title: What HTTP status code should I use for processing status update?
body: <p>I am building an application that sends a set of images to a custom server for processing. The processing can take up to several minutes, so I am implementing a progress bar in the app. The progress bar is updated via an http get request that returns a JSON object containing either an error message, the status of the processing, or the results of the processing.</p>
  
  <p>Upon a successful upload (via put request) the server responds with a status of 202 Accepted.</p>
  
  <p>The HTTP request responds with a status of 500 Internal Server Error if an error has occurred, 102 Processing if the processing has not completed, and 200 Ok if the processing is done and the results are available.</p>
  
  <p>When I am testing in postman the content of the message when a 102 Processing status is returned is hidden, leading me to believe I am misunderstanding something about which codes I should be using. Do the HTTP codes I am using in these scenarios make sense or should I be using other codes?</p>
  
  <p>Thank you</p>