Java无法获取真实IP解决方案

问题

最近在写博客浏览量的时候，设计了这么一个逻辑：同一个IP浏览一遍文章，5分钟内不刷新次数。就需要在服务器端得到用户的真实IP，我代码是这样写的(从网上找的方法)：

public static String getRealIp(HttpServletRequest request) {String ip = request.getHeader('x-forwarded-for');String unknown = 'unknown';if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader('Proxy-Client-IP');}if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader('WL-Proxy-Client-IP');}if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader('HTTP_CLIENT_IP');}if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader('HTTP_X_FORWARDED_FOR');}if (ip == null || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();}return ip;}

发现得到的IP总172开头的IP，我查了下是本地局域网的IP，我的项目又是docker布署的，这又记我联想到docker内部的IP。。。

解决办法

最后才发现nginx代理接口的时候，需要做获取IP的配置

location ^~ /api { proxy_pass http://127.0.0.1:8110/; proxy_read_timeout 90; #得到请求真实IP proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header HTTP_X_FORWARDED_FOR $remote_addr; proxy_set_header X-Forwarded-Proto $scheme; proxy_redirect default;}

加上面面的配置，问题解决！

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