Spring MVC + Springfox 2.9.2 downloads damaged PDF - spring

Question

I have a Spring MVC project (no SpringBoot) with a GET endpoint which returns a PDF file. The PDF file is either generated manually or read from resources. I also have a SpringFox dependency to generate swagger-ui.html.
Dependency versions:
Spring: 4.3.25.RELEASE
SpringFox: 2.9.2
The problem is that when I try to download the PDF directly using the "Download file" button then the file is downloaded but somehow corrupted and impossible to open. But when I use the "Request URL" I'm able to download the PDF without any problem.
My REST request:
#RequestMapping(value = "/v1/generatePdfSync", method = RequestMethod.GET)
public ResponseEntity<Resource> generatePdfSync(#RequestParam String templateName) {
Map<String, Object> model = new HashMap<>();
model.put("title", "Hello world!");
model.put("pages", new ArrayList<>(Arrays.asList(1, 2, 3)));
byte[] bytes = pdfGenerator.generatePdf(templateName, model);
// Create response
ByteArrayResource resource = new ByteArrayResource(bytes);
return ResponseEntity.ok()
.contentType(MediaType.APPLICATION_OCTET_STREAM)
.contentLength(resource.contentLength())
.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"test.pdf\"")
.body(resource);
}
My question is whether I don't have some mistake in the request itself.

Answer 1

The error was mine, this code worked for me:
#RequestMapping(value = "/v2/generatePdfSync", method = RequestMethod.POST, produces = {MediaType.APPLICATION_PDF_VALUE, MediaType.APPLICATION_OCTET_STREAM_VALUE, MediaType.APPLICATION_JSON_UTF8_VALUE, MediaType.APPLICATION_JSON_VALUE})
public ResponseEntity<Resource> generatePdfSync(#RequestBody GeneratePdfRequest generatePdfRequest) {
// Map<String, Object> model = new HashMap<>();
// model.put("title", "Hello world!");
// model.put("pages", new ArrayList<>(Arrays.asList(1, 2, 3)));
LOGGER.info("GeneratePdfSync: {}", generatePdfRequest);
byte[] bytes = pdfGenerator.generatePdf(generatePdfRequest.getTemplateName(), generatePdfRequest.getTemplateModel());
// Create response
ByteArrayResource resource = new ByteArrayResource(bytes);
return ResponseEntity.ok()
.contentType(MediaType.APPLICATION_OCTET_STREAM)
.contentLength(resource.contentLength())
.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + generatePdfRequest.getResultPdfName() + "\"")
.body(resource);
}