utils.py 文件源码

def safe_filename(text, max_length=200):
    """Sanitizes filenames for many operating systems.

    :params text: The unsanitized pending filename.
    """

    # Tidy up ugly formatted filenames.
    text = text.replace('_', ' ')
    text = text.replace(':', ' -')

    # NTFS forbids filenames containing characters in range 0-31 (0x00-0x1F)
    ntfs = [chr(i) for i in range(0, 31)]

    # Removing these SHOULD make most filename safe for a wide range of
    # operating systems.
    paranoid = ['\"', '\#', '\$', '\%', '\'', '\*', '\,', '\.', '\/', '\:',
                '\;', '\<', '\>', '\?', '\\', '\^', '\|', '\~', '\\\\']

    blacklist = re.compile('|'.join(ntfs + paranoid), re.UNICODE)
    filename = blacklist.sub('', text)
    return truncate(filename)