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Could not reach Cloud Firestore backend. Connection failed 1 time. this typically indicates that your device does not have healthy Internet

I am connecting javascript & firebase but got this issue,
I am facing this issue I switched networks as well but it doesn't work,
firebase v9
javascript
package file: webpack, webpack-cli
filename: index.js
import { initializeApp } from 'firebase/app';
import {getFirestore, collection, getDocs} from 'firebase/firestore';
const firebaseConfig = {
apiKey: ...,
authDomain: ...,
projectId: ...,
storageBucket: ...,
messagingSenderId: ...,
appId: ...
};
// initialize application
const app = initializeApp(firebaseConfig, {
experimentalForceLongPolling: true,
useFetchStreams: false
});
// initialize serivice
const db = getFirestore();
// collection ref
const colRef = collection(db, 'books');
// get collection data
getDocs(colRef)
.then(snapshot => {
console.log(snapshot.docs)
})
Thanks in advance!

To connect to the firestore applications you need to check that your internet connection is very well,
I encounter that the internet I was working on was not well enough, I changed the connection again and restart the system,
It resolved the issue!

Can't get data from firebase in react chart

I'm using ApexChartJs for my react project, but when I tried to fetch dynamic data from my firebase database, then show me undefined.
here is my part of code from my project:
import React, { useEffect, useState } from "react";
import Chart from "react-apexcharts";
import { auth, db } from "./firebase";
import { useCollection } from "react-firebase-hooks/firestore";
const [dataPoint, setDataPoint] = useState([]);
const query = db.collection("data");
const [snapshot, loading, error] = useCollection(query);
const [series, setSeries] = useState([]);
useEffect(() => {
setSeries([
{
name: "Desktops",
data: snapshot?.docs.map((doc) => doc.data().value),
},
]);
}, [snapshot]);
console.log(series);
data in the firebase look like:
firebase configure file:
import firebase from "firebase";
// For Firebase JS SDK v7.20.0 and later, measurementId is optional
const firebaseConfig = {
apiKey: "AIzaSyC2mfjPdIdXxGgJFqqVviw32xoaEMxxxxxx",
authDomain: "chart-app-4591b.firebaseapp.com",
projectId: "chart-app-4591b",
storageBucket: "chart-app-4591b.appspot.com",
messagingSenderId: "995691438244",
appId: "1:995691438244:web:6d945f72ff51d444664631",
measurementId: "G-2B9ZFG6E33",
};
const app = firebase.initializeApp(firebaseConfig);
const db = app.firestore();
const provider = new firebase.auth.GoogleAuthProvider();
const auth = firebase.auth;
export { db, provider, auth };

If your firebase app is well set-up and configured appropriately, the main issue that may lead an undefined query result is that the result are still being loaded.
To overcome this, you should update your series state whenever the loading property changes (along with query result snapshot changes):
const query = db.collection("data");
const [snapshot, loading, error] = useCollection(query);
useEffect(() => {
setSeries([
{
name: "Desktops",
data: snapshot?.docs.map((doc) => doc.data().value),
},
]);
}, [loading, snapshot]);
You should provide alternative error handling as well for state update.
Update (per the permission error)
A common error source would be the lack of privileges to read and write from the configured Firestore DB highlighted by below error message:
FirebaseError: Missing or insufficient permissions
To allow all reads and writes for test only mode (should never be the case for a production system), you can set below Security Rules for the database:
// Allow read/write access to all users under any conditions
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write: if true;
}
}
}
You can read more on Cloud Firestore Security Rules in the official documentation.

