在使用 routeProvider 在 Angular 中启动路由之前，如何检查登录或其他状态? [英] How do I check for login or other status before launching a route in Angular with routeProvider?

问题描述

假设我有 4 条路线 - 2 条需要用户登录，2 条不需要.我的应用初始化看起来像:

Let's say I have 4 routes - 2 require the user to be logged in, 2 do not. My app init looks like:

        $routeProvider.when('/open1',{templateUrl:'/open1.html',controller:'Open1'});
        $routeProvider.when('/open2',{templateUrl:'/open2.html',controller:'Open2'});
        $routeProvider.when('/secure1',{templateUrl:'/secure1.html',controller:'Secure1'});
        $routeProvider.when('/secure2',{templateUrl:'/secure2.html',controller:'Secure2'});

路由/open1 和/open2 对所有人开放，而路由/secure1 和/secure2 需要要登录的用户，如果没有，则采取一些操作，例如重定向登录或启动警告.我可以通过使用我的 Auth 服务并调用例如 Auth.isLogin() 来确定用户的状态.所以结果是:

Routes /open1 and /open2 are open to all, while routes /secure1 and /secure2 require the user to be logged in and, if not, take some action, e.g. redirect to login or launch a warning. I can determine the user's state by using my Auth service and calling, e.g., Auth.isLogin(). So the result would be:

• 转到 /open1 和 /open2 总是转到上面声明的模板和控制器
• 如果 Auth.isLogin() 返回 true，/secure1 和 /secure2 转到上面声明的模板和控制器
• 如果 Auth.isLogin() 返回 false，/secure1 和 /secure2 会采取一些其他操作，例如$location.path('/login')

• going to /open1 and /open2 always go to the template and controller declared above
• if Auth.isLogin() returns true, /secure1 and /secure2 go to the above-declared template and controller
• if Auth.isLogin() returns false, /secure1 and /secure2 take some other action, e.g. $location.path('/login')

我可以将逻辑放在 Secure1 和 Secure2 控制器中进行检查，但这是重复的并且混淆了职责，使它们更难测试等

I could put logic in the Secure1 and Secure2 controllers that checks, but that is repetitive and mixes up responsibilities, makes them harder to test, etc.

有没有办法可以使用 $routeProvider 来声明检查这条路线和这条路线，如果没有，则重定向"?我正在考虑以某种方式使用 resolve，但不太确定如何使用它(resolve 上的文档不是很清楚，并且很少有有用的示例).

Is there a way that I can use the $routeProvider to declare, "check this route and this route and if not, redirect"? I was thinking of using resolve somehow, but not quite sure how to work it in (docs on resolve are not very clear, and few helpful examples).

根据下面的答案，似乎有三种方法可以做到这一点:

based on the answers below, it appears there are three philosophies for doing this:

• 使用 resolve 来检查登录并失败，然后捕获 $routeChangeError 事件以重定向 http://www.sitepoint.com/implementing-authentication-angular-applications/
• 仅使用 $routeChangeStart 事件来检查登录和重定向 http://arthur.gonigberg.com/2013/06/29/angularjs-role-based-auth/
• 使用 just resolve 检查登录并重定向 http://midgetontoes.com/博客/2014/08/31/angularjs-check-user-login

• Using resolve to check logged in and fail the promise, and then catching the $routeChangeError event to redirect http://www.sitepoint.com/implementing-authentication-angular-applications/
• Using just $routeChangeStart event to check logged in and redirect http://arthur.gonigberg.com/2013/06/29/angularjs-role-based-auth/
• Using just resolve to check logged in and redirect http://midgetontoes.com/blog/2014/08/31/angularjs-check-user-login

第二个选项是两位回答者的建议.

The 2nd option is what the two answerers have suggested.

推荐答案

在我上面的评论中，有 3 种不同的路径(如果您想从 html 模板中控制它，还可以使用指令).我最终关注了

As in my comments above, there are 3 different paths (plus the ability to use a directive if you want to control it from within html templates). I ended up following

https://midgetontoes.com/angularjs-check-user-login/

其本质如下:

$routeProvider.when('/secure', {
    templateUrl: '/secure.html', 
    controller: 'Secure',
    resolve:{
        loggedIn:onlyLoggedIn
    }
 });

然后onlyLoggedIn:

var onlyLoggedIn = function ($location,$q,Auth) {
    var deferred = $q.defer();
    if (Auth.isLogin()) {
        deferred.resolve();
    } else {
        deferred.reject();
        $location.url('/login');
    }
    return deferred.promise;
};

简单，就像一个魅力.如果我需要指令，我会将这部分放入服务中.

Simple, works like a charm. If I ever need a directive, I will pull this piece into a service.

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