Exception when uploading Multipart from the Angularjs controller to the Spring Boot server

Question

I’m having trouble sending files (images, pdfs) from the client side to the server side of my app.

Whenever I try to send a file, Spring returns this exception:

status:"Bad Request"
exception:"org.springframework.web.multipart.support.MissingServletRequestPartException"
message:"Required request part 'file' is not present"
path:"/upload"
status:400

The Spring controller looks like this:

@RestController
@RequestMapping("/upload")
public class UploadController {

    @RequestMapping(value = "", 
                    method = RequestMethod.POST)
    public ResponseEntity<?> uploadFile(@RequestParam("file") MultipartFile file) {

        try {
            if(file != null) {
                System.out.println("Arqiuivo recebido!");
            }
        }

        catch (Exception e) {
            System.out.println("Deu erro!");
            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
        }

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

And I also set up Multipart to solve like this:

 @Bean
 public MultipartResolver multipartResolver() {
     return new CommonsMultipartResolver();
 }

In the client side, as I am using the module ng-file-upload, I am using the following div that appears on the developer’s github:

<div class="button" ngf-select ng-model="imagem" name="file" ngf-pattern="'image/*'"
  ngf-accept="'image/*'" ngf-max-size="20MB" ngf-min-height="100" 
  ngf-resize="{width: 100, height: 100}">Select
</div>

And in the Angularjs controller, I have the following:

Upload.upload({
    url: 'upload',
    data: {file: $scope.imagem}
}).progress(function (evt) {

}).success(function (data, status, headers, config) {

});

I haven’t been successful so far. Could someone help me?

EDIT

I tried to use Postman to send a pro server image, but it gives the same exception when I try to send it through my client:

Answer 1

It seems all right with your java code, maybe it’s something in your client, you already tried to send the file by curl or Postman?