Content-Type is changed to text/html and script tag is inserted

[hankei6km]

I am sending JSON using res.json in Express. In this case Content-Type of res headers should be application/json.
But in Nodebox Runtime it is changed to text/html.

And <script> tag is inserted.

step to reproduce

A sandbox for step to reproduce.
https://codesandbox.io/p/sandbox/reproduce-btoken-json-responce-fohukt

Server part code:
https://codesandbox.io/p/sandbox/reproduce-content-type-is-changed-to-text-html-fohukt?file=%2Fbox-src%2Fvite-project%2Fserver.js%3A1%2C1

Express + Vite server is started inside the Nodebox environment and fetch the JSON from the preview window.
This will result in a parse error.

Start the above server without using Nodebox with npm run server.
This is displayed as expected.

[DeMoorJasper]

It shouldn't change this if encoding is set to anything non-html will check this asap and post any updates here

[DeMoorJasper]

Just checked and this likely indicates that your returned response from the http server is html, unfortunately in this case we can't really fix this

[hankei6km]

@DeMoorJasper

Thanks for the check.

I will consider not using Express res.json in the Nodebox environment.

[brianjenkins94]

Wait, why can't this be fixed? I've run into this too.

@hankei6km is using res.json() which sends application/json. Nodebox is changing it to text/html somehow.

[DeMoorJasper]

Wait, why can't this be fixed? I've run into this too.

@hankei6km is using res.json() which sends application/json. Nodebox is changing it to text/html somehow.

I didn't look too deeply into this but seeing that it is using res.json it's probably something going wrong in nodebox, reopening this ticket

[hankei6km]

@DeMoorJasper

I've already stopped using Express on Nodebox and am using another method. So I can't contribute much.

However, Additional information that may be helpful if you look deeper

This is a forked sandbox from example.

https://codesandbox.io/p/sandbox/reproduce-content-type-markdown-nodebox-drv44h

I added only one line to index.js. Expected response is text/markdown; charset=utf-8

  res.setHeader('content-type', 'text/makdown');

But in Nodebox it is text/html.

Of course, when I run it with native Node.js, it is text/markdown
https://codesandbox.io/p/sandbox/reproduce-content-type-markdown-native-nodejs-w48cz2

Therefore, similar problems may occur outside of res.json function.