title: fetching just a byte range for an object (byte-offset + len) rather than full file
body: <p>I am storing large files using Google Cloud Storage.  Sometimes I want to retrieve the full file, but often I want to retrieve just a specific range of bytes from the file.</p>
  
  <p>If I know the byte offset and length that I need to retrieve, is there any way to just retrieve those bytes rather than the full file?  My motivation is to reduce time and bandwidth required to load the data.</p>
  
  <p>This is a feature that is offered by Amazon's S3 and that I have been using for a while.  I am hoping that the same feature is offered by Google so that I can migrate from S3 to Google Cloud Storage.</p>
  
  <p>Regards,</p>
  
  <p>Oscar</p>