java获取IP 基于java配置nginx获取真实IP代码实例

时间:2021-03-16 小猪夫人气:1

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1、java代码

/** 获取客户端IP */
  public static final String getClientIp(HttpServletRequest request) {
    String ip = request.getHeader("X-Forwarded-For");
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)|| "127.0.0.1".equalsIgnoreCase(ip)) {
      ip = request.getHeader("Proxy-Client-IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)|| "127.0.0.1".equalsIgnoreCase(ip)) {
      ip = request.getHeader("WL-Proxy-Client-IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)|| "127.0.0.1".equalsIgnoreCase(ip)) {
      ip = request.getHeader("X-Real-IP");
    }
    if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip)|| "127.0.0.1".equalsIgnoreCase(ip)) {
      ip = request.getRemoteAddr();
    }
    if (StringUtils.isBlank(ip) ||"127.0.0.1".equals(ip)|| ip.indexOf(":") > -1) {
      try {
        ip = InetAddress.getLocalHost().getHostAddress();
      } catch (UnknownHostException e) {
        ip = null;
      }
    }
    // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
    if (ip != null && ip.length() > 15) {
      if (ip.indexOf(",") > 0) {
        ip = ip.substring(0, ip.indexOf(","));
      }
    }
    return ip;
  }

2、nginx需要进行相应修改,重点 proxy_set_header

server {
    listen  xxxx;
    server_name 127.0.0.1;
    # 静态页面目录
    root   xxxxxxxxxx;
    # 默认首页
    index   login.html;
    proxy_set_header Host $http_host;       
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header REMOTE-HOST $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    add_header Access-Control-Allow-Origin *;
    add_header Access-Control-Allow-Methods 'GET,POST';
    add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
    #proxy_cookie_path /* /*;
    client_max_body_size  100m;

    location / {
      proxy_set_header Host $http_host;       
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header REMOTE-HOST $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection "upgrade";
      add_header Access-Control-Allow-Origin *;
      add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
      add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
      ......
    }
  }

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