‘盗链’ 标签下的文章:

     经常在论坛发帖或初建站采集的时候去是直接拿别人的图片或文件的链接来用用..    今天自已新弄个垃圾站时,采集又遇上这个.. 以前没常注意只是想算了算了..

    随便搜一下代码.放这asp的 :

  <%
'盗链判断
'If Instr(Request.ServerVariables("http_referer"),"http://"&Request.ServerVariables("server_name")&"") = 0 Then
'Response.Write "非法链接"
'Response.End
'End If

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.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
%>

 上面这个好像有点问题，本地可以，服务器上就挂了。但还有

<%
function getImg(surl)
           dim xmlHttp
           set xmlHttp=server.createobject("MSXML2.XMLHTTP")
           xmlHttp.open "GET",surl,false
           xmlHttp.send
           if xmlHttp.readystate<>4 then
            exit function
           end if
            getImg=xmlhttp.responsebody
           set xmlHttp=nothing
end function
function showimage(sUrl)
           dim imgs
           imgs=getImg(sUrl)
           Response.ContentType = "image/gif"
           Response.BinaryWrite imgs
end function
surl=request("url")
showimage(surl)
%>

 php的缓存技术我比较喜欢,呵呵, 当然应用起来也方便得多. 相关的突破代码也有.

<?

if(substr($_GET[url], 0, 7)!="http://")exit;

readfile($_GET[url]);

?>

应用的时候,比如: 取名***.asp或php ,   发的时候写上

   ***.asp/php?=图片或文件地址

真的懒得弄的话。我也介绍个

http://www.hongkongfans.cn/后面加地址，记得去掉http://

例：http://i5.17173.itc.cn/2009//newgame/2009/01/30/1294_01301921_03.jpg

http://www.hongkongfans.cn/i5.17173.itc.cn/2009//newgame/2009/01/30/1294_01301921_03.jpg