|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Globalization;
#if !COMPONENTS
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing.Matching;
#else
using Microsoft.AspNetCore.Components.Routing;
#endif
namespace Microsoft.AspNetCore.Routing.Constraints;
#if !COMPONENTS
/// <summary>
/// Constrains a route parameter to be a string with a maximum length.
/// </summary>
public class MaxLengthRouteConstraint : IRouteConstraint, IParameterLiteralNodeMatchingPolicy, ICachableParameterPolicy
#else
internal class MaxLengthRouteConstraint : IRouteConstraint
#endif
{
/// <summary>
/// Initializes a new instance of the <see cref="MaxLengthRouteConstraint" /> class.
/// </summary>
/// <param name="maxLength">The maximum length allowed for the route parameter.</param>
public MaxLengthRouteConstraint(int maxLength)
{
if (maxLength < 0)
{
var errorMessage = Resources.FormatArgumentMustBeGreaterThanOrEqualTo(0);
throw new ArgumentOutOfRangeException(nameof(maxLength), maxLength, errorMessage);
}
MaxLength = maxLength;
}
/// <summary>
/// Gets the maximum length allowed for the route parameter.
/// </summary>
public int MaxLength { get; }
/// <inheritdoc />
public bool Match(
#if !COMPONENTS
HttpContext? httpContext,
IRouter? route,
string routeKey,
RouteValueDictionary values,
RouteDirection routeDirection)
#else
string routeKey,
RouteValueDictionary values)
#endif
{
ArgumentNullException.ThrowIfNull(routeKey);
ArgumentNullException.ThrowIfNull(values);
if (values.TryGetValue(routeKey, out var value) && value != null)
{
var valueString = Convert.ToString(value, CultureInfo.InvariantCulture)!;
return CheckConstraintCore(valueString);
}
return false;
}
private bool CheckConstraintCore(string valueString)
{
return valueString.Length <= MaxLength;
}
#if !COMPONENTS
bool IParameterLiteralNodeMatchingPolicy.MatchesLiteral(string parameterName, string literal)
{
return CheckConstraintCore(literal);
}
#endif
}
|