73 lines
2.2 KiB
C#
73 lines
2.2 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
|
|
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
|
|
|
|
using System;
|
|
using System.Globalization;
|
|
using Microsoft.AspNet.Http;
|
|
|
|
namespace Microsoft.AspNet.Routing.Constraints
|
|
{
|
|
/// <summary>
|
|
/// Constrains a route parameter to be a string with a minimum length.
|
|
/// </summary>
|
|
public class MinLengthRouteConstraint : IRouteConstraint
|
|
{
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="MinLengthRouteConstraint" /> class.
|
|
/// </summary>
|
|
/// <param name="minLength">The minimum length allowed for the route parameter.</param>
|
|
public MinLengthRouteConstraint(int minLength)
|
|
{
|
|
if (minLength < 0)
|
|
{
|
|
var errorMessage = Resources.FormatArgumentMustBeGreaterThanOrEqualTo(0);
|
|
throw new ArgumentOutOfRangeException(nameof(minLength), minLength, errorMessage);
|
|
}
|
|
|
|
MinLength = minLength;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the minimum length allowed for the route parameter.
|
|
/// </summary>
|
|
public int MinLength { get; private set; }
|
|
|
|
/// <inheritdoc />
|
|
public bool Match(
|
|
HttpContext httpContext,
|
|
IRouter route,
|
|
string routeKey,
|
|
RouteValueDictionary values,
|
|
RouteDirection routeDirection)
|
|
{
|
|
if (httpContext == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(httpContext));
|
|
}
|
|
|
|
if (route == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(route));
|
|
}
|
|
|
|
if (routeKey == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(routeKey));
|
|
}
|
|
|
|
if (values == null)
|
|
{
|
|
throw new ArgumentNullException(nameof(values));
|
|
}
|
|
|
|
object value;
|
|
if (values.TryGetValue(routeKey, out value) && value != null)
|
|
{
|
|
var valueString = Convert.ToString(value, CultureInfo.InvariantCulture);
|
|
return valueString.Length >= MinLength;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
} |