关于javascript：如何用链接替换普通URL，例如？


How to replace plain URLs with links, with example?

本问题已经有最佳答案，请猛点这里访问。

我差点儿把它弄好了。我想知道有没有更好的方法。

根问题

小提琴

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function replaceURLWithHTMLLinks(text) {
    text = text.replace(/a/g,"--ucsps--");
    text = text.replace(/b/g,"--uspds--");
    var arrRegex = [
        /(\([^)]*\b)((?:https?|ftp|file):\/\/[-A-Za-z0-9+&@#\/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#\/%=~_()|])(\))/ig,
        /(\([^)]*\b)((?:https?|ftp|file):\/\/[-A-Za-z0-9+&@#\/%?=~_()|!:,.;]*[-A-Za-z0-9+&@#\/%=~_()|])(.?\b)/ig,
        /()(\b(?:https?|ftp|file):\/\/[-a-z0-9+&@#\/%?=~_()|!:,.;]*[-a-z0-9+&@#\/%=~_()|])(.?\b)/ig];
    for (i = 0; i < arrRegex.length; i++) {
        text = text.replace(arrRegex[i],"$1a$2b$3");
    }
    text = text.replace(/a([^b]*)b/g,"$1");
    text = text.replace(/--ucsps--/g,"a");
    text = text.replace(/--uspds--/g,"b");
    return text;
}
var elm = document.getElementById('trythis');
elm.innerHTML = replaceURLWithHTMLLinks(elm.innerHTML);

有什么想法吗？

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在代码审查中，这个问题得到了很好的回答。

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function replaceURLWithHTMLLinks(text) {
    var re = /(\(.*?)?\b((?:https?|ftp|file):\/\/[-a-z0-9+&@#\/%?=~_()|!:,.;]*[-a-z0-9+&@#\/%=~_()|])/ig;
    return text.replace(re, function(match, lParens, url) {
        var rParens = '';
        lParens = lParens || '';

        // Try to strip the same number of right parens from url
        // as there are left parens.  Here, lParenCounter must be
        // a RegExp object.  You cannot use a literal
        //     while (/\(/g.exec(lParens)) { ... }
        // because an object is needed to store the lastIndex state.
        var lParenCounter = /\(/g;
        while (lParenCounter.exec(lParens)) {
            var m;
            // We want m[1] to be greedy, unless a period precedes the
            // right parenthesis.  These tests cannot be simplified as
            //     /(.*)(\.?\).*)/.exec(url)
            // because if (.*) is greedy then \.? never gets a chance.
            if (m = /(.*)(\.\).*)/.exec(url) ||
                    /(.*)(\).*)/.exec(url)) {
                url = m[1];
                rParens = m[2] + rParens;
            }
        }
        return lParens +"" + url +"" + rParens;
    });
}

注意：我在"var re"中的"@"符号有错误-我刚用替换它@@

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我猜这个问题已经在这里回答了

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function replaceURLWithHTMLLinks(text) {
    var exp = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
    return text.replace(exp,"$1");
}
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