Check used port, fix #985.

openslides/utils/main.py

@@ -23,6 +23,10 @@ class PortableDirNotWritable(Exception):
     pass
 
 
+class PortIsBlockedError(Exception):
+    pass
+
+
 class DatabaseInSettingsError(Exception):
     pass
 
@@ -273,22 +277,27 @@ def get_portable_paths(name):
 
 def get_port(address, port):
     """
-    Returns the port for the server. If port 80 is given, checks if it is
-    available. If not returns port 8000.
+    Checks if the port for the server is available and returns it the port. If
+    it is port 80, try also port 8000.
 
     The argument 'address' should be an IP address. The argument 'port' should
     be an integer.
     """
-    if port == 80:
-        # test if we can use port 80
-        s = socket.socket()
-        try:
-            s.bind((address, port))
-            s.listen(-1)
-        except socket.error:
-            port = 8000
-        finally:
-            s.close()
+    s = socket.socket()
+    try:
+        s.bind((address, port))
+        s.listen(-1)
+    except socket.error:
+        error = True
+    else:
+        error = False
+    finally:
+        s.close()
+    if error:
+        if port == 80:
+            port = get_port(address, 8000)
+        else:
+            raise PortIsBlockedError('Port %d is not available. Try another port using the --port option.' % port)
     return port
 
 

tests/utils/test_main.py

@@ -20,6 +20,7 @@ from openslides.utils.main import (
     get_port,
     get_portable_paths,
     get_user_data_path_values,
+    PortIsBlockedError,
     setup_django_settings_module,
     start_browser,
     UNIX_VERSION,
@@ -71,11 +72,19 @@ class TestFunctions(TestCase):
     def test_get_port(self):
         class MyException(Exception):
             pass
+
+        def block_some_ports(mock):
+            if not 8000 == mock_socket.socket().bind.call_args[0][0][1]:
+                raise MyException
+
+        # Test open port
         self.assertEqual(get_port('localhost', 8234), 8234)
+        # Test blocked ports
         with patch('openslides.utils.main.socket') as mock_socket:
             mock_socket.error = MyException
-            mock_socket.socket().listen = MagicMock(side_effect=MyException)
+            mock_socket.socket().listen = MagicMock(side_effect=block_some_ports)
             self.assertEqual(get_port('localhost', 80), 8000)
+            self.assertRaises(PortIsBlockedError, get_port, 'localhost', 81)
 
     @patch('openslides.utils.main.threading.Thread')
     @patch('openslides.utils.main.time')
@@ -121,9 +130,11 @@ class TestOtherFunctions(TestCase):
         mock_syncdb.assert_called()
         mock_runserver.assert_called_with(None, mock_args)
 
+    @patch('openslides.__main__.get_port')
     @patch('openslides.__main__.run_tornado')
     @patch('openslides.__main__.start_browser')
-    def test_runserver(self, mock_start_browser, mock_run_tornado):
+    def test_runserver(self, mock_start_browser, mock_run_tornado, mock_get_port):
+        mock_get_port.return_value = 8000
         mock_args = MagicMock()
         runserver(settings=None, args=mock_args)
         mock_run_tornado.assert_called()