Springcloud Gateway gateway log is perfect like this

Log printing collection is a key means for debugging and locating online problems during development, and it is also a top priority. As the core module of request portal forwarding, gateway is the core module for request entrance forwarding. Reasonable and standardized log printing is very important.

• Only log printing is done here, no collection is done. The collection and summary work can be combined with ELK to monitor the log files for synchronization.
• The implementation uses gateway's GlobalFilter filter.
• The filter order of request log printing should be as low as possible.
• When printing logs, be careful to avoid confusing concurrent request logs caused by multiple printings. You can splice a large log string and print it out at once.

RequestLogFilter

Add a request input filter to print input parameter information.

@Slf4j
@Configuration
@ConditionalOnProperty(value = "log.request.enabled", havingValue = "true", matchIfMissing = true)
public class RequestLogFilter implements GlobalFilter, Ordered {

   @Override
   public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
      ServerHttpRequest request = exchange.getRequest();
      // 打印请求路径
      String path = request.getPath().pathWithinApplication().value();
      // 打印请求url
      String requestUrl = this.getOriginalRequestUrl(exchange);

      // **构建成一条长 日志，避免并发下日志错乱**
      StringBuilder reqLog = new StringBuilder(200);
      // 日志参数
      List<Object> reqArgs = new ArrayList<>();
      reqLog.append("

================ Gateway Request Start  ================
");
      // 打印路由添加占位符
      reqLog.append("===> {}: {}
");
      // 参数
      String requestMethod = request.getMethodValue();
      reqArgs.add(requestMethod);
      reqArgs.add(requestUrl);

      // 打印请求头
      HttpHeaders headers = request.getHeaders();
      headers.forEach((headerName, headerValue) -> {
         reqLog.append("===Headers===  {}: {}
");
         reqArgs.add(headerName);
         //如果有token，可以先把token解析后打印出原始报文，JwtUtil替换成自己项目里工具类
         if (AUTH_KEY.toLowerCase().equals(headerName)) {
            String value = headerValue.get(0);
            String token = JwtUtil.get