[英]Fluent Validation for Webapi Single parameter
我正在使用webapi2和Fluent验证来验证请求。 我有以下方法。
public IHttpActionResult Post(string id)
{}
我想向id添加验证,例如正则表达式验证和长度验证。 有什么方法可以使用与[FromQuery]
相同语法的自定义验证器属性?
我创建了一个自定义参数绑定属性来进行验证。
public class ValidateItemAttribute : ParameterBindingAttribute
{
public override HttpParameterBinding GetBinding(HttpParameterDescriptor parameter) => new ItemIdValidation(parameter);
}
public class ItemIdValidation : HttpParameterBinding, IValueProviderParameterBinding
{
public HttpParameterBinding DefaultUriBinding;
public IEnumerable<ValueProviderFactory> ValueProviderFactories { get; }
public ItemIdValidation(HttpParameterDescriptor desc) : base(desc)
{
var defaultUrl = new FromUriAttribute();
this.DefaultUriBinding = defaultUrl.GetBinding(desc);
this.ValueProviderFactories = defaultUrl.GetValueProviderFactories(desc.Configuration);
}
public override Task ExecuteBindingAsync(ModelMetadataProvider metadataProvider, HttpActionContext actionContext, CancellationToken cancellationToken)
{
return DefaultUriBinding.ExecuteBindingAsync(metadataProvider, actionContext, cancellationToken).ContinueWith((tsk) =>
{
var currentBoundValue = this.GetValue(actionContext)?.ToString();
var isMatched = currentBoundValue != null ? Regex.IsMatch(currentBoundValue, "^[0-9]*$") : false;
if (null != currentBoundValue && (!isMatched || currentBoundValue?.Length != 6))
{
var result = new
{
ErrorCode ="1",
ErrorDescription = "Invalid item id"
};
actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, result, "application/json");
}
}, cancellationToken);
}
}
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