/**
* 保存头像
* @param $url
* @return string
*/
public function saveAvatar($url)
{
//a.php/1/linkAccess/thumbnail?key=38ezrz&size=256x256&path=/align-right.png
//save image to avatar folder,file name is user_uuid.png
$user = MiniUser::getInstance()->getUser($this->user["id"]);
$avatarName = MiniUtil::getRandomName(8) . ".png";
$savePath = THUMBNAIL_TEMP . "avatar";
$path = $savePath . '/' . $avatarName;
if (!file_exists($savePath)) {
mkdir($savePath);
}
file_put_contents($path, file_get_contents($url));
//save to db
MiniUserMeta::getInstance()->updateMeta($user["id"], "avatar", $avatarName);
//保存原始图片，便于其它迷你云节点可显示该图片的缩略图
MiniUserMeta::getInstance()->updateMeta($user["id"], "avatar_url", $url);
return MiniHttp::getMiniHost() . "assets/thumbnails/avatar/" . $avatarName;
}