very common exceptions

kvmd/apps/kvmd/server.py

@@ -42,16 +42,13 @@ import setproctitle
 
 from ...logging import get_logger
 
+from ...errors import OperationError
+from ...errors import IsBusyError
+
 from ...plugins import BasePlugin
 
 from ...plugins.hid import BaseHid
-
-from ...plugins.atx import AtxOperationError
-from ...plugins.atx import AtxIsBusyError
 from ...plugins.atx import BaseAtx
-
-from ...plugins.msd import MsdOperationError
-from ...plugins.msd import MsdIsBusyError
 from ...plugins.msd import BaseMsd
 
 from ...validators import ValidatorError
@@ -71,8 +68,6 @@ from .auth import AuthManager
 from .info import InfoManager
 from .logreader import LogReader
 from .streamer import Streamer
-
-from .wol import WolDisabledError
 from .wol import WakeOnLan
 
 from .http import UnauthorizedError
@@ -337,9 +332,9 @@ class KvmdServer(HttpServer):  # pylint: disable=too-many-arguments,too-many-ins
 
                 return (await exposed.handler(request))
 
-            except (AtxIsBusyError, MsdIsBusyError) as err:
+            except IsBusyError as err:
                 return make_json_exception(err, 409)
-            except (ValidatorError, AtxOperationError, MsdOperationError, WolDisabledError) as err:
+            except (ValidatorError, OperationError) as err:
                 return make_json_exception(err, 400)
             except UnauthorizedError as err:
                 return make_json_exception(err, 401)

kvmd/apps/kvmd/wol.py

@@ -27,11 +27,13 @@ from typing import Optional
 
 from ...logging import get_logger
 
+from ...errors import OperationError
+
 from ... import aiotools
 
 
 # =====
-class WolDisabledError(Exception):
+class WolDisabledError(OperationError):
     def __init__(self) -> None:
         super().__init__("WoL is disabled")
 

kvmd/errors.py

@@ -0,0 +1,28 @@
+# ========================================================================== #
+#                                                                            #
+#    KVMD - The main Pi-KVM daemon.                                          #
+#                                                                            #
+#    Copyright (C) 2018  Maxim Devaev <mdevaev@gmail.com>                    #
+#                                                                            #
+#    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 <https://www.gnu.org/licenses/>.  #
+#                                                                            #
+# ========================================================================== #
+
+
+class OperationError(Exception):
+    pass
+
+
+class IsBusyError(Exception):
+    pass

kvmd/plugins/atx/__init__.py

@@ -24,6 +24,9 @@ from typing import Dict
 from typing import AsyncGenerator
 from typing import Type
 
+from ...errors import OperationError
+from ...errors import IsBusyError
+
 from .. import BasePlugin
 from .. import get_plugin_class
 
@@ -33,11 +36,11 @@ class AtxError(Exception):
     pass
 
 
-class AtxOperationError(AtxError):
+class AtxOperationError(OperationError, AtxError):
     pass
 
 
-class AtxIsBusyError(AtxOperationError):
+class AtxIsBusyError(IsBusyError, AtxError):
     def __init__(self) -> None:
         super().__init__("Performing another ATX operation, please try again later")
 

kvmd/plugins/msd/__init__.py

@@ -27,6 +27,9 @@ from typing import Type
 from typing import AsyncGenerator
 from typing import Optional
 
+from ...errors import OperationError
+from ...errors import IsBusyError
+
 from .. import BasePlugin
 from .. import get_plugin_class
 
@@ -36,10 +39,15 @@ class MsdError(Exception):
     pass
 
 
-class MsdOperationError(MsdError):
+class MsdOperationError(OperationError, MsdError):
     pass
 
 
+class MsdIsBusyError(IsBusyError, MsdError):
+    def __init__(self) -> None:
+        super().__init__("Performing another MSD operation, please try again later")
+
+
 class MsdOfflineError(MsdOperationError):
     def __init__(self) -> None:
         super().__init__("MSD is not found")
@@ -70,11 +78,6 @@ class MsdImageExistsError(MsdOperationError):
         super().__init__("This image is already exists")
 
 
-class MsdIsBusyError(MsdOperationError):
-    def __init__(self) -> None:
-        super().__init__("Performing another MSD operation, please try again later")
-
-
 class MsdMultiNotSupported(MsdOperationError):
     def __init__(self) -> None:
         super().__init__("This MSD does not support storing multiple images")

kvmd/plugins/msd/otg/__init__.py

@@ -48,13 +48,13 @@ from .... import aiotools
 from .... import aioregion
 
 from .. import MsdError
+from .. import MsdIsBusyError
 from .. import MsdOfflineError
 from .. import MsdConnectedError
 from .. import MsdDisconnectedError
 from .. import MsdImageNotSelected
 from .. import MsdUnknownImageError
 from .. import MsdImageExistsError
-from .. import MsdIsBusyError
 from .. import BaseMsd
 
 from . import fs

kvmd/plugins/msd/relay.py

@@ -53,10 +53,10 @@ from ...validators.os import valid_abs_path
 from ...validators.hw import valid_gpio_pin
 
 from . import MsdError
+from . import MsdIsBusyError
 from . import MsdOfflineError
 from . import MsdConnectedError
 from . import MsdDisconnectedError
-from . import MsdIsBusyError
 from . import MsdMultiNotSupported
 from . import MsdCdromNotSupported
 from . import BaseMsd