Geo IP node / express

geoip.js

const requestIp = require('request-ip');

function getIp (req) {
    let ip = null;

    try {
        //ip = (req.headers['x-forwarded-for'] || '').split(',').pop() ||
        //    req.connection.remoteAddress ||
        //    req.socket.remoteAddress ||
        //    req.connection.socket.remoteAddress;

        ip = requestIp.getClientIp(req);
    } catch(e) {}

    try {
        if (req.headers['cf-connecting-ip']) ip = req.headers['cf-connecting-ip'];
    } catch(e){}

    return ip;
}

app.get('/location', (req, res) => {
    let { ip } = req.query;
    if (!ip) ip = getIp(req);

    if (!ip || ip == '::1') return res.status(400).send('cannot request location from invalid IP or localhost');

    var geo = geoip.lookup(ip);

    if (!geo) return res.status(404).send('not found');

    if (geo.city && geo.region && geo.country)
        geo.location = `${ geo.city }, ${ geo.region }, ${ geo.country }`;

    if (geo.ll) { geo.lat = geo.ll[0]; geo.long = geo.ll[1]; }

    geo.ip = ip;

    res.json(geo);
});