.NET下URL重寫及PostBack處理

URL重寫是截取傳入Web 請求並自動將請求重定向到其他 URL 的過程。
 
比如:瀏覽器發來請求 http://localhost:90/URLRewriter/1.html ，
 
服務器自動將這個請求中定向爲http://localhost:90/URLRewriter/url.aspx?id=1
 
URLRewriter下載編譯後提取其中的URLRewriter.dll和ActionlessForm.dll
 
一、URL重寫
 
項目引用URLRewriter.dll
 
web.config配置：

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
  <configSections>
    <section name="RewriterConfig" type="URLRewriter.Config.RewriterConfigSerializerSectionHandler, URLRewriter" />
  </configSections>
  
  <RewriterConfig>
    <Rules>
      <RewriterRule>
        <LookFor>~/URLRewriter/(.[0-9]*)\.html</LookFor>
        <SendTo>~/URLRewriter/url.aspx?id=$1</SendTo>
      </RewriterRule>
      <RewriterRule>
        <LookFor>~/web</LookFor>
        <SendTo>~/URLRewriter/url.aspx</SendTo>
      </RewriterRule>
    </Rules>
  </RewriterConfig>
  
  <system.web>
    <httpHandlers>
      <!--URLRewriter begin 使用 HTTP 處理程序執行重寫-->
      <!--<add verb="*" path="*.aspx" type="URLRewriter.RewriterFactoryHandler, URLRewriter" />
      <add verb="*" path="*.html" type="URLRewriter.RewriterFactoryHandler, URLRewriter" />-->
      <!--URLRewriter end-->
    </httpHandlers>
        
    <httpModules>
      <!--URLRewriter begin 使用 HTTP 模塊執行重寫 -->
      <add type="URLRewriter.ModuleRewriter, URLRewriter" name="ModuleRewriter"/>
      <!--URLRewriter end-->
    </httpModules>
  </system.web>
  
</configuration>

 

IIS配置：

網站--屬性--主目錄--配置--插入--C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_isapi.dll

將文件是否存在 勾去掉

二、處理PostBack回發

ActionlessForm.dll以重寫Form的方式用於處理PostBack回發後URL變爲原始地址

項目引用ActionlessForm.dll在頁面中註冊一下

<%@ Register TagPrefix="skm" Namespace="ActionlessForm" Assembly="ActionlessForm" %>

將頁面中的<form runat="server"></form>替換成:<skm:form id="form1" runat="server"></skm:form>

注：以這種方式處理回發將會在設計器中查看的時候爲錯誤提示Form不可用

所以採用以下方法處理：

在微軟的URLRewriter類庫中添加以下類之後編譯

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

/// <summary>
/// FormRewriter 的摘要說明
/// </summary>
namespace URLRewriter.Form
{
    public class FormRewriterControlAdapter : System.Web.UI.Adapters.ControlAdapter
    {
        public FormRewriterControlAdapter()
        {
        }

        protected override void Render(HtmlTextWriter writer)
        {
            base.Render(new RewriteFormHtmlTextWriter(writer));
        }
    }

    public class RewriteFormHtmlTextWriter : HtmlTextWriter
    {
        public RewriteFormHtmlTextWriter(HtmlTextWriter writer)
            : base(writer)
        {
            base.InnerWriter = writer.InnerWriter;
        }
        public RewriteFormHtmlTextWriter(System.IO.TextWriter writer)
            : base(writer)
        {
            base.InnerWriter = writer;
        }

        public override void WriteAttribute(string name, string value, bool fEncode)
        {
            //If the attribute we are writing is the "action" attribute, and we are not on a sub-control, 
            //then replace the value to write with the raw URL of the request - which ensures that we'll
            //preserve the PathInfo value on postback scenarios
            if (name == "action")
            {
                HttpContext context = HttpContext.Current;
                if (context.Items["ActionAlreadyWritten"] == null)
                {
                    //We will use the Request.RawUrl property within ASP.NET to retrieve the origional 
                    //URL before it was re-written.
                    value = context.Request.RawUrl;
                    //Indicate that we've already rewritten the <form>'s action attribute to prevent
                    //us from rewriting a sub-control under the <form> control
                    context.Items["ActionAlreadyWritten"] = true;
                }
            }
            base.WriteAttribute(name, value, fEncode);
        }
    }

}

在App_Browsers文件夾下創建Form.browser

<browsers>
  <browser refID="Default">
    <controlAdapters>
      <adapter controlType="System.Web.UI.HtmlControls.HtmlForm"
               adapterType="URLRewriter.Form.FormRewriterControlAdapter" />
    </controlAdapters>
  </browser>
</browsers>

 

這樣就不需要引用ActionlessForm.dll也不需要改變Form了，只要引用URLRewriter.dll就可以了

三、在處理重寫成html的時候本來網站中的html頁面將會不能使用

使用以上方式將不存在找個問題

如果還不行可以在<compilation debug="true">節點下添加

<buildProviders>
        <add extension=".html" type="System.Web.Compilation.PageBuildProvider" />
</buildProviders>

在<httpHandlers>節點下添加（如果之前使用的是http處理程序執行重寫的，請寫在前面）

<add path="*.html" verb="*" type="System.Web.UI.PageHandlerFactory" validate="true"/>

以下爲IIS7.0配置方式

IIS7不再使用URLRewriter.dll組件了，請使用IIS7的URLWRITER，下載rewrite_2.0_rtw並進行安裝，配置