feat: Add config option redirect_stderr.

Proposed in #282.

configuration.example.ini

@@ -84,7 +84,10 @@ port = 64738
 #pip3_path = venv/bin/pip
 
 # 'logfile': write logs into this file.
+# 'redirect_strerr': capture outputs from stderr and write into the `logfile`,
+#                    useful for capture the exception message when the bot crash.
 #logfile =
+#redirect_strerr = False
 
 #announce_current_music = True
 #allow_other_channel_message = False

mumbleBot.py

@@ -246,6 +246,11 @@ class MumbleBot:
     def message_received(self, text):
         raw_message = text.message.strip()
         message = re.sub(r'<.*?>', '', raw_message)
+        if text.actor == 0:
+            # Some server will send a welcome message to the bot once connected.
+            # It doesn't have a valid "actor". Simply ignore it here.
+            return
+
         user = self.mumble.users[text.actor]['name']
 
         if var.config.getboolean('commands', 'split_username_at_space'):
@@ -797,8 +802,9 @@ if __name__ == '__main__':
     if logfile:
         print(f"Redirecting stdout and stderr to log file: {logfile}")
         handler = logging.handlers.RotatingFileHandler(logfile, mode='a', maxBytes=10240)  # Rotate after 10KB
-        sys.stdout = util.LoggerIOWrapper(bot_logger, logging.INFO, fallback_io_buffer=sys.stdout.buffer)
-        sys.stderr = util.LoggerIOWrapper(bot_logger, logging.INFO, fallback_io_buffer=sys.stderr.buffer)
+        if var.config.getboolean("bot", "redirect_stderr", fallback=False):
+            sys.stderr = util.LoggerIOWrapper(bot_logger, logging.INFO,
+                                              fallback_io_buffer=sys.stderr.buffer)
     else:
         handler = logging.StreamHandler()