当asp.net core偶遇docker一（模型验证和Rabbitmq 三）

继续上一篇

上一篇，从core方式实现了一个Rabbitmq发送队列消息的接口，我们现在需要在模型验证里面加入验证失败就发送消息的部分

    [AttributeUsage(AttributeTargets.Class)]
    public class ValidateBaseAttribute:ValidationAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            return ValidationResult.Success;
        }
    }

这个验证特性打上之后，只要模型验证就触发

转到 ValidationContext 里面

在ValidateBaseAttribute内修改如下

   [AttributeUsage(AttributeTargets.Class)]
    public class ValidateBaseAttribute:ValidationAttribute
    {
        public Type Type { get; set; }
        public string FunName { get; set; }

        public ValidateBaseAttribute()
        {

        }

        public ValidateBaseAttribute(Type type, string funName)
        {
            Type = type;
            FunName = funName;
        }

        private bool ExecuteMethod(Type type, string funName,object value)
        {
            if (type == null || string.IsNullOrWhiteSpace(funName))
                return false;
            try
            {
                var instance = Activator.CreateInstance(type);
                var method = type.GetMethod(funName);
                return (bool)method.Invoke(instance, new[] { value });
            }
            catch
            {
                return false;
            }
        }

        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            var validate = ExecuteMethod(Type, FunName, value);
            if (validate)
            {
                var remoteSend = validationContext.GetService(typeof(IRemoteSend)) as IRemoteSend;
                if (remoteSend != null)
                {
                    remoteSend.Send(value);
                    return new ValidationResult("验证失败");
                }
            }
            return ValidationResult.Success;
        }
    }

在默认的ValuesController内增加方法

        [HttpGet("Check")]
        public User Check([FromQuery]User user)
        {
            return user;
        }

我们修改以下User类

//增加一个验证特性
[ValidateBase(typeof(ValidateClass), "IsValidateUser")]

    public class ValidateClass
    {
        public bool IsValidateUser(User user)
        {
            return user.Name.Equals("admin", StringComparison.InvariantCultureIgnoreCase) || user.Account.Equals("admin", StringComparison.InvariantCultureIgnoreCase);
        }
    }

只要用户名或者账号为admin

你以为这样就完了？No，模型验证要触发，必须有一个模型验证触发的过滤器

    public class ModelFilter : ActionFilterAttribute
    {
        public override void OnActionExecuting(ActionExecutingContext context)
        {
            if (!context.ModelState.IsValid)
            {
                string errorMessage = string.Empty;
                var ErrorsModel = context.ModelState.Values.Where(item => { return item.Errors.Count > ; }).ToList().FirstOrDefault();
                if (ErrorsModel != null)
                {
                    errorMessage = ErrorsModel.Errors[].ErrorMessage;
                }

                context.Result = new JsonResult(new { status = -, msg = errorMessage });
                return;
            }
        }
    }

在ConfigureServices内的

//services.AddMvc();
services.AddMvc(options => options.Filters.Add<ModelFilter>());

运行起来测试一下