add an XML-RPC interface to the irc bot

this allows plugins to register methods that can be called over XML-RPC

the old bot used this interface behind apache for a web service, but i
think in this version it will only be for django -> ircbot, and django
will have a rest API for other things

dr_botzo/dr_botzo/settings.py

@@ -131,6 +131,11 @@ IRCBOT_SSL = False
 IRCBOT_IPV6 = False
 
 
+# XML-RPC settings
+IRCBOT_XMLRPC_HOST = 'localhost'
+IRCBOT_XMLRPC_PORT = 13132
+
+
 # IRC module stuff
 
 # weather

dr_botzo/ircbot/bot.py

@@ -7,9 +7,11 @@ import collections
 import copy
 import logging
 import re
+from SimpleXMLRPCServer import SimpleXMLRPCServer, SimpleXMLRPCRequestHandler
 import socket
 import ssl
 import sys
+import thread
 
 from django.conf import settings
 
@@ -25,6 +27,15 @@ from ircbot.models import Alias, IrcChannel, IrcPlugin
 log = logging.getLogger('ircbot.bot')
 
 
+class IrcBotXMLRPCRequestHandler(SimpleXMLRPCRequestHandler):
+
+    """Override the basic request handler to change the logging."""
+
+    def log_message(self, format, *args):
+        """Use a logger rather than stderr."""
+        log.debug("XML-RPC - %s - %s", self.client_address[0], format%args)
+
+
 class PrioritizedRegexHandler(collections.namedtuple('Base', ('priority', 'regex', 'callback'))):
     def __lt__(self, other):
         "when sorting prioritized handlers, only use the priority"
@@ -325,6 +336,16 @@ class IRCBot(irc.client.SimpleIRCClient):
         self.connection.reactor.add_global_regex_handler('privmsg', r'^!unload\s+([\S]+)$',
                                                          getattr(self, 'handle_unload'), -20)
 
+        # load XML-RPC server
+        self.xmlrpc = SimpleXMLRPCServer((settings.IRCBOT_XMLRPC_HOST, settings.IRCBOT_XMLRPC_PORT),
+                                         requestHandler=IrcBotXMLRPCRequestHandler, allow_none=True)
+        self.xmlrpc.register_introspection_functions()
+
+        thread.start_new_thread(self._xmlrpc_listen, ())
+
+        # register XML-RPC stuff
+        self.xmlrpc.register_function(self.privmsg, 'privmsg')
+
     def _connected_checker(self):
         if not self.connection.is_connected():
             self.connection.execute_delayed(self.reconnection_interval,
@@ -468,6 +489,7 @@ class IRCBot(irc.client.SimpleIRCClient):
             msg -- Quit message.
         """
 
+        self._xmlrpc_shutdown()
         self.connection.disconnect(msg)
         sys.exit(0)
 
@@ -682,6 +704,32 @@ class IRCBot(irc.client.SimpleIRCClient):
                 if stop:
                     return "NO MORE"
 
+    def xmlrpc_register_function(self, func, name):
+        """Add a method to the XML-RPC interface.
+
+        :param func: the method to register
+        :type func: a method
+        :param name: the name to expose the method as
+        :type name: str
+        """
+
+        if func and self.xmlrpc:
+            if hasattr(func, '__call__'):
+                self.xmlrpc.register_function(func, name)
+
+    def _xmlrpc_listen(self):
+        """Begin listening. Hopefully this was called in a new thread."""
+
+        self.xmlrpc.serve_forever()
+
+    def _xmlrpc_shutdown(self):
+        """Shut down the XML-RPC server."""
+
+        if self.xmlrpc is not None:
+            self.xmlrpc.shutdown()
+            self.xmlrpc.server_close()
+
+
     def start(self):
         """Start the bot."""