/**
* 获取请求Url.
*
* @param string $key
* @param int $expire
* @param string $bucket
*
* @return string
*/
public function getUrl($key, $expire = 3600, $bucket = null)
{
return $this->client->generatePresignedUrl([OSSOptions::BUCKET => $this->getBucket($bucket), OSSOptions::KEY => $key, OSSOptions::EXPIRES => $expire]);
}
