Here's what I do. I'm using $resournce instead of $http, but it should be enough to get you going. You may even want to use the $resource since it has the built in fns.

My Factory fns.

.factory('WorkOrder', function($resource){

// $resource Usage: $resource(url[, paramDefaults][, actions]);
return $resource('/controller/get/:id.json', {}, {
    /*
     * By default, the following actions are returned; modify or add as needed
     * { 'get':    {method:'GET'},
     *   'save':   {method:'POST'},
     *   'query':  {method:'GET', isArray:true},
     *   'delete': {method:'DELETE'} };
     */
});

})

My Controller.

// get the work order data using the work order id from the tag attribute
var getWO = function() {

WorkOrder.get({woId:$attrs.id},

    // success callback
    function(response) {
        // Assign the work order data to the scope
        $scope.WorkOrder            = response.WorkOrder;
    },

    // fail callback
    function(response) {
        // whatever...
    }
);
};
getWO();

I put my success and fail fns in my controller because that's where I most likely know how I want to respond to success or failed calls. I also assign the function to a variable and then call it right after in case I want to include the fn call inside a $timeout or call it elsewhere.

You can create as many factory fns as you want. If there's a dependency between factory fn calls, then you can put the dependent call within your success callback of your controller.

Hope this answers your question.

Here's what I do. I'm using $resource instead of $http, but it should be enough to get you going. You may even want to use the $resource since it has the built-in functions.

My Factory fns.

.factory('WorkOrder', function($resource){

// $resource Usage: $resource(url[, paramDefaults][, actions]);
return $resource('/controller/get/:id.json', {}, {
    /*
     * By default, the following actions are returned; modify or add as needed
     * { 'get':    {method:'GET'},
     *   'save':   {method:'POST'},
     *   'query':  {method:'GET', isArray:true},
     *   'delete': {method:'DELETE'} };
     */
});

})

My Controller.

// get the work order data using the work order id from the tag attribute
var getWO = function() {

WorkOrder.get({woId:$attrs.id},

    // success callback
    function(response) {
        // Assign the work order data to the scope
        $scope.WorkOrder            = response.WorkOrder;
    },

    // fail callback
    function(response) {
        // whatever...
    }
);
};
getWO();

I put my success and fail fns in my controller because that's where I most likely know how I want to respond to success or failed calls. I also assign the function to a variable and then call it right after in case I want to include the fn call inside a $timeout or call it elsewhere.

You can create as many factory fns as you want. If there's a dependency between factory fn calls, then you can put the dependent call within your success callback of your controller.

Hope this answers your question.