gistfile1.txt

module.exports.thumb = function (buffer) {
  var full = new Buffer(buffer, 'base64') // Convert base64 encoded value into binary
    , thumbStream = new stream.Stream()  // Create a new writable stream

  im(full).thumb(800, 450,  100, 'topLeft', function (err, stdout, stderr) {
    var writeStream = fs.createWriteStream('n.jpg')
    stdout.pipe(thumbStream)
  })
  
  return thumbStream
}

//