Uploading a .png image with .putData() creates an octet-stream object instead of a png object in storage emulator

[Wizzel1]

[REQUIRED] Environment info

firebase-tools: 11.9.0

Platform: Windows 10

[REQUIRED] Steps to reproduce

1. Create an app that has access to the emulator.
2. Convert a png image to bytes
3. Upload the data with .putData(data, SettableMetadata(contentType: 'image/png'));
4. Check the result in storage emulator

[REQUIRED] Expected behavior

As in version 11.7.0, I expected to have a image/png object added to the storage emulator.

[REQUIRED] Actual behavior

Instead it adds a application/octet-stream.

[google-oss-bot]

This issue does not seem to follow the issue template. Make sure you provide all the required information.

[tonyjhuang]

what sdk are you using?

[Wizzel1]

I use the flutter SDK https://github.com/firebase/flutterfire/tree/master/packages/firebase_storage

[balazss]

I have a similar issue with 11.8.1 when using uploadBytesResumable with Node client. Only happens with PNGs.

Error is:
error FirebaseError: Firebase Storage: An unknown error occurred, please check the error payload for server response. (storage/unknown)

When checking the type, it says application/octet-stream

[sebschre]

I also have a similar issue with any file that is larger than ~200kB:
FirebaseError: Firebase Storage: An unknown error occurred, please check the error payload for server response. (storage/unknown)
The type is always application/octet-stream and the size is always 262.14 kB

[LanderBeeuwsaert]

We have the same issue when we do upload() via firebase admin to the storage emulator, since updating from 11.9.0 to 11.16.0

[rulamon]

I've been having a similar issue as well in the emulator: when adding a file to the emulator through firebase admin's upload() the type is always application/octet-stream.

[Yuangwang]

Hi, I think the discussion here has been for two separate issues.

1. Some of you are having issues with resumable uploads erroring out and also having the type application/octet-stream (@sebschre, @balazss, and maybe @Wizzel1). I think this was reported before (Storage emulator: unknown error with resumable uploads #4959) and fixed in this pr (Fix firebase storage resumable uploads #5018). Try updating to the latest firebase-tools release and your issue should hopefully be fixed, if not please report back and we can take a closer look!
2. There is another issue that I was able to reproduce where some admin sdks are not setting the file type properly, its always being set to application/octet-stream. The fix for this is a WIP.

@LanderBeeuwsaert and @rulamon I think you are running into this second issue. Which admin sdk are you using?

[LanderBeeuwsaert]

Hi @Yuangwang, I'm running 11.2.0

[Yuangwang]

@LanderBeeuwsaert Sorry I think I was a bit unclear, which one of these from https://firebase.google.com/docs/admin/setup#prerequisites are you using?

[LanderBeeuwsaert]

@Yuangwang ah apologies, the Node.js SDK, package firebase-admin, 11.2.0

[Yuangwang]

Thanks! this will help in debugging

[Yuangwang]

Merged in fix for admin sdk issue #5229 it should be out with the new release. I also followed the steps to reproduce the original bug and it seems to be fixed so I'm closing this for now.