日志创建RestTemplate

选项1。打开调试日志记录。

配置创建RestTemplate

默认情况下，RestTemplate依赖于标准JDK工具来建立HTTP连接。您可以切换到使用不同的HTTP库，如Apache HttpComponents @ bean public RestTemplate RestTemplate (RestTemplateBuilder) RestTemplate = builder.build(); 返回创建restTemplate; ｝

配置日志记录

application.yml 日志: 水平: org.springframework.web.client.RestTemplate:调试

第二个选项。使用拦截器

包装器响应

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.util.StreamUtils;

public final class BufferingClientHttpResponseWrapper implements ClientHttpResponse {

    private final ClientHttpResponse response;

    private byte[] body;


    BufferingClientHttpResponseWrapper(ClientHttpResponse response) {
        this.response = response;
    }

    public HttpStatus getStatusCode() throws IOException {
        return this.response.getStatusCode();
    }

    public int getRawStatusCode() throws IOException {
        return this.response.getRawStatusCode();
    }

    public String getStatusText() throws IOException {
        return this.response.getStatusText();
    }

    public HttpHeaders getHeaders() {
        return this.response.getHeaders();
    }

    public InputStream getBody() throws IOException {
        if (this.body == null) {
            this.body = StreamUtils.copyToByteArray(this.response.getBody());
        }
        return new ByteArrayInputStream(this.body);
    }

    public void close() {
        this.response.close();
    }
}

实现拦截器

package com.example.logging;

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

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpRequest;
import org.springframework.http.client.ClientHttpRequestExecution;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.http.client.ClientHttpResponse;

public class LoggingRestTemplate implements ClientHttpRequestInterceptor {

    private final static Logger LOGGER = LoggerFactory.getLogger(LoggingRestTemplate.class);

    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body,
            ClientHttpRequestExecution execution) throws IOException {
        traceRequest(request, body);
        ClientHttpResponse response = execution.execute(request, body);
        return traceResponse(response);
    }

    private void traceRequest(HttpRequest request, byte[] body) throws IOException {
        if (!LOGGER.isDebugEnabled()) {
            return;
        }
        LOGGER.debug(
                "==========================request begin==============================================");
        LOGGER.debug("URI                 : {}", request.getURI());
        LOGGER.debug("Method            : {}", request.getMethod());
        LOGGER.debug("Headers         : {}", request.getHeaders());
        LOGGER.debug("Request body: {}", new String(body, "UTF-8"));
        LOGGER.debug(
                "==========================request end================================================");
    }

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

}

配置创建RestTemplate

@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder) {
    RestTemplate restTemplate = builder.build();
    restTemplate.setInterceptors(Collections.singletonList(new LoggingRestTemplate()));
    return restTemplate;
}

配置日志记录

查看LoggingRestTemplate包，例如在application.yml中: 日志: 水平: com.example.logging:调试

选项3。使用httpcomponent

导入httpcomponent依赖项

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpasyncclient</artifactId>

配置创建RestTemplate

@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder) {
    RestTemplate restTemplate = builder.build();
    restTemplate.setRequestFactory(new HttpComponentsAsyncClientHttpRequestFactory());
    return restTemplate;
}

配置日志记录

查看LoggingRestTemplate包，例如在application.yml中: 日志: 水平: org.apache.http:调试

wire提供了太多不可读的日志，所以我使用日志记录应用程序Servlet和RestTemplate请求和响应的有效负载。

build.gradle:

compile group: 'org.zalando', name: 'logbook-spring-boot-starter', version: '2.6.2'

或Maven依赖:

<dependency>
    <groupId>org.zalando</groupId>
    <artifactId>logbook-spring-boot-starter</artifactId>
    <version>2.6.2</version>
</dependency>

应用程序。属性(或槽YAML):

logging.level.org.zalando.logbook = TRACE

RestTemplate.java:

import java.util.function.Supplier;

import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.springframework.boot.web.client.RestTemplateBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;
import org.zalando.logbook.httpclient.LogbookHttpRequestInterceptor;
import org.zalando.logbook.httpclient.LogbookHttpResponseInterceptor;

@Configuration
public class RestTemplateConfiguration {
    private final LogbookHttpRequestInterceptor logbookHttpRequestInterceptor;
    private final LogbookHttpResponseInterceptor logbookHttpResponseInterceptor;

    public RestTemplateConfiguration(LogbookHttpRequestInterceptor logbookHttpRequestInterceptor,
            LogbookHttpResponseInterceptor logbookHttpResponseInterceptor) {
        this.logbookHttpRequestInterceptor = logbookHttpRequestInterceptor;
        this.logbookHttpResponseInterceptor = logbookHttpResponseInterceptor;
    }

