教大家个方法，采集防盗链的站的图片帝国cms

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【《帝国网站管理系统》零基础实例入门教程】 [第 11 楼]

<?php
@set_time_limit(60);
$allowgz = true;
$action = $_GET['action'] ? $_GET['action'] : $_POST['action'];
$self = substr($_SERVER['PHP_SELF'],strrpos($_SERVER['PHP_SELF'],'/')+1,strlen($_SERVER['PHP_SELF']));

$refer = $_SERVER['HTTP_REFERER'];
$rarray = parse_url($refer);
$rhost = strtolower($rarray['host']);
$lhost = strtolower($_SERVER['HTTP_HOST']);

$url = $_POST['url'] ? $_POST['url'] : $_GET['url'];
$url = $url ? $url : ($_SERVER['QUERY_STRING'] ? $_SERVER['QUERY_STRING'] : NULL);
$url = trim($url);
if (!$url) exit;
$url_d = urldecode($url);

$arrUrl = @parse_url($url_d);
if ($arrUrl['scheme'] != 'http' || $arrUrl['host'] == $lhost){
      header("Location: $url");
      exit;
}

$ext = strtolower(substr($url,strrpos($url,'.')+1));
if (!strstr(',jpg,bmp,gif,png,',','.$ext.',')) {
      header("Location: $url");
      exit;
}

$url = urldecode($url);

$ret = fetchImg($url);
if ($ret['success']){
      echo $ret['content'];
      flush();
} else {
      header($url);
}
exit;

function unTomChunked($content){
      $pos = strpos($content,"\x0d\x0a");
      if($pos > 0 && $pos < 20){
            $content = substr($content,$pos+2);
      }
      $content = preg_replace("/\x0d\x0a[0-9a-z]+?\x0d\x0a/is",'',$content);
      if(substr($content,-2) == "\r\n") $content = substr($content,0,strlen($content)-2);
      $content = str_replace("\r\n2000\r\n",'',$content);
      return $content;
}

function unGzip($content){
      $singal = "\x1F\x8B\x08";
      $slen = strlen($singal);
      if(substr($content,0,$slen) == $singal){
            $content = substr($content,10);
            $content = gzinflate($content);
      }
      return $content;
}

function unChunked($content){
      $pos = strpos($content,"\x0d\x0a");
      if($pos > 0 && $pos < 20){
            $content = substr($content,$pos+2);
      }
      $content = preg_replace("/\x0d\x0a[0-9a-f]+?\x0d\x0a/is",'',$content);
      if(substr($content,-2) == "\r\n") $content = substr($content,0,strlen($content)-2);
      $content = str_replace("\r\n2000\r\n",'',$content);
      return $content;
}

function fetchImg($url,$nesting=false,$skipextchk=false){
      global $allowgz,$allowexts,$timeout;
      $allowexts = $allowexts ? ','.$allowexts.',' : ',jpg,bmp,gif,png,';
      $timeout = intval($timeout);
      $timeout = $timeout ? $timeout : 7;
      @$arrUrl = parse_url($url);
      $disallowedext = false;
      $status = false;
      $ext = strtolower(substr($url,strrpos($url,'.')+1));
      if ($skipextchk){
            $ext = 'jpg';
      }
      if (!strstr($allowexts,','.$ext.',')) {
            $disallowedext = true;
      }
      if(!$disallowedext && $arrUrl['scheme'] == 'http') {
            if(strstr(strtolower($arrUrl['host']),'.163.com') || strstr(strtolower($arrUrl['host']),'.piclib.net')){
                     $strRef = '';
            }else{
                     $strRef = 'http://'.$arrUrl['host'].'/';
            }
            $arrUrl['uri']  = ($arrUrl['path'] ? $arrUrl['path']:'') . ($arrUrl['query'] ? '?'.$arrUrl['query']:'') . ($arrUrl['fragment'] ? '#'.$arrUrl['fragment']:'');
            $arrUrl['port'] = $arrUrl['port'] ? $arrUrl['port'] : '80';
            $strRequest  = "GET ".$arrUrl['uri']." HTTP/1.0\r\n";
            $strRequest .= "Host: ".$arrUrl['host']."\r\n";
            $strRequest .= "Accept: */*\r\n";
            if ($allowgz){
                     $strRequest .= "Accept-Encoding: gzip, deflate\r\n";
            }
            if($strRef!='') {
                     $strRequest .= "Referer:$strRef\r\n";
            }
            $strRequest .= "User-Agent: Mozilla/4.0 (compatible; MSIE 4.00; Windows 2000)\r\n";
            $strRequest .= "Pragma: no-cache\r\n";
            $strRequest .= "Cache-Control: no-cache\r\n";
            $strRequest .= "Connection: close\r\n\r\n";

            @$fp = fsockopen($arrUrl['host'],$arrUrl['port'],$intError, $strError, $timeout);
            if (!$fp){
                     return false;
            }
            @fwrite($fp,$strRequest);

            $bolHeader = true;
            $removed = false;
            while($block = fgets($fp,1024)){
                     if($bolHeader){
                              if($block=="\r\n"){
                                    $bolHeader = false;
                              }
                              $headers .= $block;
                              if (!$removed && preg_match("/HTTP\/1\.\d?\s+?302\s+?.*?/is",$block)){
                                    $removed = true;
                              }
                     } else {
                              break;
                     }
            }
            $content = $block;
            if (!$removed){
                     while ($block = fread($fp,10240)) {
                              $content .= $block;
                     }
            }
            fclose($fp);
            $status = true;
      }
      if((strstr($arrUrl['host'],'.tom.com') || strstr($arrUrl['host'],'.52vcd.com')) && !empty($content)){
            unTomChunked($content);
            $unced = true;
      }
      $header_t = strtolower($headers);
      if((strstr($header_t,' chunked') || strstr($header_t,':chunked')) && !$unced){
            $content = unChunked($content);
      }
      if(strstr($header_t,' gzip') || strstr($header_t,':gzip') || substr($content,0,3) == "\x1f\x8b\x08"){
            $content = unGzip($content);
      }
      if (!$nesting && $removed){
            if(preg_match("/Location:\s+?(.*?)(?=\r|\n|\s)/is",$headers,$match)){
                     $url = $match[1];
                     return fetchImg($url,true,$skipextchk);
            } else {
                     return false;
            }
      }
      if ($nesting){
            return array('url'=>$url,'success'=>$status,'headers'=>$headers,'content'=>$content);
      } else {
            return array('success'=>$status,'headers'=>$headers,'content'=>$content);
      }
}
?>

这个是代码