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index.js
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index.js
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// [SNIPPET_REGISTRY disabled]
// [SNIPPETS_SEPARATION enabled]
function initialize() {
// [START appcheck_initialize]
const { initializeApp } = require("firebase/app");
const { initializeAppCheck, ReCaptchaV3Provider } = require("firebase/app-check");
const app = initializeApp({
// Your firebase configuration object
});
// Pass your reCAPTCHA v3 site key (public key) to activate(). Make sure this
// key is the counterpart to the secret key you set in the Firebase console.
const appCheck = initializeAppCheck(app, {
provider: new ReCaptchaV3Provider('abcdefghijklmnopqrstuvwxy-1234567890abcd'),
// Optional argument. If true, the SDK automatically refreshes App Check
// tokens as needed.
isTokenAutoRefreshEnabled: true
});
// [END appcheck_initialize]
}
function customProvider() {
// [START appcheck_custom_provider]
const { CustomProvider } = require("firebase/app-check");
const appCheckCustomProvider = new CustomProvider({
getToken: () => {
return new Promise((resolve, _reject) => {
// TODO: Logic to exchange proof of authenticity for an App Check token and
// expiration time.
// [START_EXCLUDE]
const tokenFromServer = "abc1234";
const expirationFromServer = 1234;
// [END_EXCLUDE]
const appCheckToken = {
token: tokenFromServer,
expireTimeMillis: expirationFromServer * 1000
};
resolve(appCheckToken);
});
}
});
// [END appcheck_custom_provider]
return appCheckCustomProvider;
}
function initializeCustomProvider() {
const appCheckCustomProvider = customProvider();
// [START appcheck_initialize_custom_provider]
const { initializeApp } = require("firebase/app");
const { initializeAppCheck } = require("firebase/app-check");
const app = initializeApp({
// Your firebase configuration object
});
const appCheck = initializeAppCheck(app, {
provider: appCheckCustomProvider,
// Optional argument. If true, the SDK automatically refreshes App Check
// tokens as needed.
isTokenAutoRefreshEnabled: true
});
// [END appcheck_initialize_custom_provider]
}
function nonFirebase() {
const { initializeApp } = require("firebase/app");
const app = initializeApp({
// Your firebase configuration object
});
const { ReCaptchaV3Provider } = require('firebase/app-check');
const provider = new ReCaptchaV3Provider('');
// [START appcheck_nonfirebase]
const { initializeAppCheck, getToken } = require('firebase/app-check');
const appCheck = initializeAppCheck(
app,
{ provider: provider } // ReCaptchaV3Provider or CustomProvider
);
const callApiWithAppCheckExample = async () => {
let appCheckTokenResponse;
try {
appCheckTokenResponse = await getToken(appCheck, /* forceRefresh= */ false);
} catch (err) {
// Handle any errors if the token was not retrieved.
return;
}
// Include the App Check token with requests to your server.
const apiResponse = await fetch('https://yourbackend.example.com/yourApiEndpoint', {
headers: {
'X-Firebase-AppCheck': appCheckTokenResponse.token,
}
});
// Handle response from your backend.
};
// [END appcheck_nonfirebase]
}