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https://github.com/mgerb/mywebsite
synced 2026-01-12 02:42:48 +00:00
updated bunch of file paths and changed the way posts are loaded
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201
node_modules/libbase64/lib/libbase64.js
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201
node_modules/libbase64/lib/libbase64.js
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'use strict';
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var stream = require('stream');
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var util = require('util');
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var Transform = stream.Transform;
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// expose to the world
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module.exports = {
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encode: encode,
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decode: decode,
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wrap: wrap,
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Encoder: Encoder,
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Decoder: Decoder
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};
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/**
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* Encodes a Buffer into a base64 encoded string
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*
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* @param {Buffer} buffer Buffer to convert
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* @returns {String} base64 encoded string
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*/
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function encode(buffer) {
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if (typeof buffer === 'string') {
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buffer = new Buffer(buffer, 'utf-8');
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}
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return buffer.toString('base64');
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}
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/**
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* Decodes a base64 encoded string to a Buffer object
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*
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* @param {String} str base64 encoded string
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* @returns {Buffer} Decoded value
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*/
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function decode(str) {
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str = (str || '');
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return new Buffer(str, 'base64');
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}
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/**
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* Adds soft line breaks to a base64 string
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*
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* @param {String} str base64 encoded string that might need line wrapping
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* @param {Number} [lineLength=76] Maximum allowed length for a line
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* @returns {String} Soft-wrapped base64 encoded string
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*/
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function wrap(str, lineLength) {
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str = (str || '').toString();
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lineLength = lineLength || 76;
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if (str.length <= lineLength) {
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return str;
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}
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return str.replace(new RegExp('.{' + lineLength + '}', 'g'), '$&\r\n').trim();
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}
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/**
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* Creates a transform stream for encoding data to base64 encoding
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*
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* @constructor
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* @param {Object} options Stream options
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* @param {Number} [options.lineLength=76] Maximum lenght for lines, set to false to disable wrapping
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*/
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function Encoder(options) {
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// init Transform
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this.options = options || {};
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if (this.options.lineLength !== false) {
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this.options.lineLength = this.options.lineLength || 76;
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}
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this._curLine = '';
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this._remainingBytes = false;
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this.inputBytes = 0;
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this.outputBytes = 0;
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Transform.call(this, this.options);
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}
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util.inherits(Encoder, Transform);
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Encoder.prototype._transform = function(chunk, encoding, done) {
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var b64, _self = this;
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if (encoding !== 'buffer') {
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chunk = new Buffer(chunk, encoding);
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}
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if (!chunk || !chunk.length) {
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return done();
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}
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this.inputBytes += chunk.length;
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if (this._remainingBytes && this._remainingBytes.length) {
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chunk = Buffer.concat([this._remainingBytes, chunk]);
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this._remainingBytes = false;
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}
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if (chunk.length % 3) {
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this._remainingBytes = chunk.slice(chunk.length - chunk.length % 3);
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chunk = chunk.slice(0, chunk.length - chunk.length % 3);
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} else {
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this._remainingBytes = false;
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}
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b64 = this._curLine + encode(chunk);
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if (this.options.lineLength) {
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b64 = wrap(b64, this.options.lineLength);
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b64 = b64.replace(/(^|\n)([^\n]*)$/, function(match, lineBreak, lastLine) {
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_self._curLine = lastLine;
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return lineBreak;
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});
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}
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if (b64) {
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this.outputBytes += b64.length;
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this.push(b64);
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}
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done();
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};
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Encoder.prototype._flush = function(done) {
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if (this._remainingBytes && this._remainingBytes.length) {
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this._curLine += encode(this._remainingBytes);
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}
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if (this._curLine) {
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this._curLine = wrap(this._curLine, this.options.lineLength);
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this.outputBytes += this._curLine.length;
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this.push(this._curLine, 'ascii');
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this._curLine = '';
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}
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done();
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};
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/**
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* Creates a transform stream for decoding base64 encoded strings
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*
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* @constructor
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* @param {Object} options Stream options
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*/
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function Decoder(options) {
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// init Transform
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this.options = options || {};
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this._curLine = '';
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this.inputBytes = 0;
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this.outputBytes = 0;
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Transform.call(this, this.options);
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}
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util.inherits(Decoder, Transform);
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Decoder.prototype._transform = function(chunk, encoding, done) {
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var b64, buf;
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chunk = chunk.toString('ascii');
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if (!chunk || !chunk.length) {
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return done();
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}
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this.inputBytes += chunk.length;
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b64 = (this._curLine + chunk);
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this._curLine = '';
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b64 = b64.replace(/[^a-zA-Z0-9+\/=]/g, '');
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if (b64.length % 4) {
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this._curLine = b64.substr(-b64.length % 4);
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if (this._curLine.length == b64.length) {
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b64 = '';
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} else {
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b64 = b64.substr(0, this._curLine.length);
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}
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}
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if (b64) {
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buf = decode(b64);
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this.outputBytes += buf.length;
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this.push(buf);
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}
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done();
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};
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Decoder.prototype._flush = function(done) {
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var b64, buf;
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if (this._curLine) {
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buf = decode(this._curLine);
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this.outputBytes += buf.length;
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this.push(buf);
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this._curLine = '';
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}
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done();
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};
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