70 lines
2.2 KiB
C#
70 lines
2.2 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.Collections.Generic;
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using System.Threading.Tasks;
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using Microsoft.AspNet.Http;
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using Microsoft.AspNet.Routing;
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namespace CustomRouteWebSite
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{
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public class LocalizedRoute : IRouter
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{
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private readonly IRouter _next;
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private readonly Dictionary<string, string> _users = new Dictionary<string, string>(StringComparer.Ordinal)
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{
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{ "Javier", "es-ES" },
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{ "Doug", "en-CA" },
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};
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public LocalizedRoute(IRouter next)
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{
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_next = next;
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}
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public VirtualPathData GetVirtualPath(VirtualPathContext context)
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{
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// We just want to act as a pass-through for link generation
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return _next.GetVirtualPath(context);
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}
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public async Task RouteAsync(RouteContext context)
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{
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// Saving and restoring the original route data ensures that any values we
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// add won't 'leak' if action selection doesn't match.
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var oldRouteData = context.RouteData;
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// For diagnostics and link-generation purposes, routing should include
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// a list of IRoute instances that lead to the ultimate destination.
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// It's the responsibility of each IRouter to add the 'next' before
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// calling it.
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var newRouteData = new RouteData(oldRouteData);
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newRouteData.Routers.Add(_next);
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var locale = GetLocale(context.HttpContext) ?? "en-US";
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newRouteData.Values.Add("locale", locale);
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try
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{
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context.RouteData = newRouteData;
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await _next.RouteAsync(context);
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}
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finally
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{
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if (!context.IsHandled)
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{
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context.RouteData = oldRouteData;
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}
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}
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}
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private string GetLocale(HttpContext context)
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{
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string locale;
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_users.TryGetValue(context.Request.Headers["User"], out locale);
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return locale;
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}
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}
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} |