Preload session argument is undefined on page load

[gigatoride]

The following code doesn't work properly on page load:

<script context="module">
	export async function preload(page, session) {
                console.log(session) // undefined on page load!
		const res = await this.fetch(`private/needsession`); // user session needed for this get request
		const article = await res.json();
		return { article };
	}
</script>

Sapper version: 0.27.9

I'm trying to make a get request by the user session using preload

Another example with realworld same issue occurs

[thebells1111]

Did you pass the session to sapper.middleware in your server.js file?

session is generated on the server by the session option passed to sapper.middleware

On the server, you can populate session by passing an option to sapper.middleware:

// src/server.js
express() // or Polka, or a similar framework
	.use(
		serve('static'),
		authenticationMiddleware(),
		sapper.middleware({
			session: (req, res) => ({
				user: req.user
			})
		})
	)
	.listen(process.env.PORT);

[gigatoride]

@thebells1111
What I mean is the preload session is already defined on normal navigation. but on page load. sometimes it doesn't,

Some related issues #594 #588

I'm still investigating this.

[pngwn]

Do you have a minimal repro for this?

[gigatoride]

I'm not sure if it is a bug yet. currently unable to reproduce the issue.
as I've been using a beta version of Firefox, maybe a cache issue not sure yet.

I will close this issue for now.