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103 lines
3.4 KiB
Python
103 lines
3.4 KiB
Python
import logging
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import requests
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from django.conf import settings
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from django_rq import job
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from jinja2.exceptions import TemplateError
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from .choices import ObjectChangeActionChoices
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from .conditions import ConditionSet
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from .webhooks import generate_signature
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logger = logging.getLogger('netbox.webhooks_worker')
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def eval_conditions(webhook, data):
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"""
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Test whether the given data meets the conditions of the webhook (if any). Return True
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if met or no conditions are specified.
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"""
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if not webhook.conditions:
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return True
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logger.debug(f'Evaluating webhook conditions: {webhook.conditions}')
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if ConditionSet(webhook.conditions).eval(data):
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return True
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return False
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@job('default')
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def process_webhook(webhook, model_name, event, data, snapshots, timestamp, username, request_id):
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"""
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Make a POST request to the defined Webhook
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"""
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# Evaluate webhook conditions (if any)
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if not eval_conditions(webhook, data):
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return
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# Prepare context data for headers & body templates
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context = {
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'event': dict(ObjectChangeActionChoices)[event].lower(),
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'timestamp': timestamp,
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'model': model_name,
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'username': username,
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'request_id': request_id,
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'data': data,
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'snapshots': snapshots,
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}
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# Build the headers for the HTTP request
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headers = {
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'Content-Type': webhook.http_content_type,
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}
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try:
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headers.update(webhook.render_headers(context))
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except (TemplateError, ValueError) as e:
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logger.error(f"Error parsing HTTP headers for webhook {webhook}: {e}")
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raise e
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# Render the request body
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try:
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body = webhook.render_body(context)
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except TemplateError as e:
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logger.error(f"Error rendering request body for webhook {webhook}: {e}")
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raise e
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# Prepare the HTTP request
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params = {
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'method': webhook.http_method,
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'url': webhook.render_payload_url(context),
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'headers': headers,
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'data': body.encode('utf8'),
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}
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logger.info(
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f"Sending {params['method']} request to {params['url']} ({context['model']} {context['event']})"
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)
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logger.debug(params)
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try:
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prepared_request = requests.Request(**params).prepare()
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except requests.exceptions.RequestException as e:
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logger.error(f"Error forming HTTP request: {e}")
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raise e
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# If a secret key is defined, sign the request with a hash of the key and its content
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if webhook.secret != '':
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prepared_request.headers['X-Hook-Signature'] = generate_signature(prepared_request.body, webhook.secret)
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# Send the request
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with requests.Session() as session:
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session.verify = webhook.ssl_verification
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if webhook.ca_file_path:
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session.verify = webhook.ca_file_path
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response = session.send(prepared_request, proxies=settings.HTTP_PROXIES)
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if 200 <= response.status_code <= 299:
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logger.info(f"Request succeeded; response status {response.status_code}")
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return f"Status {response.status_code} returned, webhook successfully processed."
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else:
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logger.warning(f"Request failed; response status {response.status_code}: {response.content}")
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raise requests.exceptions.RequestException(
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f"Status {response.status_code} returned with content '{response.content}', webhook FAILED to process."
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)
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