攔截RestTemplate的請求

RestTemplate一般用於方法內部請求調用，請求報錯時難以調試，所以可以為RestTemplate加攔截器進行調試，具體操作如下：

攔截器LoggingClientHttpRequestInterceptor：

package cn.ucmed.otaka.healthcare.interceptor;

import lombok.extern.slf4j.Slf4j;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

@Slf4j
public class LoggingClientHttpRequestInterceptor implements ClientHttpRequestInterceptor {
    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
        tranceRequest(request, body);
        ClientHttpResponse response = execution.execute(request, body);
        traceResponse(response);
        return response;
    }

    private void tranceRequest(HttpRequest request, byte[] body) throws UnsupportedEncodingException {
        log.info("======= request begin ========");

        log.info("uri : {}", request.getURI());
        log.info("method : {}", request.getMethod());
        log.info("headers : {}", request.getHeaders());
        log.info("request body : {}", new String(body, "UTF-8"));

        log.info("======= request end ========");
    }

    private void traceResponse(ClientHttpResponse response) throws IOException {
        StringBuilder inputStringBuilder = new StringBuilder();
        try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getBody(), "UTF-8"))) {
            String line = bufferedReader.readLine();
            while (line != null) {
                inputStringBuilder.append(line);
                inputStringBuilder.append('\n');
                line = bufferedReader.readLine();
            }
        }
        log.info("============================response begin==========================================");
        log.info("Status code  : {}", response.getStatusCode());
        log.info("Status text  : {}", response.getStatusText());
        log.info("Headers      : {}", response.getHeaders());
        log.info("Response body: {}", inputStringBuilder.toString());
        log.info("=======================response end=================================================");
    }
}

在啟動類里面對RestTemplate實例添加攔截器

    @Bean
    public RestTemplate getRestTemplate() {
        RestTemplate restTemplate = new RestTemplate();
        restTemplate.getInterceptors().add(new LoggingClientHttpRequestInterceptor());
        return restTemplate;
    }

效果如下：