Preface: RECENTLY I used secure_filename, but the discovery of tragedy was not shown in Chinese, so I slowly debug and finally found the problem.

1. Problems recently discovered using secure_filename

The file name is in Chinese, but unfortunately Chinese and other special characters are omitted.

Two, found the reason behind

Originally secure_filename() returned only ASCII characters, non-ASCII characters were filtered out.

Iii. Solutions

Find the secure_filename(filename) function and modify its source code.

Secure_filename (filename) function source:

def secure_filename(filename: str) - >str:
    r"""Pass it a filename and it will return a secure version of it. This filename can then safely be stored on a regular file system and passed to :func:`os.path.join`. The filename returned is an ASCII only string for maximum portability. On windows systems the function also makes sure that the file is not named after one of the special device files. >>> secure_filename("My cool movie.mov") 'My_cool_movie.mov' >>> secure_filename(".. /.. /.. /etc/passwd") 'etc_passwd' >>> secure_filename('i contain cool \xfcml\xe4uts.txt') 'i_contain_cool_umlauts.txt' The function might return an empty filename. It's your responsibility to ensure that the filename is unique and that you abort or generate a random filename if the function returned an empty one. .. Versionadded :: 0.5 :param filename: The filename to secure """
    filename = unicodedata.normalize("NFKD", filename)
    filename = filename.encode("ascii"."ignore").decode("ascii")

    for sep in os.path.sep, os.path.altsep:
        if sep:
            filename = filename.replace(sep, "")
    filename = str(_filename_ascii_strip_re.sub(""."_".join(filename.split()))).strip(
        "_"
    )

    # on nt a couple of special files are present in each folder. We
    # have to ensure that the target file is not such a filename. In
    # this case we prepend an underline
    if (
        os.name == "nt"
        and filename
        and filename.split(".") [0].upper() in _windows_device_files
    ):
        filename = f"_{filename}"

    return filename
Copy the code

Secure_filename (filename)

def secure_filename(filename: str) - >str:
    r"""Pass it a filename and it will return a secure version of it. This filename can then safely be stored on a regular file system and passed to :func:`os.path.join`. The filename returned is an ASCII only string for maximum portability. On windows systems the function also makes sure that the file is not named after one of the special device files. >>> secure_filename("My cool movie.mov") 'My_cool_movie.mov' >>> secure_filename(".. /.. /.. /etc/passwd") 'etc_passwd' >>> secure_filename('i contain cool \xfcml\xe4uts.txt') 'i_contain_cool_umlauts.txt' The function might return an empty filename. It's your responsibility to ensure that the filename is unique and that you abort or generate a random filename if the function returned an empty one. .. Versionadded :: 0.5 :param filename: The filename to secure """
    filename = unicodedata.normalize("NFKD", filename)
    filename = filename.encode("utf8"."ignore").decode("utf8")   # Encoding format changes

    for sep in os.path.sep, os.path.altsep:
        if sep:
            filename = filename.replace(sep, "")
    _filename_ascii_add_strip_re = re.compile(r'[^A-Za-z0-9_\u4E00-\u9FBF\u3040-\u30FF\u31F0-\u31FF.-]')
    filename = str(_filename_ascii_add_strip_re.sub(' '.'_'.join(filename.split()))).strip('_')             # Add new rules

    # on nt a couple of special files are present in each folder. We
    # have to ensure that the target file is not such a filename. In
    # this case we prepend an underline
    if (
        os.name == "nt"
        and filename
        and filename.split(".") [0].upper() in _windows_device_files
    ):
        filename = f"_{filename}"

    return filename
Copy the code

Iv. Effect display

We are clearly seeing the effect and currently support Chinese