如何使onBeforeAction调用等到meteor.js中的函数调用完成? [英] How to make onBeforeAction call wait until a function call inside finishes in meteor.js?
问题描述
我有一个与meteor.js同步的onBeforeAction方法
I have a synchronized onBeforeAction method with meteor.js
Router.onBeforeAction(function() {
var self;
self = this;
authToken = Session.get('authToken');
if (!authToken) {
this.redirect('login');
this.next();
} else {
Meteor.call('validateAuthToken', authToken, function (error, result)) {
if (result) {
self.next();
} else {
self.redirect('login');
self.next();
}
}
}
});
我需要通过调用服务器调用来验证存储在Session中的身份验证令牌.但是,当我执行此方法时,它总是会引发异常.而且我发现原因是因为onBeforeAction调用在validateAuthToken调用返回之前被终止了.因此self.next()不会采取任何措施.因此,我想知道如何防止onBeforeAction调用停止直到validateAuthToken返回经过验证的结果然后继续进行?
I need to validate an authentication token stored in Session by invoking a server call. But this method always throws an exception when I am executing it. And I found out the reason is because the onBeforeAction call is terminated before the validateAuthToken call returns. And thus the self.next() won't take action. So I wonder what can I do to prevent the onBeforeAction call from stopping until the validateAuthToken returns the validated result and then proceed?
我通过等待会话变量尝试了不同的实现,但是似乎就绪状态从未设置为true
I've tried a different implementation by wait on a session variable, but it seems the ready state is never set to true
Router.onBeforeAction(function() {
var authToken;
authToken = Session.get('authToken');
if (!authToken) {
this.redirect('login');
this.next();
} else {
Meteor.call('validateAuthToken', authToken, function (error, result) {
if (!error) {
Session.set("tokenValidated", result);
}
});
this.wait(Meteor.subscribe('token', Session.get('tokenValidated')));
if (this.ready()) {
if (!Session.get("tokenValidated")) {
this.redirect('login');
this.next();
} else {
this.next();
}
}
}
});
推荐答案
您还可以使用 https://github.com/iron-meteor/iron-router/issues/426
Ready = new Blaze.ReactiveVar(false);
Router.route('feed',{
waitOn: function () {
Meteor.call('getInstagramUserFeed', function(error, result) {
if(!error) Ready.set(result)
});
return [
function () { return Ready.get(); }
];
},
action: function () {
if (this.ready()) this.render('feed')
else this.render('LoadingMany');
}
});
这篇关于如何使onBeforeAction调用等到meteor.js中的函数调用完成?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!