How to add “Access-Control-Allow-Origin” headers to API Response in Ruby

Question

I\'m interviewing for a front-end developer job and have been given a coding test to build a simple front-end interface. I\'ve been given the server, which has been written in

Answer 1

Sinatra is a simple and lightweight web server. The general idea is that you write response routes like this:

get '/api' do
 "Hello world"
end

When you make a HTTP GET request to yoursite.com/api you will get a "Hello world" as response.

Now to add the header you want, this should do the trick:

get '/api' do
  response['Access-Control-Allow-Origin'] = '*'
  "Hello world"
end