controller.js

$scope.newSession = function(session){
  MeuServico.newSession(session).success(function(){
    //sucesso
  }).error(function(){
    //erro
  })
}

factory.js

var newSession = function(session) {
  return $http.post("minhaApi.com/criar", session);
};

view.html

<form ng-submit="newSession(session)">
  
  <input type="text" ng-model="session.abc" name="session.abc" />
  <input type="text" ng-model="session.xyz" name="session.xyz" />
  <input type="submit" id="submit" value="Submit" />
  
</form>