seregazhuk\PinterestBot\Api\Request::makeHeadersForUpload PHP Method

    protected function makeHeadersForUpload()
    {
        $delimiter = '-------------' . uniqid();
        $this->buildFilePostData($delimiter);
        return ['Content-Type: multipart/form-data; boundary=' . $delimiter, 'Content-Length: ' . strlen($this->postFileData)];
    }