整個流程分二步走:
1、用一個xml文件來存儲重寫規則,其中這些規則是一些簡單的正則表達式
2、實現IHttpHandler接口
首先看一下xml文件的格式:
程序代碼<?xml version="1.0" encoding="utf-8" ?>
<root>
<regex>
<!--重寫以後的虛擬地址-->
<b><![CDATA[xxx,(?<id>[0-9]+).html$]]></b>
<!--實際地址-->
<a><![CDATA[xxx.aspx?id=${id}]]></a>
</regex>
</root>
相信上面的xml大家都能看懂.
程序代碼using System;
using System.IO;
using System.Data;
using System.Configuration;
using System.Collections.Generic;
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;
using System.Text;
using System.Text.RegularExpressions;
using Microsoft.VisualBasic;
//RegexInfo結構,用來存儲從xml文件中讀取到的數據
public struct RegexInfo
{
public string _before;
public string _after;
public RegexInfo(string before, string after)
{
_before = before.ToLower();
_after = after.ToLower();
}
}
//ipFilter結構,用來存儲被封的IP
public struct ipFilter
{
public string _ip;
public ipFilter(string ip)
{
_ip = ip;
}
}
public class HtmlHttpHandler : IHttpHandler //實現IHttpHandler接口
{
private List<RegexInfo> _regex_list = new List<RegexInfo>();
private List<ipFilter> _ip_filter = new List<ipFilter>();
public HtmlHttpHandler()
{
DataSet ds = new DataSet();
//讀取url重寫規則文件,並寫入RegexInfo結構的實例中
ds.ReadXml(System.Web.HttpContext.Current.Server.MapPath("~/App_Data/Regexs.xml"));
foreach (DataRow r in ds.Tables["regex"].Rows)
_regex_list.Add(new RegexInfo(((string)r["b"]).Trim(), ((string)r["a"]).Trim()));
ds.Reset();
//讀取被封的IP列表
ds.ReadXml(System.Web.HttpContext.Current.Server.MapPath("~/App_Data/ipFilter.xml"));
foreach(DataRow r in ds.Tables["IpFilters"].Rows)
_ip_filter.Add(new ipFilter((string)r["ip"]));
}
public void ProcessRequest(HttpContext context)
{
string _ip = context.Request.UserHostAddress; //獲取IP
foreach (ipFilter r in _ip_filter)
{
if (_ip == r._ip)
{
context.Response.Write("對不起,您的IP:"+_ip+"已被限制!");
context.Response.End();
}
}
string path = context.Request.Path.ToLower(); //獲取當前訪問的重寫過的虛假URL
foreach (RegexInfo r in _regex_list)
path = Regex.Replace(path, r._before, r._after); //匹配出其真實的URL
context.Server.Execute(path);
}
// Override the IsReusable property.
public bool IsReusable
{
get { return true; }
}
}
OK,IHttpHandler接口就被實現了,下面稍配一下web.config就可以實現URL重寫了
在web.config的<system.web></system.web>中加入
程序代碼<httpHandlers>
<add verb="*" path="*.html" type="HtmlHttpHandler"/>
</httpHandlers>
表示後綴名爲.html的文件全部交給HtmlhttpHandler類去處理
最後配一下iis就行了
本blog的url重寫就是這樣實現的,至於簡繁的轉換,你可以加到ProcessRequest中,至於如何實現轉換,到這個blog上找找吧:)