开源地址重写

自定义动作可以用来扩展 UrlRewriter.NET组件功能。

以下是创建自定义动作的步骤：

1. 创建一个继承于IRewriteAction接口的类。当动作被请求的时候就会执行。

   public class SetStatusAction : IRewriteAction
   {
   	/// <summary>
   	/// Default constructor.
   	/// </summary>
   	/// <param name=”statusCode”>The status code 
   to set.</param>
   	public SetStatusAction(HttpStatusCode statusCode)
   	{
   		_statusCode = statusCode;
   	}
   
   	/// <summary>
   	/// The status code.
   	/// </summary>
   	public HttpStatusCode StatusCode
   	{
   		get
   		{
   			return _statusCode;
   		}
   		set
   		{
   			_statusCode = value;
   		}
   	}
   
   	/// <summary>
   	/// Executes the action.
   	/// </summary>
   	/// <param name=”context”>The rewriting 
   context.</param>
   	public void Execute(RewriteContext context)
   	{
   		context.StatusCode = StatusCode;
   	}
   
   	/// <summary>
   	/// The Processing directive.
   	/// </summary>
   	public RewriteProcessing Processing
   	{
   		get
   		{
   			if ((int)StatusCode >= 300)
   			{
   				return RewriteProces
   sing.StopProcessing;
   			}
   			else
   			{
   				return RewriteProces
   sing.ContinueProcessing;
   			}
   		}
   	}
   
   	private HttpStatusCode _statusCode;
   }

2. 创建一个解析器类，它继承于 IRewriteActionParser接口。此类的作用主要是读取重写规则，并注册你的动作。

   /// <summary>
   /// Action parser for the set-status action.
   /// </summary>
   public class SetStatusActionParser : IRewriteActionParser
   {
   	/// <summary>
   	/// Default constructor.
   	/// </summary>
   	public SetStatusActionParser()
   	{
   	}
   
   	/// <summary>
   	/// Parses the node.
   	/// </summary>
   	/// <param name=”node”>The node to parse.</param>
   	/// <param name=”config”>The rewriter 
   configuration.</param>
   	/// <returns>The parsed action, or null if no 
   action parsed.</returns>
   	public IRewriteAction Parse(XmlNode node, object config)
   	{
   		XmlNode statusCodeNode = node.
   Attributes.GetNamedItem("status");
   		if (statusCodeNode == null)
   		{
   			return null;
   		}
   		return new SetStatusAction((HttpStatusCode)
   		Convert.ToInt32(statusCodeNode.Value));
   	}
   
   	/// <summary>
   	/// Whether the action allows nested actions.
   	/// </summary>
   	public override bool AllowsNestedActions
   	{
   		get
   		{
   			return false;
   		}
   	}
   
   	/// <summary>
   	/// Whether the action allows attributes.
   	/// </summary>
   	public override bool AllowsAttributes
   	{
   		get
   		{
   			return true;
   		}
   	}
   
   	public string Name
   	{
   		get
   		{
   			return "myaction";
   		}
   	}
   }

3. 注册自定义解析器：

   <register
   	parser="MyNamespace.Parsers.SetStatusActionParser,
   	MyAssembly" />

4. 使用自定义动作：

   <myaction status="405" />

参考

• 动作
• 条件
• 解析器
• 开源地址重写