Fetch API with Cookie

Question

I am trying out the new Fetch API but is having trouble with Cookies. Specifically, after a successful login, there is a Cookie header in future requests, but Fetch seems to ignore that headers, and all my requests made with Fetch is unauthorized.

Is it because Fetch is still not ready or Fetch does not work with Cookies?

I build my app with Webpack. I also use Fetch in React Native, which does not have the same issue.

Answer 1

Fetch does not use cookie by default. To enable cookie, do this:

fetch(url, {
  credentials: "same-origin"
}).then(...).catch(...);

Answer 2

In addition to @Khanetor's answer, for those who are working with cross-origin requests: credentials: 'include'

Sample JSON fetch request:

fetch(url, {
  method: 'GET',
  credentials: 'include'
})
  .then((response) => response.json())
  .then((json) => {
    console.log('Gotcha');
  }).catch((err) => {
    console.log(err);
});

https://developer.mozilla.org/en-US/docs/Web/API/Request/credentials

Answer 3

Have just solved. Just two f. days of brutforce

For me the secret was in following:

1. I called POST /api/auth and see that cookies were successfully received.

2. Then calling GET /api/users/ with credentials: 'include' and got 401 unauth, because of no cookies were sent with the request.

The KEY is to set credentials: 'include' for the first /api/auth call too.

Answer 4

If you are reading this in 2019, credentials: "same-origin" is the default value.

fetch(url).then