74 lines
2.6 KiB
C#
74 lines
2.6 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.Threading.Tasks;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Routing;
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using Microsoft.Extensions.Internal;
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namespace Microsoft.AspNetCore.Localization.Routing
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{
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/// <summary>
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/// Determines the culture information for a request via values in the route data.
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/// </summary>
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public class RouteDataRequestCultureProvider : RequestCultureProvider
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{
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/// <summary>
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/// The key that contains the culture name.
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/// Defaults to "culture".
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/// </summary>
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public string RouteDataStringKey { get; set; } = "culture";
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/// <summary>
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/// The key that contains the UI culture name. If not specified or no value is found,
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/// <see cref="RouteDataStringKey"/> will be used.
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/// Defaults to "ui-culture".
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/// </summary>
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public string UIRouteDataStringKey { get; set; } = "ui-culture";
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/// <inheritdoc />
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public override Task<ProviderCultureResult> DetermineProviderCultureResult(HttpContext httpContext)
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{
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if (httpContext == null)
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{
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throw new ArgumentNullException(nameof(httpContext));
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}
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string culture = null;
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string uiCulture = null;
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if (!string.IsNullOrEmpty(RouteDataStringKey))
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{
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culture = httpContext.GetRouteValue(RouteDataStringKey)?.ToString();
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}
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if (!string.IsNullOrEmpty(UIRouteDataStringKey))
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{
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uiCulture = httpContext.GetRouteValue(UIRouteDataStringKey)?.ToString();
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}
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if (culture == null && uiCulture == null)
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{
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// No values specified for either so no match
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return TaskCache<ProviderCultureResult>.DefaultCompletedTask;
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}
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if (culture != null && uiCulture == null)
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{
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// Value for culture but not for UI culture so default to culture value for both
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uiCulture = culture;
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}
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if (culture == null && uiCulture != null)
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{
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// Value for UI culture but not for culture so default to UI culture value for both
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culture = uiCulture;
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}
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var providerResultCulture = new ProviderCultureResult(culture, uiCulture);
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return Task.FromResult(providerResultCulture);
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}
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}
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} |