Angular code to request server for signin

public.js.index.js

var app1=angular.module('app1',[]);
app1.controller('cntrl1',function($scope,$http,$window){
    $scope.signin= function () {
        $http.post('/signin',$scope.emp).success(function(response){
            if(response.message === 'success'){
                $window.location.href='./ibm_homepage.html';
            }
            else{
                $scope.message="username/password is wrong";
            }
        });
    }
});