title: Problem in uploading multipart Amazon S3 Rest API using PostMan
body: <p>I am trying to use the <a href="https://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html" rel="nofollow noreferrer">Amazon-S3 REST API</a> to upload large file in chunks. </p>
  
  <p>As per the API documentation here I formed my request with postman as follows.</p>
  
  <p>After Initiating <strong>CreateMultipartUpload</strong> Post Request, I'm successfully getting UploadId for chunk put requests. 
  <a href="https://i.stack.imgur.com/KoKJy.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KoKJy.png" alt="enter image description here"></a>
  This is Working Fine.</p>
  
  <p>I understand Multipart order, but when executing the step uploading <strong>partNumber &amp; UploadId</strong> chunks using <strong>POSTMAN</strong> , I'm getting <strong>SHA256Mismatch</strong> error because <strong>POSTMAN</strong> calculating <strong>Content-MD5</strong> for whole file not for chunks.</p>
  
  <ol>
  <li><p>Header
  <a href="https://i.stack.imgur.com/IhojY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IhojY.png" alt="enter image description here"></a></p></li>
  <li><p>Params
  <a href="https://i.stack.imgur.com/iuV4V.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iuV4V.png" alt="enter image description here"></a> </p></li>
  <li><p>Body
  <a href="https://i.stack.imgur.com/xYXpS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/xYXpS.png" alt="enter image description here"></a></p></li>
  </ol>
  
  <p>I have found multiple solutions on various forums but those solutions didn't work. 
  Am I missing something here?</p>