a js URI tool

UriBuilder.js

function UriBuilder(uri) {
	this.uri = uri;
	this.parse();
	return this;
}

UriBuilder.prototype.parse = function() {
	// var match = this.uri.match(/(\w+:\/\/?.+?\..+\..+)?(\?.+)/);
	var match = this.uri.split('?');
	var params, o = {},t;

	this.host = match[0];
	params = match[1].split('&') || '';

	params.forEach(function(p) {
		t = p.split('=');
		o[ t[0] ] = t[1];
	});
	this.params = o;
};
UriBuilder.prototype.build = function() {
	var p = '';
	var _params = this.params;
	var key;
	for (key in _params) {
		if (_params.hasOwnProperty(key)) {
			p += key + '=' + encodeURIComponent(_params[key]) + '&';
		}
	}
	p = ('?'+p).slice(0,-1);
	return this.host + p;
};

var b = new UriBuilder('http://www.codewars.com?page=1');
b.params.lang = 'zh-cn';
delete b.params.page;

console.info( b.build() );