title: dart:html - convert String from HttpRequest to List<int>
body: <p>I want to use dart:archive on the server and client side to compress the bandwidth used in my web app.</p>
  
  <p>At the moment I read my uncompressed data as a JSON objects with file sizes up to 360 MB, compressed they are about 1/8 of the size.</p>
  
  <p>My Problem:</p>
  
  <p>If I do a HttpRequest I get the data as a String, but I need the data as a List of Bytes to encode it via archive.</p>
  
  <p>It is may a silly question but it already cost me a bunch of hours.</p>
  
  <p>Thanks and cheers from Germany
  Felix</p>