JavaScript urlparse - 类似Python的URL解析器和操纵器
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/**
* @projectDescription Poly9's polyvalent URLParser class
*
* Modified to URL reconstruction by Mikko Ohtamaa.
*
* @authorDenis Laprise <denis@poly9.com>, Mikko Ohtamaa <mikko.ohtamaa@twinapex.com>
*
* @version 0.2
* @namespace Poly9
*
* How to query URL:
*
* <pre>
* var p = new Poly9.URLParser('http://user:password@poly9.com/pathname?arguments=1#fragment');
* p.getHost() == 'poly9.com';
* p.getProtocol() == 'http';
* p.getPathname() == '/pathname';
* p.getQuerystring() == 'arguments=1';
* p.getFragment() == 'fragment';
* p.getUsername() == 'user';
* p.getPassword() == 'password';
* </pre>
*
* How to manipulate URL:
*
* <pre>
* var p = new Poly9.URLParser("http://localhost:8080/path);
*
* p.setQuerystring("foo=bar");
* p.setFragment("anchor");
* p.setPort(7070);
*
* var url = p.getURL() // http://localhost:7070/path?foo=bar#anchor
* </pre>
*
* See the unit test file for more examples.
* URLParser is freely distributable under the terms of an MIT-style license.
*
* The orignal code: https://code.poly9.com/trac/browser/urlparser/urlparser.js
*
* http://poly9.com
*
* http://www.twinapex.com
*/
if (typeof Poly9 == 'undefined')
var Poly9 = {};
/**
* Creates an URLParser instance
*
* @classDescription Creates an URLParser instance
* @return {Object} return an URLParser object
* @param {String} url The url to parse
* @constructor
* @exception {String} Throws an exception if the specified url is invalid
*/
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 = 0.2;
// MO: Fixed fragments are allowed to contain dash
this._regex = /^((\w+):\/\/)?((\w+):?(\w+)?@)?([^\/\?:]+):?(\d+)?(\/?[^\?#]+)?\??([^#]+)?#?([^#]*)/;
for (var f in this._fields) {
this['get' + f] = this._makeGetter(f);
this['set' + f] = this._makeSetter(f);
}
// Patch in getURL, since otherwise field generators override this
this.getURL = this._getURL;
if (typeof url != 'undefined')
this._parse(url);
}
/**
* @method
* @param {String} url The url to parse
* @exception {String} Throws an exception if the specified url is invalid
*/
Poly9.URLParser.prototype.setURL = function(url) {
this._parse(url);
}
/**
* Rebuild the URL to string form
*
* @method
* @return {String} Reconstructed full URL
*/
Poly9.URLParser.prototype._getURL = function() {
var s;
s = this.getProtocol();
s += "://"
if(this.getUsername() != '') {
s += this.getUsername();
}
if(this.getPassword() != '') {
s += ":";
s += this.getPassword();
}
if(this.getUsername() != '') {
s += "@";
}
s += this.getHost();
if(this.getPort() != '') {
s += ":" + this.getPort();
}
s += this.getPathname();
if(this.getQuerystring() != '') {
s += "?" + this.getQuerystring();
}
if(this.getFragment() != '') {
s += "#" + this.getFragment();
}
return s;
}
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];
}
}
Poly9.URLParser.prototype._makeSetter = function(field) {
return function(value) {
this._values[field] = value;
}
}
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