Firebase按键-允许的字符 [英] Firebase push key - allowed characters

问题描述

我想知道按键中允许使用哪种字符.它还会生成符号下划线(_)吗?我总是会收到带有-字母的按键.

I am wondering what kind of characters are allowed in the push key. Does it generate also a symbol underscore(_)? I always get a push key with letters with -.

推荐答案

推键使用修改后的Base64字母:

Push keys use a modified Base64 alphabet:

-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz

它们由时间戳和随机值组成.在此处中进行描述.

They are comprised of a timestamp and a random value. The algorithm is described here.

一般来说，使用Firebase密钥时，会出现一小部分非法字符，这些字符在此答案中列出:

With Firebase keys in general, there is a small set of illegal characters and they are listed in this answer:

字符集限制

Character Set Limitations

请注意，用于构造Firebase引用的URL可能包含任何 Unicode字符，除了:

Note that URLs used to construct Firebase references may contain any unicode characters except:

• . (句号)
• $(美元符号)
• [(左方括号)
• ](右方括号)
• #(井号或井号)
• /(正斜杠)

• . (period)
• $ (dollar sign)
• [ (left square bracket)
• ] (right square bracket)
• # (hash or pound sign)
• / (forward slash)

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