base64 编码的字符串可以包含空格吗?
base64 编码的字符串可能包含空格吗?具体来说，它是否可以在字符串的 end 处包含空格?
Might a base64 encoded string contain whitespace? Specifically, could it contain whitespace at the end of the string?
附注.我正在考虑整个在 VARCHAR 字段中存储字符串时，MySQL 将修剪尾随空格"；-)
PS. I'm thinking about the whole "MySQL will trim trailing whitespace when storing strings in VARCHAR fields" here ;-)
推荐答案
不，它不能.请参阅 Base64 以了解 base64 使用的允许字符存储库，它们是字符 AZ、az、0-9、+ 和 /(最后一个两个可能因实现而异)以及填充字符 =(但这也取决于实现，因为某些实现根本不使用填充).
No it can't. See Base64 for the allowed character repository used by base64, which are the characters A-Z, a-z, 0-9, + and / (the last two may differ depending on the implementation) as well as the padding character = (but that's also implementation dependent as some implementations don't use padding at all).
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