实现快速简单高效并可以灵活配置的URL重写方案
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关键代码:
public class MyHttpModule : IHttpModule
{
public void Init(HttpApplication app)
{
app.AuthorizeRequest += new EventHandler(app_AuthorizeRequest);
}
public void Dispose() {}
protected void Rewrite(string requestedPath, System.Web.HttpApplication app)
{
// app.Context.RewritePath("~/default.aspx", string.Empty, "test=tttttttt");
foreach(URLRewrite url in SiteUrls.GetSiteUrls().Urls)
{
if (Regex.IsMatch(app.Context.Request.Path, url.Pattern, RegexOptions.Compiled|RegexOptions.IgnoreCase))
{
app.Context.RewritePath(url.Page, string.Empty, Regex.Replace(app.Context.Request.Path, url.Pattern, url.QueryString, RegexOptions.Compiled|RegexOptions.IgnoreCase));
return;
}
}
if (app.Context.Request.Path.ToLower().EndsWith(".shtml"))
{
app.Context.Response.Redirect("~/index.html");
}
}
private void app_AuthorizeRequest(object sender, EventArgs e)
{
HttpApplication app = (HttpApplication) sender;
Rewrite(app.Request.Path, app);
}
}
public class SiteUrls
{
#region 内部属性和方法
string SiteUrlsFile = HttpContext.Current.Server.MapPath(ConfigurationSettings.AppSettings["SiteUrls"]);
private ArrayList _Urls;
public ArrayList Urls
{
get
{
return _Urls;
}
set
{
_Urls = value;
}
}
private NameValueCollection _Paths;
public NameValueCollection Paths
{
get
{
return _Paths;
}
set
{
_Paths = value;
}
}
private SiteUrls()
{
string applicationPath = HttpContext.Current.Request.ApplicationPath;
if (applicationPath == "/")
{
applicationPath = string.Empty;
}
Urls = new ArrayList();
Paths = new NameValueCollection();
Paths.Add("home", applicationPath);
XmlDocument xml = new XmlDocument();
xml.Load(SiteUrlsFile);
XmlNode root = xml.SelectSingleNode("SiteUrls");
foreach(XmlNode n in root.ChildNodes)
{
if (n.NodeType != XmlNodeType.Comment && n.Name.ToLower() == "rewrite")
{
XmlAttribute name = n.Attributes["name"];
XmlAttribute path = n.Attributes["path"];
XmlAttribute page = n.Attributes["page"];
XmlAttribute querystring = n.Attributes["querystring"];
XmlAttribute pattern = n.Attributes["pattern"];
if (name != null && path != null && page != null && querystring != null && pattern != null)
{
Paths.Add(name.Value, applicationPath + path.Value);
Urls.Add(new URLRewrite(name.Value, Paths["home"]+pattern.Value, Paths["home"]+page.Value.Replace("^", "&"), querystring.Value.Replace("^", "&")));
}
}
}
}
#endregion
public static SiteUrls GetSiteUrls()
{
string CacheKey = "SiteUrls";
SiteUrls urls = System.Web.HttpContext.Current.Cache["SiteUrls"] as SiteUrls;
if (urls == null)
{
urls = new SiteUrls();
System.Web.HttpContext.Current.Cache.Insert(CacheKey, urls, new CacheDependency(urls.SiteUrlsFile), DateTime.MaxValue, TimeSpan.Zero, CacheItemPriority.High, null);
}
return urls;
}
/// <summary>
/// 输出URL示例
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public string Show(int id)
{
return string.Format(Paths["Show"], id);
}
public class URLRewrite
{
#region 成员变量
private string _Name;
public string Name
{
get
{
return _Name;
}
set
{
_Name = value;
}
}
private string _Pattern;
public string Pattern
{
get
{
return _Pattern;
}
set
{
_Pattern = value;
}
}
private string _Page;
public string Page
{
get
{
return _Page;
}
set
{
_Page = value;
}
}
private string _QueryString;
public string QueryString
{
get
{
return _QueryString;
}
set
{
_QueryString = value;
}
}
#endregion
#region 构造函数
public URLRewrite(string name, string pattern, string page, string querystring)
{
_Name = name;
_Pattern = pattern;
_Page = page;
_QueryString = querystring;
}
#endregion
}
public class PageBase : Page
{
private PageBase()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
//// <summary>
/// 重写默认的HtmlTextWriter方法，修改form标记中的value属性，使其值为重写的URL而不是真实URL。
/// </summary>
/// <param name="writer"></param>
protected override void Render(HtmlTextWriter writer)
{
if (writer is System.Web.UI.Html32TextWriter)
{
writer = new FormFixerHtml32TextWriter(writer.InnerWriter);
}
else
{