Can't set a cookie using NextJS 9's API Route

Question

Typically it seems that when using Express, in the "res" object there is "cookie" so you can do something like:

res.cookie('session', sessionCookie, options);

In the API routes offered by NextJS in Next 9, when looking at res, this does not exist. Is there a way to set the cookie for a response object in a Next API Route function?

Solution

Adapted from offical repo middleware example, you can set Set-Cookie header via res like so:

import { serialize } from 'cookie';
function (req, res) {
   // ...
   // setHeader(headerName: string, cookies: string | string[])
   // can use array for multiple cookies
   res.setHeader('Set-Cookie', serialize('token', 'token_cookie_value', { path: '/' }));
}

Comments

[Afsanefda]

how about multiple cookies ? is it working to do that multiple time?

[Kevin Law]

@Afsanefda, you can use array in second param like so: res.setHeader('Set-Cookie', [ serialize('foo', 'bar', { path: '/' }), serialize('hello', 'world', { path: '/' }) ]);

[Biskrem Muhammad]

hint, if you are using typescript, you should install type definitions as a dev dependency: npm i -D @types/cookie

[Konrad Grzyb]

You can set also HttpOnly cookie with serialize('token', token, { httpOnly: true }) github.com/jshttp/cookie/blob/master/index.js#L91