Cannot read property 'split' of undefined - Netlify adapter

[Bradley-H]

Describe the bug

When I upload my project I keep getting cannot read property of "split".

I suspect this has something to do with the adapter and not of Svelte itself since I can run a dev server just fine.

For whatever it might be worth, here is my project in question - https://github.com/Bradley-H/portfolio

Reproduction

upload to netlify

Logs

No response

System Info

It uploads to netlify just fine, no problem

Severity

blocking an upgrade

Additional Information

No response

here is my website on netlify if you need it - https://bradley-portfolio.netlify.app/

[0xPiyush]

Hello, I am facing the same issue, I tried deploying my Sveltekit app on netlify, on visiting the app,
https://sveltekit-pokedex.netlify.app/
it shows:
Cannot read property 'split' of undefined

Here's the netlify function logs:

4:12:50 PM: a210dba2 ERROR  TypeError: Cannot read property 'split' of undefined
    at parse_body (/var/task/index.js:2082:57)
    at respond (/var/task/index.js:2171:15)
    at render (/var/task/index.js:2495:10)
    at Runtime.handler (/var/task/index.js:2722:26)
    at Runtime.handleOnce (/var/runtime/Runtime.js:66:25)

The build succeeds and the website gets deployed but shows the above error, when testing locally using npm run build / npm run preview, the site works as intended, but shows the above error when deployed.
If you want to see the web app's code here it is:
https://github.com/0xPiyush/sveltekit-pokedex

using svelte netlify adapter. https://www.npmjs.com/package/@sveltejs/adapter-netlify

node: v14.17.2
Dev Dependencies:

"@sveltejs/adapter-netlify": "^1.0.0-next.22",
"@sveltejs/kit": "next",
"autoprefixer": "^10.3.1",
"svelte": "^3.34.0",
"tailwindcss": "^2.2.4"

netlify.toml file:

[build]
    command = "npm run build"
    publish = "build/"
    functions = "functions/"
[build.environment]
    NODE_VERSION = "14.17.2"

[JeanJPNM]

By looking at the stacktraces it looks like the content-type header is undefined making it throw an error here

[0xPiyush]

@JeanJPNM but this only occurs on the deployed version and not when running/hosting locally.

[JeanJPNM]

Can you show me the request data (headers, uri, etc)?

[JeanJPNM]

Ok, so the whole website doesn't work

[JeanJPNM]

Not only the main page responds with a 500 status, all the requests do

[0xPiyush]

Ok, so the whole website doesn't work

yes, none of the routes work on the deployed but if you clone the repo and run it locally, everything runs perfectly

[seenickcode]

@Bradley-H , @0xPiyush I'm getting the same issue as well (with Node v16.5.0). Have you both considered additionally posting the issue on one of Netlify's Github Issue trackers?

[0xPiyush]

@seenickcode I created a post in the netlify support forum and they said that they've seen numerous issues on this forum with Sveltekit, though this is the first of this nature, and asked me to add to this issue. I haven't created an issue on Netlify's issue trackers yet.

[benmccann]

Don't post on Netlify's Github. This is our issue

kit/packages/kit/src/runtime/server/parse_body/index.js

Line 10 in 53e9285

const [type, ...directives] = headers['content-type'].split(/;\s*/);

[benmccann]

I just moved that line of code: #1916

Can y'all try @sveltejs/kit@1.0.0-next.131 and see if it works any better?

[0xPiyush]

Thank you @benmccann #1916 fixed this issue.

[rchrdnsh]

I’m getting this error as well. I did some sleuthing by publishing previous deploys until the problem went away and then comparing netlify-adapter releases…I went back to version 1.0.0-next-20 and the issue went away for me…so I’m assuming maybe something was broken in next-21? Dunno if this is helpful or not.

[JeanJPNM]

Are you using the most recent version of @sveltejs/kit?

[rchrdnsh]

kit: 131
netlify-adapter: 20

I just read Ben’s comment saying to try 131 with the latest adapter…I’ll try that next…

[rchrdnsh]

yes!

I updated to the latest of both kit and the netlify adaptor and the problem has indeed gone away for me...thank you @benmccann XD

[vojtechsedlak]

Running into this issue again with kit: 286 and netlify-adapter: 47. The build compiles and previews fine locally, but on Netlify results in the cannot read property 'split' of undefined error despite no errors getting thrown in the deployment. Any thoughts?