unzip utf8 entry name

from https://zhuanlan.zhihu.com/p/625300363

def _unpack_zipfile(filename, extract_dir):
    """Unpack zip `filename` to `extract_dir`
    """
    import zipfile  # late import for breaking circular dependency
​
    if not zipfile.is_zipfile(filename):
        raise shutil.ReadError("%s is not a zip file" % filename)
​
    zip = zipfile.ZipFile(filename)
    try:
        for info in zip.infolist():
            # name = info.filename
​
            # 支持windows下的打得zip包 不会乱码 ==========================
            if info.flag_bits & 0x800:  # #utf-8 #编码
                name = info.filename
            else:
                try:
                    # zipfile 默认使用 #cp437 编码 & #utf-8 编码
                    name = info.filename.encode('cp437').decode('gbk')  # gbk编码兼容ASCII
                except UnicodeDecodeError as e:
                    name = info.filename
            # ========================================================
​
            # don't extract absolute paths or ones with .. in them
            if name.startswith('/') or '..' in name:
                continue
​
            target = os.path.join(extract_dir, *name.split('/'))
            if not target:
                continue
​
            ensure_dir(target)
            if not name.endswith('/'):
                # file
                data = zip.read(info.filename)
                f = open(target, 'wb')
                try:
                    f.write(data)
                finally:
                    f.close()
                    del data
    finally:
        zip.close()
​
​
shutil.unregister_unpack_format('zip')
shutil.register_unpack_format('zip', ['.zip'], _unpack_zipfile, [], "ZIP file")