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<?php
// header('Content-type: image/jpeg');
$url = isset($_REQUEST["url"]) ? esc_url($_REQUEST["url"]) : '';
$token = isset($_REQUEST["token"]) ? $_REQUEST["token"] : '';
$id = isset($_REQUEST["id"]) ? $_REQUEST["id"] : '';
/**
* 何德何能，这个项目居然这么多朋友关注
* 由于之前的方法是N年前的了，今天我重新编写了本代码，对原来的方法进行了一些改进，如下：
* 1.增加对gif的支持
* 2.对源图片的显示
* 3.非常强悍，哪怕url有跳转，也能正常显示最终的图片
* 4.gif不支持水印，其他格式没问题
* 5.支持https了
* 6.对有错的、不存在的图片，进行友好的提示
* by 44886.com 2019-08-26
*/
die();
class ImgBridge{
private $water='';
private $imgUrl='';
private $referer='';
private $ua='MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1';
private $imgCode='';
private $imgHeader='';
private $imgBody='';
private $imgType='';
public function __construct($config=array()){
foreach($config as $key=>$value){
$this->$key=$value;
}
}
public function getImg($imgUrl){
$this->imgUrl=$imgUrl;
/** 处理url */
if(substr($this->imgUrl,0,7)!=='http://' && substr($this->imgUrl,0,8)!=='https://'){
$this->imgUrl='http://'.$this->imgUrl;
}
/** 解析url中的host */
$url_array=parse_url($this->imgUrl);
// var_dump($url_array);
// exit;
/** 设置referer */
$this->referer=$this->referer==""?'http://'.$url_array['host']:$this->referer;
/**开始获取 */
$this->urlOpen();
$this->imgBody;
/**处理错误 */
if($this->imgCode!=200){
$this->error(1);
exit();
}
/**获取图片格式 */
preg_match("/Content-Type: image\/(.+?)\n/sim",$this->imgHeader,$result);
/**看看是不是图片 */
if(!isset($result[1])){
$this->error(2);
exit();
}else{
$this->imgType=$result[1];
}
/** 输出内容 */
$this->out();
}
private function out(){
/** gif 不处理，直接出图 */
if($this->imgType=='gif'){
header("Content-Type: image/gif");
echo $this->imgBody;
exit();
}
header("Content-Type: image/png");
/** 其他类型的，加水印 */
$im=imagecreatefromstring($this->imgBody);
$white = imagecolorallocate($im, 255, 255, 255);
/*加上水印*/
// if($this->water){
// imagettftext($im, 12, 0, 20, 20, $white, "/fonts/hwxh.ttf", $this->water);
// }
imagepng($im);
}
private function error($err){
header("Content-Type: image/jpeg");
$im=imagecreatefromstring(file_get_contents('./default.jpg'));
imagejpeg($im);
}
private function urlOpen()
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->imgUrl);
curl_setopt($ch, CURLOPT_USERAGENT, $this->ua);
curl_setopt ($ch,CURLOPT_REFERER,$this->referer);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
/**跳转也要 */
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
/** 支持https */
$opt[CURLOPT_SSL_VERIFYHOST] = 2;
$opt[CURLOPT_SSL_VERIFYPEER] = FALSE;
curl_setopt_array($ch, $opt);
$response = curl_exec($ch);
$this->imgCode=curl_getinfo($ch, CURLINFO_HTTP_CODE) ;
if ($this->imgCode == '200') {
$headerSize = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
$this->imgHeader = substr($response, 0, $headerSize);
$this->imgBody = substr($response, $headerSize);
return ;
}
curl_close($ch);
}
}
if( md5(AUTH_KEY.$url.$id) == $token){
$img=new ImgBridge(array('referer'=>B2_HOME_URI));
$img->getImg($url);
}else{
return;
}