网页防盗链-顶誉源代码

------------------------------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;

/// <summary>
///otherLink 的摘要说明
/// </summary>
public class otherLink:IHttpHandler
{
    private const string ERRFILE = "~/images/pagerror.gif";
    public otherLink()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    #region IHttpHandler 成员

    public bool IsReusable
    {
        get { return false; }
    }

    public void ProcessRequest(HttpContext context)
    {
        //约定localhost:11222
        if (context.Request.UrlReferrer.Host == "localhost" &&
            context.Request.UrlReferrer.Port == 11222 )
        {
            context.Response.Expires = 0;
            context.Response.Clear();
            FileInfo file = new FileInfo(context.Request.PhysicalPath);
            context.Response.AddHeader("Content_Disposition", "filename=" + file.Name);
            context.Response.AddHeader("Content_Length", file.Length.ToString());
            string fileExtension = file.Extension.ToLower();
            switch (fileExtension)
            {
                case "jpg":
                    context.Response.ContentType = "image/jpeg";
                    break;
                //......
            }
            context.Response.WriteFile(context.Request.PhysicalPath);
            context.Response.End();
        }
        else
        {
            
            context.Response.WriteFile(context.Request.MapPath(ERRFILE));
            context.Response.ContentType = "text/plain";？
            context.Response.Write("<a href='http://localhost:11222/Default.aspx'>跳转到原始网站！</a>");
            context.Response.End();
        }
    }

    #endregion
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;

/// <summary>
///otherLink 的摘要说明
/// </summary>
public class otherLink:IHttpHandler
{
    private const string ERRFILE = "~/images/pagerror.gif";
    public otherLink()
    {
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    #region IHttpHandler 成员

    public bool IsReusable
    {
        get { return false; }
    }

    public void ProcessRequest(HttpContext context)
    {
        //约定localhost:11222
        if (context.Request.UrlReferrer.Host == "localhost" &&
            context.Request.UrlReferrer.Port == 11222 )
        {
            context.Response.Expires = 0;
            context.Response.Clear();
            FileInfo file = new FileInfo(context.Request.PhysicalPath);
            context.Response.AddHeader("Content_Disposition", "filename=" + file.Name);
            context.Response.AddHeader("Content_Length", file.Length.ToString());
            string fileExtension = file.Extension.ToLower();
            switch (fileExtension)
            {
                case "jpg":
                    context.Response.ContentType = "image/jpeg";
                    break;
                //......
            }
            context.Response.WriteFile(context.Request.PhysicalPath);
            context.Response.End();
        }
        else
        {
            
            context.Response.WriteFile(context.Request.MapPath(ERRFILE));
            context.Response.ContentType = "text/plain";？
            context.Response.Write("<a href='http://localhost:11222/Default.aspx'>跳转到原始网站！</a>");
            context.Response.End();
        }
    }

    #endregion
}

------------------------------------------------------------------------------------------------

------------------------------------------------------------------------------------------------