function getClientIP(req) {
return req.headers['x-forwarded-for'] || // 判断是否有反向代理 IP
req.connection.remoteAddress || // 判断 connection 的远程 IP
req.socket.remoteAddress || // 判断后端的 socket 的 IP
req.connection.socket.remoteAddress;
};

function getClientIP(req) {
return req.headers['x-forwarded-for'] || // 判断是否有反向代理 IP
req.connection.remoteAddress || // 判断 connection 的远程 IP
req.socket.remoteAddress || // 判断后端的 socket 的 IP
req.connection.socket.remoteAddress;
};