java - 如何在Python中膨胀相同的数据

Question

我有一个 Java 代码，可以正常工作，我需要在 python 中膨胀相同的数据

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.StringUtils;

    public static byte[] Inflate(byte[] compressedContent) throws IOException {
        ByteArrayOutputStream s = new ByteArrayOutputStream();
        InflaterInputStream iis = new InflaterInputStream(new ByteArrayInputStream(compressedContent), new Inflater(true));
        byte[] buffer = new byte[4096];

        int len;
        while ((len = iis.read(buffer)) != -1) {
            s.write(buffer, 0, len);
        }

        iis.close();
        s.flush();
        s.close();
        return s.toByteArray();
    }

使用

StringUtils.newStringUtf8(inflate(Base64.decodeBase64("PZLHrptQAET_xevHE8VgnB1gyqVjig0bRLkUg-k9yr_HiZTsZo5mZjU_T1GSwHEMp7aCzenH6fR1-ivDae_gx7MwGuDwoWX6PwN3uYjFpDRK2XZRfnJQQXA5MIK3N_s7oEDFb9qruFmVNtmCtuuOX6qcTEVP5k-Hv7t-mVnfo-XgDa4LBkIt9lMmtKBz4kful_eDNBUONYQ95CXHBRY3dSlEYcC063oXC8hMkKLXRof6Re3vS8U1w-A0oRQt0spqnGifob-1orDhK-bMYflYVOR8KQC_YxVjjekaHuUxvQOZXBgdI4ubvl6z-p0BF-AjY2qNca48qY6j80Wa6Wxjvl8c31AG5V6vto8FG3vZ2c1jvt28MuvIdyjTx1otQPLMC71iOHjqtpFihNLmQVhPdSzbuM8rJ_eocJ4z12DzvFDZGwyeC109TGV2xjsQ32kv5VGB2NH1XFiGVd8xkE9PRI1oDHFwRck_25y3KlxMWKmlDrw7Br75nrunSsrNJbZwzq5rTRivAuhmBZz12RRacuxyeSz5ZIcMqFk8Il8U7nYEsLHHqLRP92oEGfvQZgfqLuuNWf-qlXqc56TiLpdjlfvAU-LwGG599wrdKST41sHeiKCbCZckNLW-aT8V0_tC7FzPh1pZWO6uykgGHtpOp0J9KzxKlPdXvwy9FTV0geUAmjERfR_mgwDciiqlr0qahOlKSMrW524DzAY4Fv8-18x1_XWCW1d-aFh-CE2dUfTXbw")))

Java 代码运行良好，但我无法将其转换为 Python，如下所示..

def Base64UrlDecode(data):
    """Decode base64, padding being optional.

    :param data: Base64 data as an ASCII byte string
    :returns: The decoded byte string.

    """
    if isinstance(data, unicode):
        data = data.encode('utf-8')
    missing_padding = len(data) % 4
    if missing_padding != 0:
        data += b'=' * (4 - missing_padding)
    return base64.decodestring(data)

url_decode = Base64UrlDecode(token) # The token is the same string as the above one.
# https://docs.python.org/2/library/zlib.html#zlib.compressobj
for i in range(-15, 32): # try all possible ones, but none works.
    try:
        decode = zlib.decompress(url_decode, i)
    except:
        pass

Answer 1

Java 中 Inflater(true) 中的 true 表示对没有 header 或标尾的原始 deflate 数据进行充气。要在 Python 中获得相同的操作，zlib.decompress() 的第二个参数必须为 -15。因此您不需要在那里尝试不同的值。

接下来要检查的是您的 Base64 解码。这两种情况的结果一定是不同的，因此请查看它们的不同之处以找到您的错误。