Reactjs 刷新时firebase身份验证延迟
我的SPA React/Firebase应用程序上的硬刷新不会在立即执行函数时保持身份验证状态。我有一个解决办法,但它是粗略的 My react routes利用Reactjs 刷新时firebase身份验证延迟,reactjs,firebase,react-router,firebase-authentication,Reactjs,Firebase,React Router,Firebase Authentication,我的SPA React/Firebase应用程序上的硬刷新不会在立即执行函数时保持身份验证状态。我有一个解决办法,但它是粗略的 My react routes利用oneter功能来确定用户是否经过身份验证。比如说 <Route path="/secure" component={Dashboard} onEnter={requireAuth}/> 但是,在硬刷新时,firebase.auth().currentUser上有轻微延迟。它首先为空,然后对firebase服务器执行POS
oneter
功能来确定用户是否经过身份验证。比如说
<Route path="/secure" component={Dashboard} onEnter={requireAuth}/>
但是,在硬刷新时,firebase.auth().currentUser
上有轻微延迟。它首先为空,然后对firebase服务器执行POST
,以确定身份验证状态。当它返回时,将填充currentUser
对象。不过,这种延迟会引起一些问题
我的黑客解决方案如下:更新:这实际上不起作用
function (nextState, replace) {
setTimeout(function () {
console.log('requireAuth', firebase.auth().currentUser);
if (!firebase.auth().currentUser) {
console.log('attempting to access a secure route. please login first.');
replace({
pathname: '/login',
state: { nextPathname: nextState.location.pathname }
});
}
}, 50);
};
只需将其包装为超时。然而,我真的不喜欢这个。。。有什么想法吗
更新:
我还尝试将它包装在一个onAuthStateChanged
侦听器中,这应该比一个带有确定时间延迟的setTimeout
更准确。代码如下:
function (nextState, replace) {
var unsubscribe = firebase.auth().onAuthStateChanged(function (user) {
if (!user) {
console.log('attempting to access a secure route');
replace({
pathname: '/login',
state: { nextPathname: nextState.location.pathname }
})
console.log('should have called replace');
}
unsubscribe();
});
// setTimeout(function () {
// console.log('requireAuth', firebase.auth().currentUser);
// if (!firebase.auth().currentUser) {
// console.log('attempting to access a secure route. please login first.');
// replace({
// pathname: '/login',
// state: { nextPathname: nextState.location.pathname }
// });
// }
// }, 50);
};
执行两条日志语句,但react routerreplace
似乎没有正确执行。对于路由器专家来说,这可能是一个不同的问题
更新2:
我做这件事的时候已经是深夜了。显然,
setTimeout
实际上也不起作用 好的。因此,我能够通过利用firebase提供的localStorage
变量来存储用户信息来解决这个问题
function (nextState, replace) {
if (!firebase.auth().currentUser) {
let hasLocalStorageUser = false;
for (let key in localStorage) {
if (key.startsWith("firebase:authUser:")) {
hasLocalStorageUser = true;
}
}
if (!hasLocalStorageUser) {
console.log('Attempting to access a secure route. Please authenticate first.');
replace({
pathname: '/login',
state: { nextPathname: nextState.location.pathname }
});
}
}
};
虽然这是一篇与ReactJS相关的文章,但我最近在为AngularJS编写自己的身份验证/授权服务时遇到了同样的问题。在页面刷新时,
onAuthStateChanged
传递的用户为null
,因为firebase仍在初始化(异步)
唯一对我有效的解决方案是在用户登录后将用户uid存储在localStorage
中,并在用户注销后删除该值
由于我分别使用了authService
和userService
,因此我在authService
中注册了一个侦听器,该侦听器在用户登录/注销后启动
代码示例authService(不是完整的authService):
在运行块中,您可以全局注册用户,并在每次路由更改时解析用户信息/详细信息(使其更安全):
也许这可以帮助那些在同样问题上挣扎的人。除此之外,请随意优化和讨论代码示例。通过管理本地存储来工作。下面是我如何做到这一点的例子
constructor(props) {
super(props);
let authUser = null;
// setting auth from localstorage
for (let key in localStorage) {
if (key === storageId) {
authUser = {};
break;
}
}
this.state = {authUser};
}
componentDidMount() {
firebase
.auth
.onAuthStateChanged(authUser => {
if (authUser) {
localStorage.setItem(storageId, authUser.uid);
} else {
localStorage.removeItem(storageId);
}
// change state depending on listener
authUser
? this.setState({authUser})
: this.setState({authUser: null});
});
}
这对我来说很有效。根据firebase.auth的状态,尝试将您的主应用程序包装在if-else语句中
constructor(){
超级();
这个州={
用户:{},
stateChanged:false
};
}
componentDidMount(){
fire.auth().onAuthStateChanged((用户)=>{
this.setState({stateChanged:true})
});
}
render(){
if(this.state.stateChanged==false){
返回(
加载
)
}
否则{
return(您的代码在这里…)
}
}
