Convert factory to service in Angularjs -

i'm using $resource fetch json server working fine:

topicservices.factory('topic', ['$resource',   function($resource){     return $resource('http://localhost/topic_api_response.json', {}, {       fetchdata: {method:'get', isarray:true}     });   }]); 

however, want convert factory service doing this:

topicservices.service('topic', ['$resource',     function($resource) {         this.fetchdata = function() {             var resp = $resource('http://localhost/topic_api_response.json');             return resp;     }; }]); 

in doing so, i'm not able figure out specify request method (get/post) , give get/post params

going "service" style of defining, should read angular docs.

anyways here how go: have separated out fetchdata method, seems hit http get. hence can write code follows.

topicservices.service('topic', ['$http',     function($http) {         this.fetchdata = function() {             var resp = $http.get('http://localhost/topic_api_response.json');             return resp;     }; }]); 

if want use $resource wrap below:

topicservices.service('topic', ['$resource',         function($resource) {             this.myresource = function() {                 var resp = $resource('http://localhost/topic_api_response.json',params,{fetchdata:{}});                 return resp;         };     }]);