REST API Single Request - Multiple responses

Question

I am writing a REST API in JAX-RS 2.0, JDK 8 for the below requirement

POST API /server/fileUpload/ (Multipart Form data) where I need to send a Big .AI (Adobe Illustrator) File in this.

The Server, takes the file and return Status 202 (Accepted), Acknowledging that file transfer happened Successfully. (From endpoint to Server)

Now at the Server, I am using Java + Imagemagik to convert .AI File (20-25 MB File) to small JPG Thumbnail, place on a Apache HTTP Server and share the location (like http://happyplace/thumbnail0987.jpg)

Now the Second Response should come from Server with Status 200 OK and Thumbnail URL

is it feasible with one REST API? (Async/similar)

or should I split it to 2 API calls, Please suggest

Answer 1

No. In http, one request gets one response. The client must send a second request to get a second response.