Even if the user is logged in, I get an error

I have a problem:
I want a logged in user to be able to use my getRealtimeUsers function. But I get the following error: FirebaseError: Missing or insufficient permissions.
Below you will find the code. Some explanations:
On the React side, I created a firebase, registered a getRealtimeUsers function there, and tried to use it.
firebase.js file
import firebase from "firebase/app";
import "firebase/firestore";
const firebaseConfig = {
apiKey: process.env.REACT_APP_FIREBASE_KEY,
authDomain: process.env.REACT_APP_FIREBASE_DOMAIN,
projectId: process.env.REACT_APP_FIREBASE_PROJECT_ID,
storageBucket: process.env.REACT_APP_FIREBASE_STORAGE_BUCKET,
messagingSenderId: process.env.REACT_APP_FIREBASE_SENDER_ID,
appId: process.env.REACT_APP_FIREBASE_APP_ID,
measurementId: process.env.REACT_APP_FIREBASE_MEASUREMENT_ID
};
firebase.initializeApp(firebaseConfig);
export default firebase;
A function that uses the firebase I created:
import firebase from '../../firebase';
export const getRealtimeUsers = () => {
return async () => {
const db = firebase.firestore();
const unsubscribe = db.collection("users")
return unsubscribe;
}
}
Testing of the function
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { getRealtimeUsers } from '../redux/actions/chatActions';
import firebase from '../firebase';
let unsubscribe;
class chat extends Component {
componentDidMount() {
unsubscribe = this.props.getRealtimeUsers()
.then(unsubscribe => {
return unsubscribe;
}).catch(error => {
console.log(error);
});
}
componentWillUnmount() {
return () => {
unsubscribe.then(f => f()).catch(error => console.log(error));
}
}
render() {
const ref = firebase.firestore().collection("users");
return (
<div>
check if works
</div>
);
}
}
const mapStateToProps = (state) => ({
});
export default connect(
mapStateToProps,
{
getRealtimeUsers
}
);
Here I let the user do the login
login.js action
export const loginUser = (userData) => (dispatch) => {
axios
.post('/login', userData)
.then((res) => {
console.log(res)
setAuthorizationHeader(res.data.token);
})
.catch((err) => {
console.log(err)
});
};
The login is done on the nodejs side, which is also where I set it to firebase:
const config = {
apiKey: "WqcVU",
authDomain: "c468.firebaseapp.com",
projectId: "c468",
storageBucket: "c468.appspot.com",
messagingSenderId: "087",
appId: "1:087:web:c912",
measurementId: "G-SQX1"
};
;
const firebase = require("firebase");
firebase.initializeApp(config);
// Log user in
exports.login = (req, res) => {
const user = {
email: req.body.email,
password: req.body.password,
};
firebase
.auth()
.signInWithEmailAndPassword(user.email, user.password)
.then((data) => {
console.log(JSON.stringify(data));
return data.user.getIdToken();
})
.catch((err) => {
console.error(err);
});
};
app.post('/login', login);
the rules
rules_version = '2';
service cloud.firestore {
match /databases/{database}/documents {
match /{document=**} {
allow read, write: if request.auth != null;
}
}
}
I want only a logged in user to use the getRealtimeUsers function, but even if the user is logged in it doesnt work. That's my problem.
I do not know at all how to solve it

Your case is really problematic, the only way to do security in rules is to access your correntUser or auth. Because you connect through the nodejs, you only return json object and there will be no access to these objects.
For you to have access to these objects what you need to do is connect once more, in react itself, with the same firebase and that's how you enjoy all the worlds that firebase has to offer.
When you log in again, the user does not need to know about it, since when you log in you will reset the password, and choose a random password, it will solve all your problems.
I think this is the most likely solution, but it is not for production
Please update me.

