[FIXED] Getting "Unsupported Media Type" error 415 (octet-stream)

Issue

I developed a controller which generates an excel file with a chart, but when I change the attribute "produces" from the mapping, I always get the error as mentioned in the title.
This is the header from the postman rel="nofollow noreferrer">

And, this is the controller code

 @PostMapping(value = "/exportfile/excel", produces = {MediaType.APPLICATION_OCTET_STREAM_VALUE})
    public ResponseEntity<InputStreamResource> exportExcel(@RequestBody ClientDataObjectRequest clientDataObjectRequest) {

        ByteArrayInputStream file = generateCSVExcelService.generateFileDetailsWithChart(clientDataObjectRequest);

        String dateFile = new SimpleDateFormat("MM-dd-yyyy").format(new java.util.Date());
        String timeFile = new SimpleDateFormat("HH-mm").format(new java.util.Date());
        String fileName = clientDataObjectRequest.getMetricName().replace(" ","_") + "_" + dateFile + "T" + timeFile;

        HttpHeaders headers = new HttpHeaders();
        headers.setContentDispositionFormData("attachment", fileName + ".xlsx");
        headers.setContentType(MediaType.APPLICATION_OCTET_STREAM);
        //headers.set(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fileName + ".xlsx");
        //headers.set(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_OCTET_STREAM_VALUE);

        return new ResponseEntity<>(new InputStreamResource(file), headers, HttpStatus.OK);
    }

As you can see, I'm using the "produces" as "APPLICATION_OCTET_STREAM_VALUE" as well as the headers request and response.
What am I missing here?

EDIT: I'm receiving a request body in a Json format

{
    "metricName":"Turnover Rate",
    "dataFormatCodeValue": "currency",
    "clientDataRequest":[
       {
          "clientName":"client 1",
          "value":"1"
       },
       {
          "clientName":"client 2",
          "value":"2"
       },
       {
          "clientName":"client 3",
          "value":"53.78"
       },
       {
          "clientName":"client 4",
          "value":"3"
       },
       {
          "clientName":"client 5555555",
          "value":"4"
       },
       {
          "clientName":"client 6",
          "value":"33"
       },
       {
          "clientName":"client 7",
          "value":"0"
       },
       {
          "clientName":"client 8",
          "value":"8.5"
       }
    ]
}

Solution

I found out. I had to put these bot parameters

@PostMapping(value = "/exportfile/excel", produces = MediaType.APPLICATION_OCTET_STREAM_VALUE, consumes = MediaType.APPLICATION_JSON_VALUE)

Answered By - dcm50
Answer Checked By - David Marino (JavaFixing Volunteer)