CODEWITHSUNDEEP
spring-bootspring-cloud-feign
ThCollignon
ThCollignon

Reputation: 1214

FeignException "Request method 'POST' is not supported" during a GET

The server:

public interface MyClient {

   @GetMapping(value = "mypath")
   String getStuff(@RequestParam MyDto myDto);
}

@RestController
public class MyClientRestController implements MyClient {

   String getStuff(MyDto myDto) {
      return myDto.toString(); 
   }
}

The Feign config:

@FeignClient(name = "myserver", url = "${myurl}", path = "/mypath")
public interface MyFeignClient extends MyClient {}

The client call:

String foo = myFeignClient.getStuff(myDto);

Relevant parts of the error stack I get:

org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'POST' is not supported
(...)
Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed: feign.FeignException$InternalServerError: [500] during [GET] to [http://localhost.xxx:8080/mypath]`

My guess is that Feign or Spring Boot sees a complex object and implies that it's a request body of a POST request.

From a conversation with Gemini (AI), in case of a GET request, Feign and Spring Boot are supposed to convert the DTO into query params, but I can't make it work.

Upvotes: 0

Views: 25

Answers (1)

ThCollignon
ThCollignon

Reputation: 1214

Finally fix it with the use of @SpringQueryMap, documented here.

This post may be a duplicate of Feign Client GET request, throws "Method Not Allowed: Request method 'POST' not supported" from microservice

Upvotes: 0

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