七牛云异步第三方资源抓取

    /*
    * 七牛云异步第三方资源抓取
    * $img_url 文件url
    * @return Qiniu\Http\Response Object
    */
    public function qiniuFetch($img_url)
    {
        $secrectKey = set('secrectKey');
        $accessKey = set('accessKey');
        $qiniubucket = set('qiniubucket');
        $qiniudomain = set('qiniudomain');
        $zone = 'z2'; // 华东:z0;华北z1;华南:z2;北美:na0;东南亚:as0

        $file_dir = 'article/'.date('Ymd').'/'; // 文件路径
        $file_type = pathinfo(parse_url($img_url)['path'])['extension'];// 文件类型（文件直接上传，七牛云不会指定文件类型，需要自己定义）
        $file_name = time() . uniqid().'.'.$file_type; // 文件名

        $bodyArr = ["url" => $img_url, "bucket" => $qiniubucket, "key" => $file_dir . $file_name];
        $body = json_encode($bodyArr);

        $this->auth = new Auth($accessKey, $secrectKey);
        $url = 'http://api-'.$zone.'.qiniu.com/sisyphus/fetch';
        $method = 'POST';
        $contentType = 'application/json';
        $rtcToken = $this->auth->authorizationV2($url, $method, $body, $contentType);
        $rtcToken['Content-Type'] = $contentType;
        $result =  Client::post($url, $body, $rtcToken);

        // 成功则返回七牛云url，失败则返回原url
        if ($result->statusCode == 200) {
            $data['img_yun_url'] = 'http://'.$qiniudomain.'/'.$file_dir . $file_name;
        } else {
            $data['img_yun_url'] = $img_url;
        }
        return $data;
    }