package com.panzhihua.sangeshenbian.utils;
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import javax.servlet.http.HttpServletRequest;
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public class IpUtils {
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public static String getClientIp(HttpServletRequest request) {
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String ip = null;
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// 1. 优先检查代理头信息(需注意头可能被伪造)
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String[] headers = {"X-Forwarded-For", "Proxy-Client-IP", "WL-Proxy-Client-IP"};
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for (String header : headers) {
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ip = request.getHeader(header);
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if (isValidIp(ip)) {
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// 处理多层代理情况(X-Forwarded-For可能有多个逗号分隔的IP)
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return ip.contains(",") ? ip.split(",")[0].trim() : ip;
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}
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}
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// 2. 无代理头时使用默认方法
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ip = request.getRemoteAddr();
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// 处理IPv6本地地址格式
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return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : ip;
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}
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private static boolean isValidIp(String ip) {
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return ip != null && ip.length() != 0
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&& !"unknown".equalsIgnoreCase(ip);
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}
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}
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