Пишем полезный сервис на Python для получении ИНН

{
	 "requestId": str,
	 "firstName": str,
	 "lastName": str,
	 "middleName": str,
	 "birthDate": date,
	 "documentSerial": str,
	 "documentNumber": str,
	 "documentDate": date
}

{
	"requestId": str,
	"inn": str,
	"cached": bool,
	"details": str,
	"elapsedTime": float
}

class Settings(BaseSettings):  
    app_name: str = 'INN service'  
    app_request_retry_times: int  # Количество попыток обработки внешнего запроса  
    app_request_retry_sec: int  # Время задержки в секундах перед повторной обработкой запроса  
  
    http_host: str  
    http_port: int  
    http_handler: str = 'asyncio'  
  
    mongo_host: str  
    mongo_port: str  
    mongo_user: str  
    mongo_pass: str  
    mongo_name: str  
    mongo_rs: Optional[str] = None  
    mongo_auth: str  
    mongo_timeout_server_select: int = 5000  
  
    rabbitmq_host: str  
    rabbitmq_port: int  
    rabbitmq_user: str  
    rabbitmq_pass: str  
    rabbitmq_vhost: str  
    rabbitmq_exchange_type: str  
    rabbitmq_prefetch_count: int  
    rabbitmq_source_queue_name: str  
  
    client_nalog_url: str  # Адрес внешнего сервиса для получения ИНН  
    client_nalog_timeout_sec: int  # Таймаут ожидания ответа от сервиса  
    client_nalog_retries: int  # Количество попыток запросов к внешнему сервису  
    client_nalog_wait_sec: int  # Время ожидания между попытками client_nalog_retries  
  
    @property  
    def mongo_dsn(self) -> str:  
        mongo_dsn = 'mongodb://{}:{}@{}:{}/{}'.format(  
            self.mongo_user,  
            self.mongo_pass,  
            self.mongo_host,  
            self.mongo_port,  
            self.mongo_auth  
        )  
  
        if self.mongo_rs:  
            mongo_dsn += f'?replicaSet={self.mongo_rs}'  
  
        return mongo_dsn  
  
    @property  
    def rabbitmq_dsn(self) -> str:  
        return 'amqp://{}:{}@{}:{}/{}'.format(  
            self.rabbitmq_user,  
            self.rabbitmq_pass,  
            self.rabbitmq_host,  
            self.rabbitmq_port,  
            self.rabbitmq_vhost  
        )

class StartupEventMixin(ABC):  
  
    @abstractmethod  
    def startup(self) -> Coroutine:  
        raise NotImplementedError  
  
  
class ShutdownEventMixin(ABC):  
  
    @abstractmethod  
    def shutdown(self) -> Coroutine:  
        raise NotImplementedError

class RabbitConnectionManager(StartupEventMixin, ShutdownEventMixin, EventLiveProbeMixin):  
    def startup(self) -> Coroutine:  
        return self.create_connection()

	def shutdown(self) -> Coroutine:  
        return self.close_connection()  
  
	async def create_connection(self) -> None:  
	    self.logger.info('Create connection RabbitMQ')  
	    try:  
	        self._connection = await connect_robust(self._dsn)  
	        self._connection.reconnect_callbacks.add(self.on_connection_restore)  
	        self._connection.close_callbacks.add(self.on_close_connection)  
	        self.connected = True  
	    except ConnectionError as exc:  
	        err_message = f'Rabbit connection problem: {exc}'  
	        self.logger.error(err_message)  
	        raise ConnectionError(err_message)  
	  
	async def close_connection(self) -> None:  
	    if self._connection:  
	        await self._connection.close()
	
	# ... некоторый код пропущен, полная версия на гитхабе
	
	def on_close_connection(self, *args):  
	    self.logger.error('Lost connection to RabbitMQ...')  
	    self.connected = False  
	  
	def on_connection_restore(self, *args):  
	    self.logger.info('Connection to RabbitMQ has been restored...')  
	    self._channel = None  
	    self._exchange = None  
	    self.connected = True

class BaseHandler(ABC):  
    def __init__(  
            self,  
            settings: Settings,  
            logger: AppLogger,  
            rabbitmq_connection: RabbitConnectionManager  
    ) -> None:  
        self.settings = settings  
        self.logger = logger  
        self.rabbitmq_connection = rabbitmq_connection  
  
    @abstractmethod  
    def get_use_retry(self) -> bool:  
        raise NotImplementedError  
  
    def get_retry_ttl(self) -> int:  
        return 0  
  
    @abstractmethod  
    def get_source_queue(self) -> str:  
        raise NotImplementedError  
  
    def convert_seconds_to_mseconds(self, value: int) -> int:  
        return value * 1000  
  
