Unable to test the REST API developed with Spring Boot - rest

Question

I am trying to test the REST API created with Spring Boot. Following is the signature of the method:
#RequestMapping(consumes = "multipart/form-data", method = RequestMethod.POST)
public Response<String> upload(#RequestBody CsvUploadModel form) {
Following is the details of Model Object:
private char separator;
private char quoteCharacter;
private String metricName;
private String groupName;
private MultipartFile file;
//getters and setters
I have tried accessing this service using 1. chrome Postman and 2. Simple http POST form. Every time I am getting the error: 415 : Unsupported media type.
EDIT:
Following is the bean configuration for multi part bean:
/**
* Allow file uploads
*
* #return
*/
#Bean
public MultipartConfigElement multipartConfigElement() {
MultiPartConfigFactory factory = new MultiPartConfigFactory();
factory.setMaxFileSize("500MB");
factory.setMaxRequestSize("500MB");
return factory.createMultipartConfig();
}
/**
* Get the multipart resolver
*
* #return
*/
#Bean
public MultipartResolver multipartResolver() {
return new CommonsMultipartResolver();
}
I tried changing #RequestBody to #RequestParam but it didn't work. Following is the request preview of postman.
POST /dev/wizard/upload HTTP/1.1
Host: localhost:10022
Cache-Control: no-cache
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="metricName"
test
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Content-Disposition: form-data; name="separator"
,
----WebKitFormBoundaryE19zNvXGzXaLvS5C
Am I missing anything obvious?
Thanks

Answer 1

#RequestBody CsvUploadModel form
This requires a HttpMessageConverter to be present that can read request payloads of the type multipart/form-data. Unfortunately Spring currently does not provide such a converter. There is a FormHttpMessageConverter, but that can only read simple form data (application/x-www-form-urlencoded).
In order to get your method working you should remove the #RequestBody annotation and add a parameter for the files:
upload(CsvUploadModel form, #RequestParameter(required=false) MultipartFile file)
#RequestBody is not needed for binding form data. You then have to set the file manually:
form.setFile(file);
Maybe there's a third-party converter that supports reading multipart/form-data. Neither do I use nor know any.

Answer 2

Try retrofit
<dependency>
<groupId>com.squareup.retrofit</groupId>
<artifactId>retrofit</artifactId>
<version>1.6.1</version>
</dependency>
.
import retrofit.http.Body;
import retrofit.http.POST;
public interface IRestController {
#POST("/api-name")
public Response api(#Body Request request);
}
.
import static org.junit.Assert.assertNotNull;
import org.junit.Test;
import retrofit.RestAdapter;
public class TestRestAPI {
private static final String SERVER = "http://localhost:8080";
private IRestController service = new RestAdapter.Builder()
.setEndpoint(SERVER).build()
.create(IRestController.class);
#Test
public void basicTest(){
Response response = service.api(new Request());
assertNotNull(response);
}
}