A simple gifs microservice.

index.js

const app = require('express')();
const fetch = require('node-fetch');
const cache = require('memory-cache');
const request = require('request');

app.get('/', (req, res) => {
  res.status(404);
  res.json({ body: `gifs.tobihrbr.com // Get a random gif: gifs.tobihrbr.com/random // Search for a gif: // gifs.tobihrbr.com/_TERM_` });
});

const getGif = (term) => (
  new Promise((resolve, reject) => {
    const qs = 'api_key=' + process.env.GIPHY_KEY + (term !== undefined ? '&tag=' + term : '');
  
    fetch('http://api.giphy.com/v1/gifs/random?' + qs)
      .then((res) => res.json())
      .then((body) => {
        resolve(body);
      }).catch((err) => {
        reject(err);
      });
  })
);

app.get('/random', async (req, res) => {
  const data = await getGif();
  res.redirect('/gif/' + data.data.id);
});

app.get('/gif/:id', (req, res) => {
  const url = 'http://api.giphy.com/v1/gifs?api_key=' + process.env.GIPHY_KEY + '&gif_id=' + req.params.id;
  
  fetch(url)
    .then((res) => res.json())
    .then((body) => {
      if (body.meta.status !== 200) {
        res.status(404);
        return res.json({ error: 'gif not found' });
      }
    
      request.get('https://media0.giphy.com/media/' + req.params.id + '/giphy.gif').pipe(res);
    }).catch((err) => {
      res.status(500);
      res.json({ error: 'internal server error' });
    });
});

app.get('/:term', async (req, res) => {
  const data = await getGif(req.params.term);
  res.redirect('/gif/' + data.data.id);
});

app.listen(3000);

package.json

{
  "name": "gifs",
  "main": "index",
  "scripts": {
    "start": "node index.js"
  },
  "dependencies": {
    "express": "^4.15.4",
    "node-fetch": "^1.7.2",
    "memory-cache": "^0.2.0",
    "request": "^2.81.0"
  },
  "license": "MIT"
}