Limitation on set-cookie in responseHeaders

[AlbertSabate]

Describe the bug
There is a limitation when setting cookies header (set-cookie) in the responseHeader.
You cannot set more than one cookie (in an elegant way)

To Reproduce
const responseHeaders = new Header();
responseHeaders.append('set-cookie', 'cookie1...');
responseHeaders.append('set-cookie', 'cookie2...');

return responseHeaders.toJSON();

Only one cookie will be set

Expected behavior
Be able to set multiple cookie in one responseHeader.

[AlbertSabate]

As a workaround, if you need to set more than 1 cookie in one responseHeader you can do it. Because JS is an awesome technology you can currently do this:

return {
      'set-cookie': cookie[0],
      'Set-Cookie': cookie[1],
      'sEt-Cookie': cookies[2],
    };

This works, but of course is not elegant. We should support the format 'set-cookies': [cookie[0],cookie[1]], which currently is not supported.

[aralroca]

@AlbertSabate What version of Bun do you have? With Bun 1.2.2:

const h = new Headers();

h.append('set-cookies', 'cookie1');
h.append('set-cookies', 'cookie2');

console.log(h.toJSON())

The log is:

{
  "set-cookies": "cookie1, cookie2",
}

And, if you have an array of cookies, probably you can use .join?