Add: notification service

1 files changed, 125 insertions, 0 deletions

diff --git a/notification_service.py b/notification_service.py
new file mode 100644
index 0000000..002650d
--- /dev/null
+++ b/notification_service.py
@@ -0,0 +1,125 @@
+#!/usr/bin/python3
+# Copyright (C) 2018  Lars Wirzenius
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# 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 Affero 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/>.
+
+
+import logging
+import logging.handlers
+import os
+import sys
+
+
+import apifw
+import slog
+import yaml
+
+
+import ick2
+
+
+transactions = slog.Counter()
+
+
+def counter():
+    return 'HTTP transaction {}'.format(transactions.increment())
+
+
+def dict_logger(log, stack_info=None):
+    ick2.log.log(exc_info=stack_info, **log)
+
+
+default_config = {
+    'token-public-key': None,
+    'token-audience': None,
+    'token-issuer': None,
+    'log': [],
+    'from_addr': None,
+    'smtp_server': None,
+    'smtp_port': None,
+    'smtp_user': None,
+    'smtp_password': None
+}
+
+
+def load_config(filename, defconf):
+    conf = yaml.safe_load(open(filename, 'r'))
+    actual_config = dict(defconf)
+    actual_config.update(conf)
+    return actual_config
+
+
+def check_config(config, musthave):
+    for key in config:
+        if key not in musthave:
+            raise Exception('Config %s is not known' % key)
+    for key in musthave:
+        if config.get(key) is None:
+            raise Exception('Config %s must not be None' % key)
+
+
+def main():
+    logger = logging.getLogger()
+    logger.setLevel(logging.DEBUG)
+    handler = logging.StreamHandler(sys.stderr)
+    logger.addHandler(handler)
+    logging.info('Starting notification service')
+
+    try:
+
+        name = 'NOTIFICATION_SERVICE_CONFIG'
+        config_filename = os.environ.get(name)
+        logging.info('config filename %r', config_filename)
+        if not config_filename:
+            msg = 'No %s defined in environment' % name
+            logging.error(msg)
+            raise Exception(msg)
+
+        logging.info('reading config from %r', config_filename)
+        config = load_config(config_filename, default_config)
+
+        logging.info('config is %r', config)
+        ick2.setup_logging(config)
+        check_config(config, default_config)
+
+        ick2.log.log(
+            'info', msg_text='Notification service starts', config=config)
+
+        api = ick2.NotificationAPI(config)
+        ick2.log.log('info', msg_text='created NotificationAPI')
+
+        application = apifw.create_bottle_application(
+            api, counter, dict_logger, config)
+        ick2.log.log('info', msg_text='called apifw.create_bottle_application')
+
+        return application
+    except SystemExit:
+        raise
+    except BaseException as e:
+        logging.error(str(e))
+        ick2.log.log(
+            'error', msg_text='Uncaught  exception', exception=str(e),
+            exc_info=True)
+        sys.exit(1)
+
+
+app = main()
+
+# If we are running this program directly with Python, and not via
+# gunicorn, we can use the Bottle built-in debug server, which can
+# make some things easier to debug.
+
+if __name__ == '__main__':
+    print('running in debug mode')
+    app.run(host='127.0.0.1', port=12767)