這里介紹Ihttpmodule處理請求管道的方法。Response.Redirect的原理是服務器設置返回http狀態(tài)碼為302,然后客戶端執(zhí)行跳轉，用reflector可以看到.net的代碼段。
以下是HttpResponse類的Redirect方法中的跳轉代碼
this.StatusCode = 0x12e;
this.RedirectLocation = url;
所以，我們可以擴展Ihttpmodule來攔截http狀態(tài)碼，強制設為200，同時插入js代碼段來實現(xiàn)新窗口打開。以下是Ihttpmodule的實現(xiàn)代碼
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
namespace ClassLibrary2
...{
public class Class1:System.Web.IHttpModule
...{
public void Init(HttpApplication application)
...{
application.PreSendRequestHeaders += new EventHandler(application_PreSendRequestHeaders);
}
void application_PreSendRequestHeaders(object sender, EventArgs e)
...{
HttpApplication Application = (HttpApplication)sender;
HttpContext context = Application.Context;
if (context.Response.StatusCode == 302)
...{
context.Response.Write("<script>window.open(’"+context.Response.RedirectLocation+"’)</script>");
context.Response.StatusCode = 200;
}
}
public void Dispose()
...{
}
}
}
最后配置一下web.config就可以了
<?xml version="1.0"?>
<configuration>
<system.web>
<compilation debug="true"/>
<authentication mode="Windows"/>
<httpModules>
<add name="MyModule" type="ClassLibrary2.Class1,ClassLibrary2"></add>
</httpModules>
</system.web>
</configuration>
this.Write("<html><head><title>Object moved</title></head><body> ");
this.Write("<h2>Object moved to <a href="" + HttpUtility.HtmlAttributeEncode(url) + "">here</a>.</h2> ");
this.Write("</body></html> ");
