Nutzer neu authentifizieren

Bei bestimmten vertraulichen Vorgängen wie dem Löschen eines Kontos, dem Aktualisieren der E-Mail-Adresse eines Nutzers oder dem Ändern eines Passworts muss der Nutzer kürzlich angemeldet gewesen sein. Wenn Sie eine dieser Aktionen ausführen und sich der Nutzer zu lange zuvor angemeldet hat, schlägt die Aktion mit einer Fehlermeldung fehl. Je nach Anwendungsfall kann dies mit reauthenticateWithPopup(), reauthenticateWithRedirect() oder reauthenticateWithCredential() erfolgen.

Beispiel: Re-authentication for Apple Sign-in with Popup

Webversion 9

import { getAuth, reauthenticateWithPopup, OAuthProvider } from "firebase/auth";

// Result from Redirect auth flow.
const auth = getAuth();
const provider = new OAuthProvider('apple.com');

reauthenticateWithPopup(auth.currentUser, provider)
  .then((result) => {
    // User is re-authenticated with fresh tokens minted and can perform
    // sensitive operations like account deletion, or updating their email
    // address or password.

    // The signed-in user info.
    const user = result.user;

    // You can also get the Apple OAuth Access and ID Tokens.
    const credential = OAuthProvider.credentialFromResult(result);
    const accessToken = credential.accessToken;
    const idToken = credential.idToken;

    // ...
  })
  .catch((error) => {
    // Handle Errors here.
    const errorCode = error.code;
    const errorMessage = error.message;
    // The email of the user's account used.
    const email = error.customData.email;
    // The credential that was used.
    const credential = OAuthProvider.credentialFromError(error);

    // ...
  });
auth_apple_reauthenticate_popup.js

Webversion 8

const provider = new firebase.auth.OAuthProvider('apple.com');

firebase
  .auth()
  .currentUser
  .reauthenticateWithPopup(provider)
  .then((result) => {
    // User is re-authenticated with fresh tokens minted and can perform
    // sensitive operations like account deletion, or updating their email
    // address or password.
    /** @type {firebase.auth.OAuthCredential} */
    var credential = result.credential;

    // The signed-in user info.
    var user = result.user;
     // You can also get the Apple OAuth Access and ID Tokens.
    var accessToken = credential.accessToken;
    var idToken = credential.idToken;

    // IdP data available in result.additionalUserInfo.profile.
      // ...
  })
  .catch((error) => {
    // Handle Errors here.
    var errorCode = error.code;
    var errorMessage = error.message;
    // The email of the user's account used.
    var email = error.email;
    // The firebase.auth.AuthCredential type that was used.
    var credential = error.credential;

    // ...
  });
apple.js

Beispiel: reauthenticateWithCredential()

Webversion 9

import { getAuth, reauthenticateWithCredential } from "firebase/auth";

const auth = getAuth();
const user = auth.currentUser;

// TODO(you): prompt the user to re-provide their sign-in credentials
const credential = promptForCredentials();

reauthenticateWithCredential(user, credential).then(() => {
  // User re-authenticated.
}).catch((error) => {
  // An error ocurred
  // ...
});
auth_reauth_with_credential.js

Webversion 8

const user = firebase.auth().currentUser;

// TODO(you): prompt the user to re-provide their sign-in credentials
const credential = promptForCredentials();

user.reauthenticateWithCredential(credential).then(() => {
  // User re-authenticated.
}).catch((error) => {
  // An error occurred
  // ...
});
manage.js