API for reloading server config

gns3server/config.py

@@ -98,28 +98,15 @@ class Config(object):
         self.read_config()
         self._cloud_config = configparser.ConfigParser()
         self.read_cloud_config()
-        self._watch_config_file()
 
-    def _watch_config_file(self):
-        asyncio.get_event_loop().call_later(1, self._check_config_file_change)
-
-    def _check_config_file_change(self):
+    def reload(self):
         """
-        Check if configuration file has changed on the disk
+        Reload configuration
         """
 
-        changed = False
-        for file in self._watched_files:
-            try:
-                if os.stat(file).st_mtime != self._watched_files[file]:
-                    changed = True
-            except OSError:
-                continue
-        if changed:
-            self.read_config()
+        self.read_config()
         for section in self._override_config:
             self.set_section_config(section, self._override_config[section])
-        self._watch_config_file()
 
     def list_cloud_config_file(self):
         return self._cloud_file

gns3server/handlers/__init__.py

@@ -25,6 +25,7 @@ from gns3server.handlers.api.dynamips_vm_handler import DynamipsVMHandler
 from gns3server.handlers.api.qemu_handler import QEMUHandler
 from gns3server.handlers.api.virtualbox_handler import VirtualBoxHandler
 from gns3server.handlers.api.vpcs_handler import VPCSHandler
+from gns3server.handlers.api.config_handler import ConfigHandler
 from gns3server.handlers.upload_handler import UploadHandler
 
 if sys.platform.startswith("linux") or hasattr(sys, "_called_from_test"):

gns3server/handlers/api/config_handler.py

@@ -0,0 +1,41 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2015 GNS3 Technologies Inc.
+#
+# 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/>.
+
+from ...web.route import Route
+from ...config import Config
+from aiohttp.web import HTTPForbidden
+
+import asyncio
+
+
+class ConfigHandler:
+
+    @classmethod
+    @Route.post(
+        r"/config/reload",
+        description="Check if version is the same as the server",
+        status_codes={
+            201: "Config reload",
+            403: "Config reload refused"
+        })
+    def reload(request, response):
+
+        config = Config.instance()
+        if config.get_section_config("Server").getboolean("local", False) is False:
+            raise HTTPForbidden(text="You can only reload the configuration for a local server")
+        config.reload()
+        response.set_status(201)

tests/handlers/api/test_config.py

@@ -0,0 +1,48 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2015 GNS3 Technologies Inc.
+#
+# 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/>.
+
+from configparser import ConfigParser
+from unittest.mock import patch, MagicMock
+
+
+def test_reload_accepted(server):
+
+    gns_config = MagicMock()
+    config = ConfigParser()
+    config.add_section("Server")
+    config.set("Server", "local", "true")
+    gns_config.get_section_config.return_value = config["Server"]
+
+    with patch("gns3server.config.Config.instance", return_value=gns_config):
+        response = server.post('/config/reload', example=True)
+
+    assert response.status == 201
+    assert gns_config.reload.called
+
+
+def test_reload_forbidden(server):
+
+    gns_config = MagicMock()
+    config = ConfigParser()
+    config.add_section("Server")
+    config.set("Server", "local", "false")
+    gns_config.get_section_config.return_value = config["Server"]
+
+    with patch("gns3server.config.Config.instance", return_value=gns_config):
+        response = server.post('/config/reload')
+
+    assert response.status == 403

tests/test_config.py

@@ -77,7 +77,7 @@ def test_set_section_config(tmpdir):
     assert dict(config.get_section_config("Server")) == {"host": "192.168.1.1"}
 
 
-def test_check_config_file_change(tmpdir):
+def test_reload(tmpdir):
 
     config = load_config(tmpdir, {
         "Server": {
@@ -91,13 +91,12 @@ def test_check_config_file_change(tmpdir):
             "host": "192.168.1.1"
         }
     })
-    os.utime(path, (time.time() + 1, time.time() + 1))
 
-    config._check_config_file_change()
+    config.reload()
     assert dict(config.get_section_config("Server")) == {"host": "192.168.1.1"}
 
 
-def test_check_config_file_change_override_cmdline(tmpdir):
+def test_reload(tmpdir):
 
     config = load_config(tmpdir, {
         "Server": {
@@ -114,7 +113,6 @@ def test_check_config_file_change_override_cmdline(tmpdir):
             "host": "192.168.1.2"
         }
     })
-    os.utime(path, (time.time() + 1, time.time() + 1))
 
-    config._check_config_file_change()
+    config.reload()
     assert dict(config.get_section_config("Server")) == {"host": "192.168.1.1"}