使用@FeignClient时如何传递多个RequestHeader

Question

我需要使用 @FeignClient

传递多个请求 Headers

当它的一个 header 类型为 String 时，@RequestHeader 工作正常但有多个时我得到 RequestHeader.value() 是空的在参数 0 上，启动时出现 spring boot 错误。

           @RequestMapping(value="/*********employees", method= RequestMethod.GET , consumes = MediaType.APPLICATION_JSON_VALUE)
EmployeeData fetchWorkdayEmployeess(@RequestHeader Map<String, Object> headers);

以及我尝试使用@HeaderMap

    @RequestMapping(value="/*********employees", method= RequestMethod.GET , consumes = MediaType.APPLICATION_JSON_VALUE)
EmployeeData fetchWorkdayEmployeess(@HeaderMap Map<String, Object> headers);

我也试过将多个@RequestHeaders作为参数传递，但它似乎不起作用

Answer 1

我需要使用自定义 RequestInterceptor

@Configuration
class FeignCustomHeaderConfig {

    @Bean
    public CSODHeaderAuthRequestInterceptor basicAuthRequestInterceptor() {
        try {
            return new HeaderAuthRequestInterceptor(token_map);
        } catch (Exception e) {
            log.error(e.getLocalizedMessage());
        }
        return new CSODHeaderAuthRequestInterceptor(null);
    }

    class HeaderAuthRequestInterceptor implements RequestInterceptor {

        //Expensive OAuth2 flow logic
        private HashMap<String, String> tokenMap;

        public HeaderAuthRequestInterceptor(HashMap<String, String> tokenMap) {
            this.tokenMap = tokenMap;
        }

        @Override
        public void apply(RequestTemplate requestTemplate) {
            if(tokenMap == null)
                return;
            requestTemplate.header(key1, tokenMap.get(key1));
            requestTemplate.header(key2, tokenMap.get(key2));
            ....
        }
    }

然后将配置class添加到你的feign client

@FeignClient(name="....",url="...",configuration=FeignCustomHeaderConfig.class)

Reference link here :

使用@FeignClient时如何传递多个RequestHeader

How to pass multiple RequestHeader when using @FeignClient

spring-boot

spring-cloud-feign

feign