@firebase/database：用户回调抛出异常。 TypeError：无法读取未定义的属性“myID”

Question

一旦我将我的应用程序构建到 Firebase 托管中进行生产，一些用户会收到此错误：

@firebase/database：FIREBASE 警告：用户抛出异常 打回来。 TypeError：无法读取未定义的属性“myID”

截图

在我的代码中在任何地方都没有变量“myID”。在开发中一切正常，但一旦构建并投入生产，某些用户就会出现错误。

这是我的 packages.json 版本：

"dependencies": {
"@angular-devkit/core": "0.0.29",
"@angular-devkit/schematics": "^0.6.0",
"@angular/animations": "^5.2.10",
"@angular/cli": "^1.7.4",
"@angular/common": "^5.2.10",
"@angular/compiler": "^5.2.10",
"@angular/core": "^5.2.10",
"@angular/forms": "^5.2.10",
"@angular/http": "^5.2.10",
"@angular/platform-browser": "^5.2.10",
"@angular/platform-browser-dynamic": "^5.2.10",
"@angular/router": "^5.2.10",
"@ng-bootstrap/ng-bootstrap": "^1.1.2",
"@schematics/package-update": "^0.6.0",
"ajv": "^6.0.0",
"angular2-recaptcha": "^0.6.0",
"angularfire2": "^5.0.0-rc.7",
"bootstrap": "^4.1.0",
"core-js": "^2.5.5",
"firebase": "^4.13.1",
"firebase-admin": "^5.10.0",
"firebase-functions": "^0.8.2",
"ng2-validation": "^4.2.0",
"rxjs": "^5.5.10",
"zone.js": "^0.8.26"
 },
"devDependencies": {
"@angular/compiler-cli": "^5.2.10",
"@angular/language-service": "^5.2.10",
"@types/jasmine": "~2.5.53",
"@types/jasminewd2": "~2.0.2",
"@types/node": "^6.0.106",
"codelyzer": "^4.3.0",
"jasmine-core": "~2.6.2",
"jasmine-spec-reporter": "~4.1.0",
"karma": "~1.7.0",
"karma-chrome-launcher": "~2.1.1",
"karma-cli": "~1.0.1",
"karma-coverage-istanbul-reporter": "^1.4.2",
"karma-jasmine": "~1.1.0",
"karma-jasmine-html-reporter": "^0.2.2",
"protractor": "~5.1.2",
"ts-node": "~3.2.0",
"tslint": "~5.7.0",
"typescript": "~2.4.2"
}

编辑 仅当我使用以下命令将应用程序部署到 Firebase 后运行应用程序时才会出现此问题：

ng build --prod
firebase deploy

当我点击 1:789549 抛出的异常时：

我可以通过我的 chrome 浏览器在源控制台中看到这段代码：

(function(){var t={};return 
 t.id=this.myID,t.pw=this.myPW,t.ser=this.currentSerial,t}())

这是我的 auth.service.ts。 仅在生产环境中调用函数 Login() 时会引发异常。

import { UserService } from './user.service';
import { AppUser } from '../models/app-user';
import { AngularFireAuth } from 'angularfire2/auth';
import { Injectable } from '@angular/core';
import * as firebase from 'firebase';
import { Observable } from 'rxjs/Observable';
import { ActivatedRoute } from '@angular/router';
import 'rxjs/add/operator/switchMap';
import 'rxjs/add/observable/of';

@Injectable()
export class AuthService {
user$: Observable<firebase.User>;

constructor(
   private afAuth: AngularFireAuth, 
   private route: ActivatedRoute,
   private userService: UserService) {
   this.user$ = afAuth.authState;
 }

login(){
let returnUrl = this.route.snapshot.queryParamMap.get('returnUrl') || '/';
localStorage.setItem('returnUrl', returnUrl);

this.afAuth.auth.signInWithRedirect(new firebase.auth.GoogleAuthProvider());
}

logout(){
    this.afAuth.auth.signOut();
}

get appUser$(): Observable<AppUser>{
  return this.user$
  .switchMap(user => {
    if (user) return this.userService.get(user.uid).valueChanges();
    return Observable.of(null);
});
}
}

Answer 1

这里有一个解决方法：

如果我使用以下方法修改我的 login() 方法：

this.afAuth.auth.signInWithPopup(new firebase.auth.GoogleAuthProvider());

而不是：

 this.afAuth.auth.signInWithRedirect(new firebase.auth.GoogleAuthProvider());

我现在可以连接到生产环境。这个问题的根源似乎在于重定向功能。

Answer 2

只需在您的 app.component.ts 中执行此操作

constructor() {
    localStorage.removeItem('firebase:previous_websocket_failure');
}