如何從spring-cloud-netflix-feign在Feign-Client中設置HostnameVerifier

Question

我正在嘗試將Spring Cloud Feign Client設置為使用自定義HostnameVerifier。 我需要自定義HostnameVerifier來忽略證書問題。 我怎樣才能做到這一點？

這是我當前的配置：

@FeignClient(name = "AccountSettingsClient", url = "${account.settings.service.url}", decode404 = true,
        configuration = AccountSettingsClientConfig.class, fallbackFactory = AccountSettingsClientFallbackFactory.class)
public interface AccountSettingsClient {
    @RequestMapping(method = RequestMethod.GET, value = "/settings/{uuid}")
    AccountSettings accountSettings(@PathVariable("uuid") String uuid);
}

@Component
@Slf4j
class AccountSettingsClientFallbackFactory implements FallbackFactory<AccountSettingsClient> {
    @Override
    public AccountSettingsClient create(Throwable cause) {
        return uuid -> {
            log.warn("Falling back to null.", cause);
            return null;
        };
    }
}

@Configuration
@RequiredArgsConstructor
@EnableConfigurationProperties(SomeProperties.class)
@EnableFeignClients
public class AccountSettingsClientConfig {
     private final SomeProperties someProperties;

     @Bean
     RequestInterceptor oauth2FeignRequestInterceptor() {
         return new OAuth2FeignRequestInterceptor(new 
            DefaultOAuth2ClientContext(), resource());
     }
}

Answer 1

默認情況下，會創建一個帶有HttpURLConnection的LoadBalancerFeignClient，並且不能覆蓋其HostnameVerifier的設置。 為了覆蓋它，選擇另一個客戶端，例如OkHttp或Apache Http Client，添加相應的maven依賴項，然后可以使用所有設置覆蓋該客戶端。

我選擇了OkHttpClient並添加到我的AccountSettingsConfig跟隨bean：

@Bean
public okhttp3.OkHttpClient okHttpClient() {
    return new OkHttpClient.Builder().hostnameVerifier((s, sslSession) -> true)
            .build();
}