个函数，即使在您c.JSON()使用c.Next().