title: node.js toString encoding
body: <p>I have file encoded with koi8-u</p>
  
  <p>I need to just copy this file, but, through toString()</p>
  
  <pre><code>fs = require('fs')
  fs.readFile('fileOne',function(e,data){
      data = data.toString() // now encoding is damaged
  
      ???  // my code must be here
  
      fs.writeFile('fileTwo',data)
  })
  </code></pre>
  
  <p>I tried iconv it back using different charsets but with no success. Thanks!</p>