title: How to list objects by extension from s3 api?
body: <p>Can i somehow search objects in S3 by extension, not only by prefix?</p>
  
  <p>Here is what i have now:</p>
  
  <pre><code>ListObjectsResponse r = s3Client.ListObjects(new Amazon.S3.Model.ListObjectsRequest()
  {
      BucketName = BucketName,
      Marker = marker,
      Prefix = folder, 
      MaxKeys = 1000
  });
  </code></pre>
  
  <p>So, I need to list all *.xls files in my bucket.</p>