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Update jquery.base64.js
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‎jquery.base64.js‎

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/*jslint adsafe: false, bitwise: true, browser: true, cap: false, css: false,
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debug: false, devel: true, eqeqeq: true, es5: false, evil: false,
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forin: false, fragment: false, immed: true, laxbreak: false, newcap: true,
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nomen: false, on: false, onevar: true, passfail: false, plusplus: true,
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regexp: false, rhino: true, safe: false, strict: false, sub: false,
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undef: true, white: false, widget: false, windows: false */
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/*global jQuery: false, window: false */
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//"use strict";
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/*
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* Original code (c) 2010 Nick Galbreath
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* http://code.google.com/p/stringencoders/source/browse/#svn/trunk/javascript
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*
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* jQuery port (c) 2010 Carlo Zottmann
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* http://github.com/carlo/jquery-base64
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/* base64 encode/decode compatible with window.btoa/atob
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*
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* window.atob/btoa is a Firefox extension to convert binary data (the "b")
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* to base64 (ascii, the "a").
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*
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* It is also found in Safari and Chrome. It is not available in IE.
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*
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* if (!window.btoa) window.btoa = $.base64.encode
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* if (!window.atob) window.atob = $.base64.decode
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*
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* The original spec's for atob/btoa are a bit lacking
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* https://developer.mozilla.org/en/DOM/window.atob
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* https://developer.mozilla.org/en/DOM/window.btoa
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*
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* window.btoa and $.base64.encode takes a string where charCodeAt is [0,255]
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* If any character is not [0,255], then an exception is thrown.
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*
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* window.atob and $.base64.decode take a base64-encoded string
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* If the input length is not a multiple of 4, or contains invalid characters
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* then an exception is thrown.
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*/
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jQuery.base64 = ( function( $ ) {
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var _PADCHAR = "=",
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_ALPHA = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",
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_VERSION = "1.0";
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function _getbyte64( s, i ) {
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// This is oddly fast, except on Chrome/V8.
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// Minimal or no improvement in performance by using a
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// object with properties mapping chars to value (eg. 'A': 0)
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var idx = _ALPHA.indexOf( s.charAt( i ) );
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if ( idx === -1 ) {
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throw "Cannot decode base64";
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}
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return idx;
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}
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function _decode( s ) {
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var pads = 0,
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i,
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b10,
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imax = s.length,
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x = [];
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s = String( s );
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if ( imax === 0 ) {
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return s;
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}
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if ( imax % 4 !== 0 ) {
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throw "Cannot decode base64";
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}
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if ( s.charAt( imax - 1 ) === _PADCHAR ) {
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pads = 1;
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if ( s.charAt( imax - 2 ) === _PADCHAR ) {
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pads = 2;
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}
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// either way, we want to ignore this last block
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imax -= 4;
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}
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for ( i = 0; i < imax; i += 4 ) {
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b10 = ( _getbyte64( s, i ) << 18 ) | ( _getbyte64( s, i + 1 ) << 12 ) | ( _getbyte64( s, i + 2 ) << 6 ) | _getbyte64( s, i + 3 );
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x.push( String.fromCharCode( b10 >> 16, ( b10 >> 8 ) & 0xff, b10 & 0xff ) );
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}
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switch ( pads ) {
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case 1:
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b10 = ( _getbyte64( s, i ) << 18 ) | ( _getbyte64( s, i + 1 ) << 12 ) | ( _getbyte64( s, i + 2 ) << 6 );
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x.push( String.fromCharCode( b10 >> 16, ( b10 >> 8 ) & 0xff ) );
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break;
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case 2:
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b10 = ( _getbyte64( s, i ) << 18) | ( _getbyte64( s, i + 1 ) << 12 );
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x.push( String.fromCharCode( b10 >> 16 ) );
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break;
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}
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return x.join( "" );
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}
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function _getbyte( s, i ) {
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var x = s.charCodeAt( i );
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if ( x > 255 ) {
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throw "INVALID_CHARACTER_ERR: DOM Exception 5";
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}
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return x;
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}
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function _encode( s ) {
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if ( arguments.length !== 1 ) {
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throw "SyntaxError: exactly one argument required";
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}
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s = String( s );
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var i,
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b10,
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x = [],
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imax = s.length - s.length % 3;
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if ( s.length === 0 ) {
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return s;
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}
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for ( i = 0; i < imax; i += 3 ) {
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b10 = ( _getbyte( s, i ) << 16 ) | ( _getbyte( s, i + 1 ) << 8 ) | _getbyte( s, i + 2 );
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x.push( _ALPHA.charAt( b10 >> 18 ) );
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x.push( _ALPHA.charAt( ( b10 >> 12 ) & 0x3F ) );
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x.push( _ALPHA.charAt( ( b10 >> 6 ) & 0x3f ) );
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x.push( _ALPHA.charAt( b10 & 0x3f ) );
