python base64 decode incorrect padding错误解决方法

1337次阅读  |  发布于5年以前

python的base64.decodestring方法做base64解码时报错:

复制代码 代码如下:

Traceback (most recent call last):
File "/export/www/outofmemory.cn/controllers/user.py", line 136, in decryptPassword
encryptPwd = base64.b64decode(encryptPwd)
File "/usr/lib/python2.7/base64.py", line 76, in b64decode
raise TypeError(msg)
TypeError: Incorrect padding

这也算是python的一个坑吧,解决此问题的方法很简单,对base64解码的string补齐等号就可以了,如下代码:

复制代码 代码如下:

    def decode_base64(data):  
        """Decode base64, padding being optional.

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

        """  
        missing_padding = 4 - len(data) % 4  
        if missing_padding:  
            data += b'='* missing_padding  
        return base64.decodestring(data)  

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