webhook: add possibility to use POST or GET methods for calling webhooks.

rhodecode/integrations/types/webhook.py

@@ -1,248 +1,265 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2012-2017 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 from __future__ import unicode_literals
 import string
 from collections import OrderedDict
 
 import deform
 import logging
 import requests
 import colander
 from celery.task import task
 from requests.packages.urllib3.util.retry import Retry
 
 from rhodecode import events
 from rhodecode.translation import _
 from rhodecode.integrations.types.base import IntegrationTypeBase
 
 log = logging.getLogger(__name__)
 
 # updating this required to update the `base_vars` passed in url calling func
 WEBHOOK_URL_VARS = [
     'repo_name',
     'repo_type',
     'repo_id',
     'repo_url',
 
     # special attrs below that we handle, using multi-call
     'branch',
     'commit_id',
 
     # pr events vars
     'pull_request_id',
     'pull_request_url',
 
 ]
 URL_VARS = ', '.join('${' + x + '}' for x in WEBHOOK_URL_VARS)
 
 
 class WebhookHandler(object):
     def __init__(self, template_url, secret_token):
         self.template_url = template_url
         self.secret_token = secret_token
 
     def get_base_parsed_template(self, data):
         """
         initially parses the passed in template with some common variables
         available on ALL calls
         """
         # note: make sure to update the `WEBHOOK_URL_VARS` if this changes
         common_vars = {
             'repo_name': data['repo']['repo_name'],
             'repo_type': data['repo']['repo_type'],
             'repo_id': data['repo']['repo_id'],
             'repo_url': data['repo']['url'],
         }
 
         return string.Template(
             self.template_url).safe_substitute(**common_vars)
 
     def repo_push_event_handler(self, event, data):
         url = self.get_base_parsed_template(data)
         url_cals = []
         branch_data = OrderedDict()
         for obj in data['push']['branches']:
             branch_data[obj['name']] = obj
 
         branches_commits = OrderedDict()
         for commit in data['push']['commits']:
             if commit['branch'] not in branches_commits:
                 branch_commits = {'branch': branch_data[commit['branch']],
                                   'commits': []}
                 branches_commits[commit['branch']] = branch_commits
 
             branch_commits = branches_commits[commit['branch']]
             branch_commits['commits'].append(commit)
 
         if '${branch}' in url:
             # call it multiple times, for each branch if used in variables
             for branch, commit_ids in branches_commits.items():
                 branch_url = string.Template(url).safe_substitute(branch=branch)
                 # call further down for each commit if used
                 if '${commit_id}' in branch_url:
                     for commit_data in commit_ids['commits']:
                         commit_id = commit_data['raw_id']
                         commit_url = string.Template(branch_url).safe_substitute(
                             commit_id=commit_id)
                         # register per-commit call
                         log.debug(
                             'register webhook call(%s) to url %s', event, commit_url)
                         url_cals.append((commit_url, self.secret_token, data))
 
                 else:
                     # register per-branch call
                     log.debug(
                         'register webhook call(%s) to url %s', event, branch_url)
                     url_cals.append((branch_url, self.secret_token, data))
 
         else:
             log.debug(
                 'register webhook call(%s) to url %s', event, url)
             url_cals.append((url, self.secret_token, data))
 
         return url_cals
 
     def repo_create_event_handler(self, event, data):
         url = self.get_base_parsed_template(data)
         log.debug(
             'register webhook call(%s) to url %s', event, url)
         return [(url, self.secret_token, data)]
 
     def pull_request_event_handler(self, event, data):
         url = self.get_base_parsed_template(data)
         log.debug(
             'register webhook call(%s) to url %s', event, url)
         url = string.Template(url).safe_substitute(
             pull_request_id=data['pullrequest']['pull_request_id'],
             pull_request_url=data['pullrequest']['url'])
         return [(url, self.secret_token, data)]
 
