springcloud gateway webflux 获取客户端ip与端口

迷南。 2022-11-21 09:47 720阅读 0赞

springcloud gateway的request对象是ServerHttpRequest，而不是HttpServletRequest。因此获取客户端ip的方法与springboot、springmvc不一样。如下：

public class HttpUtils { 
        private static final String IP_UNKNOWN = "unknown";
        private static final String IP_LOCAL = "127.0.0.1";
        private static final String IPV6_LOCAL = "0:0:0:0:0:0:0:1";
        private static final int IP_LEN = 15;
        /** * 获取用户真实IP地址，不直接使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址, * * 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？ * 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。 * * 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130, * 192.168.1.100 * * 用户真实IP为： 192.168.1.110 * * @param request * @return */
        public static String getIpAddress(ServerHttpRequest request) { 
            HttpHeaders headers = request.getHeaders();
            String ipAddress = headers.getFirst("x-forwarded-for");
            if (ipAddress == null || ipAddress.length() == 0 || IP_UNKNOWN.equalsIgnoreCase(ipAddress)) { 
                ipAddress = headers.getFirst("Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || IP_UNKNOWN.equalsIgnoreCase(ipAddress)) { 
                ipAddress = headers.getFirst("WL-Proxy-Client-IP");
            }
            if (ipAddress == null || ipAddress.length() == 0 || IP_UNKNOWN.equalsIgnoreCase(ipAddress)) { 
                ipAddress = Optional.ofNullable(request.getRemoteAddress())
                        .map(address -> address.getAddress().getHostAddress())
                        .orElse("");
                if (IP_LOCAL.equals(ipAddress)|| IPV6_LOCAL.equals(ipAddress)) { 
                    // 根据网卡取本机配置的IP
                    try { 
                        InetAddress inet = InetAddress.getLocalHost();
                        ipAddress = inet.getHostAddress();
                    } catch (UnknownHostException e) { 
                        // ignore
                    }
                }
            }
    
            // 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 (ipAddress != null && ipAddress.length() > IP_LEN) { 
                int index = ipAddress.indexOf(",");
                if (index > 0) { 
                    ipAddress = ipAddress.substring(0, index);
                }
            }
            return ipAddress;
        }
    
        /** * 获取客户端端口 * @param request * @return */
        public static Integer getPort(ServerHttpRequest request){ 
            return request.getRemoteAddress().getPort();
        }