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SpringBoot記錄Http請(qǐng)求日志的方法

更新時(shí)間：2019年03月18日 14:53:28 作者：Simeone_xu

這篇文章主要介紹了SpringBoot記錄Http請(qǐng)求日志的方法，小編覺(jué)得挺不錯(cuò)的，現(xiàn)在分享給大家，也給大家做個(gè)參考。一起跟隨小編過(guò)來(lái)看看吧

在使用Spring Boot開(kāi)發(fā) web api 的時(shí)候希望把 request，request header ，response reponse header , uri, method 等等的信息記錄到我們的日志中，方便我們排查問(wèn)題，也能對(duì)系統(tǒng)的數(shù)據(jù)做一些統(tǒng)計(jì)。

Spring 使用了 DispatcherServlet 來(lái)攔截并分發(fā)請(qǐng)求，我們只要自己實(shí)現(xiàn)一個(gè) DispatcherServlet 并在其中對(duì)請(qǐng)求和響應(yīng)做處理打印到日志中即可。

我們實(shí)現(xiàn)一個(gè)自己的分發(fā) Servlet ，它繼承于 DispatcherServlet，我們實(shí)現(xiàn)自己的 doDispatch(HttpServletRequest request, HttpServletResponse response) 方法。

public class LoggableDispatcherServlet extends DispatcherServlet {

  private static final Logger logger = LoggerFactory.getLogger("HttpLogger");

  private static final ObjectMapper mapper = new ObjectMapper();

  @Override
  protected void doDispatch(HttpServletRequest request, HttpServletResponse response) throws Exception {
    ContentCachingRequestWrapper requestWrapper = new ContentCachingRequestWrapper(request);
    ContentCachingResponseWrapper responseWrapper = new ContentCachingResponseWrapper(response);
    //創(chuàng)建一個(gè) json 對(duì)象，用來(lái)存放 http 日志信息
    ObjectNode rootNode = mapper.createObjectNode();
    rootNode.put("uri", requestWrapper.getRequestURI());
    rootNode.put("clientIp", requestWrapper.getRemoteAddr());
    rootNode.set("requestHeaders", mapper.valueToTree(getRequestHeaders(requestWrapper)));
    String method = requestWrapper.getMethod();
    rootNode.put("method", method);
    try {
      super.doDispatch(requestWrapper, responseWrapper);
    } finally {
      if(method.equals("GET")) {
        rootNode.set("request", mapper.valueToTree(requestWrapper.getParameterMap()));
      } else {
        JsonNode newNode = mapper.readTree(requestWrapper.getContentAsByteArray());
        rootNode.set("request", newNode);
      }

      rootNode.put("status", responseWrapper.getStatus());
      JsonNode newNode = mapper.readTree(responseWrapper.getContentAsByteArray());
      rootNode.set("response", newNode);

      responseWrapper.copyBodyToResponse();

      rootNode.set("responseHeaders", mapper.valueToTree(getResponsetHeaders(responseWrapper)));
      logger.info(rootNode.toString());
    }
  }

  private Map<String, Object> getRequestHeaders(HttpServletRequest request) {
    Map<String, Object> headers = new HashMap<>();
    Enumeration<String> headerNames = request.getHeaderNames();
    while (headerNames.hasMoreElements()) {
      String headerName = headerNames.nextElement();
      headers.put(headerName, request.getHeader(headerName));
    }
    return headers;

  }

  private Map<String, Object> getResponsetHeaders(ContentCachingResponseWrapper response) {
    Map<String, Object> headers = new HashMap<>();
    Collection<String> headerNames = response.getHeaderNames();
    for (String headerName : headerNames) {
      headers.put(headerName, response.getHeader(headerName));
    }
    return headers;
  }

在 LoggableDispatcherServlet 中，我們可以通過(guò) HttpServletRequest 中的 InputStream 或 reader 來(lái)獲取請(qǐng)求的數(shù)據(jù)，但如果我們直接在這里讀取了流或內(nèi)容，到后面的邏輯將無(wú)法進(jìn)行下去，所以需要實(shí)現(xiàn)一個(gè)可以緩存的 HttpServletRequest。好在 Spring 提供這樣的類(lèi)，就是 ContentCachingRequestWrapper 和 ContentCachingResponseWrapper，根據(jù)官方的文檔這兩個(gè)類(lèi)正好是來(lái)干這個(gè)事情的，我們只要將 HttpServletRequest 和 HttpServletResponse 轉(zhuǎn)化即可。

HttpServletRequest wrapper that caches all content read from the input stream and reader, and allows this content to be retrieved via a byte array.
Used e.g. by AbstractRequestLoggingFilter. Note: As of Spring Framework 5.0, this wrapper is built on the Servlet 3.1 API.

HttpServletResponse wrapper that caches all content written to the output stream and writer, and allows this content to be retrieved via a byte array.
Used e.g. by ShallowEtagHeaderFilter. Note: As of Spring Framework 5.0, this wrapper is built on the Servlet 3.1 API.

實(shí)現(xiàn)好我們的 LoggableDispatcherServlet后，接下來(lái)就是要指定使用 LoggableDispatcherServlet 來(lái)分發(fā)請(qǐng)求。

@SpringBootApplication
public class SbDemoApplication implements ApplicationRunner {

  public static void main(String[] args) {
    SpringApplication.run(SbDemoApplication.class, args);
  }
  @Bean
  public ServletRegistrationBean dispatcherRegistration() {
    return new ServletRegistrationBean(dispatcherServlet());
  }
  @Bean(name = DispatcherServletAutoConfiguration.DEFAULT_DISPATCHER_SERVLET_BEAN_NAME)
  public DispatcherServlet dispatcherServlet() {
    return new LoggableDispatcherServlet();
  }
}

增加一個(gè)簡(jiǎn)單的 Controller 來(lái)測(cè)試一下

@RestController
@RequestMapping("/hello")
public class HelloController {

  @RequestMapping(value = "/word", method = RequestMethod.POST)
  public Object hello(@RequestBody Object object) {
    return object;
  }
}

使用 curl 發(fā)送一個(gè) Post 請(qǐng)求：

$ curl --header "Content-Type: application/json" \
 --request POST \
 --data '{"username":"xyz","password":"xyz"}' \
 http://localhost:8080/hello/word
{"username":"xyz","password":"xyz"}

查看打印的日志：

{
  "uri":"/hello/word",
  "clientIp":"0:0:0:0:0:0:0:1",
  "requestHeaders":{
    "content-length":"35",
    "host":"localhost:8080",
    "content-type":"application/json",
    "user-agent":"curl/7.54.0",
    "accept":"*/*"
  },
  "method":"POST",
  "request":{
    "username":"xyz",
    "password":"xyz"
  },
  "status":200,
  "response":{
    "username":"xyz",
    "password":"xyz"
  },
  "responseHeaders":{
    "Content-Length":"35",
    "Date":"Sun, 17 Mar 2019 08:56:50 GMT",
    "Content-Type":"application/json;charset=UTF-8"
  }
}

當(dāng)然打印出來(lái)是在一行中的，我進(jìn)行了一下格式化。我們還可以在日志中增加請(qǐng)求的時(shí)間，耗費(fèi)的時(shí)間以及異常信息等。

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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