38 lines
1.4 KiB
Java
38 lines
1.4 KiB
Java
package com.imooc.utils;
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import javax.servlet.http.HttpServletRequest;
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/**
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* 用户获得用户ip的工具类
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*/
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public class IPUtil {
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/**
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* 获取请求IP:
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* 用户的真实IP不能使用request.getRemoteAddr()
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* 这是因为可能会使用一些代理软件，这样ip获取就不准确了
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* 此外我们如果使用了多级（LVS/Nginx）反向代理的话，ip需要从X-Forwarded-For中获得第一个非unknown的IP才是用户的有效ip。
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* @param request
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* @return
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*/
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public static String getRequestIp(HttpServletRequest request) {
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String ip = request.getHeader("x-forwarded-for");
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("WL-Proxy-Client-IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_CLIENT_IP");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getHeader("HTTP_X_FORWARDED_FOR");
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}
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if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
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ip = request.getRemoteAddr();
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}
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return ip;
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}
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}
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