Multiple @RequestPart not Working

[mazkozi]

Hi,

Below is my technology stack:
Spring Boot --> 2.1.6.RELEASE
spring-cloud-starter-openfeign --> 2.1.2.RELEASE
feign-form-spring --> 3.3.0

I have following code in my Interface of Rest Controller Implementation

@PostMapping(value = "/files", consumes = {MediaType.MULTIPART_FORM_DATA_VALUE})
    ResponseEntity<Output> createFile(
            @RequestPart("file") MultipartFile file,
            @RequestPart("properties") Map<String, String> properties);

My Feign client just extends this interface and it has Feign Client Annotation like below

@FeignClient(name = "feign-client", url = "${host}/store/v1/", configuration = FeignConfig.class)
public interface StoreClient extends StoreInterface {
}

When I try to start my Spring Boot app, I get below exception

Caused by: java.lang.IllegalStateException: Method has too many Body parameters: public abstract org.springframework.http.ResponseEntity au.com.macquarie.bfs.ml.store.v1.StoreClient.createFile(org.springframework.web.multipart.MultipartFile,java.util.Map)

I tried googling and adopting many solutions, but looks like this is not supported yet.

Can some one help me resolve this and get around?

[ryanjbaxter]

If you place the createFile method in the the Feign interface itself does it work?

[mazkozi]

Nope. It doesnt.

[bpzhang]

try to add a config file like this:

@Configuration
public class MultipartSupportConfig {
    @Autowired
    private ObjectFactory<HttpMessageConverters> messageConverters;

    @Bean
    public Encoder feignFormEncoder() {
        return new SpringFormEncoder(new SpringEncoder(messageConverters));
    }

}

[mazkozi]

Hi @bpzhang . I did try this and it didn't work either.

[poznachowski]

SpringMvcContract seems to process @RequestParam annotations, not @RequestPart ones.

[ryanjbaxter]

This should work as it was addressed in #62.

What version are you using?

[j-bernard]

The problem here is not to support MultipartFile but to support 2 @RequestPart . @mazkozi did you find a workaround?