Blame webhook-server/pagure-webhook-server.py

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#!/usr/bin/env python
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"""
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 (c) 2015 - Copyright Red Hat Inc
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 Authors:
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   Pierre-Yves Chibon <pingou@pingoured.fr></pingou@pingoured.fr>
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This server listens to message sent via redis and send the corresponding
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web-hook request.
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Using this mechanism, we no longer block the main application if the
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receiving end is offline or so.
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"""
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import datetime
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import hashlib
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import hmac
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import json
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import logging
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import os
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import requests
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import time
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import uuid
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import six
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import trollius
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import trollius_redis
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from kitchen.text.converters import to_bytes
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log = logging.getLogger(__name__)
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if 'PAGURE_CONFIG' not in os.environ \
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        and os.path.exists('/etc/pagure/pagure.cfg'):
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    print 'Using configuration file `/etc/pagure/pagure.cfg`'
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    os.environ['PAGURE_CONFIG'] = '/etc/pagure/pagure.cfg'
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import pagure
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import pagure.lib
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from pagure.exceptions import PagureEvException
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_i = 0
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def call_web_hooks(project, topic, msg):
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    ''' Sends the web-hook notification. '''
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    log.info(
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        "Processing project: %s - topic: %s", project.fullname, topic)
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    log.debug('msg: %s', msg)
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    # Send web-hooks notification
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    global _i
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    _i += 1
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    year = datetime.datetime.now().year
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    if isinstance(topic, six.text_type):
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        topic = to_bytes(topic, encoding='utf8', nonstring="passthru")
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    msg['pagure_instance'] = pagure.APP.config['APP_URL']
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    msg['project_fullname'] = project.fullname
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    msg = dict(
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        topic=topic.decode('utf-8'),
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        msg=msg,
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        timestamp=int(time.time()),
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        msg_id=str(year) + '-' + str(uuid.uuid4()),
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        i=_i,
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    )
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    content = json.dumps(msg)
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    hashhex = hmac.new(
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        str(project.hook_token), content, hashlib.sha1).hexdigest()
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    hashhex256 = hmac.new(
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        str(project.hook_token), content, hashlib.sha256).hexdigest()
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    headers = {
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        'X-Pagure': pagure.APP.config['APP_URL'],
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        'X-Pagure-project': project.fullname,
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        'X-Pagure-Signature': hashhex,
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        'X-Pagure-Signature-256': hashhex256,
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        'X-Pagure-Topic': topic,
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    }
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    msg = json.dumps(msg)
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    for url in project.settings.get('Web-hooks').split('\n'):
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        url = url.strip()
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        log.info('Calling url %s' % url)
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        try:
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            req = requests.post(
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                url,
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                headers=headers,
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                data={'payload': msg}
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            )
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            if not req:
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                log.info(
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                    'An error occured while querying: %s - '
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                    'Error code: %s' % (url, req.status_code))
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        except (requests.exceptions.RequestException, Exception) as err:
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            log.info(
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                'An error occured while querying: %s - Error: %s' % (
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                    url, err))
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@trollius.coroutine
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def handle_messages():
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        connection = yield trollius.From(trollius_redis.Connection.create(
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            host='0.0.0.0', port=6379, db=0))
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        # Create subscriber.
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        subscriber = yield trollius.From(connection.start_subscribe())
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        # Subscribe to channel.
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        yield trollius.From(subscriber.subscribe(['pagure.hook']))
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        # Inside a while loop, wait for incoming events.
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        while True:
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            reply = yield trollius.From(subscriber.next_published())
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            log.info(
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                'Received: %s on channel: %s',
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                repr(reply.value), reply.channel)
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            data = json.loads(reply.value)
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            username = None
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            if data['project'].startswith('forks'):
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                username, projectname = data['project'].split('/', 1)
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            else:
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                projectname = data['project']
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            namespace = None
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            if '/' in projectname:
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                namespace, projectname = projectname.split('/', 1)
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            session = pagure.lib.create_session(pagure.APP.config['DB_URL'])
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            project = pagure.lib.get_project(
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                session=session, name=projectname, user=username)
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            session.close()
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            log.info('Got the project, going to the webhooks')
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            call_web_hooks(project, data['topic'], data['msg'])
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def main():
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    server = None
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    try:
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        loop = trollius.get_event_loop()
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        tasks = [
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            trollius.async(handle_messages()),
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        ]
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        loop.run_until_complete(trollius.wait(tasks))
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        loop.run_forever()
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    except KeyboardInterrupt:
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        pass
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    except trollius.ConnectionResetError:
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        pass
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    log.info("End Connection")
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    loop.close()
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    log.info("End")
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if __name__ == '__main__':
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    log = logging.getLogger("")
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    formatter = logging.Formatter(
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        "%(asctime)s %(levelname)s [%(module)s:%(lineno)d] %(message)s")
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    # setup console logging
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    log.setLevel(logging.DEBUG)
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    ch = logging.StreamHandler()
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    ch.setLevel(logging.DEBUG)
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    aslog = logging.getLogger("asyncio")
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    aslog.setLevel(logging.DEBUG)
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    ch.setFormatter(formatter)
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    log.addHandler(ch)
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    main()