Spring RestTemplate 利用攔截器列印請求引數和返回狀態
阿新 • • 發佈:2018-12-11
最近在專案中遇到用RestTemplate請求另外一個服務介面,發現總是報400返回。或許由於對400錯誤不是很瞭解,除錯了很久。但是過了好一段時間,發現自己進展不大,由此,諮詢下了經驗豐富的人,也解決了RestTemplate請求另外服務介面的方法。
很多人都基本用Spring注入的RestTemplate,程式碼如下:
@Autowired
private RestTemplate restTemplate;
但是在請求的時候,發現總是返回400.應該是引數問題,然後就採用別人幫忙寫的一個類,去檢查自己請求引數是否完整,返回引數,定義一個類
LoggingClientHttpRequestInterceptor去實現
ClientHttpRequestInterceptor
程式碼結構如下:
public class LoggingClientHttpRequestInterceptor implements ClientHttpRequestInterceptor { private final static Logger LOGGER = LoggerFactory.getLogger(LoggingClientHttpRequestInterceptor.class); @Override public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException { traceRequest(request, body); ClientHttpResponse response = execution.execute(request, body); traceResponse(response); return response; } private void traceRequest(HttpRequest request, byte[] body) throws IOException { 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 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(); } } LOGGER.debug("============================response begin=========================================="); LOGGER.debug("Status code : {}", response.getStatusCode()); LOGGER.debug("Status text : {}", response.getStatusText()); LOGGER.debug("Headers : {}", response.getHeaders()); LOGGER.debug("Response body: {}", inputStringBuilder.toString());//WARNING: comment out in production to improve performance LOGGER.debug("=======================response end================================================="); } }
很多人一看此類,其實都覺得簡單,但是在實際中很大作用。定義好此類後,想法,將這個攔截器新增到restTempate中,這裡有兩種方法,
1.重新在配置類中定義一個bean。程式碼如下:
@Bean public RestTemplate restTemplate() { RestTemplate restTemplate = new RestTemplate(); restTemplate.setInterceptors(Collections.singletonList(loggingClientHttpRequestInterceptor)); return restTemplate; }
2.可以直接用此方法加入攔截器。
restTemplate.getInterceptors().add(new LoggingClientHttpRequestInterceptor());
確實好久沒有寫文章了,發現又懶了。有些東西沒去做,後來發現時間還是流逝,能在想到的,就去嘗試的去做。在此,祝願看此文章的瀏覽者中秋快樂。