Function _sanitize_filename

Lib/zipfile/__init__.py:404–420

Terminate the file name at the first null byte and ensure paths always use forward slashes as the directory separator.

(filename)

    return None

def _sanitize_filename(filename):
    """Terminate the file name at the first null byte and
    ensure paths always use forward slashes as the directory separator."""

    # Terminate the file name at the first null byte.  Null bytes in file
    # names are used as tricks by viruses in archives.
    null_byte = filename.find(chr(0))
    if null_byte >= 0:
        filename = filename[0:null_byte]
    # This is used to ensure paths in generated ZIP files always use
    # forward slashes as the directory separator, as required by the
    # ZIP format specification.
    if os.sep != "/" and os.sep in filename:
        filename = filename.replace(os.sep, "/")
    if os.altsep and os.altsep != "/" and os.altsep in filename:
        filename = filename.replace(os.altsep, "/")
    return filename


class ZipInfo: