使用asp代码突破163相册的防盗连

网学网为需要ASP的朋友们搜集整理了使用asp代码突破163相册的防盗连相关资料，希望对各位网友有所帮助!

从网上来的代码，，稍微修改了一些地方，其实用的是cache类。。

保存代码为，比如pic.asp
使用:http://www.xxx.com/pic.asp?url=http://www.aaaa.com/log.gif

不光是163，其实就是很多防盗连的图片都可以这个实现。
复制代码 代码如下:
<%
''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.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 i