1、编写工具类IpUtils
public class IpUtils {
/**
* 访问IP：0:0:0:0:0:0:0:1
* 访问IP：192.168.1.10
*/
private static final String IP_UTILS_FLAG = ",";
private static final String UNKNOWN = "unknown";
private static final String LOCALHOST_IP = "0:0:0:0:0:0:0:1";
private static final String LOCALHOST_IP1 = "127.0.0.1";
/**
* 获取真实IP地址
* 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址。
* X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址
*/
public static String getIpAddress(HttpServletRequest request) {
//以下两个获取在k8s中，将真实的客户端IP，放到了x-Original-Forwarded-For。而将WAF的回源地址放到了 x-Forwarded-For了。
String ip = request.getHeader("X-Original-Forwarded-For");
if (StringUtils.isEmpty(ip) || UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader("X-Forwarded-For");
}
//获取nginx等代理的ip
if (StringUtils.isEmpty(ip) || 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.getHeader("HTTP_CLIENT_IP");
}
if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getHeader("HTTP_X_FORWARDED_FOR");
}
//兼容k8s集群获取ip
if (ip == null || ip.length() == 0 || UNKNOWN.equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
if (LOCALHOST_IP1.equalsIgnoreCase(ip) || LOCALHOST_IP.equalsIgnoreCase(ip)) {
//根据网卡取本机配置的IP
InetAddress iNet = null;
try {
iNet = InetAddress.getLocalHost();
} catch (Exception e) {
//log.error("getClientIp error: {}", e);
}
ip = iNet.getHostAddress();
}
}
//使用代理，则获取第一个IP地址
if (!StringUtils.isEmpty(ip) && ip.indexOf(IP_UTILS_FLAG) > 0) {
ip = ip.substring(0, ip.indexOf(IP_UTILS_FLAG));
}
return ip;
}
}
2、获取HttpServletRequest
public class HttpContextUtils {
public static HttpServletRequest getHttpServletRequest() {
return ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
}
}
3、nginx代理配置
location / {
proxy_set_header Host $host;
proxy_set_header X-real-ip $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://localhost:8080;
charset utf-8;
}
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