title: how to get file metadata from GCS
body: <p>I would like to get file meta data of file stored in Google Cloud Storage. Actually we require a media link of file so file can be downloaded or url added to page for download.</p>
  
  <pre><code>Blob blob = storage.get("gcp-public-data-nexrad-l2", "1991/06/05/KTLX/NWS_NEXRAD_NXL2LG_KTLX_19910605160000_19910605235959.tar");
  ReadChannel readChannel = blob.reader();
  System.out.println(blob);
  </code></pre>
  
  <p>I am using public bucket, for example, but blob contains <code>metadata=null</code>. Is there any way to get file metadata?</p>
  
  <p>Thanks</p>