Asp.Net Mvc Area二级域名
参考：https://blog.maartenballiauw.be/post/2009/05/20/aspnet-mvc-domain-routing.html
参考：https://www.cnblogs.com/Showshare/p/multidomain-to-onesite-subdomain-to-area-by-routing.html
适当使用反编译工具查看 Route 的源码
主要类
DomainData.cs
namespace DomainMvcTest.Core
{
public class DomainData
{
public string Protocol { get; set; }
public string HostName { get; set; }
public string Fragment { get; set; }
}
}DomainRoute.cs
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Mvc;
using System.Web.Routing;
namespace DomainMvcTest.Core
{
public class DomainRoute : Route
{
private Regex domainRegex;
private Regex pathRegex;
public string Domain { get; set; }
public DomainRoute(string domain, string url, RouteValueDictionary defaults)
: base(url, defaults, new MvcRouteHandler())
{
Domain = domain;
}
public DomainRoute(string domain, string url, RouteValueDictionary defaults, IRouteHandler routeHandler)
: base(url, defaults, routeHandler)
{
Domain = domain;
}
public DomainRoute(string domain, string url, object defaults)
: base(url, new RouteValueDictionary(defaults), new MvcRouteHandler())
{
Domain = domain;
}
public DomainRoute(string domain, string url, object defaults, IRouteHandler routeHandler)
: base(url, new RouteValueDictionary(defaults), routeHandler)
{
Domain = domain;
}
public override RouteData GetRouteData(HttpContextBase httpContext)
{
// 构造 regex
domainRegex = CreateRegex(Domain);
pathRegex = CreateRegex(Url);
// 请求信息
string requestDomain = httpContext.Request.Headers["host"];
if (!string.IsNullOrEmpty(requestDomain))
{
if (requestDomain.IndexOf(":") > 0)
{
requestDomain = requestDomain.Substring(0, requestDomain.IndexOf(":"));
}
}
else
{
requestDomain = httpContext.Request.Url.Host;
}
string requestPath = httpContext.Request.AppRelativeCurrentExecutionFilePath.Substring(2) + httpContext.Request.PathInfo;
// 匹配域名和路由
Match domainMatch = domainRegex.Match(requestDomain);
Match pathMatch = pathRegex.Match(requestPath);
// 路由数据
RouteData data = null;
if (domainMatch.Success && pathMatch.Success)
{
data = new RouteData(this, RouteHandler);
// 添加默认选项
if (Defaults != null)
{
foreach (KeyValuePair<string, object> item in Defaults)
{
data.Values[item.Key] = item.Value;
if (item.Key.Equals("area") || item.Key.Equals("Namespaces"))
{
data.DataTokens[item.Key] = item.Value;
}
}
}
// 匹配域名
for (int i = 1; i < domainMatch.Groups.Count; i++)
{
Group group = domainMatch.Groups[i];
if (group.Success)
{
string key = domainRegex.GroupNameFromNumber(i);
if (!string.IsNullOrEmpty(key) && !char.IsNumber(key, 0))
{
if (!string.IsNullOrEmpty(group.Value))
{
data.Values[key] = group.Value;
if (key.Equals("area"))
{
data.DataTokens[key] = group.Value;
}
}
}
}
}
// 匹配路径
for (int i = 1; i < pathMatch.Groups.Count; i++)
{
Group group = pathMatch.Groups[i];
if (group.Success)
{
string key = pathRegex.GroupNameFromNumber(i);
if (!string.IsNullOrEmpty(key) && !char.IsNumber(key, 0))
{
if (!string.IsNullOrEmpty(group.Value))
{
data.Values[key] = group.Value;
if (key.Equals("area"))
{
data.DataTokens[key] = group.Value;
}
}
}
}
}
}
return data;
}
public override VirtualPathData GetVirtualPath(RequestContext requestContext, RouteValueDictionary values)
{
return base.GetVirtualPath(requestContext, RemoveDomainTokens(values));
}
public DomainData GetDomainData(RequestContext requestContext, RouteValueDictionary values)
{
// 获得主机名
string hostname = Domain;
foreach (KeyValuePair<string, object> pair in values)
{
if (pair.Key == "area" && string.IsNullOrEmpty(pair.Value.ToString()))
{
hostname = hostname.Replace("{" + pair.Key + "}", "www");
}
else
{
hostname = hostname.Replace("{" + pair.Key + "}", pair.Value.ToString());
}
}
//如果域名的area还没有被替换，说明路由数据里没有area，恢复为顶级域名
if (hostname.Contains("{area}"))
{
hostname = hostname.Replace("{area}", "www");
}
RemoveDomainTokens(values);
// Return 域名数据
return new DomainData
{
Protocol = "http",
HostName = hostname,
Fragment = ""
};
}
private Regex CreateRegex(string source)
{
// 替换
source = source.Replace("/", @"\/?");
source = source.Replace(".", @"\.?");
source = source.Replace("-", @"\-?");
source = source.Replace("{", @"(?<");
source = source.Replace("}", @">([a-zA-Z0-9_]*))");
