api.py 文件源码

def on_post(self, request, response, vertex_id):
        query = dict()
        try:
            raw_json = request.stream.read()
        except Exception as e:
            raise falcon.HTTPError(falcon.HTTP_400, 'Error', e.message)

        try:
            data = json.loads(raw_json, encoding='utf-8')
        except ValueError:
            raise falcon.HTTPError(falcon.HTTP_400, 'Malformed JSON')

        data["id"] = vertex_id
        try:
            query = list(graph.query_vertices({ "id" : vertex_id }))
        except Exception as e:
            raise falcon.HTTPError(falcon.HTTP_400, 'Error', e.message)

        if len(query) > 0:
            raise falcon.HTTPConflict('Vertex Creation', "Vertex already exists.")

        try:
            result = graph.update_vertex(**data)
        except Exception as e:
            raise falcon.HTTPError(falcon.HTTP_400, 'Error', e.message)

        response.status = falcon.HTTP_200
        response.body = json.dumps({ "created" : result }, encoding='utf-8')