我想我刚才回答了一个类似的问题:@FrankvanPuffelen我确实试过类似的方法。从requireAuth函数wrapp中,firebase.auth()中的内容已更改(函数(用户){…});然而,react路由器的replace函数在这种情况下似乎并没有做任何事情。我将更新这个问题。如果在单独的本地存储变量中,为什么需要存储用户?它已经在那里了。另外,角度角度的解决方案也不错。这只是设计选择的问题。当然,您可以将整个用户保存在localStorage中,但我不喜欢对localStorage的太多引用。在我的解决方案中,a在firebase引用中具有特定的用户信息(详细信息),如“/users”,这允许侦听“child_added”事件或firebase推送的任何其他事件。如果在您的情况下这感觉像是开销,您可以选择不同的方法。如果我转到您的网站,打开控制台并编写localStorage.set(“firebase:authUser:123123123”,“123123”)
,会发生什么情况?firebase现在似乎使用索引数据库,因此此黑客不再有效。
var loginListeners = [];
var logoutListeners = [];
function addLoginListener(func) {
loginListeners.push(func);
}
function addLogoutListener(func) {
logoutListeners.push(func);
}
function login(email, password) {
return firebase.auth().signInWithEmailAndPassword(email, password).then(function(user) {
for(var i = 0; i < loginListeners.length; i++) {
loginListeners[i](user); // call registered listeners for login
}
});
}
function logout() {
return firebase.auth().signOut().then(function() {
for(var i = 0; i < logoutListeners.length; i++) {
logoutListeners[i](); // call registered listeners for logout
}
});
}
.provider('userService', ['authServiceProvider',
function UserService(authServiceProvider) {
var usersRefUrl = '/users';
var userInfo = null;
var userDetails = null;
// refreshHack auto-executed when this provider creates the service
var storageId = 'firebase:uid'; // storing uid local because onAuthStateChanged gives null (when async initializing firebase)
(function addRefreshHackListeners() {
authServiceProvider.addLoginListener(function(user) {
userInfo = user;
localStorage.setItem(storageId, user.uid); // store the users uid after login so on refresh we have uid to retreive userDetails
});
authServiceProvider.addLogoutListener(function() {
userInfo = null;
localStorage.removeItem(storageId);
});
firebase.auth().onAuthStateChanged(function(user) {
if(user) { // when not using refreshHack user is null until async initializing is done (and no uid is available).
localStorage.setItem(storageId, user.uid);
userInfo = user;
resolveUserDetails();
} else {
localStorage.removeItem(storageId);
userInfo = null;
userDetails = null;
}
});
})();
function isLoggedIn() {
return userInfo ? userInfo.uid : localStorage.getItem(storageId); // check localStorage for refreshHack
}
function resolveUserDetails() {
var p = null;
var uid = isLoggedIn();
if(uid)
p = firebase.database().ref(usersRefUrl + '/' + uid).once('value').then(function(snapshot) {
userDetails = snapshot.val();
return userDetails;
}).catch(function(error) {
userDetails = null;
});
return p; // resolve by returning a promise or null
}
}]);
.run(['$rootScope', 'userService', 'authService',
function($rootScope, userService, authService) {
// make user available to $root in every view
$rootScope.user = userService.getUser();
$rootScope.$on('$routeChangeStart',
function(event, next, current) {
// make sure we can add resolvers for the next route
if(next.$$route) {
if(next.$$route.resolve == null)
next.$$route.resolve = {};
// resolve the current userDetails for every view
var user = userService.resolveUserDetails();
next.$$route.resolve.userDetails = function() {
return user;
}
}
});
}]);
constructor(props) {
super(props);
let authUser = null;
// setting auth from localstorage
for (let key in localStorage) {
if (key === storageId) {
authUser = {};
break;
}
}
this.state = {authUser};
}
componentDidMount() {
firebase
.auth
.onAuthStateChanged(authUser => {
if (authUser) {
localStorage.setItem(storageId, authUser.uid);
} else {
localStorage.removeItem(storageId);
}
// change state depending on listener
authUser
? this.setState({authUser})
: this.setState({authUser: null});
});
}