node ip 주소확인 > 질문답변

function getUserIP(req){
    var ipAddress;

    if(!!req.hasOwnProperty('sessionID')){
        ipAddress = req.headers['x-forwarded-for'];
    } else{
        if(!ipAddress){
            var forwardedIpsStr = req.headers['x-forwarded-for'];

            if(forwardedIpsStr){
                var forwardedIps = forwardedIpsStr.split(',');
                ipAddress = forwardedIps[0];
            }
            if(!ipAddress){
                ipAddress = req.connection.remoteAddress;
            }
        }
    }
    return ipAddress;
}



사용법
< http >
http.createServer(function(req, res){
    getUserIP(req);
}).listen(8001);

< socket.io >
socket.on("connection", function(socket){
    getUserIP(socket.handshake);
});