Javascript 正则表达式匹配 JSON 字符串
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Regex to match a JSON String
提问by Sietse
I am building a JSON validator from scratch, but I am quite stuck with the string part. My hope was building a regex which would match the following sequence found on JSON.org:
我正在从头开始构建一个 JSON 验证器，但我对字符串部分很感兴趣。我希望构建一个与 JSON.org 上的以下序列匹配的正则表达式：
My regex so far is:
到目前为止，我的正则表达式是：
/^\"((?=\)\(\"|\/|\|b|f|n|r|t|u[0-9a-f]{4}))*\"$/
It does match the criteria with a backslash following by a character and an empty string. But I'm not sure how to use the UNICODE part.
它确实通过反斜杠后跟一个字符和一个空字符串来匹配条件。但我不确定如何使用 UNICODE 部分。
Is there a regex to match any UNICODE character expert " or \ or control character? And will it match a newline or horizontal tab?
是否有正则表达式匹配任何 UNICODE 字符专家 " 或 \ 或控制字符？它会匹配换行符或水平制表符吗？
The last question is because the regex match the string "\t", but not " " (four spaces, but the idea is to be a tab). Otherwise I will need to expand the regex with it, which is not a problem, but my guess is the horizontal tab is a UNICODE character.
最后一个问题是因为正则表达式匹配字符串“\t”，但不匹配“”（四个空格，但想法是一个制表符）。否则我需要用它扩展正则表达式，这不是问题，但我猜测水平制表符是一个 UNICODE 字符。
Thanks to Jaeger Kor, I now have the following regex:
感谢 Jaeger Kor，我现在有了以下正则表达式：
/^\"((?=\)\(\"|\/|\|b|f|n|r|t|u[0-9a-f]{4})|[^\"]*)*\"$/
It appears to be correct, but is there any way to check for control characters or is this unneeded as they appear on the non-printable characters on regular-expressions.info? The input to validate is always text from a textarea.
它似乎是正确的，但是有没有办法检查控制字符，或者这是不需要的，因为它们出现在regular-expressions.info 上的不可打印字符上？要验证的输入始终是来自 textarea 的文本。
Update: the regex is as following in case anyone needs it:
更新：正则表达式如下，以防有人需要它：
/^("(((?=\)\(["\\/bfnrt]|u[0-9a-fA-F]{4}))|[^"\# Matches any character that isn't a \ or "
/[^\"]/
-\x1F\x7F]+)*")$/
采纳答案by Jaeger Kor
For your exact question create a character class
对于您的确切问题，请创建一个字符类
/[^\"]*/
And then you can just add * on the end to get 0 or unlimited number of them or alternatively 1 or an unlimited number with +
然后你可以在末尾添加 * 以获得 0 或无限数量的它们，或者 1 或无限数量的 +
/[^\"]+/
or
或者
/(?(DEFINE)
# Note that everything is atomic, JSON does not need backtracking if it's valid
# and this prevents catastrophic backtracking
(?<json>(?>\s*(?&object)\s*|\s*(?&array)\s*))
(?<object>(?>\{\s*(?>(?&pair)(?>\s*,\s*(?&pair))*)?\s*\}))
(?<pair>(?>(?&STRING)\s*:\s*(?&value)))
(?<array>(?>\[\s*(?>(?&value)(?>\s*,\s*(?&value))*)?\s*\]))
(?<value>(?>true|false|null|(?&STRING)|(?&NUMBER)|(?&object)|(?&array)))
(?<STRING>(?>"(?>\(?>["\\/bfnrt]|u[a-fA-F0-9]{4})|[^"\##代码##-\x1F\x7F]+)*"))
(?<NUMBER>(?>-?(?>0|[1-9][0-9]*)(?>\.[0-9]+)?(?>[eE][+-]?[0-9]+)?))
)
\A(?&json)\z/x
Also there is this below, found at https://regex101.com/under the library tab when searching for json
下面还有这个，在搜索 json 时在库选项卡下的https://regex101.com/找到
##代码##This should match any valid json, you can also test it at the website above
这应该匹配任何有效的 json，你也可以在上面的网站上测试它
EDIT:
编辑：