Is there a reason why you're not authenticating directly from the client? The thing is you have to pass in some way the authenticated state from the server to the front...
You have signed in with firebase on your server but you did not sign in with firebase on the front end. Or maybe you did in setAuthorizationHeader(res.data.token); but I'd be curious to know how you did that. It would have been interesting to be able to authenticate with nodejs and then send the tokenId which has been generated, that is data.user.getIdToken(), to the client which the client would then pass to firebase.auth().signInWithToken(token) but this is not possible. If you want to know more about it, I invite you to read this issue (a feature request).
The way to solve this problem is to use Admin SDK and create a custom token.
Firebase gives you complete control over authentication by allowing you to authenticate users or devices using secure JSON Web Tokens (JWTs). You generate these tokens on your server, pass them back to a client device, and then use them to authenticate via the signInWithCustomToken() method.
To achieve this, you must create a server endpoint that accepts sign-in credentials—such as a username and password—and, if the credentials are valid, returns a custom JWT. The custom JWT returned from your server can then be used by a client device to authenticate with Firebase (iOS, Android, web). Once authenticated, this identity will be used when accessing other Firebase services, such as the Firebase Realtime Database and Cloud Storage. Furthermore, the contents of the JWT will be available in the auth object in your Realtime Database Rules and the request.auth object in your Cloud Storage Security Rules.
Here are the steps:
First, you will add the SDK to your server:
yarn add firebase-admin --save
and import it
const admin = require("firebase-admin")
Go over to your Project settings under the "Service accounts" tab.
and click on "Generate a new private key"
a file has been downloaded and saved on your machine. From there, you will either import the file and initialize admin like this:
var serviceAccount = require("/path/to/serviceAccountKey.json");
admin.initializeApp({
credential: admin.credential.cert(serviceAccount)
});
or better yet, in the console
export GOOGLE_APPLICATION_CREDENTIALS="/path/to/serviceAccountKey.json"
and in your file
const credential = admin.credential.applicationDefault() // this will automatically find your env variable
admin.initializeApp({
credential
})
Note: don't forget to set the proper permissions to the private key file with chmod (I had to).
nodejs
firebase
.auth()
.signInWithEmailAndPassword(user.email, user.password)
.then((data) => {
admin
.auth()
.createCustomToken(data.user.uid)
.then((customToken) => {
console.log('customToken', customToken)
// send token back to client here
res.send(customToken)
})
.catch((error) => {
console.log('Error creating custom token:', error);
});
})
.catch((err) => {
console.error(err);
});
and then on the client:
// get the token and then
firebase.auth().signInWithCustomToken(token)
.then((userCredential) => {
// Signed in
var user = userCredential.user;
})
.catch((error) => {
var errorCode = error.code;
var errorMessage = error.message;
});
Another solution would be not using firebase on the client at all and use the backend as some sort of proxy between firebase and the client. The client would make a request to the backend which in turn would interrogate firebase.

in my case, faced same problem with rule's.
please give a try, change your rue and check whether its working or not

How to connect an expo app to google firestore?

I am trying to authenticate a user and also organize the users in my database by their uid and then have the data field be by email. The users are successfully being authenticated however nothing appears in my firestore database.
My firestore security rules are in test mode so there should be no issue with permissions. In my action dispatch, I am successfully getting the user from firebase with their uid, access token, and everything else. I believe the error must be some way I am trying to connect to the firestore.
In my app.js file I initialize firebase like this-
import firebase from 'firebase';
import '#firebase/firestore';
componentDidMount() {
const firebaseConfig = {
apiKey: 'xxxxxxxx',
authDomain: 'xxxxxxxxx.firebaseapp.com',
databaseURL: 'xxxxxxxx.firebaseio.com',
projectId: 'xxxxxxxx',
storageBucket: 'xxxxxxx.appspot.com',
messagingSenderId: 'xxxxxxxxxxx',
appId: 'xxxxxxxxxxxxxxxxxxxx'
};
firebase.initializeApp(firebaseConfig);
}
Then this is how I am trying to make the call to put the user into the database-
firebase.auth().createUserWithEmailAndPassword(email, password)
.then((user) =>
dispatch({ type: USER_LOGIN_SUCCESS, payload: user });
const dbRoot = firebase.firestore();
dbRoot.collection('users').doc(user.user.uid).set({ email });
});
Also at the top of that file, I am importing as follows
import firebase from 'firebase';
import '#firebase/firestore';
Again, these users are being successfully authenticated but they are not appearing in the firestore database.

