Angular HTTP Interceptor
Generic httpInterceptor step by step
Create an HTML file with the following content:
<!DOCTYPE html>
<html>
<head>
<title>Angular Interceptor Sample</title>
<script src="https://code.angularjs.org/1.5.8/angular.min.js"></script>
<script src="app.js"></script>
<script src="appController.js"></script>
<script src="genericInterceptor.js"></script>
</head>
<body ng-app="interceptorApp">
<div ng-controller="appController as vm">
<button ng-click="vm.sendRequest()">Send a request</button>
</div>
</body>
</html>Add a JavaScript file called 'app.js':
var interceptorApp = angular.module('interceptorApp', []);
interceptorApp.config(function($httpProvider) {
$httpProvider.interceptors.push('genericInterceptor');
});Add another one called 'appController.js':
(function() {
'use strict';
function appController($http) {
var vm = this;
vm.sendRequest = function(){
$http.get('http://google.com').then(function(response){
console.log(response);
});
};
}
angular.module('interceptorApp').controller('appController',['$http', appController]);
})();And finally the file containing the interceptor itself 'genericInterceptor.js':
(function() {
"use strict";
function genericInterceptor($q) {
this.responseError = function (response) {
return $q.reject(response);
};
this.requestError = function(request){
if (canRecover(rejection)) {
return responseOrNewPromise
}
return $q.reject(rejection);
};
this.response = function(response){
return response;
};
this.request = function(config){
return config;
}
}
angular.module('interceptorApp').service('genericInterceptor', genericInterceptor);
})();The 'genericInterceptor' cover the possible functions which we can override adding extra behavior to our application