业务需要，获取请求方的ip，代码实现
public static String getIpAddr(HttpServletRequest request) {
String ipAddress = null;
try {
ipAddress = request.getHeader("x-forwarded-for");
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getHeader("WL-Proxy-Client-IP");
}
if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
ipAddress = request.getRemoteAddr();
if(ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")){
// 根据网卡取本机配置的IP
InetAddress inet = null;
try {
inet = InetAddress.getLocalHost();
} catch (UnknownHostException e) {
e.printStackTrace();
}
ipAddress = inet.getHostAddress();
}
}
// 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() > 15) { // "***.***.***.***".length()
// = 15
if (ipAddress.indexOf(",") > 0) {
ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
}
}
} catch (Exception e) {
ipAddress="";
}
// ipAddress = this.getRequest().getRemoteAddr();
return ipAddress;
}
但实际操作过程中获取的都是云服务器自身的ip
云服务器的ip
客户端实际ip是：
请求转发用的是Nginx，考虑可能是没有将请求方真实ip传递给后端
修改配置文件nginx.conf
将
location /api {
proxy_pass http://127.0.0.1:8181/;
#以下为新增
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr; #获取客户端真实IP
proxy_set_header REMOTE-HOST $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
修改后保存，检测文件是否正常
/usr/local/nginx/sbin/nginx -t
没问题，重新加载文件
/usr/local/nginx/sbin/nginx -s reload
再测试就没问题了