在 Feign 客户端 + Spring Cloud (Brixton RC2) 中使用 @Headers 和动态值

Question

是否可以将动态值设置为 header？

@FeignClient(name="Simple-Gateway")
interface GatewayClient {
    @Headers("X-Auth-Token: {token}")
    @RequestMapping(method = RequestMethod.GET, value = "/gateway/test")
        String getSessionId(@Param("token") String token);
    }

注册 RequestInterceptor 的实现添加 header 但无法动态设置 header 值

@Bean
    public RequestInterceptor requestInterceptor() {

        return new RequestInterceptor() {

            @Override
            public void apply(RequestTemplate template) {

                template.header("X-Auth-Token", "some_token");
            }
        };
    }

我在 github 上发现了以下问题，其中一位评论者 (lpborges) 试图在 [=] 中使用 headers 做类似的事情14=]注解.

https://github.com/spring-cloud/spring-cloud-netflix/issues/288

亲切的问候

Answer 1

解决方案是使用@RequestHeader注解，而不是feign特定的注解

@FeignClient(name="Simple-Gateway")
interface GatewayClient {    
    @RequestMapping(method = RequestMethod.GET, value = "/gateway/test")
    String getSessionId(@RequestHeader("X-Auth-Token") String token);
}

Answer 2

我有这个例子，我使用@HeaderParam 代替@RequestHeader :

import rx.Single;

import javax.ws.rs.Consumes;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;


@Consumes(MediaType.APPLICATION_JSON)
public interface  FeignRepository {

  @POST
  @Path("/Vehicles")
  Single<CarAddResponse> add(@HeaderParam(HttpHeaders.AUTHORIZATION) String authorizationHeader, VehicleDto vehicleDto);

}

Answer 3

@RequestHeader 对我不起作用。起作用的是：

@Headers("X-Auth-Token: {access_token}")
@RequestLine("GET /orders/{id}")
Order get(@Param("id") String id, @Param("access_token") String accessToken);

Answer 4

我用@HeaderMap as it seems very handy if you are working with Open feign。使用这种方式，您可以动态传递 header 键和值。

@Headers({"Content-Type: application/json"})
public interface NotificationClient {

    @RequestLine("POST")
    String notify(URI uri, @HeaderMap Map<String, Object> headers, NotificationBody body);
}

现在创建 feign REST 客户端来调用服务端点，创建您的 header 属性映射并将其传递到方法参数中。

NotificationClient notificationClient = Feign.builder()
    .encoder(new JacksonEncoder())
    .decoder(customDecoder())
    .target(Target.EmptyTarget.create(NotificationClient.class));

Map<String, Object> headers = new HashMap<>();
headers.put("x-api-key", "x-api-value");

ResponseEntity<String> response = notificationClient.notify(new URI("https://whosebug.com/example"), headers, new NotificationBody());

Answer 5

@HeaderMap,@Header 和@Param 对我不起作用，下面是当有多个 [=17= 时使用@RequestHeader 的解决方案] 使用FeignClient传递的参数

@PostMapping("/api/channelUpdate")
EmployeeDTO updateRecord(
      @RequestHeader Map<String, String> headerMap,
      @RequestBody RequestDTO request);

调用代理的代码如下：

Map<String, String> headers = new HashMap<>();
headers.put("channelID", "NET");
headers.put("msgUID", "1234567889");
ResponseDTO response = proxy.updateRecord(headers,requestDTO.getTxnRequest());

Answer 6

您可以使用 HttpHeaders。

@PostMapping(path = "${path}", consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
ResponseEntity<?> callService(@RequestHeader HttpHeaders headers, @RequestBody Object object);

private HttpHeaders getHeaders() {
  HttpHeaders headers = new HttpHeaders();

  headers.add("Authorization", "1234");
  headers.add("CLIENT_IT", "dummy");
  return headers;
}

在 Feign 客户端 + Spring Cloud (Brixton RC2) 中使用 @Headers 和动态值

Using @Headers with dynamic values in Feign client + Spring Cloud (Brixton RC2)

spring

spring-cloud

spring-cloud-netflix