一个UrlRewrite自定义规则

作者：袖梨 2022-06-25

都是在web.config里配置访问规则在路由到实际页面，所以先实现自定义节点信息读取,这里我定义了俩个类，贴出详细信息

ps教程ed="">
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namespace UrlRewrite
{
public class UrlRewriteConfigGroup : ConfigurationSectionGroup
{
[ConfigurationProperty("rules")]
public UrlRewriteConfig Rules
{
get
{
return (UrlRewriteConfig)base.Sections["rules"];
}
}
}
}
　　
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namespace UrlRewrite
{
public class UrlRewriteConfig : ConfigurationSection
{
[ConfigurationProperty("enable", DefaultValue = false)]
public bool Enable
{
get
{
return (bool)base["enable"];
}
}
[ConfigurationProperty("suffix", DefaultValue = ".html")]
public string Suffix
{
get
{
return (string)base["suffix"];
}
}
[ConfigurationProperty("", IsDefaultCollection = true)]
public RulesElectionCollection Rules
{
get
{
return (RulesElectionCollection)base[""];
}
}
}
public class UrlRewriteConfigRule : ConfigurationElement
{
[ConfigurationProperty("form")]
public string Form
{
get
{
return (string)base["form"];
}
}
[ConfigurationProperty("to")]
public string To
{
get
{
return (string)base["to"];
}
}
[ConfigurationProperty("query")]
public string Query
{
get
{
return (string)base["query"];
}
}
}
public class RulesElectionCollection : ConfigurationElementCollection
{
protected override ConfigurationElement CreateNewElement()
{
return new UrlRewriteConfigRule();
}
protected override object GetElementKey(ConfigurationElement element)
{
return ((UrlRewriteConfigRule)element).Form;
}
}
public static class UrlRewriteConfigHelp
{
public static bool Enabled
{
get
{
UrlRewriteConfig section
= ConfigurationManager.GetSection("rulesGroup/rules")
as UrlRewriteConfig;
if (section == null)
{
return false;
}
return section.Enable;
}
}
public static string Suffix
{
get
{
UrlRewriteConfig section
= ConfigurationManager.GetSection("rulesGroup/rules")
as UrlRewriteConfig;
if (section == null)
{
return ".html";
}
return section.Suffix;
}
}
public static RulesElectionCollection Rules
{
get
{
UrlRewriteConfig section
= ConfigurationManager.GetSection("rulesGroup/rules")
as UrlRewriteConfig;
if (section == null)
{
throw new System.InvalidOperationException("未能获取rulesGroup/rules");
}
return section.Rules;
}
}
public static string RewriteBase
{
get
{
string path = HttpContext.Current.Request.ApplicationPath;
if (!path.EndsWith("/"))
{
return path + "/";
}
return path;
}
}
}
}
　　
这里定义了组，不需要的话可以把UrlRewriteConfigGroup类去掉并修改配置节点，在UrlRewriteConfig类里又定义了UrlRewriteConfigHelp帮助类获取节点信息...
然后实现IHttpModule实现重写
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namespace UrlRewrite
{
public class UrlRewrite : IHttpModule
{
#region IHttpModule 成员
public void Dispose()
{
throw new NotImplementedException();
}
public void Init(HttpApplication context)
{
context.BeginRequest += new EventHandler(Application_BeginRequest);
//context.PreRequestHandlerExecute += new EventHandler(Application_PreRequestHandlerExecute);
}
void Application_BeginRequest(object sender, EventArgs e)
{
HttpContext context = HttpContext.Current;
// 取得当前请求的路径
string path = context.Request.Path;
string suffix = String.Empty;
if (UrlRewriteConfigHelp.Enabled)
suffix = UrlRewriteConfigHelp.Suffix;
// 遍历所有的映射规则，进行映射处理
foreach (UrlRewriteConfigRule rule in UrlRewriteConfigHelp.Rules)
{
Regex regex = new Regex("^" + rule.Form + suffix + "$", RegexOptions.IgnoreCase);
Match match = regex.Match(path);
if (match.Success)
{
string trueUrl = UrlRewriteConfigHelp.RewriteBase + rule.To;
context.Items["OriginalUrl"] = context.Request.RawUrl;
if ("POST".Equals(context.Request.HttpMethod))
trueUrl = trueUrl.Substring(0, trueUrl.LastIndexOf("?"));
else
{
int count = match.Groups.Count;
if (count > 1 && match.Groups[1].Value != "")
{
for (int i = 1; i
{
trueUrl = trueUrl.Replace("$" + i, match.Groups[i + 1].Value);
}
}
}
context.RewritePath(trueUrl);
return;
}
}
//context.RewritePath("/error.htm");
}
　　
然后就可以访问了
这里from的action生成的是实际的地址，为了能让form生成请求的地址要重写form的action生成，这里定义了一个form.browser文件和一个FormRewriterControlAdapter类
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namespace UrlRewrite
{
public class FormRewriterControlAdapter :
System.Web.UI.Adapters.ControlAdapter
{
protected override void Render(HtmlTextWriter writer)
{
base.Render(new RewriteFormHtmlTextWriter(writer));
}
}
public class RewriteFormHtmlTextWriter : HtmlTextWriter
{
public RewriteFormHtmlTextWriter(HtmlTextWriter writer)
: base(writer)
{
this.InnerWriter = writer.InnerWriter;
}
public RewriteFormHtmlTextWriter(TextWriter writer)
: base(writer)
{
this.InnerWriter = writer;
}
public override void WriteAttribute(string name, string value, bool fEncode)
{
if (name == "action")
{
HttpContext context = HttpContext.Current;

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