84 lines
No EOL
2 KiB
JavaScript
84 lines
No EOL
2 KiB
JavaScript
function base64_url_encode(_text)
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{
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if(_text.length == 0)
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return "";
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_text = base64_encode(_text.toString());
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_text = _text.replace(/=/g, "_");
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_text = _text.replace(/\+/g, "-");
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_text = _text.replace(/\//g, ",");
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return _text;
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}
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function base64_url_decode(_text)
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{
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if(!(_text != null && _text.length > 0))
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return "";
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_text = _text.replace(/_/g,"=");
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_text = _text.replace(/-/g,"+");
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_text = _text.replace(/,/g,"/");
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_text = base64_decode(_text);
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return _text;
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}
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function base64_decode(_text)
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{
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var base64_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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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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_text = _text.replace(/[^A-Za-z0-9\+\/\=]/g, "");
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while (i < _text.length)
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{
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enc1 = base64_chars.indexOf(_text.charAt(i++));
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enc2 = base64_chars.indexOf(_text.charAt(i++));
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enc3 = base64_chars.indexOf(_text.charAt(i++));
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enc4 = base64_chars.indexOf(_text.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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{
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output = output + String.fromCharCode(chr2);
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}
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if (enc4 != 64)
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{
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output = output + String.fromCharCode(chr3);
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}
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}
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output = utf8_decode(output);
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return output;
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}
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function base64_encode(_input)
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{
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var base64_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
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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 = utf8_encode(_input);
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while (i < _input.length)
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{
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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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{
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enc3 = enc4 = 64;
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}
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else if(isNaN(chr3))
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{
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enc4 = 64;
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}
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output = output + base64_chars.charAt(enc1) + base64_chars.charAt(enc2) + base64_chars.charAt(enc3) + base64_chars.charAt(enc4);
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}
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return output;
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} |