var fs = require('fs')
fs.readFile('logo.png', function(err, origin_buffer) {
console.log('isBuffer: ' + Buffer.isBuffer(origin_buffer))
fs.writeFile('logo_buffer.png', origin_buffer, function(err) {
if (err) console.log(err)
})
var base64Image = origin_buffer.toString('base64');
console.log(base64Image)
var decodedImage = new Buffer(base64Image, 'base64')
console.log(Buffer.compare(origin_buffer, decodedImage))
fs.writeFile('logo_decoded.png', decodedImage, function(err) {
if (err) console.log(err)
})
})