protected function uploadToS3(File $file)
 {
     $key = sfConfig::get('op_plugin_channel_s3_key');
     $secret = sfConfig::get('op_plugin_channel_s3_secret');
     $bucket = sfConfig::get('op_plugin_channel_s3_bucket');
     if ($key && $secret && $bucket) {
         opPluginChannelServerToolkit::uploadFileToS3($key, $secret, $bucket, $file);
     }
 }