Cloudflare Developers•2mo ago

ReferenceError: XMLHttpRequest is not defined on api endpoint

I'm deploying a NextJS project using next on pages. I'm getting a "ReferenceError: XMLHttpRequest is not defined" when trying to run the code block below. It sounds like the worker behind the pages is trying to use XMLHttpRequest instead of the normal fetch? How do i fix this?

async function getSpotifyTokens(
    clientId: string,
    clientSecret: string,
) {
    const tokenUrl = 'https://accounts.spotify.com/api/token'
    const authStr = `${clientId}:${clientSecret}`
    const b64AuthStr = Buffer.from(authStr).toString('base64')

    const headers = {
        Authorization: `Basic ${b64AuthStr}`,
        'Content-Type': 'application/x-www-form-urlencoded',
    }
    // const body = new URLSearchParams({
    //     grant_type: 'client_credentials',
    // })
    const body = 'grant_type=client_credentials'

    const response = await fetch(tokenUrl, {
        method: 'POST',
        headers,
        body,
    })

    if (!response.ok) {
        const errorText = await response.text()
        throw new Error(`Failed to get token: ${response.status} - ${errorText}`)
    }

    const tokens = (await response.json()) as ExtendedGetRefreshedAccessTokenResponse
    return tokens
}

async function getSpotifyTokens(
    clientId: string,
    clientSecret: string,
) {
    const tokenUrl = 'https://accounts.spotify.com/api/token'
    const authStr = `${clientId}:${clientSecret}`
    const b64AuthStr = Buffer.from(authStr).toString('base64')

    const headers = {
        Authorization: `Basic ${b64AuthStr}`,
        'Content-Type': 'application/x-www-form-urlencoded',
    }
    // const body = new URLSearchParams({
    //     grant_type: 'client_credentials',
    // })
    const body = 'grant_type=client_credentials'

    const response = await fetch(tokenUrl, {
        method: 'POST',
        headers,
        body,
    })

    if (!response.ok) {
        const errorText = await response.text()
        throw new Error(`Failed to get token: ${response.status} - ${errorText}`)
    }

    const tokens = (await response.json()) as ExtendedGetRefreshedAccessTokenResponse
    return tokens
}

here's the dev branch of my site: https://dev.cf-next-cpa.pages.dev/ The endpoint in question is this: https://dev.cf-next-cpa.pages.dev/api/spotify_auth/refresh_tokens ----- The funny thing about this though is that my code has been running perfectly fine before this (for like 400+ commits/deploys) then all of a sudden it stopped working now. I'm also using supabase but it doesn't seem to be the issue since the error only occurs exactly at the fetch call. Did something change with CF workers? The code works just fine locally btw ,also i use the pages dir instead of the app dir.

8 Replies

j3llyb3ans•2mo ago

this is my prod url btw: https://jamstart.app/ been doing some debugging and it seems like the issue really is with the endpoint, but I'm not sure exactly why, I've also checked that I don't use XMLHttpRequest anywhere in my code I've checked that supabase does return valid tokens and tried those tokens manually with the spotify API ---- update/edit: I just checked again, and apparently the problem happens for all of the endpoints, not just the endpoint i mentioned above. It's a bit weird though that sometimes the endpoints would work, sometimes they won't (for example, try searching for songs using the search bar). When doing this (calling the api endpoints), sometimes the endpoint/worker would throw an error (the XMLHttpError thing), sometimes it won't. See images below.

j3llyb3ans•2mo ago

j3llyb3ans•2mo ago

anyone else experience anything similar to this? I tried deploying it to vercel just to check, and the same code worked I'd still like to use CF Pages though if possible the weird thing is that it seems like the problem only happens when the requests are coming from the browser. If it's through curl/postman, it works just fine, and i'm not sure why

ikuwow•2mo ago

@j3llyb3ans hi, I'm facing a similar issue in my preview environment. Have your problem been solved? My project do not use XMLHttpRequest of course, and code is not changed. I'm contacting the support. Error:

ReferenceError: XMLHttpRequest is not defined
Error: Your `getServerSideProps` function did not return an object. Did you forget to add a `return`?"

ReferenceError: XMLHttpRequest is not defined
Error: Your `getServerSideProps` function did not return an object. Did you forget to add a `return`?"

j3llyb3ans•2mo ago

Nope, spent about a week trying to solve it unfortunately but I moved to vercel for now Seeing your error however, I'm now wondering if it might be an error related to gSSP, maybe we would try removing gssp and see how it goes thanks for pinging me btw, I hope this works Oh also, I wonder if moving to the app dir would solve this issue, it would take a while for me to try this out since my app is pretty big lmk how it goes

ikuwow•2mo ago

Thank you for your response, I'll think about it a bit.

yuripave•4w ago

Got the same issue after upgrade to next-on-pages 1.13.2 which introduce a global scope change on globalThis, revert to 1.12.1 solve the issue

borsss•12h ago

also had same issue on 1.13.2, and the downgrade fixed it for me

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ReferenceError: XMLHttpRequest is not defined on api endpoint