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 + "$", RegexOptions.IgnoreCase); |
Match match = regex.Match(path); |
if (match.Success) |
{ |
string trueUrl = UrlRewriteConfigHelp.RewriteBase + rule.To; |
|
context.Items["OriginalUrl"] = context.Request.RawUrl; |
|
if ("POST".Equals(context.Request.HttpMethod)) |
trueUrl = trueUrl.Substring(0, trueUrl.LastIndexOf("?")); |
else |
{ |
int count = match.Groups.Count; |
|
if (count > 1 && match.Groups[1].Value != "") |
{ |
for (int i = 1; i <= count; i++) |
{ |
trueUrl = trueUrl.Replace("$" + 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; |
|
