title: Batch HTTP Request and dynamic parsing of values
body: <p>I have stored 2 <a href="https://en.wikipedia.org/wiki/Random_access" rel="nofollow noreferrer">Random-Access</a> files into the google cloud - <a href="https://cloud.google.com/storage/docs/json_api/v1/buckets" rel="nofollow noreferrer">in a Bucket</a>; A.file and B.file. I want to make an HTTP request that does the following:</p>
  
  <ol>
  <li>Reads 8 bytes from A.file (X1: type long)</li>
  <li>Reads 4 bytes from A.file (X2: type int)</li>
  <li>Reads X2 bytes from B.file, starting from the X1 position</li>
  </ol>
  
  <p>My concern is to do that using 1 HTTP request. I have read through the <a href="https://cloud.google.com/storage/docs/json_api/v1/parameters#range" rel="nofollow noreferrer">HTTP - range</a> request and using the <a href="https://cloud.google.com/storage/docs/json_api/v1/how-tos/batch" rel="nofollow noreferrer">GAE Batch API</a>. The problem I have is how to dynamically process the values X1 and X2 on the HTTP request.</p>
  
  <p>Any ideas?</p>