@mechanicalhuman/logger/lib/serializers/request.js

'use strict'

/**
 * Shamefully taken from https://github.com/tellnes/bunyan-middleware
 */

const { get } = require('lodash')

function processHeaderNames (property) {
  if (property && property.length) {
    return property.map(function (name) {
      return name.toLowerCase()
    })
  } else {
    return false
  }
}

function requestSerializer (req) {
  const config = require('config').get('logs.http')

  var obj = {
    method: req.method,
    url: req.originalUrl || req.url,
    headers: req.headers,
    query: req.query,
    remoteAddress: get(req, 'connection.remoteAddress'),
    remotePort: get(req, 'connection.remotePort')
  }

  const obscureHeaders = processHeaderNames(config.get('obscureHeaders'))
  const excludeHeaders = processHeaderNames(config.get('excludeHeaders'))

  if (obj.headers && (obscureHeaders || excludeHeaders)) {
    obj.headers = Object.keys(obj.headers).reduce(function (memo, name) {
      if (excludeHeaders && excludeHeaders.includes(name)) {
        return memo
      }

      if (obscureHeaders && obscureHeaders.includes(name)) {
        memo[name] = null
        return memo
      }

      memo[name] = obj.headers[name]
      return memo
    }, {})
  }

  return obj
}

module.exports = requestSerializer