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
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{ |
public class UrlRewriteConfigGroup : ConfigurationSectionGroup
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{
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[ConfigurationProperty("rules")]
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public UrlRewriteConfig Rules
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{
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get
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{
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return (UrlRewriteConfig)base.Sections["rules"];
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}
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}
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}
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} |
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namespace UrlRewrite
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{ |
public class UrlRewriteConfig : ConfigurationSection
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{
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[ConfigurationProperty("enable", DefaultValue = false)]
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public bool Enable
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{
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get
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{
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return (bool)base["enable"];
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}
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}
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[ConfigurationProperty("suffix", DefaultValue = ".html")]
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public string Suffix
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{
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get
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{
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return (string)base["suffix"];
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}
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}
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[ConfigurationProperty("", IsDefaultCollection = true)]
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public RulesElectionCollection Rules
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{
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get
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{
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return (RulesElectionCollection)base[""];
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}
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}
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}
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public class UrlRewriteConfigRule : ConfigurationElement
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{
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[ConfigurationProperty("form")]
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public string Form
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{
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get
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{
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return (string)base["form"];
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}
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}
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[ConfigurationProperty("to")]
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public string To
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{
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get
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{
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return (string)base["to"];
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}
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}
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[ConfigurationProperty("query")]
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public string Query
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{
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get
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{
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return (string)base["query"];
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}
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}
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}
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public class RulesElectionCollection : ConfigurationElementCollection
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{
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protected override ConfigurationElement CreateNewElement()
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{
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return new UrlRewriteConfigRule();
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}
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protected override object GetElementKey(ConfigurationElement element)
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{
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return ((UrlRewriteConfigRule)element).Form;
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}
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}
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public static class UrlRewriteConfigHelp
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{
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public static bool Enabled
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{
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get
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{
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UrlRewriteConfig section
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= ConfigurationManager.GetSection("rulesGroup/rules")
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as UrlRewriteConfig;
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if (section == null)
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{
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return false;
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}
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return section.Enable;
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}
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}
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public static string Suffix
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{
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get
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{
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UrlRewriteConfig section
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= ConfigurationManager.GetSection("rulesGroup/rules")
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as UrlRewriteConfig;
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if (section == null)
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{
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return ".html";
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}
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return section.Suffix;
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}
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}
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public static RulesElectionCollection Rules
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{
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get
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{
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UrlRewriteConfig section
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= ConfigurationManager.GetSection("rulesGroup/rules")
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as UrlRewriteConfig;
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if (section == null)
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{
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throw new System.InvalidOperationException("未能获取rulesGroup/rules");
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}
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return section.Rules;
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}
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}
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public static string RewriteBase
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{
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get
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{
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string path = HttpContext.Current.Request.ApplicationPath;
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if (!path.EndsWith("/"))
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{
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return path + "/";
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}
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return path;
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}
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}
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}
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} |
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
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{ |
public class UrlRewrite : IHttpModule
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{
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#region IHttpModule 成员
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public void Dispose()
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{
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throw new NotImplementedException();
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}
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public void Init(HttpApplication context)
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{
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context.BeginRequest += new EventHandler(Application_BeginRequest);
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//context.PreRequestHandlerExecute += new EventHandler(Application_PreRequestHandlerExecute);
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}
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void Application_BeginRequest(object sender, EventArgs e)
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{
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HttpContext context = HttpContext.Current;
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// 取得当前请求的路径
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string path = context.Request.Path;
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string suffix = String.Empty;
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if (UrlRewriteConfigHelp.Enabled)
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suffix = UrlRewriteConfigHelp.Suffix;
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// 遍历所有的映射规则，进行映射处理
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foreach (UrlRewriteConfigRule rule in UrlRewriteConfigHelp.Rules)
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{
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Regex regex = new Regex("^" + rule.Form + suffix + "$", RegexOptions.IgnoreCase);
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Match match = regex.Match(path);
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if (match.Success)
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{
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string trueUrl = UrlRewriteConfigHelp.RewriteBase + rule.To;
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context.Items["OriginalUrl"] = context.Request.RawUrl;
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if ("POST".Equals(context.Request.HttpMethod))
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trueUrl = trueUrl.Substring(0, trueUrl.LastIndexOf("?"));
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else
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{
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int count = match.Groups.Count;
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if (count > 1 && match.Groups[1].Value != "")
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{
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for (int i = 1; i
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{
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trueUrl = trueUrl.Replace("$" + i, match.Groups[i + 1].Value);
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}
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}
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}
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context.RewritePath(trueUrl);
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return;
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}
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}
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//context.RewritePath("/error.htm");
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}
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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
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{ |
public class FormRewriterControlAdapter :
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System.Web.UI.Adapters.ControlAdapter
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{
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protected override void Render(HtmlTextWriter writer)
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{
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base.Render(new RewriteFormHtmlTextWriter(writer));
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}
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}
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public class RewriteFormHtmlTextWriter : HtmlTextWriter
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{
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public RewriteFormHtmlTextWriter(HtmlTextWriter writer)
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: base(writer)
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{
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this.InnerWriter = writer.InnerWriter;
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}
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public RewriteFormHtmlTextWriter(TextWriter writer)
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: base(writer)
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{
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this.InnerWriter = writer;
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}
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public override void WriteAttribute(string name, string value, bool fEncode)
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{
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if (name == "action")
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{
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HttpContext context = HttpContext.Current;
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