from .database import database_connection import falcon db = database_connection() db.set_session(readonly=True) class AllItemsResource: def on_get(self, req, resp): """Handles GET requests""" # Return HTTPBadRequest if id parameter is not present and valid limit = req.get_param_as_int("limit", min=0, max=100) or 100 page = req.get_param_as_int("page", min=0) or 0 offset = limit * page cursor = db.cursor() # get total number of items so we can estimate the pages cursor.execute('SELECT COUNT(id) FROM items') pages = round(cursor.fetchone()[0] / limit) # get statistics, ordered by id, and use limit and offset to page through results cursor.execute('SELECT id, views, downloads FROM items ORDER BY id ASC LIMIT {} OFFSET {}'.format(limit, offset)) # create a list to hold dicts of item stats statistics = list() # iterate over results and build statistics object for item in cursor: statistics.append({ 'id': item['id'], 'views': item['views'], 'downloads': item['downloads'] }) cursor.close() message = { 'currentPage': page, 'totalPages': pages, 'limit': limit, 'statistics': statistics } resp.media = message class ItemResource: def on_get(self, req, resp, item_id): """Handles GET requests""" cursor = db.cursor() cursor.execute('SELECT views, downloads FROM items WHERE id={}'.format(item_id)) if cursor.rowcount == 0: raise falcon.HTTPNotFound( title='Item not found', description='The item with id "{}" was not found.'.format(item_id) ) else: results = cursor.fetchone() statistics = { 'id': item_id, 'views': results['views'], 'downloads': results['downloads'] } resp.media = statistics cursor.close() def on_exit(api): print("Shutting down DB") api = falcon.API() api.add_route('/items', AllItemsResource()) api.add_route('/item/{item_id:int}', ItemResource()) # vim: set sw=4 ts=4 expandtab: