Upload multipart/form-data file in Spring boot and REST API

Question

I want to upload a .png file and storage that.when I send it with content-type=multipart/form-data I receive this Exception

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 
  'application/octet-stream' not supported .

I think my application doesn't understand form-data contentType and throws an irrelevant exception. What's wrong?

    @Controller
    public class ProfileController {
        private static final Logger logger = LoggerFactory.getLogger(ProfileController.class);

        @Autowired
        ProfileService service;

        //http : http --pretty all --form PUT localhost:8080/profile/v1?thumb=glb
        @PutMapping(value = "/v1")
        public Mono<ResponseEntity<String>> upload(@RequestPart(value = "thumb", required = false) String thumbFilterName,
                                                   @RequestPart(value = "genthumb", required = false) String genthumb,
                                                   @RequestPart("hash") String hash,
                                                   @RequestPart("uploader") Long uploader,
                                                   @RequestPart("file") MultipartFile file) throws Exception {


        System.out.println(thumbFilterName);
        System.out.println(gentumb);
        System.out.println(uploader);
        System.out.println(file);
//and doing storage stuff!
return Mono.just(ResponseEntity.ok().build());
        }
    }

and this is my Rest Client that is used for sending file. Pay attention to response.

These are screenshots of restClient. Sending file with restClient:

sending file with restClient

And this is setting headers

and this is setting headers

Mạnh Quyết Nguyễn · Accepted Answer · 2018-06-12 13:18:01Z

2

In uploader you must change @RequestPart to @RequestParam

@RequestPart("uploader") Long uploader,

Javadoc explaination:

Note that @RequestParam annotation can also be used to associate the part of a "multipart/form-data" request with a method argument supporting the same method argument types. The main difference is that when the method argument is not a String, @RequestParam relies on type conversion via a registered Converter or PropertyEditor while @RequestPart relies on HttpMessageConverters taking into consideration the 'Content-Type' header of the request part. @RequestParam is likely to be used with name-value form fields while @RequestPart is likely to be used with parts containing more complex content (e.g. JSON, XML).

answered Jun 12, 2018 at 13:18

Mạnh Quyết Nguyễn

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1 Comment

hamed Over a year ago

hi , realy realy thanks for replying , it's worked :)

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