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431 lines
12 KiB
431 lines
12 KiB
// https://github.com/inexorabletash/polyfill/blob/v0.1.25/url.js
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// URL Polyfill
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// Draft specification: https://url.spec.whatwg.org
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// Notes:
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// - Primarily useful for parsing URLs and modifying query parameters
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// - Should work in IE8+ and everything more modern
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(function (global) {
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'use strict';
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// Browsers may have:
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// * No global URL object
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// * URL with static methods only - may have a dummy constructor
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// * URL with members except searchParams
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// * Full URL API support
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var origURL = global.URL;
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var nativeURL;
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try{
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if( origURL ){
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nativeURL = new global.URL('http://example.com');
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if( 'searchParams' in nativeURL )
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return;
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if( !('href' in nativeURL) )
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nativeURL = undefined;
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}
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}
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catch( _ ){}
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// NOTE: Doesn't do the encoding/decoding dance
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function urlencoded_serialize(pairs) {
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var output = '', first = true;
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pairs.forEach(function (pair) {
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var name = encodeURIComponent(pair.name);
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var value = encodeURIComponent(pair.value);
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if( !first ) output += '&';
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output += name + '=' + value;
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first = false;
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});
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return output.replace(/%20/g, '+');
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}
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// NOTE: Doesn't do the encoding/decoding dance
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function urlencoded_parse(input, isindex) {
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var sequences = input.split('&');
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if( isindex && sequences[0].indexOf('=') === -1 )
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sequences[0] = '=' + sequences[0];
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var pairs = [];
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sequences.forEach(function (bytes) {
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if( bytes.length === 0 ) return;
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var index = bytes.indexOf('=');
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if( index !== -1 ){
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var name = bytes.substring(0, index);
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var value = bytes.substring(index + 1);
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}
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else{
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name = bytes;
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value = '';
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}
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name = name.replace(/\+/g, ' ');
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value = value.replace(/\+/g, ' ');
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pairs.push({ name: name, value: value });
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});
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var output = [];
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pairs.forEach(function (pair) {
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output.push({
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name: decodeURIComponent(pair.name),
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value: decodeURIComponent(pair.value)
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});
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});
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return output;
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}
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function URLUtils(url) {
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if( nativeURL )
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return new origURL(url);
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var anchor = document.createElement('a');
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anchor.href = url;
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return anchor;
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}
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function URLSearchParams(init) {
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var $this = this;
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this._list = [];
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if( init === undefined || init === null )
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init = '';
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if( Object(init) !== init || !(init instanceof URLSearchParams) )
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init = String(init);
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if( typeof init === 'string' && init.substring(0, 1) === '?' )
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init = init.substring(1);
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if( typeof init === 'string' )
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this._list = urlencoded_parse(init);
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else
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this._list = init._list.slice();
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this._url_object = null;
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this._setList = function (list) { if( !updating ) $this._list = list; };
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var updating = false;
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this._update_steps = function() {
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if( updating ) return;
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updating = true;
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if( !$this._url_object ) return;
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// Partial workaround for IE issue with 'about:'
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if( $this._url_object.protocol === 'about:' &&
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$this._url_object.pathname.indexOf('?') !== -1 ){
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$this._url_object.pathname = $this._url_object.pathname.split('?')[0];
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}
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$this._url_object.search = urlencoded_serialize($this._list);
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updating = false;
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};
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}
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Object.defineProperties(URLSearchParams.prototype, {
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append: {
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value: function (name, value) {
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this._list.push({ name: name, value: value });
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this._update_steps();
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}, writable: true, enumerable: true, configurable: true
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},
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'delete': {
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value: function (name) {
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for( var i = 0; i < this._list.length; ){
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if( this._list[i].name === name )
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this._list.splice(i, 1);
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else
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++i;
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}
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this._update_steps();
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}, writable: true, enumerable: true, configurable: true
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},
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get: {
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value: function (name) {
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for( var i = 0; i < this._list.length; ++i ){
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if( this._list[i].name === name )
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return this._list[i].value;
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}
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return null;
