163的相册有防盗链的功能,在其他域名下引用图片时候会得不到数据.
体现在浏览器上,就是一个红X.
我们利用httprequest和application缓存技术,可以破解这种防盗链.
保存成一个asp文件在你网站目录,就可以用如下的方式调用网易的图片了.除了网易,我想其他加了防盗链的图片都可以用这个方法,比如百度,比如QQ相册.等等
http://你的网站/aspname.asp?url=图片地址
<%
'代码作者:siyizhu 日期:2006-05-22
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
%>
Php版本:
<?php
/**********************************************************************
突破防盗链的显示图片标签[simg],PHP程序部分
作者：t1000
开发论坛：水客坊论坛
*********************************************************************/
ob_start();
$img=$_GET['url'];
$host=$path=str_replace('http://','',$img);
$host=explode('/',$host);
$host=$host[0];
$path=strstr($path,'/');
$fp = fsockopen($host, 80, $errno, $errstr, 30);
if ($fp)
{
@fputs($fp, "GET $path HTTP/1.1
");
@fputs($fp, "Host: $host
");
@fputs($fp, "Accept: */*
");
@fputs($fp, "Referer: http://$host/
");
@fputs($fp, "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)
");
@fputs($fp, "Connection: Close
");
}
$Content = '';
while ($str = fread($fp, 4096))
$Content .= $str;
@fclose($fp);
$pos=strpos($Content,"
");
$head=substr($Content,0,$pos);
$text=substr($Content,$pos+4);
header($head);
echo $text;
?>