// CloudFront > Functions > Create function
// CloudFront > Functions > FunctionName > Publish
// CloudFront > Functions > FunctionName > Add association (Viewer request)
//
// echo -n 'user:password' | base64
// dXNlcjpwYXNzd29yZA==

function handler(event) {
  var authHeaders = event.request.headers.authorization;
  var expected = "Basic dXNlcjpwYXNzd29yZA==";
  if (authHeaders && authHeaders.value === expected) {
    return event.request;
  }
  var response = {
    statusCode: 401,
    statusDescription: "Unauthorized",
    headers: {
      "www-authenticate": {
        value: 'Basic realm="Enter credentials for this super secure site"',
      },
    },
  };
  return response;
}