RegEx禁止字符，除非已转义 [英] RegEx disallow a character unless escaped

问题描述

下面是我的正则表达式，用于解析逗号分隔的键值对:

below is my regex to parse comma separated key-value pairs:

function extractParams(str) {
    var result = {};
    str.replace(/\s*([^=,]+)\s*=\s*([^,]*)\s*/g, function(_, a, b) { result[a.trim()] = b.trim(); });
    return result;
}

例如结果:

extractParams("arg1 = value1 ,arg2    = value2 ,arg3=uuu")

是 {"arg1":"value1","arg2":"value2","arg3":"uuu"}.

我想扩展此功能以允许值包括转义逗号，等号和转义字符本身.这样的结果:

I want to extend this function to allow the values include escaped commas, equals signs and the escape character itself. Such that the result of:

extractParams("arg1 = val\,ue1 ,arg2 = valu\=e2, arg3= val\\ue3")

将是

{"arg1":"val,ue1","arg2":"valu=e2","arg3":"val\ue3"}.

我该怎么做?谢谢，莫西.

How can I do that? Thanks, Moshe.

推荐答案

您可以使用:

function extractParams(str) {
    var result = {};
    str.replace(/\s*((?:\\[,\\=]|[^,\\=]*)+)\s*=\s*((?:\\[,\\=]|[^,\\=]*)+)\s*/g, function(_, a, b) { result[a.trim()] = b.trim(); });
    return result;
}

console.log(extractParams("arg1 = val\\,ue1 ,arg2 = valu\\=e2, arg3= val\\\\ue3"));

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