public function postSearch()
{
$params = Input::all();
// 楽天商品の検索
$rakuten_gestion = Rakuten::getInstance();
$rakuten_items = $rakuten_gestion->searchItemByKeyword($params['itemKeyword']);
// Amazon商品の検索
$amazon_gestion = Amazon::getInstance();
$amazon_items = $amazon_gestion->searchItemByKeyword($params['itemKeyword']);
$results = array_merge($rakuten_items, $amazon_items);
header('Content-Type: application/json');
echo json_encode($results);
exit;
}