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}, writable: true, enumerable: true, configurable: true
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},
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getAll: {
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value: function (name) {
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var result = [];
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for( var i = 0; i < this._list.length; ++i ){
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if( this._list[i].name === name )
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result.push(this._list[i].value);
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}
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return result;
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}, writable: true, enumerable: true, configurable: true
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},
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has: {
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value: function (name) {
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for( var i = 0; i < this._list.length; ++i ){
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if( this._list[i].name === name )
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return true;
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}
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return false;
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}, writable: true, enumerable: true, configurable: true
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},
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set: {
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value: function (name, value) {
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var found = false;
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for( var i = 0; i < this._list.length; ){
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if( this._list[i].name === name ){
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if( !found ){
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this._list[i].value = value;
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found = true;
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++i;
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}
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else{
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this._list.splice(i, 1);
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}
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}
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else{
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++i;
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}
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}
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if( !found )
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this._list.push({ name: name, value: value });
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this._update_steps();
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}, writable: true, enumerable: true, configurable: true
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},
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entries: {
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value: function() {
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var $this = this, index = 0;
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return { next: function() {
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if( index >= $this._list.length )
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return {done: true, value: undefined};
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var pair = $this._list[index++];
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return {done: false, value: [pair.name, pair.value]};
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}};
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}, writable: true, enumerable: true, configurable: true
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},
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keys: {
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value: function() {
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var $this = this, index = 0;
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return { next: function() {
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if( index >= $this._list.length )
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return {done: true, value: undefined};
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var pair = $this._list[index++];
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return {done: false, value: pair.name};
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}};
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}, writable: true, enumerable: true, configurable: true
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},
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values: {
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value: function() {
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var $this = this, index = 0;
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return { next: function() {
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if( index >= $this._list.length )
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return {done: true, value: undefined};
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var pair = $this._list[index++];
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return {done: false, value: pair.value};
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}};
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}, writable: true, enumerable: true, configurable: true
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},
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forEach: {
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value: function(callback) {
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var thisArg = (arguments.length > 1) ? arguments[1] : undefined;
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this._list.forEach(function(pair, _index) {
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callback.call(thisArg, pair.name, pair.value);
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});
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}, writable: true, enumerable: true, configurable: true
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},
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toString: {
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value: function () {
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return urlencoded_serialize(this._list);
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}, writable: true, enumerable: false, configurable: true
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}
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});
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if( 'Symbol' in global && 'iterator' in global.Symbol ){
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Object.defineProperty(URLSearchParams.prototype, global.Symbol.iterator, {
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value: URLSearchParams.prototype.entries,
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writable: true, enumerable: true, configurable: true});
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}
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function URL(url, base) {
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if( !(this instanceof global.URL) )
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throw new TypeError('Failed to construct "URL": Please use the "new" operator.');
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if( base ){
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url = (function () {
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if( nativeURL ) return new origURL(url, base).href;
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var doc;
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// Use another document/base tag/anchor for relative URL resolution, if possible
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if( document.implementation && document.implementation.createHTMLDocument ){
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doc = document.implementation.createHTMLDocument('');
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}
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else if( document.implementation && document.implementation.createDocument ){
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doc = document.implementation.createDocument('http://www.w3.org/1999/xhtml', 'html', null);
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doc.documentElement.appendChild(doc.createElement('head'));
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doc.documentElement.appendChild(doc.createElement('body'));
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}
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else if( window.ActiveXObject ){
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doc = new window.ActiveXObject('htmlfile');
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doc.write('<head></head><body></body>');
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doc.close();
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}
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if( !doc ) throw Error('base not supported');
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var baseTag = doc.createElement('base');
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baseTag.href = base;
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doc.getElementsByTagName('head')[0].appendChild(baseTag);
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var anchor = doc.createElement('a');
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anchor.href = url;
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return anchor.href;
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}());
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}
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// An inner object implementing URLUtils (either a native URL
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// object or an HTMLAnchorElement instance) is used to perform the
