获取请求的真实ip

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IP
   realIp = forwardedForHeader.split(",")[0].trim();
 } else if (realIpHeader) {
   // 如果X-Forwarded-For未设置，则使用X-Real-IP
   realIp = 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

三、完成