SolidJS•17mo ago

set response header from within `createServerData$()` callback

hi how do I set a response header from within the callback of createServerData$()? useRequest().responseHeaders is undefined (despite typescript saying it's always a Headers object) this evaluates to a different PageEvent that is also missing the responseHeaders property I've tried setting the .responseHeaders property with the headers I want myself on both but neither worked my goal is just to set a cookie when the server data is fetched, that's all I want

5 Replies

Mikle•16mo ago

You can access the request headers and set cookies like this:

createServerData$(
    async (_, { request }) => {
      request.headers.set('cookie', request.headers.get('cookie') || '')
    },
    { key: () => ['auth_user'] },
  )

Samual 🦢OP•16mo ago

what does that achieve? when trying to help people please test your proposed solution okay I figured it out, useRequest().responseHeaders is defined at the beginning of the callback but as soon as the callback awaits something, it becomes undefined but if you save a reference to it to a variable making changes still works even after an await so the lesson is always have useRequest() at the top of a function if you plan on using it

createServerData$(async () => {
    const { responseHeaders } = useRequest()
    const result = await somethingAsync()

    responseHeaders.set("x-foo", "bar")

    return result
})

createServerData$(async () => {
    const { responseHeaders } = useRequest()
    const result = await somethingAsync()

    responseHeaders.set("x-foo", "bar")

    return result
})

that only fixes initial server render though for when the resource is invalidated and the client side router is fetching the data again useRequest().responseHeaders is undefined even at the beginning of the callback

Samual 🦢OP•16mo ago

judging by https://github.com/solidjs/solid-start/blob/043577a6400b8461baa2345e70b665f86da9692f/packages/start/server/server-functions/server.ts#L160 it doesn't look like this is fixable

GitHub

solid-start/packages/start/server/server-functions/server.ts at 043...

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Edivado•16mo ago

leaving this here: https://github.com/solidjs/solid-start/pull/485#issuecomment-1676906831 also @giyomoon created a patch that let's you use responseHeaders in both cases https://github.com/solidjs/solid-start/pull/485#issuecomment-1677699897

Samual 🦢OP•16mo ago

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set response header from within `createServerData$()` callback

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