asp.net 二级域名(路由方式实现)
自從微軟發布 ASP.NET MVC 和routing engine (System.Web.Routing)以來,就設法讓我們明白你完全能控制URL和routing,只要與你的application path相結合進行擴展,任何問題都迎刃而解。如果你需要在所處的域或者子域處理數據標記的話,強制使用Default。
遺憾的是,ASP.NET MVC是基于虛擬目錄的,在實際項目卻有各種各樣的需求方案。
例如:
1:應用程序是多語言的,像cn.example.com應該被匹配到“www.{language}example.com”路由上。
2:應用程序是多用戶的,像username.example.com應該被匹配到“www.{clientname}.example.com”路由上。
3:應用程序是多子域的,像mobile.example.com應該被匹配到"www.{controller}.example.com/{action}....” 。
坐下來,深呼吸,開始我們ASP.NET MVC的神奇之旅吧。
定義routes
?
下面是我們定義簡單的route,不帶任何controller控制的route:
?
routes.Add("DomainRoute",?new?DomainRoute(?
"home.example.com",?//?Domain?with?parameters
"{action}/{id}",????//?URL?with?parameters
new?{?controller?=?"Home",?action?=?"Index",?id?=?""?}??//?Parameter?defaults
));
另一個例子是用我們的controller控制域名:
?
routes.Add("DomainRoute",?new?DomainRoute(?
"{controller}.example.com",?????//?Domain?with?parameters<?br?/>????"{action}/{id}",????//?URL?with?parameters
new?{?controller?=?"Home",?action?=?"Index",?id?=?""?}??//?Parameter?defaults
));
打算用controller 和action完全控制域名?
?
routes.Add("DomainRoute",?new?DomainRoute(?
"{controller}-{action}.example.com",?????//?Domain?with?parameters
"{id}",????//?URL?with?parameters
new?{?controller?=?"Home",?action?=?"Index",?id?=?""?}??//?Parameter?defaults
));
接下來是多語言route:
routes.Add("DomainRoute",?new?DomainRoute(?
"{language}.example.com",?????//?Domain?with?parameters
"{controller}/{action}/{id}",????//?URL?with?parameters
new?{?language?=?"en",?controller?=?"Home",?action?=?"Index",?id?=?""?}??//?Parameter?defaults
));
HtmlHelper 擴展方法
因為我們不希望所有的URL所產生HtmlHelper ActionLink要使用full URLs,第一件事我們會添加一些新的ActionLink,其中載有boolean flag是否要full URLs或沒有。利用這些,現在您可以添加一個鏈接到一個Action如下:
?
<%=?Html.ActionLink("About",?"About",?"Home",?true)%>跟你以往的習慣沒有什么不同,不是嗎?
以下是一小段代碼:
?
public?static?class?LinkExtensions?
{?
public?static?string?ActionLink(this?HtmlHelper?htmlHelper,?string?linkText,?string?actionName,?string?controllerName,?bool?requireAbsoluteUrl)?
????{?
return?htmlHelper.ActionLink(linkText,?actionName,?controllerName,?new?RouteValueDictionary(),?new?RouteValueDictionary(),?requireAbsoluteUrl);?
????}?
//?more?of?these?
public?static?string?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;?
????????????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);?
????}?
}
在這沒什么特別的:有許多的擴展方法,把擴展的URL加到域名上。這是一個預設ActionLink helpers,我的精神食糧來了DomainRoute?class(詳見:Dark Magic)
Dark magic
瞥眼之間,您可能已經看到了我的DomainRoute類代碼段。這個類實際上是提取子域,并增加了象征性支持域部分的傳入的URL,
我們將擴展基類,它已經給了我們一些屬性和方法,但是我們得重寫他們!
?
public?class?DomainRoute?:?Route?
{??
//??
public?string?Domain?{?get;?set;?}?
//??
public?override?RouteData?GetRouteData(HttpContextBase?httpContext)?
????{?
//?構造regex
????????domainRegex?=?CreateRegex(Domain);?
????????pathRegex?=?CreateRegex(Url);?
//?請求信息
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);
//?Route?數據
????????RouteData?data?=?null;?
if?(domainMatch.Success?&&?pathMatch.Success)?
????????{?
????????????data?=?new?RouteData(this,?RouteHandler);
//?添加默認選項
if?(Defaults?!=?null)?
????????????{?
foreach?(KeyValuePair<string,?object>?item?in?Defaults)?
????????????????{?
????????????????????data.Values[item.Key]?=?item.Value;?
????????????????}?
????????????}?
//?匹配域名路由
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;?
????????????????????????}?
????????????????????}?
????????????????}?
????????????}?
//?匹配域名路徑
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;?
????????????????????????}?
????????????????????}?
????????????????}?
????????????}?
????????}?
return?data;?
????}?
public?override?VirtualPathData?GetVirtualPath(RequestContext?requestContext,?RouteValueDictionary?values)?
????{?
return?base.GetVirtualPath(requestContext,?RemoveDomainTokens(values));?
????}?
public?DomainData?GetDomainData(RequestContext?requestContext,?RouteValueDictionary?values)?
????{?
//?獲得主機名
string?hostname?=?Domain;?
foreach?(KeyValuePair<string,?object>?pair?in?values)?
????????{?
????????????hostname?=?hostname.Replace("{"?+?pair.Key?+?"}",?pair.Value.ToString());?
????????}
//?Return?域名數據
return?new?DomainData?
????????{?
????????????Protocol?=?"http",?
????????????HostName?=?hostname,?
????????????Fragment?=?""
????????};?
????}
//?
}
?
轉載于:https://www.cnblogs.com/liangxiaofeng/p/5649739.html
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