Issues with Access-Control-Allow-Origin about functions-samples HOT 13 CLOSED

I have the same problem. Can someone help?

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cors(req, res, async () => {

passing async function to third parameter of cors does not work because it does not return the promise object.

https://github.com/expressjs/cors/blob/master/lib/index.js#L188

It may cause the problem.

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I also Face the same issue , so till now did any one resolved this issue .?

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It seems there is a 500 error returned. Can you check the Function log (in the Firebase console) to see if there is more info about these 500 errors? in case that helps...

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Hi Frank, This doesn't look like an issue with the firebase-samples repo. Would you mind putting this question on Stack Overflow or reaching out to support? ☼, Kato

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is cors module necessary ?

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hi did you resolve this issue?
I am also having the same issue

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I am having the same issue as well. How did you resolve the problem?

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it was a cors issue.

const cors = require('cors');
const corsOptions = {
origin: '*',
allowedHeaders: ['Content-Type', 'Authorization', 'Content-Length', 'X-Requested-With', 'Accept'],
methods: ['GET', 'PUT', 'POST', 'DELETE', 'OPTIONS'],
optionsSuccessStatus: 200 // some legacy browsers (IE11, various SmartTVs) choke on 204
};

app.use(cors(corsOptions));
app.get('/portfolio', cors(corsOptions), (() => {
// rest of the code here.
}

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I am not sure what you are trying to do but I believe the code I pasted will allow you to call methods on the Express application regardless of what the app/function does (access DB or not).

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I have the same problem. Can someone help?
how to solve this

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hi did you resolve this issue?
I am also having the same issue

hii if your issue resolve please let me know..

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