package com.nova.sankuai.infra.utils;
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import lombok.extern.slf4j.Slf4j;
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import javax.servlet.http.HttpServletRequest;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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@Slf4j
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public class IpUtil {
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private static final String UNKNOWN = "unknown";
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private static final String LOCALHOST = "127.0.0.1";
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private static final String SEPARATOR = ",";
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public static String getIpAddr(HttpServletRequest request) {
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// System.out.println(request);
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// log.info("getIpAddr:{}", request);
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String ipAddress;
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try {
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ipAddress = request.getHeader("x-forwarded-for");
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if (ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = request.getHeader("Proxy-Client-IP");
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}
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if (ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = request.getHeader("WL-Proxy-Client-IP");
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}
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if (ipAddress == null || ipAddress.length() == 0 || UNKNOWN.equalsIgnoreCase(ipAddress)) {
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ipAddress = request.getRemoteAddr();
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if (LOCALHOST.equals(ipAddress)) {
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InetAddress inet = null;
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try {
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inet = InetAddress.getLocalHost();
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} catch (UnknownHostException e) {
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e.printStackTrace();
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}
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ipAddress = inet.getHostAddress();
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}
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}
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// 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
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// "***.***.***.***".length()
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if (ipAddress != null && ipAddress.length() > 15) {
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if (ipAddress.indexOf(SEPARATOR) > 0) {
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ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
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}
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}
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} catch (Exception e) {
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ipAddress = "";
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}
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return ipAddress;
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}
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}
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