Async JS/Node - Node CPS More Error Handling example

example.js

var fs = require('fs')
  , path = 'my_file.txt'
 
function getFile(path, callback) {
  fs.readFile(path, function(err, data) {
    if(err){
      return callback(err)
    }

    var wrapperMessage = {coolStuff: true, data: data}
    callback(null, wrapperMessage)
  })
}

getFile(path, function(err, message) {
  if(err) {
    console.error(err)
  } else {
    console.log(message)
  }
})