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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
{
writer = new FormFixerHtmlTextWriter(writer.InnerWriter);
}
base.Render(writer);
}
}
internal class FormFixerHtml32TextWriter : System.Web.UI.Html32TextWriter
{
private string _url; // 假的URL
internal FormFixerHtml32TextWriter(TextWriter writer):base(writer)
{
_url = HttpContext.Current.Request.RawUrl;
}
public override void WriteAttribute(string name, string value, bool encode)
{
// 如果当前输出的属性为form标记的action属性，则将其值替换为重写后的虚假URL
if (_url != null && string.Compare(name, 'action', true) == 0)
{
value = _url;
}
base.WriteAttribute(name, value, encode);
}
}
internal class FormFixerHtmlTextWriter : System.Web.UI.HtmlTextWriter
{
private string _url;
internal FormFixerHtmlTextWriter(TextWriter writer):base(writer)
{
_url = HttpContext.Current.Request.RawUrl;
}
public override void WriteAttribute(string name, string value, bool encode)
{
if (_url != null && string.Compare(name, 'action', true) == 0)
{
value = _url;
}
base.WriteAttribute(name, value, encode);
}
}
重写配置文件:
<?xml version='1.0' encoding='utf-8' ?>
<SiteUrls>
<!--如果重写shtml扩展名，需要在IIS里，调整应用程序映射，把shtml扩展名映射到C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\aspnet_isapi.dll，注意取消检查文件是否存在-->
<!--访问方式http://localhost/Example/Show/323.shtml-->
<rewrite name='Show'
path='/Show/{0}.shtml'
pattern = '/Show/(\d+).shtml'
page='/WebForm1.aspx'
querystring='id=$1^cn=ItemList' />
</SiteUrls>