spring-boot - 使用 Spring Boot WebClient 时如何拦截请求

Question

我正在尝试使用 WebClient调用我的restServices。以前在 RestTemplate , 我们有 ClientHttpRequestInterceptor定义并附加到 RestTemplate拦截和修改请求。与 WebClient ，有没有办法做同样的事情？

谢谢，

-斯里尼

Answer 1

当您使用 WebClient Builder 时，您可以传入 ExchangeFilterFunction 的实现。接口(interface)使用filter()方法。这相当于 ClientHttpRequestInterceptor对于 RestTemplate .
WebClient 生成器文档:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/reactive/function/client/WebClient.Builder.html#filter-org.springframework.web.reactive.function.client.ExchangeFilterFunction-
ExchangeFilterFunction 文档:https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/reactive/function/client/ExchangeFilterFunction.html
例如:

WebClient webClient = WebClient.builder()
        .baseUrl("http://localhost:8080|)
        .filter(logFilter())
        .build();


private ExchangeFilterFunction logFilter() {
    return (clientRequest, next) -> {
        logger.info("External Request to {}", clientRequest.url());
        return next.exchange(clientRequest);
    };
}