MyEtherAPI Proxy in Express

myetherapi_express_proxy.js

const express = require('express');
const axios = require('axios');
const bodyParser = require('body-parser');

// create our app
var app = express();
const PORT = process.env.PORT || 3000;
// body parser for json requests
app.use(bodyParser.json());

// Proxy for MyEtherAPI calls, as Google decided to classify the URL as malware
app.post('/api/rpc/eth', function (request, response, next){
    var data = request.body;
    if (data) {
        axios.post('https://api.myetherapi.com/eth', data).then((res) => {
            if (res.data) {
                response.send(res.data); // success, forward API response
            } else {
                response.status(500).send({status: 500, error: true, message: "Empty response from RPC API"}); // internal error
            }
        }).catch(e => {
            // rate limit hit, client needs to call API themself directly
            response.redirect(302, 'https://api.myetherapi.com/eth');
        });
    } else {
        response.status(400).send({status: 400, error: true, message: "No POST body"}); // bad request
    }
});
app.get('/api/rpc/eth', function (request, response, next){
    response.status(400).send({status: 400, error: true, message: "Only HTTP POST supported"}); // bad request
});

// start server
app.listen(PORT, function () {
  console.log('MyEtherAPI proxy is up on port ' + PORT);
});