Lesen von Desktop-Benachrichtigungen über die Befehlszeile. Debian/Ubuntu ⇐ Python

[Anonymous]

Läuft Ubuntu 24.04lts.

Ich versuche, ein Skript zu erstellen, das die Desktop-Benachrichtigungen von dbus abhört und den Absender und die Nachricht in der Befehlszeile ausgibt. Das Endziel besteht darin, eine bestimmte Funktion auszuführen, wenn ich eine bestimmte Benachrichtigung erhalte.
Ich habe versucht, dbus-monitor --session zu verwenden, das Dinge ausdruckt, wenn ich eine Benachrichtigung erhalte, aber ich sehe die eigentliche Benachrichtigung nicht. Gemini AI hat mir beim Schreiben von Python-Code geholfen. Dieser Code wird ausgeführt, aber es passiert nichts, wenn ich eine Benachrichtigung erhalte.

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import asyncio

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from dbus_next.aio import MessageBus

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from dbus_next.constants import BusType, MessageType

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from dbus_next import Message, Variant

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import logging

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# Set up basic logging

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# Note: We are only using INFO level for connection status, 

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# message processing is handled via print() for clarity.

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logging.basicConfig(level=logging.INFO, format='%(levelname)s: %(message)s')

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# --- DBus Interface Constants ---

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# The D-Bus service name for notifications

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NOTIF_SERVICE = 'org.freedesktop.Notifications'

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# The D-Bus object path for notifications

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NOTIF_PATH = '/org/freedesktop/Notifications'

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# The D-Bus interface for notifications

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NOTIF_INTERFACE = NOTIF_SERVICE

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# ANSI escape codes for bold text

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BOLD_START = '\033[1m'

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BOLD_END = '\033[0m'

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def message_handler(message):

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    """

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   Generic handler for D-Bus messages, focusing only on new notifications

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    (Notify method calls) and printing the sender, summary, and message body.

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    """

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    if message.interface == NOTIF_INTERFACE:

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        # --- Handle New Notification (Method Call) ---

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        if message.message_type == MessageType.METHOD_CALL and message.member == 'Notify':

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            # Notify arguments: (app_name, replaces_id, app_icon, summary, body, actions, hints, expire_timeout)

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            # Ensure we have enough arguments (at least app_name and body)

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            if len(message.body) >= 8:

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                app_name = message.body[0] # App Name (Sender)

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                summary = message.body[3] # Notification Summary (Title)

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                body_text = message.body[4] # Notification Body (Main message)

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                # Combine summary and body for the message

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                # If both exist, use "Summary: Body". If only one exists, use that.

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                if summary and body_text:

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                    message_content = f"{summary}: {body_text}"

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                elif summary:

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                    message_content = summary

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                else:

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                    message_content = body_text

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                output = f"[{app_name}] {message_content}"

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                # Apply bold formatting if the sender is Discord (case-insensitive check)

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                if app_name.lower() == 'discord':

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                    output = f"{BOLD_START}{output}{BOLD_END}"

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                print(output)

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        # Log other relevant messages (like replies to GetCapabilities)

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        else:

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            logging.debug(f"[D-Bus Message] Type: {message.message_type.name}, Member: {message.member}, Body: {message.body}")

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async def notification_listener(bus):

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    """

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   Configures the bus to listen for all messages related to the

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    org.freedesktop.Notifications interface.

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    """

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    # 1.  Add the generic message handler

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    bus.add_message_handler(message_handler)

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    # 2. Use AddMatch to filter messages directed to this interface

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    # This is crucial for catching the 'Notify' method call.

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   # The rule is updated to match on the specific method call ('Notify') rather than

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   # relying solely on the destination service, which is a more robust way to capture

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    # new notification requests.

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    match_rule = f"type='method_call', interface='{NOTIF_INTERFACE}', member='Notify'"

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    await bus.call(

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        Message(

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            destination='org.freedesktop.DBus',

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            path='/org/freedesktop/DBus',

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            interface='org.freedesktop.DBus',

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            member='AddMatch',

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            signature='s',

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            body=[match_rule]

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        )

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    )

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    logging.info("Listening for ALL D-Bus Messages on org.freedesktop.Notifications interface.")

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    logging.info("To test, send a notification, e.g., 'notify-send Hello World'")

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    # Keep the asyncio loop running indefinitely

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    await asyncio.get_running_loop().create_future()

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async def main():

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    """

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    The main entry point for the script.

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    """

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    try:

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        logging.info(f"Attempting to connect to the D-Bus session bus...")

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        bus = await MessageBus(bus_type=BusType.SESSION).connect()

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        logging.info("Successfully connected to the D-Bus session bus.")

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        # Attempt to call the GetCapabilities method to ensure the service is running

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        reply = await bus.call(

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            Message(

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                destination=NOTIF_SERVICE,

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                path=NOTIF_PATH,

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                interface=NOTIF_INTERFACE,

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                member='GetCapabilities',

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                signature='',

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                body=[]

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            )

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        )

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        if reply.message_type == MessageType.METHOD_RETURN:

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            caps = reply.body[0]

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            logging.info(f"Notification service capabilities retrieved: {caps}")

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            await notification_listener(bus)

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        else:

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            # This often means no notification daemon (like dunst or a desktop environment's service) is running.

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            logging.error("Could not retrieve notification service capabilities. Is a notification daemon running?")

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    except Exception as e:

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        logging.error(f"Error during D-Bus setup or initial capability check:   {e}")

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if __name__ == "__main__":

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    try:

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        # Run the main coroutine

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        asyncio.run(main())

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    except KeyboardInterrupt:

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        logging.info("Notification listener stopped by user.")

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    except Exception as e:

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        logging.error(f"An unexpected error occurred: {e}")

Es scheint, dass dies eine einfache Aufgabe sein sollte. Ich würde lieber ein Bash-Skript verwenden, wenn ich könnte, aber Python wäre auch in Ordnung.
Ich habe [diesen Beitrag][1] gefunden, der ein Python-Skript hatte, das ich aktualisieren musste, um mit py3 zu funktionieren. Dieses Skript wird ausgeführt, aber es passiert nichts, wenn ich eine Benachrichtigung erhalte oder eine über „notify-send“ sende

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import gi

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gi.require_version("Gtk", "3.0") # or "4.0" depending on your target GTK version

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from gi.repository import Gtk

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import dbus

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from dbus.mainloop.glib import DBusGMainLoop

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def filter_cb(bus, message):

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    # the NameAcquired message comes through before match string gets applied

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    if message.get_member() != "Notify":

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        return

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    args = message.get_args_list()

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    # args are

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    # (app_name, notification_id, icon, summary, body, actions, hints, timeout)

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    print("Notification from app '%s'" % args[0])

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    print("Summary: %s" % args[3])

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    print("Body: %s", args[4])

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DBusGMainLoop(set_as_default=True)

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bus = dbus.SessionBus()

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bus.add_match_string(

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    "type='method_call',interface='org.freedesktop.Notifications',member='Notify'")

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bus.add_message_filter(filter_cb)

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Gtk.main()

Vielen Dank.
[1]: http://askubuntu.com/questions/38733/ho ... tor-output