<?

/*
$imgPath 源图片路径
$maxWidth 缩小后最大宽度
$maxHeight 缩小后最大高度
$destPath 目标路径，留空则直接输出
*/
function resizeImg($imgPath, $maxWidth, $maxHeight, $destPath = '', $isdel = false) {
	if(stristr($imgPath, '.png')) {
		$img = @imagecreatefrompng($imgPath);
	} else {
		$img = @imagecreatefromjpeg($imgPath);
	}
	if(!$img) {
		if($isdel) {
			@unlink($imgPath);
		}
		exit;
	}
	$w = $w_o = imagesx($img);
	$h = $h_o = imagesy($img);

	if($w > $maxWidth) {
	$h = intval($h*$maxWidth/$w);
	$w = $maxWidth;
	}
	if($h > $maxHeight) {
	$w = intval($w*$maxHeight/$h);
	$h = $maxHeight;
	}
	if($w>$w_o || $h>$h_o ) {
		$w = $w_o;
		$h = $h_o;
	}
	//echo $w.",".$h;exit;
	$img2 = imagecreatetruecolor($w, $h); 
	imagecopyresampled($img2, $img, 0, 0, 0, 0, $w, $h, $w_o, $h_o); 
	if($destPath) {
	imagejpeg($img2, $destPath, 80); 
	} else {
	header("Content-Type:image/jpeg"); 
	imagejpeg($img2, '', 80); 
	}

	imagedestroy($img2);
	imagedestroy($img); 
}

function check_domain($url, $check_domain) {
	$pos1 = strpos($url, "//");
	if($pos1 === false) return false;
	$pos2 = strpos($url, "/", $pos1+2);
	if($pos2 === false) return false;
	$domain = substr($url, $pos1+2, $pos2-$pos1-2);
	$len1 = strlen($domain);
	$len2 = strlen($check_domain);
	$pos = stripos($domain, $check_domain);
	if($pos === false) return false;
	if($len1 == $len2+$pos) return true;
	return false;
}

$width = intval($_REQUEST['w']);
$height = intval($_REQUEST['h']);
if($width <= 0 || $height <= 0) exit;

$pic = htmlentities($_REQUEST['p']);
if(!$pic) exit;

$root = dirname(__FILE__);
$destPath = $root."/images/thumb/".md5($pic).".jpg";

if(is_file($destPath)) {
	header("Content-Type:image/jpeg");
	echo file_get_contents($destPath);
	exit;
}
function httpget($url) {
	$c = curl_init($url);
	curl_setopt($c, CURLOPT_RETURNTRANSFER, 1); 
	curl_setopt($c, CURLOPT_TIMEOUT, 10);
	curl_setopt($c, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($c, CURLOPT_SSL_VERIFYHOST, 0); 
	
	$s = curl_exec($c);
	curl_close($c);
	return $s;
}
$ishttp = false;
if(substr($pic, 0, 4) == 'http') {
	$domains = array('360buyimg.com', '127.net', 'duifuli.com', 'weibo.com');
	$suc = false;
	foreach($domains as $domain) {
		if(check_domain($pic, $domain)) {
			$suc = true;
			break;
		}
	}
	if(!$suc) die("domain error!");
	if(strstr($pic,'360buyimg') || strstr($pic,'yanxuan')) {
		$pic = str_replace('http://', 'https://', $pic);
		header("Location: ".$pic);
		exit;
	}
	$ext = end(explode('.', $pic));
	if(strlen($ext) > 4) $ext = 'data';
	$filepath = $root."/img_".md5(microtime()."_".$pic).".".$ext;
	

	$s = httpget($pic);
	//if(!$s && substr($pic, 0, 5) == 'https') {
	//	$s = httpget(str_replace('https://', 'http://', $pic));
	//}
	if(!$s) exit;
	file_put_contents($filepath, $s);
	$ishttp = true;
} else {
	$filepath = $root."/../".$pic;
	if(!is_file($filepath)) {
		$filepath = $root."/../backstage/".$pic;
		if(!is_file($filepath)) exit;
	}
}


//echo "vvvvvvvvv";
//echo $destPath;
//exit;
if($width > 5000 && $ishttp) {
	if(stristr($pic, '.png')) {
		header("Content-Type:image/png");
	} else {
		header("Content-Type:image/jpeg");
	}
	rename($filepath, $destPath);
	echo file_get_contents($destPath);
} else {
	resizeImg($filepath, $width, $height, $destPath, $ishttp?true:false);
	if($ishttp) @unlink($filepath);
	header("Content-Type:image/jpeg");
	echo file_get_contents($destPath);
}