为什么带有 ui-router 的 AngularJS 不断触发 $stateChangeStart 事件? [英] Why does AngularJS with ui-router keep firing the $stateChangeStart event?
问题描述
我正在尝试阻止所有 ui-router 状态更改，直到我对用户进行身份验证为止:
I'm trying to block all ui-router state changes until I've authenticated the user:
$rootScope.$on('$stateChangeStart', function (event, next, toParams) {
if (!authenticated) {
event.preventDefault()
//following $timeout is emulating a backend $http.get('/auth/') request
$timeout(function() {
authenticated = true
$state.go(next,toParams)
},1000)
}
})
在用户通过身份验证之前，我拒绝所有状态更改，但是如果我转到使用 otherwise() 配置的无效 URL，我会收到一个带有消息的无限循环:
I reject all state changes until the user has been authenticated, but if I go to an invalid URL that uses the otherwise() configuration, I get an infinite loop with a message:
Error: [$rootScope:infdig] 10 $digest() iterations reached. Aborting!
Watchers fired in the last 5 iterations: [["fn: $locationWatch; newVal: 7; oldVal: 6"],["fn: $locationWatch; newVal: 8; oldVal: 7"],["fn: $locationWatch; newVal: 9; oldVal: 8"],["fn: $locationWatch; newVal: 10; oldVal: 9"],["fn: $locationWatch; newVal: 11; oldVal: 10"]]
下面是我的 SSCCE.使用 python -m SimpleHTTPServer 7070 提供它并转到 localhost:7070/test.html#/bar 以查看它在您的脸上爆炸.而直接导航到唯一有效的 angularjs 位置不会炸毁 localhost:7070/test.html#/foo:
Below is my SSCCE. Serve it up with python -m SimpleHTTPServer 7070 and go to localhost:7070/test.html#/bar to see it explode in your face. Whereas directly navigating to the only valid angularjs location does not blow up localhost:7070/test.html#/foo:
<!doctype html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.10/angular-ui-router.min.js"></script>
</head>
<body ng-app="clientApp">
<div ui-view="" ></div>
<script>
var app = angular.module('clientApp', ['ui.router'])
var myRouteProvider = [
'$stateProvider', '$urlRouterProvider',
function($stateProvider, $urlRouterProvider) {
$urlRouterProvider.otherwise('/foo');
$stateProvider.state('/foo', {
url: '/foo',
template: '<div>In Foo now</div>',
reloadOnSearch: false
})
}]
app.config(myRouteProvider)
var authenticated = false
app.run([
'$rootScope', '$log','$state','$timeout',
function ($rootScope, $log, $state, $timeout) {
$rootScope.$on('$stateChangeStart', function (event, next, toParams) {
if (!authenticated) {
event.preventDefault()
//following $timeout is emulating a backend $http.get('/auth/') request
$timeout(function() {
authenticated = true
$state.go(next,toParams)
},1000)
}
})
}
])
</script>
</body>
</html>
我应该使用替代方法来完成此身份验证阻止吗?我确实意识到这种身份验证阻塞只是客户端.在这个例子中，我没有展示服务器端的东西.
Is there an alternative method I should use to accomplish this authentication blocking? I do realize this authentication blocking is client side only. I'm not showing the server side of things in this example.
推荐答案
Fakeout.这是 $urlRouterProvider 和 $stateProvider 之间的交互问题.我不应该为我的 otherwise 使用 $urlRouterProvider.我应该使用类似的东西:
Fakeout. This is an interaction issue between $urlRouterProvider and $stateProvider. I shouldn't be using $urlRouterProvider for my otherwise. I should be using something like:
$stateProvider.state("otherwise", {
url: "*path",
template: "Invalid Location",
controller: [
'$timeout','$state',
function($timeout, $state ) {
$timeout(function() {
$state.go('/foo')
},2000)
}]
});
甚至是一个透明的重定向:
Or even a transparent'ish redirect:
$stateProvider.state("otherwise", {
url: "*path",
template: "",
controller: [
'$state',
function($state) {
$state.go('/foo')
}]
});
现在:
<!doctype html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.js"></script>
<script src="//ajax.googleapis.com/ajax/libs/angularjs/1.2.15/angular.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/angular-ui-router/0.2.10/angular-ui-router.min.js"></script>
</head>
<body ng-app="clientApp">
<div ui-view="" ></div>
<script>
var app = angular.module('clientApp', ['ui.router'])
var myRouteProvider = [
'$stateProvider',
function($stateProvider) {
$stateProvider.state('/foo', {
url: '/foo',
template: '<div>In Foo now</div>',
reloadOnSearch: false
})
$stateProvider.state("otherwise", {
url: "*path",
template: "",
controller: [
'$state',
function($state) {
$state.go('/foo')
}]
});
}]
app.config(myRouteProvider)
var authenticated = false
app.run([
'$rootScope', '$log','$state','$timeout',
function ($rootScope, $log, $state, $timeout) {
$rootScope.$on('$stateChangeStart', function (event, next, toParams) {
if (!authenticated) {
event.preventDefault()
//following $timeout is emulating a backend $http.get('/auth/') request
$timeout(function() {
authenticated = true
$state.go(next,toParams)
},1000)
}
})
}
])
</script>
</body>
</html>
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