254 lines
7.9 KiB
Go
254 lines
7.9 KiB
Go
package validator
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import (
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"fmt"
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"strings"
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"sync"
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"tyapi-server/internal/shared/interfaces"
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"github.com/gin-gonic/gin"
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"github.com/gin-gonic/gin/binding"
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"github.com/go-playground/locales/zh"
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ut "github.com/go-playground/universal-translator"
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"github.com/go-playground/validator/v10"
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zh_translations "github.com/go-playground/validator/v10/translations/zh"
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)
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// 全局变量声明
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var (
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globalValidator *validator.Validate
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globalTranslator ut.Translator
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once sync.Once
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)
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// InitGlobalValidator 初始化全局校验器（线程安全）
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func InitGlobalValidator() {
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once.Do(func() {
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// 1. 创建新的校验器实例
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globalValidator = validator.New()
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// 2. 创建中文翻译器
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zhLocale := zh.New()
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uni := ut.New(zhLocale, zhLocale)
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globalTranslator, _ = uni.GetTranslator("zh")
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// 3. 注册官方中文翻译
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zh_translations.RegisterDefaultTranslations(globalValidator, globalTranslator)
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// 4. 注册自定义校验规则
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RegisterCustomValidators(globalValidator)
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// 5. 注册自定义中文翻译
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RegisterCustomTranslations(globalValidator, globalTranslator)
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// 6. 设置到Gin全局校验器（确保Gin使用我们的校验器）
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if binding.Validator.Engine() != nil {
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// 如果Gin已经初始化，则替换其校验器
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ginValidator := binding.Validator.Engine().(*validator.Validate)
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*ginValidator = *globalValidator
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}
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})
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}
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// GetGlobalValidator 获取全局校验器实例
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func GetGlobalValidator() *validator.Validate {
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if globalValidator == nil {
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InitGlobalValidator()
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}
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return globalValidator
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}
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// GetGlobalTranslator 获取全局翻译器实例
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func GetGlobalTranslator() ut.Translator {
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if globalTranslator == nil {
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InitGlobalValidator()
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}
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return globalTranslator
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}
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// RequestValidator HTTP请求验证器
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type RequestValidator struct {
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response interfaces.ResponseBuilder
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translator ut.Translator
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validator *validator.Validate
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}
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// NewRequestValidator 创建HTTP请求验证器
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func NewRequestValidator(response interfaces.ResponseBuilder) interfaces.RequestValidator {
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// 确保全局校验器已初始化
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InitGlobalValidator()
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return &RequestValidator{
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response: response,
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translator: globalTranslator, // 使用全局翻译器
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validator: globalValidator, // 使用全局校验器
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}
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}
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// Validate 验证请求体
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func (v *RequestValidator) Validate(c *gin.Context, dto interface{}) error {
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return v.BindAndValidate(c, dto)
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}
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// ValidateQuery 验证查询参数
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func (v *RequestValidator) ValidateQuery(c *gin.Context, dto interface{}) error {
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if err := c.ShouldBindQuery(dto); err != nil {
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if validationErrors, ok := err.(validator.ValidationErrors); ok {
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validationErrorsMap := v.formatValidationErrors(validationErrors)
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v.response.ValidationError(c, validationErrorsMap)
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} else {
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v.response.BadRequest(c, "查询参数格式错误")
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}
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return err
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}
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return nil
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}
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// ValidateParam 验证路径参数
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func (v *RequestValidator) ValidateParam(c *gin.Context, dto interface{}) error {
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if err := c.ShouldBindUri(dto); err != nil {
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if validationErrors, ok := err.(validator.ValidationErrors); ok {
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validationErrorsMap := v.formatValidationErrors(validationErrors)
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v.response.ValidationError(c, validationErrorsMap)
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} else {
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v.response.BadRequest(c, "路径参数格式错误")
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}
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return err
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}
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return nil
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}
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// BindAndValidate 绑定并验证请求
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func (v *RequestValidator) BindAndValidate(c *gin.Context, dto interface{}) error {
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if err := c.ShouldBindJSON(dto); err != nil {
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if validationErrors, ok := err.(validator.ValidationErrors); ok {
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validationErrorsMap := v.formatValidationErrors(validationErrors)
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v.response.ValidationError(c, validationErrorsMap)
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} else {
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v.response.BadRequest(c, "请求体格式错误")
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}
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return err