return new Regex("^" + source + "$");
}
private RouteValueDictionary RemoveDomainTokens(RouteValueDictionary values)
{
Regex tokenRegex = new Regex(@"({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?({[a-zA-Z0-9_]*})*-?\.?\/?");
Match tokenMatch = tokenRegex.Match(Domain);
for (int i = 0; i < tokenMatch.Groups.Count; i++)
{
Group group = tokenMatch.Groups[i];
if (group.Success)
{
string key = group.Value.Replace("{", "").Replace("}", "");
if (values.ContainsKey(key))
values.Remove(key);
}
}
return values;
}
}
}LinkExtensions.cs
using System.Collections.Generic;
using System.Linq;
using System.Web.Routing;
using DomainMvcTest.Core;
namespace System.Web.Mvc.Html
{
public static class LinkExtensions
{
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, null, new RouteValueDictionary(), new RouteValueDictionary(), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, object routeValues, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, null, new RouteValueDictionary(routeValues), new RouteValueDictionary(), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, controllerName, new RouteValueDictionary(), new RouteValueDictionary(), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, RouteValueDictionary routeValues, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, null, routeValues, new RouteValueDictionary(), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, object routeValues, object htmlAttributes, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, null, new RouteValueDictionary(routeValues), new RouteValueDictionary(htmlAttributes), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, RouteValueDictionary routeValues, IDictionary<string, object> htmlAttributes, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, null, routeValues, htmlAttributes, requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName, object routeValues, object htmlAttributes, bool requireAbsoluteUrl)
{
return htmlHelper.ActionLink(linkText, actionName, controllerName, new RouteValueDictionary(routeValues), new RouteValueDictionary(htmlAttributes), requireAbsoluteUrl);
}
public static MvcHtmlString ActionLink(this HtmlHelper htmlHelper, string linkText, string actionName, string controllerName, RouteValueDictionary routeValues, IDictionary<string, object> htmlAttributes, bool requireAbsoluteUrl)
{
if (requireAbsoluteUrl)
{
HttpContextBase currentContext = new HttpContextWrapper(HttpContext.Current);
RouteData routeData = RouteTable.Routes.GetRouteData(currentContext);
routeData.Values["controller"] = controllerName;
routeData.Values["action"] = actionName;
//如果不需要变换area，则routeValues不传入area的值
if (routeValues.Keys.Contains("area"))
{
routeData.Values["area"] = routeValues["area"];
}
DomainRoute domainRoute = routeData.Route as DomainRoute;
if (domainRoute != null)
{
DomainData domainData = domainRoute.GetDomainData(new RequestContext(currentContext, routeData), routeData.Values);
return htmlHelper.ActionLink(linkText, actionName, controllerName, domainData.Protocol, domainData.HostName, domainData.Fragment, routeData.Values, null);
}
}
return htmlHelper.ActionLink(linkText, actionName, controllerName, routeValues, htmlAttributes);
}
}
}在 AreaRegistration 中注册路由
using System.Web.Mvc;
using DomainMvcTest.Core;
namespace DomainMvcTest.Areas.Haha
{
public class HahaAreaRegistration : AreaRegistration
{
public override string AreaName
{
get
{
return "Haha";
}
}
public override void RegisterArea(AreaRegistrationContext context)
{
context.Routes.Add("hahaDomain", new DomainRoute(
"{area}.chenwei.com", // Domain with parameters
"{controller}/{action}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = "", Namespaces = new[] { "DomainMvcTest.Areas.Haha.Controllers" }} // Parameter defaults
));
//context.MapRoute(
// "Haha_default",
// "Haha/{controller}/{action}/{id}",
// new { action = "Index", id = UrlParameter.Optional }
//);
}
}
}View 中生成Url连接
@Html.ActionLink("前往首页", "Index", "Home",new{area=""},null,true) <br/>
@Html.ActionLink("前往Hehe", "Index", "Home", new { area = "Hehe" }, null, true)<br />
@Html.ActionLink("前往Haha", "Index", "Home", new { area = "Haha" }, null, true)