一、node代码
const app = express();
app.get("/abc", (req, res) => {const forwardedForHeader = req.get("X-Forwarded-For");const realIpHeader = req.get("X-Real-IP");let realIp = null;if (forwardedForHeader && forwardedForHeader.length > 0) {// 逗号分隔的IP地址列表，取第一个地址为真实IPrealIp = forwardedForHeader.split(",")[0].trim();} else if (realIpHeader) {// 如果X-Forwarded-For未设置，则使用X-Real-IPrealIp = realIpHeader.trim();}if (!realIp) {realIp = req.socket.remoteAddress;}logger.info(realIp, "------真实ip------");
})
二、nginx配置(必须配置)
location ^~ /api {proxy_pass http://127.0.0.1:1111/a/;proxy_set_header Host 127.0.0.1;proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
如果没配置，那么就可能拿不到真实ip
)
