How to enable Spring Reactive Web MVC to handle Multipart-file?

Question

I\'m trying to use the new reactive web-mvc implementation in a spring boot 2.0 application. I\'m trying to define a method which consume multipart file but do not succeed a

Answer 1

Okay, It seems this is just not implemented for now as it currently exists a pull request for this feature : Add reactive multipart request support #1201

Should have check this earlier...

[EDIT] : The issue has been solved and merged into Spring master branch. Should no longer be an issue.

Answer 2

@PutMapping(value="/{..}",consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public Mono<Void> save(@RequestPart("file") FilePart multipartFormData,@RequestParam("fileName") String fileName,@PathVariable("..") String ..) throws IOException {        
        List<ByteBuffer> bytesList = new LinkedList<>();

        multipartFormData.content().
          subscribe(item->bytesList.add(item.asByteBuffer()));

        int totalBytes = bytesList.stream().mapToInt(item->item.capacity()).sum();

        ByteBuffer buffer =  ByteBuffer.allocate(totalBytes);
        bytesList.stream().forEach(byteBuff->buffer.put(byteBuff));
        baseImageHandler.saveImage(buffer, fileName, baseItemId);
        return Mono.empty();
    }

Please note that it is a dev verison, but this is how I have managed to do it.