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}
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return nil
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}
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// formatValidationErrors 格式化验证错误
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func (v *RequestValidator) formatValidationErrors(validationErrors validator.ValidationErrors) map[string][]string {
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errors := make(map[string][]string)
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for _, fieldError := range validationErrors {
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fieldName := v.getFieldName(fieldError)
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errorMessage := v.getErrorMessage(fieldError)
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if _, exists := errors[fieldName]; !exists {
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errors[fieldName] = []string{}
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}
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errors[fieldName] = append(errors[fieldName], errorMessage)
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}
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return errors
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}
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// getErrorMessage 获取错误消息
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func (v *RequestValidator) getErrorMessage(fieldError validator.FieldError) string {
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fieldDisplayName := getFieldDisplayName(fieldError.Field())
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// 优先使用翻译器
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errorMessage := fieldError.Translate(v.translator)
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if errorMessage != fieldError.Error() {
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// 替换字段名为中文
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if fieldDisplayName != fieldError.Field() {
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errorMessage = strings.ReplaceAll(errorMessage, fieldError.Field(), fieldDisplayName)
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}
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return errorMessage
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}
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// 回退到手动翻译
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return v.getFallbackErrorMessage(fieldError, fieldDisplayName)
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}
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// getFallbackErrorMessage 获取回退错误消息
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func (v *RequestValidator) getFallbackErrorMessage(fieldError validator.FieldError, fieldDisplayName string) string {
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tag := fieldError.Tag()
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param := fieldError.Param()
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switch tag {
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case "required":
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return fmt.Sprintf("%s不能为空", fieldDisplayName)
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case "email":
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return fmt.Sprintf("%s必须是有效的邮箱地址", fieldDisplayName)
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case "min":
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return fmt.Sprintf("%s长度不能少于%s位", fieldDisplayName, param)
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case "max":
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return fmt.Sprintf("%s长度不能超过%s位", fieldDisplayName, param)
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case "len":
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return fmt.Sprintf("%s长度必须为%s位", fieldDisplayName, param)
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case "eqfield":
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paramDisplayName := getFieldDisplayName(param)
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return fmt.Sprintf("%s必须与%s一致", fieldDisplayName, paramDisplayName)
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case "phone":
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return fmt.Sprintf("%s必须是有效的手机号", fieldDisplayName)
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case "username":
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return fmt.Sprintf("%s格式不正确，只能包含字母、数字、下划线，且必须以字母开头，长度3-20位", fieldDisplayName)
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case "strong_password":
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return fmt.Sprintf("%s强度不足，必须包含大小写字母和数字，且不少于8位", fieldDisplayName)
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case "social_credit_code":
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return fmt.Sprintf("%s格式不正确，必须是18位统一社会信用代码", fieldDisplayName)
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case "id_card":
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return fmt.Sprintf("%s格式不正确，必须是18位身份证号", fieldDisplayName)
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case "price":
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return fmt.Sprintf("%s必须是非负数", fieldDisplayName)
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case "sort_order":
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return fmt.Sprintf("%s必须是 asc 或 desc", fieldDisplayName)
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case "product_code":
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return fmt.Sprintf("%s格式不正确，只能包含字母、数字、下划线、连字符、中英文括号，长度3-50位", fieldDisplayName)
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case "uuid":
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return fmt.Sprintf("%s必须是有效的UUID格式", fieldDisplayName)
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case "url":
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return fmt.Sprintf("%s必须是有效的URL地址", fieldDisplayName)
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case "oneof":
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return fmt.Sprintf("%s必须是以下值之一: %s", fieldDisplayName, param)
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case "gt":
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return fmt.Sprintf("%s必须大于%s", fieldDisplayName, param)
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default:
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return fmt.Sprintf("%s格式不正确", fieldDisplayName)
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}
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}
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// getFieldName 获取字段名
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func (v *RequestValidator) getFieldName(fieldError validator.FieldError) string {
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fieldName := fieldError.Field()
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return v.toSnakeCase(fieldName)
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}
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// toSnakeCase 转换为snake_case
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func (v *RequestValidator) toSnakeCase(str string) string {
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var result strings.Builder
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for i, r := range str {
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if i > 0 && (r >= 'A' && r <= 'Z') {
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result.WriteRune('_')
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}
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result.WriteRune(r)
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}
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return strings.ToLower(result.String())
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}
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// GetValidator 获取validator实例（用于业务逻辑）
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func (v *RequestValidator) GetValidator() *validator.Validate {
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return v.validator
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}
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// ValidateValue 验证单个值（用于业务逻辑）
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func (v *RequestValidator) ValidateValue(field interface{}, tag string) error {
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return v.validator.Var(field, tag)
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}
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// ValidateStruct 验证结构体（用于业务逻辑）
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func (v *RequestValidator) ValidateStruct(s interface{}) error {
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return v.validator.Struct(s)
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}
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