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index.js
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index.js
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'use strict';
var request = require('request');
var fs = require('fs');
var base64encoder = function (url, options, callback) {
options = options || {};
if (typeof callback !== 'function') {
throw new Error('Callback needs to be a function!');
}
if (url === undefined || url === null) {
throw new Error('URL cannot be empty!');
}
var encoder = function (body, options) {
var image;
if (options && options.string === true) {
image = body.toString('base64');
return callback(null, image);
} else {
image = new Buffer(body, 'base64');
return callback(null, image);
}
};
if (options && options.localFile === true) {
fs.readFile(url, function (err, data) {
if (err) { return callback(err); }
return encoder(data, options);
});
} else {
request({url: url, encoding: null}, function (err, res, body) {
if (err) { return callback(err); }
if (body && res.statusCode === 200) {
return encoder(body, options);
} else {
if (!body) { return callback('Image loading error - empty body'); }
else { return callback('Image loading error - ' + res.statusCode); }
}
});
}
};
var base64decoder = function (imageBuffer, options, callback) {
options = options || {};
if (options && options.filename) {
fs.writeFile(options.filename + '.jpg', imageBuffer, 'base64', function (err) {
if (err) { return callback(err); }
return callback(null, 'Image saved successfully to disk!');
});
}
};
module.exports = {
base64encoder: base64encoder,
base64decoder: base64decoder
};