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Simulating cookie responses

Although Mirage allows setting headers in a response, the XMLHttpRequest spec explicitly forbids access to Set-Cookie and Set-Cookie2 headers. As a result Mirage responses cannot set cookies via headers.

However, you can simulate receiving cookies from an ajax call at the browser level by setting them in a route function handler:

this.post('/users/login', ({ users }) => {
  // log in for 24 hours
  let now = new Date();
  let cookieExpiration = new Date(now.getTime() + (24 * 3600 * 1000));
  document.cookie=`remember_me=cookie-content-here; domain=.dev-domain; path=/; expires=${cookieExpiration.toUTCString()};`;

  return users.find(1);
});

Your Ember client code will now have access to any cookies set using document.cookie.