MIME_TO_FORMAT = {'image/png': 'png', 'image/jpeg': 'jpeg', 'image/gif': 'gif', 'image/webp': 'webp', 'application/pdf': 'pdf', 'text/csv': 'csv', 'application/msword': 'doc', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document': 'docx', 'application/vnd.ms-excel': 'xls', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': 'xlsx', 'text/html': 'html', 'text/plain': 'txt', 'text/markdown': 'md', 'video/x-matroska': 'mkv', 'video/quicktime': 'mov', 'video/mp4': 'mp4', 'video/webm': 'webm', 'video/x-flv': 'flv', 'video/mpeg': 'mpeg', 'video/x-ms-wmv': 'wmv', 'video/3gpp': 'three_gp'}