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asp与图片的问题,急

我要这样的,如:http://www.zhaoxi.net/img.asp?url=图片地址 就好像破解防盗链图片代码那样,但不要占用那么多资源,代码越简单越好,完全没有任何作用也可以,只要像上面那个链接那样最后能显示图片出来就行, ASP或者PHP都行,如果可用,我再加分
答案:这些代码可以有效的破解图片防盗链系统.如网易相册.直接把下面的代码保存成pic.asp,然后用pic.asp?url=图片路径的方式调用即可.增加了缓存技术.效果不错.(如果缓存技术比较慢.可以省略).  

代码:

<%

Sub dimg()

    '盗链判断

    Dim server_v1,server_v2

    server_v1=Cstr(Request.ServerVariables("HTTP_REFERER"))

    server_v2=Cstr(Request.ServerVariables("SERVER_NAME"))

    If Mid(server_v1,8,len(server_v2))<>server_v2 Then

        Response.Write "非法的盗链"

        Response.End

    End If

End Sub

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  

%>
其他:很多方式可以实现啊:
1 在这个asp(img.asp)中做redirect,重定向到你的图片就行,图片就用参数url来标识;
2 在img.asp中,读取磁盘上的图片文件,返回即可(zzzyk一下,这个代码到处都有);
3 apache rewrite,不过有点牛刀杀鸡的感觉了,呵呵

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