Justin's Words

JavaScript 判断 URL

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var URL_REGEXP = /^(http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?$/;
var url = "https://g.taobao.com/brand_detail.htm?navigator=all&_input_charset=utf-8&q=%E7%94%B7%E5%A3%AB%E8%A1%AC%E8%A1%AB%E8%8B%B1%E4%BC%A6%E6%AC%BE&spm=5148.1292865.a31d2.2.NiXIQv";
URL_REGEXP.test(url);    // true
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// 来自 stackoverflow
function ValidURL(str) {
    var pattern = new RegExp('^(https?:\/\/)?'+ // protocol
    '((([a-z\d]([a-z\d-]*[a-z\d])*)\.)+[a-z]{2,}|'+ // domain name
    '((\d{1,3}\.){3}\d{1,3}))'+ // OR ip (v4) address
    '(\:\d+)?(\/[-a-z\d%_.~+]*)*'+ // port and path
    '(\?[;&a-z\d%_.~+=-]*)?'+ // query string
    '(\#[-a-z\d_]*)?$','i'); // fragment locater
    if(!pattern.test(str)) {
    alert("Please enter a valid URL.");
    return false;
    } else {
    return true;
    }
}

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