Send updates about the state of a running HTTP request to the client

I would like to send updates of a running HTTP request to the client to tell it at what stage the request-triggered process currently is.

The process behind the request does currently the following things (in this order):


  • Client sends an HTTP Request (upload of a file) to the server


  • Takes the uploaded file
  • Encrypt it
  • Upload it to an archive storage
  • Return response to the client (Meanwhile, the client does not know what currently happens)


  • Get response and show it to the user

I want to tell the client at what stage the process is, like “Uploading done. Encrypting…” and so on.

Is there a way to realize that, or am I missing something? Is it even possible to do?

Frameworks I'm using:

  • Client: Next.js
  • Server: for API development


1 answer

  • answered 2022-05-04 10:37 finn

    You can send non-final 1xx header responses for your http request as described here.

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