content: package com.java2nb.novel.core.utils;
  
  import com.fasterxml.jackson.databind.ObjectMapper;
  import jakarta.servlet.http.HttpServletRequest;
  import lombok.extern.slf4j.Slf4j;
  
  import java.net.URI;
  import java.net.http.HttpClient;
  import java.net.http.HttpRequest;
  import java.net.http.HttpResponse;
  import java.time.Duration;
  
  @Slf4j
  public class IpUtil {
  
      /**
       * 获取真实IP
       *
       * @param request 请求体
       * @return 真实IP
       */
      public static String getRealIp(HttpServletRequest request) {
          // 这个一般是Nginx反向代理设置的参数
          String ip = request.getHeader("X-Real-IP");
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
              ip = request.getHeader("X-Forwarded-For");
          }
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
              ip = request.getHeader("Proxy-Client-IP");
          }
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
              ip = request.getHeader("WL-Proxy-Client-IP");
          }
          if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
              ip = request.getRemoteAddr();
          }
          // 处理多IP的情况（只取第一个IP）
          if (ip != null && ip.contains(",")) {
              String[] ipArray = ip.split(",");
              ip = ipArray[0];
          }
          return ip;
      }
  
      /**
       * 获取本机公网IP
       */
      public static String getPublicIP() {
          try {
              HttpClient client = HttpClient.newHttpClient();
              HttpRequest request = HttpRequest.newBuilder()
                  .uri(URI.create("https://httpbin.org/ip"))
                  .GET()
                  .timeout(Duration.ofSeconds(5))
                  .build();
  
              HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
  
              if (response.statusCode() == 200) {
                  return new ObjectMapper().readTree(response.body()).get("origin").asText();
              }
          } catch (Exception e) {
              log.error("获取本机公网IP异常", e);
          }
          return null;
      }
  }
  