Source code for airflow.contrib.hooks.discord_webhook_hook

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import json
import re

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

[docs]class DiscordWebhookHook(HttpHook): """ This hook allows you to post messages to Discord using incoming webhooks. Takes a Discord connection ID with a default relative webhook endpoint. The default endpoint can be overridden using the webhook_endpoint parameter ( Each Discord webhook can be pre-configured to use a specific username and avatar_url. You can override these defaults in this hook. :param http_conn_id: Http connection ID with host as "" and default webhook endpoint in the extra field in the form of {"webhook_endpoint": "webhooks/{}/{webhook.token}"} :type http_conn_id: str :param webhook_endpoint: Discord webhook endpoint in the form of "webhooks/{}/{webhook.token}" :type webhook_endpoint: str :param message: The message you want to send to your Discord channel (max 2000 characters) :type message: str :param username: Override the default username of the webhook :type username: str :param avatar_url: Override the default avatar of the webhook :type avatar_url: str :param tts: Is a text-to-speech message :type tts: bool :param proxy: Proxy to use to make the Discord webhook call :type proxy: str """ def __init__(self, http_conn_id=None, webhook_endpoint=None, message="", username=None, avatar_url=None, tts=False, proxy=None, *args, **kwargs): super(DiscordWebhookHook, self).__init__(*args, **kwargs) self.http_conn_id = http_conn_id self.webhook_endpoint = self._get_webhook_endpoint(http_conn_id, webhook_endpoint) self.message = message self.username = username self.avatar_url = avatar_url self.tts = tts self.proxy = proxy
[docs] def _get_webhook_endpoint(self, http_conn_id, webhook_endpoint): """ Given a Discord http_conn_id, return the default webhook endpoint or override if a webhook_endpoint is manually supplied. :param http_conn_id: The provided connection ID :param webhook_endpoint: The manually provided webhook endpoint :return: Webhook endpoint (str) to use """ if webhook_endpoint: endpoint = webhook_endpoint elif http_conn_id: conn = self.get_connection(http_conn_id) extra = conn.extra_dejson endpoint = extra.get('webhook_endpoint', '') else: raise AirflowException('Cannot get webhook endpoint: No valid Discord ' 'webhook endpoint or http_conn_id supplied.') # make sure endpoint matches the expected Discord webhook format if not re.match('^webhooks/[0-9]+/[a-zA-Z0-9_-]+$', endpoint): raise AirflowException('Expected Discord webhook endpoint in the form ' 'of "webhooks/{}/{webhook.token}".') return endpoint
[docs] def _build_discord_payload(self): """ Construct the Discord JSON payload. All relevant parameters are combined here to a valid Discord JSON payload. :return: Discord payload (str) to send """ payload = {} if self.username: payload['username'] = self.username if self.avatar_url: payload['avatar_url'] = self.avatar_url payload['tts'] = self.tts if len(self.message) <= 2000: payload['content'] = self.message else: raise AirflowException('Discord message length must be 2000 or fewer ' 'characters.') return json.dumps(payload)
[docs] def execute(self): """ Execute the Discord webhook call """ proxies = {} if self.proxy: # we only need https proxy for Discord proxies = {'https': self.proxy} discord_payload = self._build_discord_payload(), data=discord_payload, headers={'Content-type': 'application/json'}, extra_options={'proxies': proxies})

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