70 lines
2.6 KiB
C#
70 lines
2.6 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 Microsoft.AspNet.Http;
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using Microsoft.AspNet.Mvc;
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using Microsoft.Framework.DependencyInjection;
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using Microsoft.Framework.OptionsModel;
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namespace UrlHelperWebSite
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{
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/// <summary>
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/// Following are some of the scenarios exercised here:
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/// 1. Based on configuration, generate Content urls pointing to local or a CDN server
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/// 2. Based on configuration, generate lower case urls
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/// </summary>
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public class CustomUrlHelper : UrlHelper
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{
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private readonly IOptions<AppOptions> _appOptions;
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private readonly HttpContext _httpContext;
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public CustomUrlHelper(IScopedInstance<ActionContext> contextAccessor, IActionSelector actionSelector,
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IOptions<AppOptions> appOptions)
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: base(contextAccessor, actionSelector)
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{
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_appOptions = appOptions;
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_httpContext = contextAccessor.Value.HttpContext;
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}
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/// <summary>
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/// Depending on config data, generates an absolute url pointing to a CDN server
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/// or falls back to the default behavior
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/// </summary>
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/// <param name="contentPath"></param>
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/// <returns></returns>
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public override string Content(string contentPath)
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{
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if (_appOptions.Options.ServeCDNContent
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&& contentPath.StartsWith("~/", StringComparison.Ordinal))
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{
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var segment = new PathString(contentPath.Substring(1));
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return ConvertToLowercaseUrl(_appOptions.Options.CDNServerBaseUrl + segment);
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}
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return ConvertToLowercaseUrl(base.Content(contentPath));
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}
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public override string RouteUrl(string routeName, object values, string protocol, string host, string fragment)
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{
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return ConvertToLowercaseUrl(base.RouteUrl(routeName, values, protocol, host, fragment));
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}
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public override string Action(string action, string controller, object values, string protocol, string host, string fragment)
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{
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return ConvertToLowercaseUrl(base.Action(action, controller, values, protocol, host, fragment));
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}
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private string ConvertToLowercaseUrl(string url)
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{
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if (!string.IsNullOrEmpty(url)
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&& _appOptions.Options.GenerateLowercaseUrls)
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{
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return url.ToLowerInvariant();
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}
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return url;
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}
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}
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} |