如何从角度前端向laravel API发送请求？

I'm building a RESTful API with Laravel 5.2 and I have an AngularJS 1.5 front end. I am successfully writing services to get information but I am having troubble putting or posting anything to the database when I pass it to the API. I've tried doing some searching and but I just don't understand how to actually save data I would send the API. Here is my attempt so far:

-Service from the Factory-

addReceipt: function(request) { 
            return $http.post(api_url + "/rewards/receipts/add", request).then(function(results) {
              console.log(results);
              return results.data;
            });
        }

-From the Controller

$scope.submitReceipt = function() {
                rewardsFactory.addReceipt($scope.model).then(function() {
                    console.log($scope.model);
                    toaster.pop({ type: 'success', title: 'Claim Submitted!', body: "Thanks! We'll take a look at your claim shortly.", showCloseButton: true });
                });
            };

-From Laravel API routes

Route::post('rewards/receipts/add', 'Rewards\RewardsController@addReceipt');

-From Laravel Controller

public function addReceipt(Request $request)
    {
        //Add the Receipt
        DB::table('receipts')->insert(
            ['transaction_id' => $request->input('transactionID'), 
             'client_id' => $request->input('client_id'), 
             'location_id' => $request->input('location_id') ]
        );
    }

My Current Cors setup seems to be working out well enough for at least some traffic so I don't think that is the problem but I'm just still not sure what I'm doing wrong.

Note that $http does not send form encoded data by default, it sends application/json in request body.

I don't do any work with laravel but if you check $_POST you will see it is empty so $request->input is probably empty also.

In php you can access the response body using :

json_decode(file_get_contents('php://input')[,true/*optional to convert to array*/])

I believe that json_decode($request->getContent()) will do the same in laravel

The alternative is to use the following $http set up taken from the docs to send form encoded data

.controller(function($http, $httpParamSerializerJQLike) {
  //...

  $http({
    url: myUrl,
    method: 'POST',
    data: $httpParamSerializerJQLike(myData),
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded'
    }
  });

});

You can also set $http.defaults in a run block so all post or put are sent as x-www-form-urlencoded and not have to add the config to each use