Source code for airflow.contrib.hooks.slack_webhook_hook

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import json

from airflow.hooks.http_hook import HttpHook
from airflow.exceptions import AirflowException

[docs]class SlackWebhookHook(HttpHook): """ This hook allows you to post messages to Slack using incoming webhooks. Takes both Slack webhook token directly and connection that has Slack webhook token. If both supplied, http_conn_id will be used as base_url, and webhook_token will be taken as endpoint, the relative path of the url. Each Slack webhook token can be pre-configured to use a specific channel, username and icon. You can override these defaults in this hook. :param http_conn_id: connection that has Slack webhook token in the extra field :type http_conn_id: str :param webhook_token: Slack webhook token :type webhook_token: str :param message: The message you want to send on Slack :type message: str :param attachments: The attachments to send on Slack. Should be a list of dictionaries representing Slack attachments. :type attachments: list :param blocks: The blocks to send on Slack. Should be a list of dictionaries representing Slack blocks. :type blocks: list :param channel: The channel the message should be posted to :type channel: str :param username: The username to post to slack with :type username: str :param icon_emoji: The emoji to use as icon for the user posting to Slack :type icon_emoji: str :param icon_url: The icon image URL string to use in place of the default icon. :type icon_url: str :param link_names: Whether or not to find and link channel and usernames in your message :type link_names: bool :param proxy: Proxy to use to make the Slack webhook call :type proxy: str """ def __init__(self, http_conn_id=None, webhook_token=None, message="", attachments=None, blocks=None, channel=None, username=None, icon_emoji=None, icon_url=None, link_names=False, proxy=None, *args, **kwargs ): super(SlackWebhookHook, self).__init__(http_conn_id=http_conn_id, *args, **kwargs) self.webhook_token = self._get_token(webhook_token, http_conn_id) self.message = message self.attachments = attachments self.blocks = blocks = channel self.username = username self.icon_emoji = icon_emoji self.icon_url = icon_url self.link_names = link_names self.proxy = proxy
[docs] def _get_token(self, token, http_conn_id): """ Given either a manually set token or a conn_id, return the webhook_token to use. :param token: The manually provided token :type token: str :param http_conn_id: The conn_id provided :type http_conn_id: str :return: webhook_token to use :rtype: str """ if token: return token elif http_conn_id: conn = self.get_connection(http_conn_id) extra = conn.extra_dejson return extra.get('webhook_token', '') else: raise AirflowException('Cannot get token: No valid Slack '
'webhook token nor conn_id supplied')
[docs] def _build_slack_message(self): """ Construct the Slack message. All relevant parameters are combined here to a valid Slack json message. :return: Slack message to send :rtype: str """ cmd = {} if cmd['channel'] = if self.username: cmd['username'] = self.username if self.icon_emoji: cmd['icon_emoji'] = self.icon_emoji if self.icon_url: cmd['icon_url'] = self.icon_url if self.link_names: cmd['link_names'] = 1 if self.attachments: cmd['attachments'] = self.attachments if self.blocks: cmd['blocks'] = self.blocks cmd['text'] = self.message return json.dumps(cmd)
[docs] def execute(self): """ Remote Popen (actually execute the slack webhook call) """ proxies = {} if self.proxy: # we only need https proxy for Slack, as the endpoint is https proxies = {'https': self.proxy} slack_message = self._build_slack_message(), data=slack_message, headers={'Content-type': 'application/json'}, extra_options={'proxies': proxies})

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