用Javascript正则实现url链接的解析类
用 Javascript 解析链接(URL)是一个常见的需求,本文介绍了一个非常健全的用 Javascript 写的链接(URL)解析类,他可以准确获取一个完整的 URL 中每个部分的内容,包括协议、URL中包含的用户名和密码、主机名、端口、路径名、参数、锚点(Fragment Anchor)等信息。
if (typeof Poly9 == 'undefined')
{
var Poly9 = {};
}
Poly9.URLParser = function(url) {
this._fields = {
'Username' : 4,
'Password' : 5,
'Port' : 7,
'Protocol' : 2,
'Host' : 6,
'Pathname' : 8,
'URL' : 0,
'Querystring' : 9,
'Fragment' : 10
};
this._values = {};
this._regex = null;
this.version = 0.1;
this._regex = /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?(\w*)/;
for(var f in this._fields)
{
this['get' + f] = this._makeGetter(f);
}
if (typeof url != 'undefined')
{
this._parse(url);
}
}
Poly9.URLParser.prototype.setURL = function(url) {
this._parse(url);
}
Poly9.URLParser.prototype._initValues = function() {
for(var f in this._fields)
{
this._values[f] = '';
}
}
Poly9.URLParser.prototype._parse = function(url) {
this._initValues();
var r = this._regex.exec(url);
if (!r) throw "DPURLParser::_parse -> Invalid URL";
for(var f in this._fields) if (typeof r[this._fields[f]] != 'undefined')
{
this._values[f] = r[this._fields[f]];
}
}
Poly9.URLParser.prototype._makeGetter = function(field) {
return function() {
return this._values[field];
}
}
var url = 'http://user:password@www.jb51.net:1234/test/test.asp?id=1#test';
var p = new Poly9.URLParser(url);
document.write("URL: " + url + "
");
document.write("解析结果如下:
");
document.write("协议: " + p.getProtocol() + "
");
document.write("用户: " + p.getUsername() + "
");
document.write("密码: " + p.getPassword() + "
");
document.write("主机: " + p.getHost() + "
");
document.write("端口: " + p.getPort() + "
");
document.write("路径: " + p.getPathname() + "
");
document.write("查询字符串: " + p.getQuerystring() + "
");
document.write("锚点: " + p.getFragment() + "
");
[Ctrl+A 全选 注:如需引入外部Js需刷新才能执行]