How to got IP from NGINX | #ip #express #nginx

Step 1: NGINX

Changes in /etc/nginx/conf.d/default.conf file:

server {
  # etc.

  location / {
    proxy_set_header  X-Real-IP  $remote_addr;

    # etc.
  }
}

Step 2: Express middlewares

2.1: IP detector middleware

mws/ip-detector.js

module.exports = function (req, res, next) {
  // NOTE: http://code-samples.space/notes/601d00a80883d4603bb0e8ab

  req.clientIp = req.headers['x-real-ip']

  next()
}

2.2: Consumer middleware for example

mws/geoip-lite.js

const geoip = require('geoip-lite')

module.exports = function (req, res, next) {
  if (!!req.clientIp) {
    // NOTE: https://www.npmjs.com/package/geoip-lite#looking-up-an-ip-address
    req.geo = geoip.lookup(req.clientIp)
  }

  next()
}

2.3: Server script sample

run.js

const app = require('express')()
const PORT = process.env.PORT ? Number(process.env.PORT) : 3000
const ipDetectorMW = require('./mws/ip-detector')
const geoipLiteMW = require('./mws/geoip-lite')

app.use('*', ipDetectorMW, geoipLiteMW)
// NOTE: For example: const ip = req.clientIp; const geo = req.geo;

server.listen(PORT, (err) => {
  if (err) throw err
  console.log(`> Ready on http://localhost:${PORT}`)
})

Sample

http://code-samples.space/e-api/common/my-ip