Get and display data from web server

Hello everyone. i’am trying to send data from esp8266 to my ionic app throw mqtt server.
here’s my code
nodejs index.js

var Hapi = require(‘hapi’);
var mqtt = require(‘mqtt’);

var server = new Hapi.Server();
var port = Number(process.env.PORT || 4444);

server.connection({ port: port, routes: { cors: true } });

var client = mqtt.connect(‘mqtt://test.mosquitto.org:1883’);

var mqttPublish = function(topic, msg){
client.publish(topic, msg, function() {
console.log('msg sent: ’ + msg);
});
}

//client.subscribe(“device/sensor”);

var mqttSubdcribe = function(topic, msg){
client.subscribe(topic, msg, function() {
console.log('msg received: ’ + msg);
});
}

server.route([
{
method: ‘POST’,
path: ‘/device/control’,
handler: function (request, reply) {
var deviceInfo = ‘dev’ + request.payload.deviceNum + ‘-’ + request.payload.command;
reply(deviceInfo);
mqttPublish(‘device/control’, deviceInfo, {
‘qos’ : 2
});
}
}
]);

server.route([
{
method: ‘GET’,
path: ‘/device/sensor’,
handler: function (request, reply) {
var deviceInfo = ‘dev222222222_hello world’;
reply(deviceInfo);
mqttSubdcribe(‘device/sensor’, deviceInfo, {
‘qos’ : 2
});
console.log(deviceInfo.toString())
}
}a
]);

server.start();

ionic app
services.js

angular.module(‘starter.services’, )

.factory(‘Devices’, function($http) {
// Might use a resource here that returns a JSON array

var ipServer = ‘http://esp8266-relays.herokuapp.com’;
//var ipServer = ‘https://damp-harbor-45648.herokuapp.com’;

return {
deviceCommand: function(data) {
console.log(data);
return $http.post(ipServer + ‘/device/control’, data);
},
all: function () {
return $http.get(ipServer + ‘/device/sensor’)
},
get: function () {
return $http.get(ipServer + ‘/device/sensor’)
}
};
});

controllers.js

angular.module(‘starter.controllers’, )

.controller(‘DashCtrl’, function($scope, $stateParams, Devices) {

$scope.powerOff = function (deviceNum) {
deviceControl(deviceNum, ‘off’);
}

$scope.powerOn = function (deviceNum) {
deviceControl(deviceNum, ‘on’);
}

function deviceControl(deviceNum, command){
var deviceInfo = {
deviceNum : deviceNum,
command : command
};

Devices.deviceCommand(deviceInfo)
  .success(function (data) {
    console.log(data)
  })
  .error(function (error) {
    console.log(error)
  });

}

})

.controller(‘AboutCtrl’, function($scope, $stateParams, Devices) {
Devices.all().success(function (response) {
$scope.friends = response;
})
});

aboutTab.html

> <ion-view view-title="About">
>   <ion-content>
>   <ion-list>
>       <ion-item class="item-icon-right padding" ng-repeat="data in friends">
>           <p>{{ data}}</p>
>           <i class="icon ion-chevron-left icon-accessory"></i>
>       </ion-item>
>     </ion-list>
>   </ion-content>
> </ion-view>

for post method it works but not with get method! it shows this error
GET http://esp8266-relays.herokuapp.com/device/sensor 404 (Not Found)

any idea PLEASE? what am’i doing wrong?