Trying to access response data using url - node.js

Question

I am trying something simple where I make a request from the front-end and fetch the JSON data on the back-end. I'm using ReactJS on the front-end and NodeJS and ExpressJS on the Back-end.
I am getting little confused with figure what the right way how I can access JSON data onto the front-end by make the name server file name from server.js or con.now.
I am getting in my console not it refused to connect the link to the server. I have been tried to name the file server.js to cors.now would that connect the server to the front-end but I was wrong.
Failed to load resource: net::ERR_CONNECTION_REFUSED
But when every do that getting an error message in my console that talks about cors.now.sh/https://us-central1-aaronklaser-1.cloudfunctions.net/medium?username=#aaron.klaser
Medium.js
import React from 'react';
import PageHeader from './PageHeader';
import PageContent from './PageContent';
import axios from 'axios';
export default class Medium extends React.Component {
state = {
posts: []
}
componentDidMount() {
this.fetchPosts().then(this.setPosts)
}
fetchPosts = () => axios.get(`https://cors.now.sh/https://us-central1-aaronklaser-1.cloudfunctions.net/medium?username=#aaron.klaser`)
setPosts = response => {
this.setState({
posts: response
})
}
render() {
return (
<div>
<PageHeader/>
<PageContent>
<pre>{JSON.stringify(this.state.posts, null, 2)}</pre>
</PageContent>
</div>
)
}
}
cors.now
const express = require('express');
const app = express();
const port = process.env.PORT || 5000;
const request = require('request');
app.get("/api/medium", (req, res) => {
if(!req.query.username){
return res.status(400).send('Error: You need to include query param ?username=#yourUsername');
} else {
return request(url,(error, response, body) => {
const url = `https://medium.com/${req.query.username}/latest?format=json`;
const prefix = `])}while(1);</x>`
const strip = payload => payload.replace(prefix, ``)
res.send(JSON.parse(strip(body)));
});
}
});
app.listen(port, () => console.log(`Listening on port ${port}`));

Answer 1

I see you're using the https://cors.now.sh site as a reverse proxy. I am not sure if that site is functioning at this time?
If you hit your API endpoint directly (https://us-central1-aaronklaser-1.cloudfunctions.net/medium?username=#aaron.klaser) - I see a valid JSON response returned to the browser.
I believe the issue is with the reverse proxy site not running or responding at this time.