REST multipart mixed request (file+json) with Spring

Question

I need to send a file alongside with a json to my Spring Controller. I have the following controller class:

@Controller
@RequestMapping(\"/perform\")
public cla         


        

Answer 1

The consumes thing in the other answers didn't do crap for me. The key was getting the specific multipart/* types I wanted to support onto some headers key in the RequestMapping. It was really difficult to figure out, mostly guess work and stare at the Spring source code. I'm kind-of underwhelmed with Spring's support for this, but I have managed to make it work in our Spring Boot App, but only with Tomcat?!? Something called the MultipartResolver chokes when you configure your Boot application to use Jetty...so long Jetty. But I digress...

In my Controller I set up for multipart/mixed or multipart/form-data like...

@RequestMapping(value = "/user/{userId}/scouting_activities", method = RequestMethod.POST,
        headers = {"content-type=multipart/mixed","content-type=multipart/form-data"})
public ResponseEntity POST_v1_scouting_activities(
        @RequestHeader HttpHeaders headers,
        @PathVariable String userId,
        @RequestPart(value = "image", required = false) MultipartFile image,
        @RequestPart(value = "scouting_activity", required = true) String scouting_activity_json) {
  LOG.info("POST_v1_scouting_activities: headers.getContentType(): {}", headers.getContentType());
  LOG.info("POST_v1_scouting_activities: userId: {}", userId);
  LOG.info("POST_v1_scouting_activities: image.originalFilename: {}, image: {}",
          (image!=null) ? image.getOriginalFilename() : null, image);
  LOG.info("POST_v1_scouting_activities: scouting_activity_json.getType().getName(): {}, scouting_activity: {}",
          scouting_activity_json.getClass().getName(), scouting_activity_json);
  return new ResponseEntity("POST_v1_scouting_activities\n", HttpStatus.OK);
}

That headers thing let it uniquely identify the multipart content types it was willing to take a shot at. This lets curls like...

curl -i -X POST 'http://localhost:8080/robert/v1/140218/scouting_activities' \
-H 'Content-type:multipart/mixed' \
-F 'image=@Smile_128x128.png;type=image/png' \
-F 'scouting_activity={
  "field": 14006513,
  "longitude": -93.2038253,
  "latitude": 38.5203231,
  "note": "This is the center of Dino Head.",
  "scouting_date": "2017-01-19T22:56:04.836Z"
};type=application/json'

...or...

curl -i -X POST 'http://localhost:8080/robert/v1/140218/scouting_activities' \
-H 'Content-type:multipart/form-data' \
-F 'image=@Smile_128x128.png;type=image/png' \
-F 'scouting_activity=@scoutingFrackingCurl.json;type=application/json'

work.