51 lines
1.8 KiB
C#
51 lines
1.8 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc. 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.Collections.Generic;
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using System.Globalization;
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using Microsoft.AspNet.Http;
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namespace Microsoft.AspNet.Routing.Constraints
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{
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/// <summary>
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/// Constrains a route parameter to be an integer with a maximum value.
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/// </summary>
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public class MaxRouteConstraint : IRouteConstraint
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="MaxRouteConstraint" /> class.
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/// </summary>
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/// <param name="max">The maximum value allowed for the route parameter.</param>
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public MaxRouteConstraint(long max)
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{
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Max = max;
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}
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/// <summary>
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/// Gets the maximum allowed value of the route parameter.
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/// </summary>
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public long Max { get; private set; }
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/// <inheritdoc />
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public bool Match([NotNull] HttpContext httpContext,
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[NotNull] IRouter route,
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[NotNull] string routeKey,
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[NotNull] IDictionary<string, object> values,
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RouteDirection routeDirection)
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{
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object value;
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if (values.TryGetValue(routeKey, out value) && value != null)
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{
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long longValue;
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var valueString = Convert.ToString(value, CultureInfo.InvariantCulture);
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if (Int64.TryParse(valueString, NumberStyles.Integer, CultureInfo.InvariantCulture, out longValue))
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{
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return longValue <= Max;
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}
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}
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return false;
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}
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}
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} |