mik-laj commented on a change in pull request #4891: Telegram hook/operator to
post messages to telegram channels
URL: https://github.com/apache/airflow/pull/4891#discussion_r264048350
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File path: airflow/contrib/hooks/telegram_hook.py
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@@ -0,0 +1,88 @@
+import telegram
+from time import sleep
+from airflow.hooks.base_hook import BaseHook
+from airflow.exceptions import AirflowException
+
+
+def telegram_retry(func, *args, **kwargs):
+ max_retries = kwargs.pop("max_retries", 5)
+ retry_sleep = kwargs.pop("retry_sleep", 0)
+ # perform request with retry
+ for retry in range(max_retries):
+ try:
+ return func(*args, **kwargs)
+ except (telegram.error.TimedOut,) as e:
+ if retry_sleep:
+ sleep(retry_sleep)
+
+
+class TelegramHook(BaseHook):
+ """
+ Interact with Telegram, using python-telegram-bot library.
+ """
+
+ def __init__(self, token=None, telegram_conn_id=None, chat_id=None):
+ """
+ Takes both telegram bot API token directly and connection that has
telegram bot API token.
+ If both supplied, telegram API token will be used.
+ :param token: telegram API token
+ :type token: str
+ :param telegram_conn_id: connection that has telegram API token in the
password field
+ :type telegram_conn_id: str
+ :param chat_id: Telegram public or private channel id (optional).
+ Check https://stackoverflow.com/a/33862907 to see how you can obtain
chat_id for private
+ channel
+ :type chat_id: str
+ """
+ self.token = self.__get_token(token, telegram_conn_id)
+ self.chat_id = self.__get_chat_id(chat_id, telegram_conn_id)
+
+ def __get_token(self, token, telegram_conn_id):
+ if token is not None:
+ return token
+ elif telegram_conn_id is not None:
+ conn = self.get_connection(telegram_conn_id)
+
+ if not getattr(conn, "password", None):
Review comment:
```suggestion
if not conn.password:
```
The connection always contains a password field. Sometimes it is only empty.
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