Hi,

I'm trying to upload a video via the following methods:
http://upload.kewego.com/api/uploadFile
http://upload.kewego.com/api/prepareUpload
http://upload.kewego.com/api/finishUpload

But I when I tried the first call I got the following error:
No input file specified

I don't understand why.
This is a piece of my code
  function request($url, $args=array(), $use_app_token=true) {
    $req = curl_init($url);

    $args['APIFormat'] = 'json';
    if ($use_app_token) {
        $args['appToken'] = $this->request(
          'http://api.kewego.com/app/getToken/',
          array('appKey' => Configure::read('kewego.api.key')),
          false
        )->message->appToken;
    }
   
    curl_setopt($req, CURLOPT_HEADER, false);
    curl_setopt($req, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($req, CURLOPT_POST, true);
    curl_setopt($req, CURLOPT_HTTPHEADER, array('Expect:'));
    // curl_setopt($req, CURLOPT_TIMEOUT, 100);
    curl_setopt($req, CURLOPT_POSTFIELDS, $args);
    if (($response = curl_exec($req)) === false) {
      throw new Exception(curl_error($req));
    }
    curl_close($req);
    echo $response;
    $json_response = json_decode($response)->kewego_response;
   
    // Basic error handling.
    if (property_exists($json_response, 'kewego_error')) {
      echo $response;
      throw new Exception($json_response->kewego_error);
    }
    return $json_response;
  }

  function add_video($video) {
    $video_file = video_tmp_dir.$video;
    if (!file_exists($video_file)) {
      throw new Exception('File '.$video_file.' doesn\'t exists.');
    }
    $upload_file_token = $this->request('http://upload.kewego.com/api/uploadFile/', array('file' => '@'.$video_file))->message->upload_file_token;
    return $upload_file_token;
}

Any idea ?