simple-example-cachimo.js

const express = require('express');
const axios = require('axios');
const cachimo = require('cachimo');

const app = express();
const port = 3000;

const ONESEC = 1000;
const ONEMIN = ONESEC * 60;
const ONEHOUR = ONEMIN * 60;

app.listen(port, () => console.log(`Listening on port ${port}`));

app.get('/:lang/:page', function(req, resp) {
    const lang = req.params.lang;
    const page = req.params.page;

    const key = buildKey(lang, page);
    const cached = cachimo.get(key);

    if (cached) {
        console.log(`[CACHE HIT] on Lang ${lang} Page ${page}`);
        return resp.json(cached);
    }

    console.log(`[CACHE MISS] on Lang ${lang} Page ${page}`);
    requestOnApi(lang, page)
    .then(response => {
        const items = response.data.items;

        const objs = items.map(item => buildItem(item));

        cachimo.put(key, objs, ONEHOUR*4);

        resp.json(objs);

    })
    .catch(error => {
        const errorObj = {
            'message' : error.message
        };

        if (error.response.status === 402) cachimo.put(key, errorObj, ONEMIN*15);
        resp.status(error.response.status).json(errorObj);
    })
});

function buildKey(lang, page) {
    return `lang=${lang};page=${page}`;
}

function requestOnApi(lang, page) {
    return axios.get(`https://api.github.com/search/repositories?q=language:${lang}&sort=stars&page=${page}`)
}

const buildItem = (item) => {
    return {
        'name' : item.name,
        'stars' : item.stargazers_count,
        'forks' : item.forks_count
    }
}