[cuser]

https://github.com/snomiao/calibre-utf8-path

backend.py
filenames.py

def replace_invalid_filename_char(filename, replaced_char=''):
    '''Replace the invalid characaters in the filename with specified characater.
    The default replaced characater is '_'.
    e.g.
    C/C++ -> C_C++
    '''
    valid_filename = filename
    invalid_characaters = '\/:*?"<>|'
    for c in invalid_characaters:
        valid_filename = valid_filename.replace('【', '[')
        valid_filename = valid_filename.replace('】', ']')
        valid_filename = valid_filename.replace(c, replaced_char)
    return valid_filename

    def delete_originals(self):
        import win32file
        for path in self.handle_map:
            #win32file.DeleteFileW(path)
            os.remove(path)
        self.close_handles()