|
gurl 要下载的图片地址
$rfurl 来路。如果目标图像做了防盗链设置，可以绕过。
$filename 下载图片保存的文件名，相对路径，不要用realpath
$gcookie 调整cookie 伪造的cookie
$JumpCount 跳转计数
$maxtime 最大次数
<FONT style="COLOR: #ff0000">调用方法：DownImageKeep(“http://www.baidu.com/img/baidu_jgylogo2.gif”,”http://baidu.com”,”a.gif”,”",10);
<div class="codetitle"><a style="CURSOR: pointer" data="87789" class="copybut" id="copybut87789" onclick="doCopy('code87789')"> 代码如下:<div class="codebody" id="code87789">
<?php
function DownImageKeep($gurl,$rfurl,$filename,$gcookie="",$JumpCount=0,$maxtime=30)
{
$urlinfos = GetHostInfo($gurl);
$ghost = trim($urlinfos['host']);
if($ghost=='')
{
return FALSE;
}
$gquery = $urlinfos['query'];
if($gcookie=="" && !empty($rfurl))
{
$gcookie = RefurlCookie($rfurl);
}
$sessionQuery = "GET $gquery HTTP/1.1rn";
$sessionQuery .= "Host: $ghostrn";
$sessionQuery .= "Referer: $rfurlrn";
$sessionQuery .= "Accept: /rn";
$sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)rn";
if($gcookie!="" && !preg_match("/[rn]/",$gcookie))
{
$sessionQuery .= $gcookie."rn";
}
$sessionQuery .= "Connection: Keep-Alivernrn";
$errno = "";
$errstr = "";
$m_fp = fsockopen($ghost,80,$errno,$errstr,10);
fwrite($m_fp,$sessionQuery);
$lnum = 0;
//获取详细应答头
$m_httphead = Array();
$httpstas = explode(" ",fgets($m_fp,256));
$m_httphead["http-edition"] = trim($httpstas[0]);
$m_httphead["http-state"] = trim($httpstas[1]);
while(!feof($m_fp))
{
$line = trim(fgets($m_fp,256));
if($line == "" || $lnum>100)
{
break;
}
$hkey = "";
$hvalue = "";
$v = 0;
for($i=0; $i<strlen($line); $i++)
{
if($v==1)
{
$hvalue .= $line[$i];
}
if($line[$i]==":")
{
$v = 1;
}
if($v==0)
{
$hkey .= $line[$i];
}
}
$hkey = trim($hkey);
if($hkey!="")
{
$m_httphead[strtolower($hkey)] = trim($hvalue);
}
}
//分析返回记录
if(preg_match("/^3/",$m_httphead["http-state"]))
{
if(isset($m_httphead["location"]) && $JumpCount<3)
{
$JumpCount++;
DownImageKeep($gurl,$gcookie,$JumpCount);
}
else
{
return FALSE;
}
}
if(!preg_match("/^2/",$m_httphead["http-state"]))
{
return FALSE;
}
if(!isset($m_httphead))
{
return FALSE;
}
$contentLength = $m_httphead['content-length'];
//保存文件
$fp = fopen($filename,"w") or die("写入文件：{$filename} 失败！");
$i=0;
$okdata = "";
$starttime = time();
while(!feof($m_fp))
{
$okdata .= fgetc($m_fp);
$i++;
//超时结束
if(time()-$starttime>$maxtime)
{
break;
}
//到达指定大小结束
if($i >= $contentLength)
{
break;
}
}
if($okdata!="")
{
fwrite($fp,$okdata);
}
fclose($fp);
if($okdata=="")
{
@unlink($filename);
fclose($m_fp);
return FALSE;
}
fclose($m_fp);
return TRUE;
}
/
获得某页面返回的Cookie信息
@access public
@param string $gurl 调整地址
@return string
/
function RefurlCookie($gurl)
{
global $gcookie,$lastRfurl;
$gurl = trim($gurl);
if(!empty($gcookie) && $lastRfurl==$gurl)
{
return $gcookie;
}
else
{
$lastRfurl=$gurl;
}
if(trim($gurl)=='')
{
return '';
}
$urlinfos = GetHostInfo($gurl);
$ghost = $urlinfos['host'];
$gquery = $urlinfos['query'];
$sessionQuery = "GET $gquery HTTP/1.1rn";
$sessionQuery .= "Host: $ghostrn";
$sessionQuery .= "Accept: /rn";
$sessionQuery .= "User-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)rn";
$sessionQuery .= "Connection: Closernrn";
$errno = "";
$errstr = "";
$m_fp = fsockopen($ghost,10) or die($ghost.'
');
fwrite($m_fp,$sessionQuery);
$lnum = 0;
//获取详细应答头
$gcookie = "";
while(!feof($m_fp))
{
$line = trim(fgets($m_fp,256));
if($line == "" || $lnum>100)
{
break;
}
else
{
if(preg_match("/^cookie/i",$line))
{
$gcookie = $line;
break;
}
}
}
fclose($m_fp);
return $gcookie;
}
/
获得网址的host和query部份
@access public
@param string $gurl 调整地址
@return string
/
function GetHostInfo($gurl)
{
$gurl = preg_replace("/^http:///i","",trim($gurl));
$garr['host'] = preg_replace("//(.)$/i",$gurl);
$garr['query'] = "/".preg_replace("/^([^/])//i",$gurl);
return $garr;
}
?>
（编辑：李大同）
【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!
|