You have to add a collection to the database and add data.
const dbRoot = firebase.firestore().collection('users');
...
addData() {
dbRoot.add({
user: user.user.uid,
email : email,
complete: true,
});
OR
const dbRoot = firebase.firestore().collection('users');
...
const defaultDoc = {
email: email
};
async addData() {
await dbRoot.doc(user.user.uid).set(defaultDoc);
}

How to enable offline data in firestore for web

I want to enable offline data in my project.
I found the right code for this but I don't know where to implement the code
I implement the code inside the firebaseConfig.js file:
import firebase from 'firebase'
import 'firebase/firestore'
// firebase init
// init code goes here
var config = {
apiKey: '',
authDomain: '',
databaseURL: '',
projectId: '',
storageBucket: '',
messagingSenderId: ''
}
firebase.initializeApp(config)
firebase.firestore().enablePersistence()
.then(function () {
// Initialize Cloud Firestore through firebase
var db = firebase.firestore();
})
.catch(function (err) {
console.log(err)
})
// firebase utils
const db = firebase.firestore()
const oldRealTimeDb = firebase.database()
const auth = firebase.auth()
const currentUser = auth.currentUser
// date issue fix according to firebase
const settings = {
timestampsInSnapshots: true
}
db.settings(settings)
// firebase collections
const usersCollection = db.collection('users')
const postsCollection = db.collection('posts')
export {
db,
auth,
currentUser,
postsCollection,
usersCollection
}
main.js
import Vue from 'vue'
import App from './App.vue'
import router from './router'
import {store} from './store'
import './registerServiceWorker'
import Vuetify from 'vuetify'
import 'vuetify/dist/vuetify.min.css' // Ensure you are using css-loader
const fb = require('./firebaseConfig.js')
Vue.config.productionTip = false
export const bus = new Vue()
Vue.use(Vuetify)
let app
fb.auth.onAuthStateChanged(user => {
if (!app) {
app = new Vue({
el: '#app',
store,
router,
template: '<App/>',
components: {
App
},
render: h => h(App)
}).$mount('#app')
}
})
I got this error:

The sample code provided in the documentation suggests that you should call enablePersistence() and possibly make note if it fails for some given reason:
firebase.initializeApp({
apiKey: '### FIREBASE API KEY ###',
authDomain: '### FIREBASE AUTH DOMAIN ###',
projectId: '### CLOUD FIRESTORE PROJECT ID ###',
});
firebase.firestore().enablePersistence()
.catch(function(err) {
if (err.code == 'failed-precondition') {
// Multiple tabs open, persistence can only be enabled
// in one tab at a a time.
// ...
} else if (err.code == 'unimplemented') {
// The current browser does not support all of the
// features required to enable persistence
// ...
}
});
Subsequent queries after calling enablePersistence() will be internally queued until it fully completes, which means that the query may or may not be using locally cached data, depending on the result of enablePersistence(). If it's important to your app to be able to use local persistence, you may wish to wait on its result (triggering on the returned promise) before performing the query.

Just remove the second firebase.firestore() and call the enablePersistence as follows:
import firebase from 'firebase'
import 'firebase/firestore'
// firebase init
// init code goes here
var config = {
apiKey: '',
authDomain: '',
databaseURL: '',
projectId: '',
storageBucket: '',
messagingSenderId: ''
}
firebase.initializeApp(config)
const db = firebase.firestore();
const auth = firebase.auth();
const currentUser = auth.currentUser;
// date issue fix according to firebase
const settings = {
timestampsInSnapshots: true
};
db.settings(settings);
db.enablePersistence();
// firebase utils
//const db = firebase.firestore() // <---- Remove this line
const oldRealTimeDb = firebase.database()
const auth = firebase.auth()
const currentUser = auth.currentUser