     def __call__(self, event, data):
         if isinstance(event, events.RepoPushEvent):
             return self.repo_push_event_handler(event, data)
         elif isinstance(event, events.RepoCreateEvent):
             return self.repo_create_event_handler(event, data)
         elif isinstance(event, events.PullRequestEvent):
             return self.pull_request_event_handler(event, data)
         else:
             raise ValueError('event type not supported: %s' % events)
 
 
 class WebhookSettingsSchema(colander.Schema):
     url = colander.SchemaNode(
         colander.String(),
         title=_('Webhook URL'),
         description=
             _('URL of the webhook to receive POST event. Following variables '
               'are allowed to be used: {vars}. Some of the variables would '
               'trigger multiple calls, like ${{branch}} or ${{commit_id}}. '
               'Webhook will be called as many times as unique objects in '
               'data in such cases.').format(vars=URL_VARS),
         missing=colander.required,
         required=True,
         validator=colander.url,
         widget=deform.widget.TextInputWidget(
             placeholder='https://www.example.com/webhook'
         ),
     )
     secret_token = colander.SchemaNode(
         colander.String(),
         title=_('Secret Token'),
         description=_('String used to validate received payloads.'),
         default='',
         missing='',
         widget=deform.widget.TextInputWidget(
             placeholder='secret_token'
         ),
     )
+    method_type = colander.SchemaNode(
+        colander.String(),
+        title=_('Call Method'),
+        description=_('Select if the webhook call should be made '
+                      'with POST or GET.'),
+        default='post',
+        missing='',
+        widget=deform.widget.RadioChoiceWidget(
+            values=[('get', 'GET'), ('post', 'POST')],
+            inline=True
+        ),
+    )
 
 
 class WebhookIntegrationType(IntegrationTypeBase):
     key = 'webhook'
     display_name = _('Webhook')
     description = _('Post json events to a webhook endpoint')
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     valid_events = [
         events.PullRequestCloseEvent,
         events.PullRequestMergeEvent,
         events.PullRequestUpdateEvent,
         events.PullRequestCommentEvent,
         events.PullRequestReviewEvent,
         events.PullRequestCreateEvent,
         events.RepoPushEvent,
         events.RepoCreateEvent,
     ]
 
     def settings_schema(self):
         schema = WebhookSettingsSchema()
         schema.add(colander.SchemaNode(
             colander.Set(),
             widget=deform.widget.CheckboxChoiceWidget(
                 values=sorted(
                     [(e.name, e.display_name) for e in self.valid_events]
                 )
             ),
             description="Events activated for this integration",
             name='events'
         ))
         return schema
 
     def send_event(self, event):
         log.debug('handling event %s with webhook integration %s',
             event.name, self)
 
         if event.__class__ not in self.valid_events:
             log.debug('event not valid: %r' % event)
             return
 
         if event.name not in self.settings['events']:
             log.debug('event ignored: %r' % event)
             return
 
         data = event.as_dict()
         template_url = self.settings['url']
 
         handler = WebhookHandler(template_url, self.settings['secret_token'])
         url_calls = handler(event, data)
         log.debug('webhook: calling following urls: %s',
                   [x[0] for x in url_calls])
-        post_to_webhook(url_calls)
+        post_to_webhook(url_calls, self.settings)
 
 
 @task(ignore_result=True)
-def post_to_webhook(url_calls):
+def post_to_webhook(url_calls, settings):
     max_retries = 3
     for url, token, data in url_calls:
         # retry max N times
         retries = Retry(
             total=max_retries,
             backoff_factor=0.15,
             status_forcelist=[500, 502, 503, 504])
         req_session = requests.Session()
         req_session.mount(
             'http://', requests.adapters.HTTPAdapter(max_retries=retries))
 
-        resp = req_session.post(url, json={
+        method = settings.get('method_type') or 'post'
+        call_method = getattr(req_session, method)
+
+        log.debug('calling WEBHOOK with method: %s', call_method)
+        resp = call_method(url, json={
             'token': token,
             'event': data
         })
+        log.debug('Got WEBHOOK response: %s', resp)
         resp.raise_for_status()  # raise exception on a failed request