创建用户
如需在 Firebase 项目中创建新用户,您可以调用 createUserWithEmailAndPassword
方法,或让用户通过 Google 登录服务或 Facebook 登录服务等联合身份提供方服务完成首次登录。
您还可以前往 Firebase 控制台的“Authentication”部分,在“用户”页面中创建以密码验证身份的新用户,或者使用 Admin SDK 创建此类新用户。
获取当前登录的用户
如需获取当前用户,建议在 Auth 对象上设置一个观测器 (observer):
Web
import { getAuth, onAuthStateChanged } from "firebase/auth"; const auth = getAuth(); onAuthStateChanged(auth, (user) => { if (user) { // User is signed in, see docs for a list of available properties // https://firebase.google.com/docs/reference/js/auth.user const uid = user.uid; // ... } else { // User is signed out // ... } });
Web
firebase.auth().onAuthStateChanged((user) => { if (user) { // User is signed in, see docs for a list of available properties // https://firebase.google.com/docs/reference/js/v8/firebase.User var uid = user.uid; // ... } else { // User is signed out // ... } });
使用观测器可确保在您获取当前用户时,Auth 对象不会处于中间状态(例如初始化)。当您使用 signInWithRedirect
时,onAuthStateChanged
观测器会等到 getRedirectResult
解析后再触发。
您还可以使用 currentUser
属性来获取当前登录的用户。如果用户并未登录,则 currentUser
为 null:
Web
import { getAuth } from "firebase/auth"; const auth = getAuth(); const user = auth.currentUser; if (user) { // User is signed in, see docs for a list of available properties // https://firebase.google.com/docs/reference/js/auth.user // ... } else { // No user is signed in. }
Web
const user = firebase.auth().currentUser; if (user) { // User is signed in, see docs for a list of available properties // https://firebase.google.com/docs/reference/js/v8/firebase.User // ... } else { // No user is signed in. }
获取用户个人资料
如需获取用户的个人资料信息,请使用 User
实例的属性。例如:
Web
import { getAuth } from "firebase/auth"; const auth = getAuth(); const user = auth.currentUser; if (user !== null) { // The user object has basic properties such as display name, email, etc. const displayName = user.displayName; const email = user.email; const photoURL = user.photoURL; const emailVerified = user.emailVerified; // The user's ID, unique to the Firebase project. Do NOT use // this value to authenticate with your backend server, if // you have one. Use User.getToken() instead. const uid = user.uid; }
Web
const user = firebase.auth().currentUser; if (user !== null) { // The user object has basic properties such as display name, email, etc. const displayName = user.displayName; const email = user.email; const photoURL = user.photoURL; const emailVerified = user.emailVerified; // The user's ID, unique to the Firebase project. Do NOT use // this value to authenticate with your backend server, if // you have one. Use User.getIdToken() instead. const uid = user.uid; }
获取用户的特定提供方个人资料信息
如需获取从用户已关联的登录服务提供方检索到的个人资料信息,可使用 providerData
属性。例如:
Web
import { getAuth } from "firebase/auth"; const auth = getAuth(); const user = auth.currentUser; if (user !== null) { user.providerData.forEach((profile) => { console.log("Sign-in provider: " + profile.providerId); console.log(" Provider-specific UID: " + profile.uid); console.log(" Name: " + profile.displayName); console.log(" Email: " + profile.email); console.log(" Photo URL: " + profile.photoURL); }); }
Web
const user = firebase.auth().currentUser; if (user !== null) { user.providerData.forEach((profile) => { console.log("Sign-in provider: " + profile.providerId); console.log(" Provider-specific UID: " + profile.uid); console.log(" Name: " + profile.displayName); console.log(" Email: " + profile.email); console.log(" Photo URL: " + profile.photoURL); }); }
更新用户个人资料
您可以使用 updateProfile
方法来更新用户的基本个人资料信息,即用户的显示名称和个人资料照片网址。例如:
Web
import { getAuth, updateProfile } from "firebase/auth"; const auth = getAuth(); updateProfile(auth.currentUser, { displayName: "Jane Q. User", photoURL: "https://example.com/jane-q-user/profile.jpg" }).then(() => { // Profile updated! // ... }).catch((error) => { // An error occurred // ... });
Web
const user = firebase.auth().currentUser; user.updateProfile({ displayName: "Jane Q. User", photoURL: "https://example.com/jane-q-user/profile.jpg" }).then(() => { // Update successful // ... }).catch((error) => { // An error occurred // ... });
