How to receive request body data along with multi-part image file?

Question

I want to receive multi-part image file with request body data, but could not able to figure it out, why it is throwing org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream' not supported exception

Below is my implementation

public ResponseEntity<GlobalResponse> createUser(@Valid @RequestPart("json") UserDTO userDTO ,@RequestPart(value ="file", required=false)MultipartFile file) throws IOException {

      //Calling some service

      return new ResponseEntity<>( HttpStatus.OK);
}

EDIT: This is my postman configuration

what do you mean by not working? does it throws any error? please elaborate more — Mustahsan, Sep 20 '19 at 09:57
@Mustahsan It is throwing org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream' not supported exception — camelCode, Sep 20 '19 at 10:03
can u share RequestMapping configuration you use above this method? — Mustahsan, Sep 20 '19 at 10:04
@ValentynRiabukhin Right now, I am testing the API with Postman — camelCode, Sep 20 '19 at 10:04
Can you check the headers you are specifying? Or can you share your headers here. — Garvit Khamesra, Sep 20 '19 at 10:06
@Mustahsan I am using @Postmapping("/api/v1/user) instead of request mapping — camelCode, Sep 20 '19 at 10:06
@cameCode could u generate request payload from postman and show it? I think u can find solution here: https://stackoverflow.com/questions/21329426/spring-mvc-multipart-request-with-json — Valentyn Riabukhin, Sep 20 '19 at 10:08

score 2 · Accepted Answer · answered Sep 20 '19 at 10:18

2

Since you're sending data in form-data which can send data in key-value pairs. Not in RequestBody so you need to modify your endpoint like this:

@PostMapping(value = "/createUser")
public ResponseEntity createUser(@RequestParam("json") String json, @RequestParam("file") MultipartFile file) throws IOException {
    ObjectMapper objectMapper = new ObjectMapper();
    UserDTO userDTO = objectMapper.readValue(json, UserDTO.class);
    // Do something
    return new ResponseEntity<>(HttpStatus.OK);
}

You need to receive your UserDTO object in String representation and then map it to UserDTO using ObjectMapper. This will allow you to receive MultipartFile and UserDTO using form-data.

answered Sep 20 '19 at 10:18

Mushif Ali Nawaz

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Can you tell me , what is package name of ObjectMapper class as there are multiple ObjectMapper class – camelCode Sep 20 '19 at 10:31
@camelCode `com.fasterxml.jackson.databind` – Mushif Ali Nawaz Sep 20 '19 at 10:31
@camelCode I'm glad to know that. – Mushif Ali Nawaz Sep 20 '19 at 10:48
Do you know any alternative solution, actually I want to send data as @Requestbody with the image file – camelCode Sep 20 '19 at 10:49
@camelCode with `@RequestBody` you can't send `MultipartFile`. – Mushif Ali Nawaz Sep 20 '19 at 10:52

score 0 · Answer 2 · answered Sep 20 '19 at 10:07

As per your exception: org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/octet-stream' the method is not expecting a multipart data so,

Specify request to consume MultiPart data in @RequestMapping configuration:

@Postmapping("/api/v1/user", consumes = MediaType.MULTIPART_FORM_DATA_VALUE) 
public ResponseEntity<GlobalResponse> createUser(@Valid @RequestPart("json") UserDTO userDTO ,@RequestPart(value ="file", required=false)MultipartFile file) throws IOException {

      //Calling some service

      return new ResponseEntity<>( HttpStatus.OK);
}

How to receive request body data along with multi-part image file?

2 Answers2