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// URL algorithms. With full ES5 getter/setter support, return a
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// regular object For IE8's limited getter/setter support, a
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// different HTMLAnchorElement is returned with properties
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// overridden
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var instance = URLUtils(url || '');
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// Detect for ES5 getter/setter support
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// (an Object.defineProperties polyfill that doesn't support getters/setters may throw)
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var ES5_GET_SET = (function() {
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if( !('defineProperties' in Object) ) return false;
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try{
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var obj = {};
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Object.defineProperties(obj, { prop: { 'get': function () { return true; } } });
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return obj.prop;
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}
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catch( _ ){
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return false;
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}
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})();
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var self = ES5_GET_SET ? this : document.createElement('a');
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var query_object = new URLSearchParams(
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instance.search ? instance.search.substring(1) : null);
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query_object._url_object = self;
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Object.defineProperties(self, {
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href: {
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get: function () { return instance.href; },
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set: function (v) { instance.href = v; tidy_instance(); update_steps(); },
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enumerable: true, configurable: true
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},
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origin: {
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get: function () {
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if( 'origin' in instance ) return instance.origin;
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return this.protocol + '//' + this.host;
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},
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enumerable: true, configurable: true
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},
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protocol: {
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get: function () { return instance.protocol; },
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set: function (v) { instance.protocol = v; },
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enumerable: true, configurable: true
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},
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username: {
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get: function () { return instance.username; },
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set: function (v) { instance.username = v; },
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enumerable: true, configurable: true
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},
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password: {
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get: function () { return instance.password; },
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set: function (v) { instance.password = v; },
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enumerable: true, configurable: true
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},
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host: {
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get: function () {
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// IE returns default port in |host|
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var re = {'http:': /:80$/, 'https:': /:443$/, 'ftp:': /:21$/}[instance.protocol];
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return re ? instance.host.replace(re, '') : instance.host;
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},
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set: function (v) { instance.host = v; },
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enumerable: true, configurable: true
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},
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hostname: {
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get: function () { return instance.hostname; },
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set: function (v) { instance.hostname = v; },
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enumerable: true, configurable: true
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},
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port: {
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get: function () { return instance.port; },
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set: function (v) { instance.port = v; },
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enumerable: true, configurable: true
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},
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pathname: {
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get: function () {
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// IE does not include leading '/' in |pathname|
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if( instance.pathname.charAt(0) !== '/' ) return '/' + instance.pathname;
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return instance.pathname;
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},
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set: function (v) { instance.pathname = v; },
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enumerable: true, configurable: true
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},
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search: {
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get: function () { return instance.search; },
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set: function (v) {
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if( instance.search === v ) return;
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instance.search = v; tidy_instance(); update_steps();
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},
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enumerable: true, configurable: true
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},
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searchParams: {
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get: function () { return query_object; },
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enumerable: true, configurable: true
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},
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hash: {
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get: function () { return instance.hash; },
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set: function (v) { instance.hash = v; tidy_instance(); },
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enumerable: true, configurable: true
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},
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toString: {
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value: function() { return instance.toString(); },
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enumerable: false, configurable: true
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},
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valueOf: {
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value: function() { return instance.valueOf(); },
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enumerable: false, configurable: true
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}
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});
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function tidy_instance() {
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var href = instance.href.replace(/#$|\?$|\?(?=#)/g, '');
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if( instance.href !== href )
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instance.href = href;
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}
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function update_steps() {
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query_object._setList(instance.search ? urlencoded_parse(instance.search.substring(1)) : []);
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query_object._update_steps();
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}
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return self;
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}
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if( origURL ){
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for( var i in origURL ){
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if( Object.prototype.hasOwnProperty.call(origURL, i) && typeof origURL[i] === 'function' )
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URL[i] = origURL[i];
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}
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}
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global.URL = URL;
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global.URLSearchParams = URLSearchParams;
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}( typeof self !== 'undefined' ? self : this ));
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