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}
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switch ( s.length - imax ) {
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case 1:
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b10 = _getbyte( s, i ) << 16;
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x.push( _ALPHA.charAt( b10 >> 18 ) + _ALPHA.charAt( ( b10 >> 12 ) & 0x3F ) + _PADCHAR + _PADCHAR );
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break;
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case 2:
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b10 = ( _getbyte( s, i ) << 16 ) | ( _getbyte( s, i + 1 ) << 8 );
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x.push( _ALPHA.charAt( b10 >> 18 ) + _ALPHA.charAt( ( b10 >> 12 ) & 0x3F ) + _ALPHA.charAt( ( b10 >> 6 ) & 0x3f ) + _PADCHAR );
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break;
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/**
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*
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* Base64 encode / decode
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* http://www.webtoolkit.info/
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*
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**/
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var Base64 = {
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// private property
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_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
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// public method for encoding
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encode : function (input) {
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var output = "";
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var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
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var i = 0;
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input = Base64._utf8_encode(input);
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while (i < input.length) {
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chr1 = input.charCodeAt(i++);
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chr2 = input.charCodeAt(i++);
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chr3 = input.charCodeAt(i++);
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enc1 = chr1 >> 2;
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enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
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enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
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enc4 = chr3 & 63;
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if (isNaN(chr2)) {
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enc3 = enc4 = 64;
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} else if (isNaN(chr3)) {
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enc4 = 64;
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}
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output = output +
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this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
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this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
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}
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return output;
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},
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// public method for decoding
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decode : function (input) {
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var output = "";
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var chr1, chr2, chr3;
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var enc1, enc2, enc3, enc4;
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var i = 0;
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input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < input.length) {
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enc1 = this._keyStr.indexOf(input.charAt(i++));
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enc2 = this._keyStr.indexOf(input.charAt(i++));
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enc3 = this._keyStr.indexOf(input.charAt(i++));
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enc4 = this._keyStr.indexOf(input.charAt(i++));
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chr1 = (enc1 << 2) | (enc2 >> 4);
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chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
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chr3 = ((enc3 & 3) << 6) | enc4;
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output = output + String.fromCharCode(chr1);
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if (enc3 != 64) {
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64) {
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output = output + String.fromCharCode(chr3);
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}
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}
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output = Base64._utf8_decode(output);
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return output;
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},
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// private method for UTF-8 encoding
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_utf8_encode : function (string) {
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string = string.replace(/\r\n/g,"\n");
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var utftext = "";
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for (var n = 0; n < string.length; n++) {
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var c = string.charCodeAt(n);
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if (c < 128) {
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utftext += String.fromCharCode(c);
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}
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else if((c > 127) && (c < 2048)) {
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utftext += String.fromCharCode((c >> 6) | 192);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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else {
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utftext += String.fromCharCode((c >> 12) | 224);
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utftext += String.fromCharCode(((c >> 6) & 63) | 128);
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utftext += String.fromCharCode((c & 63) | 128);
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}
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}
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return utftext;
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},
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// private method for UTF-8 decoding
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_utf8_decode : function (utftext) {
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var string = "";
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var i = 0;
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var c = c1 = c2 = 0;
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while ( i < utftext.length ) {
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c = utftext.charCodeAt(i);
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if (c < 128) {
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string += String.fromCharCode(c);
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i++;
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}
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else if((c > 191) && (c < 224)) {
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c2 = utftext.charCodeAt(i+1);
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string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
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i += 2;
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}
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else {
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c2 = utftext.charCodeAt(i+1);
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c3 = utftext.charCodeAt(i+2);
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string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
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i += 3;
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}
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}
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return string;
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}
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return x.join( "" );
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}
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return {
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decode: _decode,
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encode: _encode,
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VERSION: _VERSION
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};
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}( jQuery ) );
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}

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