Getting mime error: content type is [''] with flutter

My flutter app doesn't loads and throws mime error. Apparently cloudflare pages is not detecting my main.dart.js script and returning it as plain text/without the content type header.

I tried:

Disabling cache
Disable proxying for the custom domain
Redeploying
Purging cache
Disabling minify
Deploying through chrome and through firefox

Nothing works, and the issue persist

D5OP•2/7/24, 10:13 AM

Note: flutter doesn't have any kind of SSR, so that's not an issue

D5OP•2/7/24, 4:10 PM

Note 2: Works perfectly on netlify and similar services, only happens with cloudflare pages

D5OP•2/7/24, 4:10 PM

Even proxied through cloudflare

Cyb3r-Jak3•2/7/24, 4:12 PM

Did you direct upload? There’s a weird bug where sometimes the mime type doesn’t get set correctly on direct upload sometimes. If you use wrangler then it should be fine

CCyb3r-Jak3 Did you direct upload? There’s a weird bug where sometimes the mime type doesn’t...

D5OP•2/7/24, 4:13 PM

Yes, I direct uploaded. With both chrome and firefox. Tried too on incognito mode and no luck

DD5 Yes, I direct uploaded. With both chrome and firefox. Tried too on incognito mod...

Cyb3r-Jak3•2/7/24, 4:13 PM

Can you try using wrangler to do the upload and see if that works.

D5OP•2/7/24, 4:14 PM

Yes, will try, one second

CCyb3r-Jak3 Can you try using wrangler to do the upload and see if that works.

D5OP•2/7/24, 4:30 PM

Done. No luck

D5OP•2/7/24, 4:30 PM

Same error is being shown

Cyb3r-Jak3•2/7/24, 4:32 PM

I’d file an issue on the wrangler repo because it seems like the file mimetype isn’t being correctly parsed.

D5OP•2/7/24, 4:32 PM

Shall I create it?

Cyb3r-Jak3•2/7/24, 4:34 PM

Yeah sorry you should file the issue and if you have a minimal recreate then it will help the team debug

D5OP•2/7/24, 4:34 PM

But if the same happens with both manual and wrangler, then I think it's not wrangler specific?

Cyb3r-Jak3•2/7/24, 4:36 PM

I don’t know what the manual upload process does but I suspect it’s parsed similarly to how wrangler does

D5OP•2/7/24, 5:28 PM

Done:
https://github.com/cloudflare/wrangler-action/issues/234

GitHub

Getting mime error [''] · Issue #234 · cloudflare/wrangler-action

When deploying a flutter app, I get mime error for the main.dart.js file. It happens with both the wrangler and manual deployment, in different browsers. I tried disabling cache, redeploying... Not...

D5OP•2/7/24, 5:28 PM

Thanks a lot! @Cyb3r-Jok3

Getting mime error: content type is [''] with flutter

Similar Threads

Similar Threads

Similar Threads