    @abstractmethod  
    async def run_handler(  
            self,  
            message: dict,  
            request_id: Optional[str],  
            result_queue: Optional[str],  
            count_retry: Optional[int] = 0  
    ) -> bool:  
        raise NotImplementedError

class RequestHandler(BaseHandler):  
    def __init__(  
            self,  
            settings: Settings,  
            logger: AppLogger,  
            rabbitmq_connection: RabbitConnectionManager,  
            service: InnService  
    ) -> None:  
        super().__init__(settings, logger, rabbitmq_connection)  
        self.source_queue_name = self.settings.rabbitmq_source_queue_name  
        self.retry_times = self.settings.app_request_retry_times  
        self.retry_sec = self.settings.app_request_retry_sec  
        self.service = service  
  
    def get_source_queue(self) -> str:  
        return self.source_queue_name  
  
    def get_use_retry(self) -> bool:  
        return True  
  
    def get_retry_ttl(self) -> int:  
        return self.retry_sec  
  
    async def run_handler(  
            self,  
            message: dict,  
            request_id: Optional[str],  
            result_queue: Optional[str],  
            count_retry: Optional[int] = 0  
    ) -> bool:  
        if count_retry > self.retry_times:  
            self.logger.warning(f'Request {request_id} was rejected by excess attempts {self.retry_times} times')  
            return True  
  
        self.logger.info(f'Get request {request_id} for response {result_queue}')  
  
        client_data = RequestSerializer.parse_obj(message)  
  
        response = await self.service.get_client_inn(client_data)  
  
        if result_queue:  
            json_message = response.dict()  
            await self.rabbitmq_connection.send_data_by_queue(json_message, result_queue)  
  
        return True

class ClientDataModel(BaseModel):  
    created_at: datetime = Field(default_factory=datetime.utcnow)  
    request_id: str  
    first_name: str  
    last_name: str  
    middle_name: str  
    birth_date: datetime  
    birth_place: str = Field(default='')  
    passport_num: str  
    document_date: datetime  
    executed_at: Optional[datetime]  
    inn: Optional[str]  
    error: Optional[str]  
  
    @classmethod  
    def create_from_request(cls, request: RequestMqSerializer) -> 'ClientDataModel':  
        return ClientDataModel(  
            request_id=request.request_id,  
            first_name=request.first_name,  
            last_name=request.last_name,  
            middle_name=request.middle_name,  
            birth_date=datetime.combine(request.birth_date, datetime.min.time()),  
            passport_num='{} {}'.format(request.document_serial, request.document_number),  
            document_date=datetime.combine(request.document_date, datetime.min.time()),  
        )  
  
    @property  
    def elapsed_time(self) -> float:  
        end = self.executed_at or datetime.utcnow()  
        return (end - self.created_at).total_seconds()

class BaseRepository(StartupEventMixin):  
  
    def __init__(self, mongodb_connection_manager: MongoConnectionManager, setting: Settings) -> None:  
        self.mongodb_connection_manager = mongodb_connection_manager  
        self.db_name = setting.mongo_name  
  
    @property  
    def collection_name(self) -> str:  
        raise NotImplementedError  
  
    @property  
    def collection_indexes(self) -> Iterable[IndexDef]:  
        raise NotImplementedError  
  
    def startup(self) -> Coroutine:  
        return self.create_indexes()  
  
    async def create_index(self, field_name: str, sort_id: int) -> None:  
        connection = await self.mongodb_connection_manager.get_connection()  
        collection = connection[self.db_name][self.collection_name]  
        await collection.create_index([(field_name, sort_id), ], background=True)  
  
    async def create_indexes(self) -> None:  
        tasks = []  
        for index_item in self.collection_indexes:  
            tasks.append(self.create_index(index_item.name, index_item.sort))  
        asyncio.ensure_future(asyncio.gather(*tasks))  
  
    async def get_one_document(self, criteria: dict) -> Optional[dict]:  
        connection = await self.mongodb_connection_manager.get_connection()  
        collection = connection[self.db_name][self.collection_name]  
        return await collection.find_one(criteria)  
  
    async def get_list_document(  
            self,  
            criteria: dict,  
            sort_criteria: Optional[list] = None,  
            limit: Optional[int] = 0,  
            skip: Optional[int] = 0,  
    ) -> List[dict]:  
        if not sort_criteria:  
            sort_criteria = []  
        connection = await self.mongodb_connection_manager.get_connection()  
        cursor = connection[self.db_name][self.collection_name].find(  
            criteria,  
            limit=limit,  
            skip=skip,  
            sort=sort_criteria  
        )  
  
        result = list()  
        async for data in cursor:  
            result.append(data)  
        return result  
  
