Merge remote-tracking branch 'refs/remotes/ivan/feature/new-frontend-backend' into develop

1 files changed, 63 insertions, 0 deletions

diff --git a/src/leap/bitmask/backend_app.py b/src/leap/bitmask/backend_app.py
index e69de29b..5c0e4803 100644
--- a/src/leap/bitmask/backend_app.py
+++ b/src/leap/bitmask/backend_app.py
@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+# backend_app.py
+# Copyright (C) 2013, 2014 LEAP
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+Start point for the Backend.
+"""
+import logging
+import multiprocessing
+import signal
+
+from leap.bitmask.backend.leapbackend import LeapBackend
+from leap.bitmask.util import dict_to_flags
+
+logger = logging.getLogger(__name__)
+
+
+def signal_handler(signum, frame):
+    """
+    Signal handler that quits the running app cleanly.
+
+    :param signum: number of the signal received (e.g. SIGINT -> 2)
+    :type signum: int
+    :param frame: current stack frame
+    :type frame: frame or None
+    """
+    # Note: we don't stop the backend in here since the frontend signal handler
+    # will take care of that.
+    # In the future we may need to do the stop in here when the frontend and
+    # the backend are run separately (without multiprocessing)
+    pname = multiprocessing.current_process().name
+    logger.debug("{0}: SIGNAL #{1} catched.".format(pname, signum))
+
+
+def run_backend(bypass_checks, flags_dict):
+    """
+    Run the backend for the application.
+
+    :param bypass_checks: whether we should bypass the checks or not
+    :type bypass_checks: bool
+    :param flags_dict: a dict containing the flag values set on app start.
+    :type flags_dict: dict
+    """
+    # ignore SIGINT since app.py takes care of signaling SIGTERM to us.
+    signal.signal(signal.SIGINT, signal.SIG_IGN)
+    signal.signal(signal.SIGTERM, signal_handler)
+
+    dict_to_flags(flags_dict)
+
+    backend = LeapBackend(bypass_checks=bypass_checks)
+    backend.run()