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