从根本上破解图片防盗链的方法

现在各大网站的软件不但使用盗链措施，而且图片也防止别人引用。新浪博客、网易相册、百度空间都是这样。

转引别人的文章还得把图片先下载下来再传到自己空间里，然后再插入到日志里，真累死人！况且当自己的空间太小，放不了这么多图片怎么办？

另外当别人用在他自己网站上的破解代码失效时，你所引用的图片就告不能显示，全是叉叉，哈哈，干瞪眼去吧你！

下面的这段代码可破解这种图片盗链，可以说能从根本上进行破解！因为破解代码就在你的网站根目录，其中奥妙就不用我说了吧？

将下面代码另存为 ShowPic.asp 存放到你的网站根目录。

程序代码：
<%
Dim url, body, myCache
url = Request.QueryString(“url”)
   Set myCache = new cache
   myCache.name = “picindex”&url
   If myCache.valid Then
           body = myCache.value
   Else
           body = GetWebData(url)
           myCache.add body,dateadd(“d”,1,now)
   End If
   If Err.Number = 0 Then
         Response.CharSet = “UTF-8”
         Response.ContentType = “application/octet-stream”
         Response.BinaryWrite body
         Response.Flush
   Else
         Wscript.Echo Err.Description
   End if
‘取得数据
Public Function GetWebData(ByVal strUrl)
Dim curlpath
curlpath = Mid(strUrl,1,Instr(8,strUrl,”/”))
Dim Retrieval
Set Retrieval = Server.CreateObject(“Microsoft.XMLHTTP”)
With Retrieval
.Open “Get”, strUrl, False,””,””
.setRequestHeader “Referer”, curlpath
.Send
GetWebData =.ResponseBody
End With
Set Retrieval = Nothing
End Function

‘cache类
class Cache
         private obj                                 ‘cache内容
         private expireTime                 ‘过期时间
         private expireTimeName         ‘过期时间application名
         private cacheName                 ‘cache内容application名
         private path                         ‘url
       
         private sub class_initialize()
                 path=request.servervariables(“url”)
                 path=left(path,instrRev(path,”/”))
         end sub
       
         private sub class_terminate()
         end sub
       
         public property get blEmpty
                 ‘是否为空
                 if isempty(obj) then
                         blEmpty=true
                 else
                         blEmpty=false
                 end if
         end property
       
         public property get valid
                 ‘是否可用(过期)
                 if isempty(obj) or not isDate(expireTime) then
                         valid=false
                 elseif CDate(expireTime)<now then
                                 valid=false
                 else
                         valid=true
                 end if
         end property
       
         public property let name(str)
                 ‘设置cache名
                 cacheName=str & path
                 obj=application(cacheName)
                 expireTimeName=str & “expires” & path
                 expireTime=application(expireTimeName)
         end property
       
         public property let expires(tm)
                 ‘重设置过期时间
                 expireTime=tm
                 application.lock
                 application(expireTimeName)=expireTime
                 application.unlock
         end property
       
         public sub add(var,expire)
                 ‘赋值
                 if isempty(var) or not isDate(expire) then
                         exit sub
                 end if
                 obj=var
                 expireTime=expire
                 application.lock
                 application(cacheName)=obj
                 application(expireTimeName)=expireTime
                 application.unlock
         end sub
       
         public property get value
                 ‘取值
                 if isempty(obj) or not isDate(expireTime) then
                        value=null
                 elseif CDate(expireTime)<now then
                        value=null
                 else
                        value=obj
                 end if
         end property
       
         public sub makeEmpty()
                 ‘释放application
                 application.lock
                 application(cacheName)=empty
                 application(expireTimeName)=empty
                 application.unlock
                 obj=empty
                 expireTime=empty
         end sub
       
         public function equal(var2)
                 ‘比较
                 if typename(obj)<>typename(var2) then
                         equal=false
                 elseif typename(obj)=”Object” then
                         if obj is var2 then
                                 equal=true
                         else
                                 equal=false
                         end if
                 elseif typename(obj)=”Variant()” then
                         if join(obj,”^”)=join(var2,”^”) then
                                 equal=true
                         else
                                 equal=false
                         end if
                 else
                         if obj=var2 then
                                 equal=true
                         else
                                 equal=false
                         end if
                 end if
         end function
end class
%>

使用方法：在需要引用某个网站的图片时，图片地址前加上如下代码：http://您的域名/ShowPic.asp?url=

本站的：http://01.8866.org:8080/Blog/ShowPic.asp?url=