    async def save_document(self, data: dict) -> str:  
        connection = await self.mongodb_connection_manager.get_connection()  
        result = await connection[self.db_name][self.collection_name].insert_one(data)  
        return result.inserted_id  
  
    async def update_document(self, criteria: dict, data: dict) -> None:  
        connection = await self.mongodb_connection_manager.get_connection()  
        await connection[self.db_name][self.collection_name].update_one(criteria, {'$set': data})

class InnService:  
    def __init__(  
            self,  
            settings: Settings,  
            logger: AppLogger,  
            client: NalogApiClient,  
            storage: RequestRepository  
    ) -> None:  
        self.settings = settings  
        self.logger = logger  
        self.client = client  
        self.storage_repository = storage  
  
    async def get_client_inn_from_storage(self, client_data: RequestSerializer) -> Optional[RequestModel]:  
        client_passport = f'{client_data.document_serial} {client_data.document_number}'  
        client_request = await self.storage_repository.find_request(client_passport, client_data.request_id)  
        return client_request  
  
    def update_status(self, model: RequestModel, inn: str, error: str) -> None:  
        model.inn = inn  
        model.error = error  
  
    async def get_client_inn(self, client_data: RequestSerializer) -> RequestDTO:  
        """Получение клиентского ИНН"""  
        start_process = datetime.utcnow()  
        model = RequestModel.create_from_request(client_data)  
  
        # Получить данные из БД  
        existing_data = await self.get_client_inn_from_storage(client_data)  
        if existing_data:  
            elapsed_time = (datetime.utcnow() - start_process).total_seconds()  
            return RequestDTO(  
                request_id=client_data.request_id,  
                inn=existing_data.inn,  
                elapsed_time=elapsed_time,  
                cashed=True  
            )  
  
        # Сделать фактический запрос в Nalog API  
        request = NalogApiRequestSerializer.create_from_request(client_data)  
        error, result = None, ''  
        try:  
            result = await self.client.send_request_for_inn(request)  
        except NalogApiClientException as exception:  
            self.logger.error('Error request to Nalog api service', details=str(exception))  
            error = str(exception)  
  
        self.update_status(model, result, error)  
        await self.storage_repository.save_request(model)  
  
        return RequestDTO(  
            request_id=model.request_id,  
            inn=model.inn,  
            details=model.error,  
            elapsed_time=model.elapsed_time  
        )

class NalogApiClient:  
    CLIENT_EXCEPTIONS = (  
        NalogApiClientException,  
        aiohttp.ClientProxyConnectionError,  
        aiohttp.ServerTimeoutError,  
    )  
  
    def __init__(self, settings: Settings, logger: AppLogger):  
        self.nalog_api_service_url = settings.client_nalog_url  
        self.request_timeout = settings.client_nalog_timeout_sec  
        self.retries_times = settings.client_nalog_retries  
        self.retries_wait = settings.client_nalog_wait_sec  
        self.logger = logger  
        self.timeout = aiohttp.ClientTimeout(total=self.request_timeout)  
  
    @property  
    def _headers(self):  
        return {  
            "Accept": "application/json, text/javascript, */*; q=0.01",  
            "Accept-Language": "ru-RU,ru",  
            "Connection": "keep-alive",  
            "Origin": "https://service.nalog.ru",  
            "Referer": self.nalog_api_service_url,  
            "Sec-Fetch-Dest": "empty",  
            "Sec-Fetch-Mode": "cors",  
            "Sec-Fetch-Site": "same-origin",  
            "Sec-GPC": "1",  
            "X-Requested-With": "XMLHttpRequest",  
        }  
  
    async def send_request_for_inn(self, nalog_api_request: NalogApiRequestSerializer) -> Optional[str]:  
        self.logger.debug(f'Request to nalog api service for {nalog_api_request.client_fullname}')  
  
        form_data = nalog_api_request.dict(by_alias=True)  
  
        @retry(self.CLIENT_EXCEPTIONS, logger=self.logger, attempts=self.retries_times, wait_sec=self.retries_wait)  
        async def make_request(client_session: aiohttp.ClientSession):  
            async with client_session.post(url=self.nalog_api_service_url, data=form_data) as response:  
                if response.status not in [http.HTTPStatus.OK, http.HTTPStatus.NOT_FOUND]:  
                    response_text = await response.text()  
                    raise NalogApiClientException(response_text)  
                data = await response.json()  
                code = data.get('code')  
                captcha_required = data.get('captchaRequired')  
                if captcha_required:  
                    raise NalogApiClientException(f'Captcha required for request {nalog_api_request.client_fullname}')  
                if code == 0:  
                    return 'no inn'  
                elif code == 1:  
                    return data.get('inn')  
                else:  
                    raise NalogApiClientException(f'Unable to parse response! Details: {response}')  
  
