Sniff NodeJS

sniff.js

    app.use((req, res, next) => {
      try {
        var sniff_data = {}
        sniff_data.host = req.headers && req.headers.host
        sniff_data.url = req.url
        sniff_data.method = req.method
        sniff_data.user_agent = req.headers && req.headers['user-agent']
        sniff_data.ip_address = {}

        if (req.connection && req.connection.socket && req.connection.socket.remoteAddress) {
          sniff_data.ip_address.ip = sniff_data.ip_address.socketRemoteAddress = req.connection.socket.remoteAddress
        }
        if (req.socket && req.socket.remoteAddress) {
          sniff_data.ip_address.ip = sniff_data.ip_address.remoteAddress = req.socket.remoteAddress
        }
        if (req.connection && req.connection.remoteAddress) {
          sniff_data.ip_address.ip = sniff_data.ip_address.remoteAddress = req.connection.remoteAddress
        }
        if (req.headers['x-forwarded-for']) {
          sniff_data.ip_address.ip = sniff_data.ip_address['x-forwarded-for'] = req.headers['x-forwarded-for']
        }
        logger.info('SNIFF', JSON.stringify(sniff_data))

        next()
      } catch (err) {
        logger.error('Fatal', JSON.stringify(err.stack))
        res.status(500).json( {'error': 'INTERNAL_SERVER_ERROR'} )
      }
    })