index.js

#!/usr/bin/env nodejs
require('dotenv').config()
const app = require('express')();
const http = require('http').Server(app);
const ipfsAPI = require('ipfs-api');
const ipfs = ipfsAPI('127.0.0.1', '5001', {protocol: 'http'});
const bodyParser = require("body-parser");
const compress = require('compression');
const helmet = require('helmet');
const cors = require('cors');
const port = process.env.PORT || 3000;
const maxFileSize = process.env.MAXSIZE || 100000;

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(compress());
app.use(helmet());
app.use(cors());
app.options('*', cors()) 

app.post('/ipfs/', (req, res) => {
    ipfs.add(new Buffer(decodeURIComponent(req.body.data).split(",")[1], 'utf8'))
    .then((response) => res.send({success: true, hash: response[0].hash}))
    .catch((err) => res.send({success: false, error: err}))
})
app.get('/ipfs/:data', (req, res) => {
    ipfs.files.cat(req.params.data)
    .then((response) => res.send({success: true, data: 'data:image/png;base64,'+ decodeURI(Buffer(response, 'ascii').toString('utf8'))}))
    .catch((err) => res.send({success: false, error: err}))
})
app.get('/img/:data', (req, res) => {
    ipfs.files.cat(req.params.data)
    .then((response) => {
        let img = new Buffer(Buffer(response, 'ascii').toString('utf8'), 'base64');
        res.writeHead(200, {'Content-Type': 'image/png', 'Content-Length': img.length});
        res.end(img);
    })
    .catch((err) => res.send({success: false, error: err}))
})

app.get('*', (req, res) => res.send('Welcome to the Swarm City API'))
http.listen(port);