Feign content encoding

AcceptGzipEncodingFeignRequestInterceptor.java

public class AcceptGzipEncodingFeignRequestInterceptor implements RequestInterceptor {

    private static final String ACCEPT_ENCODING_HEADER = "Accept-Encoding";

    private static final String GZIP_ENCODING = "gzip";

    private static final String DEFLATE_ENCODING = "deflate";

    @Override
    public void apply(RequestTemplate template) {

        if(!template.headers().containsKey(ACCEPT_ENCODING_HEADER)) {
            template.header(ACCEPT_ENCODING_HEADER, GZIP_ENCODING, DEFLATE_ENCODING);
        }
    }
}

EnableFeignAcceptGzipEncoding.java

@Import(FeignAcceptGzipEncodingConfiguration.class)
@Inherited
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface EnableFeignAcceptGzipEncoding {
}

FeignAcceptGzipEncodingConfiguration.java

@Configuration
public class FeignAcceptGzipEncodingConfiguration {

    @Bean
    public RequestInterceptor acceptGzipEncodingFeignRequestInterceptor() {

        return new AcceptGzipEncodingFeignRequestInterceptor();
    }
}

FeignApacheHttpClientAutoConfiguration.java

@Configuration
@ConditionalOnClass({Feign.class})
public class FeignApacheHttpClientAutoConfiguration {

    @Configuration
    @ConditionalOnClass(ApacheHttpClient.class)
    protected static class HttpClientConfiguration {

        @Autowired(required = false)
        private HttpClient httpClient;

        @Bean
        public Client feignClient() {
            if (httpClient != null) {
                return new ApacheHttpClient(httpClient);
            }
            return new ApacheHttpClient();
        }
    }
}

FeignRibbonClientAutoConfiguration.java

@Configuration
@ConditionalOnClass({ ILoadBalancer.class, Feign.class })
@AutoConfigureBefore(FeignAutoConfiguration.class)
public class FeignRibbonClientAutoConfiguration {

    @Configuration
    @ConditionalOnClass(ApacheHttpClient.class)
    protected static class HttpClientConfiguration {

        @Autowired(required = false)
        private HttpClient httpClient;

        @Resource(name = "cachingLBClientFactory")
        private LBClientFactory lbClientFactory;

        @Bean
        public Client feignClient() {
            RibbonClient.Builder builder = RibbonClient.builder();

            if (httpClient != null) {
                builder.delegate(new ApacheHttpClient(httpClient));
            } else {
                builder.delegate(new ApacheHttpClient());
            }

            if (lbClientFactory != null) {
                builder.lbClientFactory(lbClientFactory);
            }

            return builder.build();
        }
    }
}