Add CORS headers to an API endpoint.

README.md

Spin up a API proxy on Heroku that adds CORS headers. Make sure you have heroku and git on your computer:

1. Download these files into a directory
2. Change 'some-target.com' to your target domain in index.js
3. $ git init
4. $ git add .
5. $ git commit -m "And away we go..."
6. $ heroku create
7. $ git push heroku master
8. $ heroku ps:scale web=1
9. $ heroku open

If you have trouble with Heroku, consult their node.js getting started guide.

index.js

var http = require('http');
var request = require('request');
http.createServer(function (req, res) {
  request('http://some-target.com' + req.url, function (error, response, body) {
    if (!error && response.statusCode == 200) {
      var headers = response.headers;
      headers['Access-Control-Allow-Origin'] = '*';
      headers['Access-Control-Allow-Methods'] = 'GET,PUT,POST,DELETE,OPTIONS';
      headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization, Content-Length, X-Requested-With';
      res.writeHead(200, headers);
      res.end(body);
    }
    else {
      res.writeHead(500);
      res.end('Something went wrong.');
    }
  });

}).listen(process.env.PORT || 8000);
console.log('Server running at ' + (process.env.PORT || 8000));

package.json

{
  "name": "cors",
  "version": "0.0.0",
  "description": "CORS something",
  "main": "index.js",
  "repository": "",
  "author": "",
  "license": "MIT",
  "dependencies": {
    "request": "~2.21.0"
  },
  "engines": {
    "node": "0.8.x",
    "npm": "1.1.x"
  }
}

Procfile

web: node index.js