设置用户电子邮件地址
您可以使用 updateEmail
方法设置用户的电子邮件地址。例如:
Web
import { getAuth, updateEmail } from "firebase/auth"; const auth = getAuth(); updateEmail(auth.currentUser, "user@example.com").then(() => { // Email updated! // ... }).catch((error) => { // An error occurred // ... });
Web
const user = firebase.auth().currentUser; user.updateEmail("user@example.com").then(() => { // Update successful // ... }).catch((error) => { // An error occurred // ... });
向用户发送验证电子邮件
您可以使用 sendEmailVerification
方法向用户发送地址验证电子邮件。例如:
Web
import { getAuth, sendEmailVerification } from "firebase/auth"; const auth = getAuth(); sendEmailVerification(auth.currentUser) .then(() => { // Email verification sent! // ... });
Web
firebase.auth().currentUser.sendEmailVerification() .then(() => { // Email verification sent! // ... });
您可以在 Firebase 控制台的“Authentication”部分的“电子邮件模板”页面中自定义使用的电子邮件模板。请参阅 Firebase 帮助中心内的电子邮件模板。
在发送验证电子邮件时,还可以通过一个接续网址传递状态以重定向回应用。
此外,在发送验证电子邮件之前,您可以通过更新 Auth 实例中的语言代码来对该电子邮件进行本地化。例如:
Web
import { getAuth } from "firebase/auth"; const auth = getAuth(); auth.languageCode = 'it'; // To apply the default browser preference instead of explicitly setting it. // auth.useDeviceLanguage();
Web
firebase.auth().languageCode = 'it'; // To apply the default browser preference instead of explicitly setting it. // firebase.auth().useDeviceLanguage();
设置用户密码
您可以使用 updatePassword
方法设置用户密码。例如:
Web
import { getAuth, updatePassword } from "firebase/auth"; const auth = getAuth(); const user = auth.currentUser; const newPassword = getASecureRandomPassword(); updatePassword(user, newPassword).then(() => { // Update successful. }).catch((error) => { // An error ocurred // ... });
Web
const user = firebase.auth().currentUser; const newPassword = getASecureRandomPassword(); user.updatePassword(newPassword).then(() => { // Update successful. }).catch((error) => { // An error ocurred // ... });
发送重设密码电子邮件
您可以使用 sendPasswordResetEmail
方法向用户发送重设密码电子邮件。例如:
Web
import { getAuth, sendPasswordResetEmail } from "firebase/auth"; const auth = getAuth(); sendPasswordResetEmail(auth, email) .then(() => { // Password reset email sent! // .. }) .catch((error) => { const errorCode = error.code; const errorMessage = error.message; // .. });
Web
firebase.auth().sendPasswordResetEmail(email) .then(() => { // Password reset email sent! // .. }) .catch((error) => { var errorCode = error.code; var errorMessage = error.message; // .. });
您可以在 Firebase 控制台的“Authentication”部分的“电子邮件模板”页面中自定义使用的电子邮件模板。请参阅 Firebase 帮助中心内的电子邮件模板。
在发送重设密码电子邮件时,还可以通过一个接续网址传递状态以重定向回应用。
此外,在发送重设密码电子邮件之前,您可以通过更新 Auth 实例中的语言代码来对该电子邮件进行本地化。例如:
Web
import { getAuth } from "firebase/auth"; const auth = getAuth(); auth.languageCode = 'it'; // To apply the default browser preference instead of explicitly setting it. // auth.useDeviceLanguage();
Web
firebase.auth().languageCode = 'it'; // To apply the default browser preference instead of explicitly setting it. // firebase.auth().useDeviceLanguage();
您也可以从 Firebase 控制台发送重设密码电子邮件。
删除用户
您可以使用 delete
方法删除用户账号。例如:
Web
import { getAuth, deleteUser } from "firebase/auth"; const auth = getAuth(); const user = auth.currentUser; deleteUser(user).then(() => { // User deleted. }).catch((error) => { // An error ocurred // ... });
Web
const user = firebase.auth().currentUser; user.delete().then(() => { // User deleted. }).catch((error) => { // An error ocurred // ... });
您还可以前往 Firebase 控制台的“Authentication”部分,在“用户”页面中删除用户。
重新对用户进行身份验证
某些涉及安全的敏感操作(例如删除账号、设置主电子邮件地址和更改密码)只能针对最近登录过的用户执行。如果对长时间没有登录的用户执行这类操作,操作将失败并显示错误。发生这种情况时,请向用户索取新的登录凭据并将这些凭据传递给 reauthenticateWithCredential
,以便重新对该用户进行身份验证。例如:
Web
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 // ... });
Web
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 // ... });
导入用户账号
您可以使用 Firebase CLI 的 auth:import
命令,将用户账号从文件导入 Firebase 项目中。例如:
firebase auth:import users.json --hash-algo=scrypt --rounds=8 --mem-cost=14