Setup proxy server with Express

February 20, 2015

The problem:

I am working on a project using BreweryDB. I was trying to load some data from the API, but they don’t support jsonp. There is a CORS issue if I directly fetch data using Angular:

XMLHttpRequest cannot load No ‘Access-Control-Allow-Origin’ header is present on the requested resource. Origin ’http://localhost:3000’ is therefore not allowed access.

My solution:

I don’t want to expose my API key, so I have to setup an intermediate proxy. The following code illustrates step by step on how to setup a proxy using node/express.

Step 1: Install express and request

npm install express —save npm install request —save

Step 2: Create server.js

var express = require(‘express’); var request = require(‘request’); var app = express();

Step 3: Setup the route (replace API_KEY with your API key)

app.get(‘/api’, function(req, res){ request(’’ + API_KEY, function (error, response, body) { if (!error && response.statusCode === 200) { console.log(body); res.send(body); } }); });

Step 4: Setup the port

app.listen(3000); console.log(‘Server running on port %d’, 3000);

Step 5: Start the server (node server.js)

Open your browser at http://localhost:3000/api, you should be able the get the JSON object and log in your browser console:

“message”:“Request Successful”, “data”:“You have reached the API. For access, check out http:\/\/\/developers”, “status”:“success”

Send me an email if you have any problem ☺

Originally published at on December 27, 2014.

Written by Victor Leung who is a keen traveller to see every country in the world, passionate about cutting edge technologies. Follow me on Twitter