    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder restTemplateBuilder) {
        return restTemplateBuilder
                .requestFactory(new MyRequestFactorySupplier())
                .build();
    }

    class MyRequestFactorySupplier implements Supplier<ClientHttpRequestFactory> {
        @Override
        public ClientHttpRequestFactory get() {
            // Using Apache HTTP client
            CloseableHttpClient client = HttpClientBuilder.create()
                    .addInterceptorFirst(logbookHttpRequestInterceptor)
                    .addInterceptorFirst(logbookHttpResponseInterceptor)
                    .build();
            return new HttpComponentsClientHttpRequestFactory(client);
        }
    }
}

除了上面的讨论，这只代表了快乐的场景。如果出现错误，您可能无法记录响应。

在这种情况下加上上面所有的情况，您必须重写DefaultResponseErrorHandler并像下面那样设置它

restTemplate.setErrorHandler(new DefaultResponseErrorHandlerImpl());

application.properties

logging.level.org.springframework.web.client=DEBUG

application.yml

logging:
  level:  
    root: WARN
    org.springframework.web.client: DEBUG

您可以使用spring-rest-template-logger来记录RestTemplate HTTP流量。

在Maven项目中添加一个依赖项:

<dependency>
    <groupId>org.hobsoft.spring</groupId>
    <artifactId>spring-rest-template-logger</artifactId>
    <version>2.0.0</version>
</dependency>

然后自定义你的RestTemplate，如下所示:

RestTemplate restTemplate = new RestTemplateBuilder()
    .customizers(new LoggingCustomizer())
    .build()

确保在application.properties中启用了调试日志记录:

logging.level.org.hobsoft.spring.resttemplatelogger.LoggingCustomizer = DEBUG

现在所有的RestTemplate HTTP流量将被记录到调试级别的org.hobsoft.spring.resttemplatelogger.LoggingCustomizer。

免责声明:这个库是我写的。

下面是我用来在RestTemplate中记录整个http请求/响应而不丢失响应体信息的解决方案。Spring引导版本为<version>2.7.5</version>

1.创建LoggingInterceptor类

@Component
@Slf4j
public class LoggingInterceptor implements ClientHttpRequestInterceptor {

    @Override
    public ClientHttpResponse intercept(final HttpRequest request, final byte[] body, final ClientHttpRequestExecution execution) throws IOException {
        traceRequest(request, body);
        ClientHttpResponse response = execution.execute(request, body);
        response = traceResponse(response);
        return response;
    }

    private void traceRequest(HttpRequest request, byte[] body) throws IOException {
        if (!log.isDebugEnabled()) {
            return;
        }
        log.debug("=========================== Request Begin ===========================");
        log.debug("URI          : " + request.getURI());
        log.debug("Method       : " + request.getMethod());
        log.debug("Headers      : " + request.getHeaders());
        log.debug("Body : " + new String(body, "utf-8"));
        log.debug("============================ Request End ============================");

    }

    private ClientHttpResponse traceResponse(ClientHttpResponse response) throws IOException {
        if (!log.isDebugEnabled()) {
            return response;
        }
        ClientHttpResponse newCopiedResponse = new BufferingClientHttpResponseWrapper(response);
        StringBuilder inputStringBuilder = new StringBuilder();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(newCopiedResponse.getBody(), "UTF-8"));
        String line = bufferedReader.readLine();
        while (line != null) {
            inputStringBuilder.append(line);
            line = bufferedReader.readLine();
        }
        log.debug("=========================== Response Begin ===========================");
        log.debug("Status code   : {}", response.getStatusCode());
        log.debug("Status text   : {}", response.getStatusText());
        log.debug("Headers       : {}", response.getHeaders());
        log.debug("Response Body : {}", inputStringBuilder.toString());
        log.debug("============================ Response End ============================");
        return newCopiedResponse;

    }

    /**
     * Wrapper around ClientHttpResponse, buffers the body so it can be read repeatedly (for logging & consuming the result).
     */
    private static class BufferingClientHttpResponseWrapper implements ClientHttpResponse {

        private final ClientHttpResponse response;
        private byte[] body;

        public BufferingClientHttpResponseWrapper(ClientHttpResponse response) {
            this.response = response;
        }

        @Override
        public InputStream getBody() throws IOException {
            if (body == null) {
                body = StreamUtils.copyToByteArray(response.getBody());
            }
            return new ByteArrayInputStream(body);
        }

        @Override
        public HttpStatus getStatusCode() throws IOException {
            return this.response.getStatusCode();
        }

        @Override
        public int getRawStatusCode() throws IOException {
            return this.response.getRawStatusCode();
        }

        @Override
        public String getStatusText() throws IOException {
            return this.response.getStatusText();
        }

        @Override
        public HttpHeaders getHeaders() {
            return this.response.getHeaders();
        }

        @Override
        public void close() {
            this.response.close();
        }
    }

}

2.将其附加到RestTemplate bean

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate createRestTemplate(LoggingInterceptor loggingInterceptor) {

        RestTemplate restTemplate = new RestTemplate();
        restTemplate.setInterceptors(Collections.singletonList(loggingInterceptor));

        return restTemplate;
    }
}

3.在应用程序中应用适当的级别

logging:
  level:
    com:
      test: DEBUG