How to handle user authentication and authorization in AngularJS?
13/03/2024
•
5
min
Here's a simplified guide to handle user authentication and authorization in AngularJS:
Step 1: Let's start by creating a new project folder named “AngularAuth” and open your favorite code editor.
Step 2: Install AngularJs into your project by either downloading it from the official website or using a package manager like npm or bower. Add the AngularJS script to your HTML file:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
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Step 3: Let's create angular app and controller. Create a new JavaScript file named 'app.js'
var app = angular.module('authApp', []);
app.controller('authCtrl', function($scope){
$scope.msg = 'Hello, This is authentication app'
});
Include 'app.js' to index.html:
<script src="app.js"></script>
Step 4: In the body of HTML, attach your app and the controller:
<body ng-app="authApp" ng-controller="authCtrl">
{{msg}}
</body>
Step 5: Now let's create a simple login form:
<div>
<label>User Name</label>
<input type="text" ng-model="username" placeholder="Enter your username">
<label>Password</label>
<input type="password" ng-model="password" placeholder="Enter your Password">
<button ng-click="login()">Login</button>
</div>
Step 6: To make it functional, we have to modify our app.js.
var app = angular.module('authApp', []);
app.controller('authCtrl', ['$scope', '$location', function($scope, $location){
$scope.login= function (){
if ($scope.username === 'admin' && $scope.password === 'password') {
$location.path('/home');
}
else{
alert('Wrong username or password')
}
}
}]);
Step 7: To manage routes, you might want to use AngularJS routes. To make it work you need to inject 'ngRoute' dependency in your module. You must also include script of angular-route.js:
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.28//angular-route.min.js"></script>
Step 8: Then configure your routes:
app.config(function($routeProvider) {
$routeProvider
.when('/', {
templateUrl : 'login.html',
controller : 'authCtrl'
})
.when('/home', {
resolve: {
"check": function($location, $rootScope) {
if(!$rootScope.loggedIn) {
$location.path('/');
}
}
},
templateUrl : 'home.html',
controller : 'homeCtrl'
})
.otherwise({
redirectTo: '/'
});
});
Step 9: Finally, make sure your server is setup to always serve your index.html file anytime a GET request is made, so AngularJS can handle the routing.
This is a very basic authentication method in AngularJS. For a full authentication you'll need a backend server, token systems, etc. You might want to use libraries such as Satellizer to make the process easier.
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