        async with aiohttp.ClientSession(timeout=self.timeout, headers=self._headers) as session:  
            return await make_request(session)

class ContainerManager:  
  
    def __init__(self, cls_container: Type[Container]) -> None:  
        self._container = Injector(cls_container())  
        self._bindings = self._container.binder._bindings  
  
    def get_container(self) -> Injector:  
        return self._container  
  
    def get_live_probe_handlers(self) -> List[Type[Callable]]:  
        result = []  
        binding_collection = [binding for binding in self._bindings]  
        for binding in binding_collection:  
            if issubclass(binding, EventLiveProbeMixin):  
                binding_obj = self._container.get(binding)  
                result.append(binding_obj.is_connected)  
        return result  
  
    def get_startup_handlers(self):  
        handlers = []  
        binding_collection = [binding for binding in self._bindings]  
        for binding in binding_collection:  
            if issubclass(binding, StartupEventMixin):  
                binding_obj = self._container.get(binding)  
                handlers.append(binding_obj.startup())  
        return handlers  
  
    def get_shutdown_handlers(self):  
        handlers = []  
        binding_collection = [binding for binding in self._bindings]  
        for binding in binding_collection:  
            if issubclass(binding, ShutdownEventMixin):  
                binding_obj = self._container.get(binding)  
                handlers.append(binding_obj.shutdown())  
        return handlers  
  
    async def run_startup(self) -> None:  
        exception = None  
        for handler in self.get_startup_handlers():  
            if exception:  
                handler.close()  
            else:  
                try:  
                    await handler  
                except Exception as exc:  
                    exception = exc  
  
        if exception is not None:  
            raise exception  
  
    async def run_shutdown(self) -> None:  
        handlers = []  
        for handler in self.get_shutdown_handlers():  
            handlers.append(handler)  
        await asyncio.gather(*handlers)

class ApplicationContainer(Container):  
  
    @singleton  
    @provider    
    def provide_settings(self) -> Settings:  
        return Settings()  
  
	# ... немного кода пропущено

    @singleton  
    @provider    
    def provide_mongodb_connection(self, settings: Settings, logger: AppLogger) -> MongoConnectionManager:  
        return MongoConnectionManager(settings, logger)  
  
    @singleton  
    @provider    
    def provide_rabbitmq_connection(self, settings: Settings, logger: AppLogger) -> RabbitConnectionManager:  
        return RabbitConnectionManager(settings, logger)  
  
    @singleton  
    @provider    
    def provide_nalog_api_client(self, settings: Settings, logger: AppLogger) -> NalogApiClient:  
        return NalogApiClient(settings, logger)  
  
    @singleton  
    @provider    
    def provide_request_repository(self, settings: Settings, mongo_connection: MongoConnectionManager) -> RequestRepository:  
        return RequestRepository(mongo_connection, settings)

class Application:  
  
    def __init__(self, cls_container: Type[Container]) -> None:  
        self.loop = asyncio.get_event_loop()  
        self.container_manager = ContainerManager(cls_container)  
        self.container = self.container_manager.get_container()  
        self.settings = self.container.get(Settings)  
        self.logger = self.container.get(AppLogger)  
        self.live_probe_service = self.container.get(LiveProbeService)  
        self.queue_manager = self.container.get(QueueManager)  
        self.app_name = self.settings.app_name  
        self.http_server = None  
  
    def init_application(self):  
        self.http_server = ServerAPIManager(self.container)  
  
        request_handler = self.container.get(RequestHandler)  
        self.queue_manager.add_handler(request_handler)  
  
        live_probe_handlers = self.container_manager.get_live_probe_handlers()  
        for handler in live_probe_handlers:  
            self.live_probe_service.add_component(handler)  
  
    def run(self) -> None:  
        self.logger.info(f'Starting application {self.app_name}')  
  
        self.init_application()  
  
        try:  
            self.loop.run_until_complete(self.container_manager.run_startup())  
  
            tasks = asyncio.gather(  
                self.http_server.serve(),  
                self.queue_manager.run_handlers_async(),  
            )  
            self.loop.run_until_complete(tasks)  
  
            self.loop.run_forever()  
        except BaseException as exception:  
            exit(1)  
        finally:  
            self.loop.run_until_complete(self.container_manager.run_shutdown())  
  
            self.loop.close()  
            self.logger.info('Application disabled')

import typer  
from core.application import Application  
from app_container import ApplicationContainer  
  
  
def main():  
    try:  
        application = Application(ApplicationContainer)  
        application.run()  
    except BaseException as exc:  
        typer.echo(f'Error starting application. Details: {str(exc)}')  
  
  
if __name__ == "__main__":  
    typer.run(main)