CODEWITHSUNDEEP
javaspringspring-boot
Victor Henrique
Victor Henrique

Reputation: 327

What the difference between RestTemplate x Feign Client?

I tried to build a Spring Feign Client to encapsulate the call to an internal API. In this request, I need to make a login in order to get a token and then use it as a Header parameter for my new request. To set the token dynamically, I used the code below.

@FeignClient(value = "APIBuscarCep", url = "${url}")
public interface BuscarCepFeignClient {

    @RequestMapping(method = RequestMethod.GET, value = "url-complement", produces = "application/json")
    @Headers({"Authorization: {token}"})
    CepResponseDTO getAddressByCep(@Param("token") String token, @NotNull @PathVariable("cep") String cep);
}

Unfortunately, besides the login goes right and get token, my request always returns the 403 code. (I used postman to check if the request should return successfully).

The only solution that works was using restTemplate like the code below.

HttpHeaders headers = new HttpHeaders();

headers.setContentType(MediaType.APPLICATION_JSON);
headers.add("Authorization", token);
ResponseEntity<CepResponseDTO> exchange;

exchange = restTemplate.exchange(String.format("%s%s", endpoint, cep),              
                                 HttpMethod.GET, header, CepResponseDTO.class);

Question

Specs

Using Spring boot 2.

Upvotes: 4

Views: 14375

Answers (1)

Xavier FRANCOIS
Xavier FRANCOIS

Reputation: 712

You can't use dynamic value in @Header annotation. However, you can use @RequestHeader annotation in the input param to do this.

@FeignClient(value = "APIBuscarCep", url = "${url}")
public interface BuscarCepFeignClient {

    @RequestMapping(method = RequestMethod.GET, value = "url-complement", produces = "application/json")
    CepResponseDTO getAddressByCep(@RequestHeader("Authorization") String token, @NotNull @PathVariable("cep") String cep);
}

Upvotes: 5

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