Firebase-js-sdk: Response data is missing data field after preflight response

[rafinskipg]

Describe your environment

• Operating System version: ubuntu
• Browser version: chrome
• Firebase SDK version: "firebase": "^5.5.6",
• Firebase Product: functions

Describe the problem

after a preflight response from the firebase function I get this error from the sdk

 Error: Response is missing data field.
    at new HttpsErrorImpl (index.cjs.js:58)
    at Service.<anonymous> (index.cjs.js:504)

I can not call the firebase functions from my app. I don't know how to deal with this pre-flight issue. Maybe there's another way to do it on firebase.

[google-oss-bot]

I found a few problems with this issue:

• I couldn't figure out how to label this issue, so I've labeled it for a human to triage. Hang tight.
• This issue does not seem to follow the issue template. Make sure you provide all the required information.

[pankajparkar]

Any updates on this issue? I'm badly stucked at this.

[mrvnklm]

Same here, any updates?

EDIT:
Actually that issue is gone when I use a object with property data in response of the firebase function:
res.status(200).send({ data: { ... } })

[rafinskipg]

@mrvnklm do you mean that the server must respond with data to the preflight response?

[mrvnklm]

@rafinskipg no, the firebase function response must contain data object. I mean, this could be a real issue but it fixes the problem without any compromises

[rafinskipg]

@mrvnklm , interesting... I stopped using this SDK long ago, because of this problem, but maybe i dare to try again someday. Thanks for your insights

[lneninger]

Firebase documentation requires the json with a data field.

[rommelpe]

@rafinskipg could you confirm if you are still having this issue? If so, would you mind sharing the detailed steps you’ve taken that led to the error message encountered (with a sample reproducible code would be great).

You may also consider upgrading your JS SDK to the latest version.

[google-oss-bot]

Hey @rafinskipg. We need more information to resolve this issue but there hasn't been an update in 7 days. I'm marking the issue as stale and if there are no new updates in the next 3 days I will close it automatically.

If you have more information that will help us get to the bottom of this, just add a comment!

[google-oss-bot]

Since there haven't been any recent updates here, I am going to close this issue.

@rafinskipg if you're still experiencing this problem and want to continue the discussion just leave a comment here and we are happy to re-open this.