exc_tracker: also check for smtp_server before doing heavy lifting of exception email sending

rhodecode/lib/exc_tracking.py

@@ -1,220 +1,222 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2019 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/
 
 import os
 import time
 import datetime
 import msgpack
 import logging
 import traceback
 import tempfile
 import glob
 
 log = logging.getLogger(__name__)
 
 # NOTE: Any changes should be synced with exc_tracking at vcsserver.lib.exc_tracking
 global_prefix = 'rhodecode'
 exc_store_dir_name = 'rc_exception_store_v1'
 
 
 def exc_serialize(exc_id, tb, exc_type):
 
     data = {
         'version': 'v1',
         'exc_id': exc_id,
         'exc_utc_date': datetime.datetime.utcnow().isoformat(),
         'exc_timestamp': repr(time.time()),
         'exc_message': tb,
         'exc_type': exc_type,
     }
     return msgpack.packb(data), data
 
 
 def exc_unserialize(tb):
     return msgpack.unpackb(tb)
 
 _exc_store = None
 
 
 def get_exc_store():
     """
     Get and create exception store if it's not existing
     """
     global _exc_store
     import rhodecode as app
 
     if _exc_store is not None:
         # quick global cache
         return _exc_store
 
     exc_store_dir = app.CONFIG.get('exception_tracker.store_path', '') or tempfile.gettempdir()
     _exc_store_path = os.path.join(exc_store_dir, exc_store_dir_name)
 
     _exc_store_path = os.path.abspath(_exc_store_path)
     if not os.path.isdir(_exc_store_path):
         os.makedirs(_exc_store_path)
         log.debug('Initializing exceptions store at %s', _exc_store_path)
         _exc_store = _exc_store_path
 
     return _exc_store_path
 
 
 def _store_exception(exc_id, exc_type_name, exc_traceback, prefix, send_email=None):
     """
     Low level function to store exception in the exception tracker
     """
     import rhodecode as app
 
     exc_store_path = get_exc_store()
     exc_data, org_data = exc_serialize(exc_id, exc_traceback, exc_type_name)
     exc_pref_id = '{}_{}_{}'.format(exc_id, prefix, org_data['exc_timestamp'])
     if not os.path.isdir(exc_store_path):
         os.makedirs(exc_store_path)
     stored_exc_path = os.path.join(exc_store_path, exc_pref_id)
     with open(stored_exc_path, 'wb') as f:
         f.write(exc_data)
     log.debug('Stored generated exception %s as: %s', exc_id, stored_exc_path)
 
     if send_email is None:
         # NOTE(marcink): read app config unless we specify explicitly
         send_email = app.CONFIG.get('exception_tracker.send_email', False)
+        mail_server = app.CONFIG.get('smtp_server') or None
+        send_email = send_email and mail_server
 
     if send_email:
         try:
             send_exc_email(exc_id, exc_type_name)
         except Exception:
             log.exception('Failed to send exception email')
             pass
 
 
 def send_exc_email(exc_id, exc_type_name):
     import rhodecode as app
     from pyramid.threadlocal import get_current_request
     from rhodecode.apps._base import TemplateArgs
     from rhodecode.lib.utils2 import aslist
     from rhodecode.lib.celerylib import run_task, tasks
     from rhodecode.lib.base import attach_context_attributes
     from rhodecode.model.notification import EmailNotificationModel
 
     request = get_current_request()
 
     recipients = aslist(app.CONFIG.get('exception_tracker.send_email_recipients', ''))
     log.debug('Sending Email exception to: `%s`', recipients or 'all super admins')
 
     # NOTE(marcink): needed for email template rendering
     user_id = None
     if request:
         user_id = request.user.user_id
     attach_context_attributes(TemplateArgs(), request, user_id=user_id, is_api=True)
 
     email_kwargs = {
         'email_prefix': app.CONFIG.get('exception_tracker.email_prefix', '') or '[RHODECODE ERROR]',
         'exc_url': request.route_url('admin_settings_exception_tracker_show', exception_id=exc_id),
         'exc_id': exc_id,
         'exc_type_name': exc_type_name,
         'exc_traceback': read_exception(exc_id, prefix=None),
     }
 
     (subject, headers, email_body,
      email_body_plaintext) = EmailNotificationModel().render_email(
         EmailNotificationModel.TYPE_EMAIL_EXCEPTION, **email_kwargs)
 
     run_task(tasks.send_email, recipients, subject,
              email_body_plaintext, email_body)
 
 
 def _prepare_exception(exc_info):
     exc_type, exc_value, exc_traceback = exc_info
     exc_type_name = exc_type.__name__
 
     tb = ''.join(traceback.format_exception(
         exc_type, exc_value, exc_traceback, None))
 
     return exc_type_name, tb
 
 
 def store_exception(exc_id, exc_info, prefix=global_prefix):
     """
     Example usage::
 
         exc_info = sys.exc_info()
         store_exception(id(exc_info), exc_info)
     """
 
     try:
         exc_type_name, exc_traceback = _prepare_exception(exc_info)
         _store_exception(exc_id=exc_id, exc_type_name=exc_type_name,
                          exc_traceback=exc_traceback, prefix=prefix)
         return exc_id, exc_type_name
     except Exception:
         log.exception('Failed to store exception `%s` information', exc_id)
         # there's no way this can fail, it will crash server badly if it does.
         pass
 
 
 def _find_exc_file(exc_id, prefix=global_prefix):
     exc_store_path = get_exc_store()
     if prefix:
         exc_id = '{}_{}'.format(exc_id, prefix)
     else:
         # search without a prefix
         exc_id = '{}'.format(exc_id)
 
     found_exc_id = None
     matches = glob.glob(os.path.join(exc_store_path, exc_id) + '*')
     if matches:
         found_exc_id = matches[0]
 
     return found_exc_id
 
 
 def _read_exception(exc_id, prefix):
     exc_id_file_path = _find_exc_file(exc_id=exc_id, prefix=prefix)
     if exc_id_file_path:
         with open(exc_id_file_path, 'rb') as f:
             return exc_unserialize(f.read())
     else:
         log.debug('Exception File `%s` not found', exc_id_file_path)
     return None
 
 
 def read_exception(exc_id, prefix=global_prefix):
     try:
         return _read_exception(exc_id=exc_id, prefix=prefix)
     except Exception:
         log.exception('Failed to read exception `%s` information', exc_id)
         # there's no way this can fail, it will crash server badly if it does.
     return None
 
 
 def delete_exception(exc_id, prefix=global_prefix):
     try:
         exc_id_file_path = _find_exc_file(exc_id, prefix=prefix)
         if exc_id_file_path:
             os.remove(exc_id_file_path)
 
     except Exception:
         log.exception('Failed to remove exception `%s` information', exc_id)
         # there's no way this can fail, it will crash server badly if it does.
         pass
 
 
 def generate_id():
     return id(object())