显示 163 相册的代码

<%
'文件地址?url=163图片地址
Dim url, body, myCache

url = Request.QueryString("url")
if url = "" then
 url = "
http://img251.photo.163.com/iamcomet/30340115/818312712.jpg"
end if

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
%>

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