api.js

import axios from 'axios'
import cache from '../utils/cache'

export function get(slug) {
  const url  = `${process.env.GILBERT_URL}/api/v1/content/pages/${slug}`
  const call = axios.get(url)

  return cache({
    key: slug,
    exp: 120,
    callback: call
  })
}

export default {
  get
}

cache.js

import axios from 'axios'
import redis from './redis'

const client = redis.createClient()

export default function cache({key, exp, callback}) {
  return new Promise((resolve, reject) => {
    return client.get(key, (err, data) => {
      if (data !== null) {
        resolve(JSON.parse(data))
      } else {
        callback.then((response) => {
          client.setex(key, exp, JSON.stringify(response.data))
          resolve(response.data)
        }).catch(reject)
      }
    })
  })
}