35 lines
1.5 KiB
Java
35 lines
1.5 KiB
Java
package com.cowr.common.utils;
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import javax.servlet.http.HttpServletRequest;
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public class ReqUtil {
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/**
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* 获取用户真实IP地址，不使用request.getRemoteAddr();的原因是有可能用户使用了代理软件方式避免真实IP地址,
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* 可是，如果通过了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP值，究竟哪个才是真正的用户端的真实IP呢？
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* 答案是取X-Forwarded-For中第一个非unknown的有效IP字符串。
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* 如：X-Forwarded-For：192.168.1.110, 192.168.1.120, 192.168.1.130, 192.168.1.100
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* 用户真实IP为： 192.168.1.110
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* @param request
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* @return
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*/
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public static String getIpAddress(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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