本文整理汇总了Python中future.backports.email.errors.InvalidBase64CharactersDefect方法的典型用法代码示例。如果您正苦于以下问题：Python errors.InvalidBase64CharactersDefect方法的具体用法？Python errors.InvalidBase64CharactersDefect怎么用？Python errors.InvalidBase64CharactersDefect使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类future.backports.email.errors的用法示例。
在下文中一共展示了errors.InvalidBase64CharactersDefect方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: decode_b
# 需要导入模块: from future.backports.email import errors [as 别名]
# 或者: from future.backports.email.errors import InvalidBase64CharactersDefect [as 别名]
def decode_b(encoded):
defects = []
pad_err = len(encoded) % 4
if pad_err:
defects.append(errors.InvalidBase64PaddingDefect())
padded_encoded = encoded + b'==='[:4-pad_err]
else:
padded_encoded = encoded
try:
# The validate kwarg to b64decode is not supported in Py2.x
if not re.match(b'^[A-Za-z0-9+/]*={0,2}$', padded_encoded):
raise binascii.Error('Non-base64 digit found')
return base64.b64decode(padded_encoded), defects
except binascii.Error:
# Since we had correct padding, this must an invalid char error.
defects = [errors.InvalidBase64CharactersDefect()]
# The non-alphabet characters are ignored as far as padding
# goes, but we don't know how many there are. So we'll just
# try various padding lengths until something works.
for i in 0, 1, 2, 3:
try:
return base64.b64decode(encoded+b'='*i), defects
except (binascii.Error, TypeError): # Py2 raises a TypeError
if i==0:
defects.append(errors.InvalidBase64PaddingDefect())
else:
# This should never happen.
raise AssertionError("unexpected binascii.Error")