title: ContentDisposition meta data property is not added to the S3 files using AWS-SDK
body: <p>In my application, I am using S3 to store files. But when retrieving those files, they are opening in new tab. But, I want to download those files. Following some references and AWS documentation, I came to know that we can achieve that using <code>ContentDisposition</code> metadata parameter. I did as following:</p>
  
  <pre><code>s3.copyObject({
     CopySource: object.bucket + '/' + object.key,
     Bucket: BUCKET,
     Key: object.destKey,
     ContentDisposition: 'attachment; filename=some_file_name.jpg'
  })
  </code></pre>
  
  <p>When I do as above, the <code>ContentDisposition</code> metadata parameter is not being added (I checked in AWS S3 console). I am not sure where I am doing wrong. Please help me solve this.</p>
  
  <p>Thanks...</p>