使用Firebase重新验证 [英] Using Firebase reauthenticate

问题描述

感谢您提供有关如何在Firebase中重新验证用户身份的帮助。我想知道如果说文档没有解释如何使用它，那么是否有必要添加所有这些优秀的功能：

目前，这是我正在尝试的，它不工作。错误无法读取未定义的属性'凭证'

在构造函数中：

 构造函数（@Inject（FirebaseApp）firebaseApp：any）{
 this.auth = firebaseApp.auth（）; 
 console.log（this.auth）; 
 
 
 
 
 
 
然后函数
 
 
  changePassword（passwordData）{
 if（passwordData.valid）{
 console.log（passwordData.value）; 
 //让我们先重新验证，不管
 //用户已经登录了多久！ 
 
 const user = this.auth.currentUser; 
 const credential = this.auth.EmailAuthProvider.credential（user.email，passwordData.value.oldpassword）; 
 console.log（凭证）; 
 this.auth.reauthenticate（credential）
 .then（（_）=> {
 console.log（'User reauthenticated'）; 
 this.auth.updatePassword（ （（_）=> {
 console.log（'Password changed'）; 
））
 .catch（（error） =（$ error）= $ b $ console.log ）; 
}）
} 
} 
  
 
 
解决方案 reauthenticate（）方法在 firebase.User ，不在
  var user = firebase.app.auth（） 。当前用户; 
 var credentials = firebase.auth.EmailAuthProvider.credential（'[e-mail]'，'firebase'）; 
 user.reauthenticate（credentials）; 
  
 
 
 
 
 
 
 更新（2017年7月） strong>： 
 
 
 Firebase Web SDK 4.0版本中有一些重大变化。从发行说明： 
 
 
 
 
 BREAKING： firebase.User.prototype.reauthenticate 已被删除，转而使用  firebase.User.prototype.reauthenticateWithCredential   
 
据我所知， reauthenticateWithCredential 是一个下拉菜单，替换旧的方法。 
I'll appreciate assistance with how to reauthenticate a user in Firebase. I wonder if it makes any sense adding all these great features if the documentation doesn't explain how to use it:

Currently, this is what I'm trying, and it ain't working. Errors as cannot read property 'credential' of undefined

In constructor:
  constructor(@Inject(FirebaseApp) firebaseApp: any) {
    this.auth = firebaseApp.auth();
    console.log(this.auth);
  }
then the function
changePassword(passwordData) {
    if(passwordData.valid) {
      console.log(passwordData.value);
      // let us reauthenticate first irrespective of how long
      // user's been logged in!

      const user = this.auth.currentUser;
      const credential = this.auth.EmailAuthProvider.credential(user.email, passwordData.value.oldpassword);
      console.log(credential);
      this.auth.reauthenticate(credential)
        .then((_) => {
          console.log('User reauthenticated');
          this.auth.updatePassword(passwordData.value.newpassword)
            .then((_) => {
              console.log('Password changed');
            })
            .catch((error) => {
              console.log(error);
            })
        })
        .catch((error) => {
          console.log(error);
        })
    }
  }

解决方案
The reauthenticate() method is called on a firebase.User, not on firebase.auth.Auth itself.
var user = firebase.app.auth().currentUser;
var credentials = firebase.auth.EmailAuthProvider.credential('[e-mail]', 'firebase');
user.reauthenticate(credentials);




Update (July 2017):

There are some breaking change in the 4.0 version of the Firebase Web SDK. From the release notes:

  
BREAKING: firebase.User.prototype.reauthenticate has been removed in favor of firebase.User.prototype.reauthenticateWithCredential.
As far as I can tell the reauthenticateWithCredentialis a drop-in replacement for the old method.

                        
这篇关于使用Firebase重新验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！