Added log.firewall and log.MetaFirewall, and converted several classes to use them.

src/asyncoreDrivers.py

@@ -83,11 +83,7 @@ class AsyncoreDriver(asynchat.async_chat, object):
 
     def writable(self):
         while self.connected:
-            try:
             m = self.irc.takeMsg()
-            except Exception, e:
-                log.exception('Uncaught exception in irclib.Irc.takeMsg:')
-                return
             if m:
                 self.push(str(m))
             else:

src/callbacks.py

@@ -434,13 +434,7 @@ class IrcObjectProxy(RichReplyMethods):
                 log.debug('Finished calling invalidCommand: %s', cb.name())
                 return
             if hasattr(cb, 'invalidCommand'):
-                try:
                 cb.invalidCommand(self, self.msg, self.args)
-                except Exception, e:
-                    cb.log.exception('Uncaught exception in invalidCommand:')
-                    log.warning('Uncaught exception in %s.invalidCommand, '
-                                'continuing to call other invalidCommands.' %
-                                cb.name())
 
     def _callCommand(self, name, command, cb):
         try:
@@ -669,6 +663,8 @@ class ConfigIrcProxy(RichReplyMethods):
     
 class Privmsg(irclib.IrcCallback):
     """Base class for all Privmsg handlers."""
+    __metaclass__ = log.MetaFirewall
+    __firewalled__ = {'invalidCommand': None} # Eventually callCommand.
     threaded = False
     public = True
     alwaysCall = ()

src/irclib.py

@@ -75,6 +75,13 @@ class IrcCallback(IrcCommandDispatcher):
     # priority means the callback is called *earlier* on the inFilter chain,
     # *earlier* on the __call__ chain, and *later* on the outFilter chain.
     priority = 99
+    __metaclass__ = log.MetaFirewall
+    __firewalled__ = {'die': None,
+                      'reset': None,
+                      '__call__': None,
+                      'inFilter': lambda self, irc, msg: msg,
+                      'outFilter': lambda self, irc, msg: msg,
+                      'name': lambda self: self.__class__.__name__,}
     def name(self):
         """Returns the name of the callback."""
         return self.__class__.__name__
@@ -99,11 +106,7 @@ class IrcCallback(IrcCommandDispatcher):
         """Used for handling each message."""
         method = self.dispatchCommand(msg.command)
         if method is not None:
-            try:
             method(irc, msg)
-            except Exception, e:
-                s = 'Exception caught in generic IrcCallback.__call__:'
-                log.exception(s)
 
     def reset(self):
         """Resets the callback.  Called when reconnecting to the server."""
@@ -263,6 +266,8 @@ class IrcState(IrcCommandDispatcher):
     """Maintains state of the Irc connection.  Should also become smarter.
     """
     __slots__ = ('history', 'nicksToHostmasks', 'channels')
+    __metaclass__ = log.MetaFirewall
+    __firewalled__ = {'addMsg': None}
     def __init__(self):
         self.history = RingBuffer(conf.supybot.maxHistoryLength())
         self.reset()
@@ -411,6 +416,10 @@ class Irc(IrcCommandDispatcher):
 
     Handles PING commands already.
     """
+    __metaclass__ = log.MetaFirewall
+    __firewalled__ = {'die': None,
+                      'feedMsg': None,
+                      'takeMsg': None,}
     _nickSetters = sets.Set(['001', '002', '003', '004', '250', '251', '252',
                              '254', '255', '265', '266', '372', '375', '376',
                              '333', '353', '332', '366', '005'])
@@ -520,31 +529,16 @@ class Irc(IrcCommandDispatcher):
         if msg:
             log.debug(repr(msg))
             for callback in reviter(self.callbacks):
-                try:
+                msg = callback.outFilter(self, msg)
-                    outFilter = getattr(callback, 'outFilter')
-                except AttributeError, e:
-                    continue
-                try:
-                    msg = outFilter(self, msg)
-                except:
-                    log.exception('Exception caught in outFilter:')
-                    continue
                 if msg is None:
-                    log.debug('%s.outFilter returned None' % callback.name())
+                    log.debug('%s.outFilter returned None.' % callback.name())
                     return self.takeMsg()
             if len(str(msg)) > 512:
                 # Yes, this violates the contract, but at this point it doesn't
                 # matter.  That's why we gotta go munging in private attributes
                 msg._str = msg._str[:500] + '\r\n'
                 msg._len =  len(str(msg))
-            try:
             self.state.addMsg(self, msg)
-            except Exception, e:
-                log.exception('Uncaught exception in IrcState.addMsg.  This '
-                              'could be a bug, but it could also be the '
-                              'result of an invalid message being sent via '
-                              'Owner.ircquote.')
-                return
             log.debug('Outgoing message: ' + str(msg).rstrip('\r\n'))
             return msg
         else:
@@ -668,10 +662,7 @@ class Irc(IrcCommandDispatcher):
         log.info('Irc object for %s dying.' % self.server)
         if self in world.ircs:
             for cb in self.callbacks:
-                try:
                 cb.die()
-                except Exception, e:
-                    log.exception('Uncaught exception in %s.die:', cb.name())
             world.ircs.remove(self)
         else:
             log.warning('Irc object killed twice.')

src/log.py

@@ -42,6 +42,7 @@ import logging
 
 import ansi
 import conf
+import utils
 import registry
 
 deadlyExceptions = [KeyboardInterrupt, SystemExit]
@@ -166,6 +167,45 @@ def timestamp(when=None):
     format = conf.supybot.log.timestampFormat()
     return time.strftime(format, time.localtime(when))
 
+def firewall(f, errorHandler=None):
+    def logException(self, s=None):
+        if s is None:
+            s = 'Uncaught exception'
+        if hasattr(self, 'log'):
+            self.log.exception('%s:', s)
+        else:
+            exception('%s in %s.%s:', s, self.__class__.__name__, f.func_name)
+    def m(self, *args, **kwargs):
+        try:
+            return f(self, *args, **kwargs)
+        except Exception, e:
+            logException(self)
+            if errorHandler is not None:
+                try:
+                    errorHandler(self, *args, **kwargs)
+                except Exception, e:
+                    logException(self, 'Uncaught exception in errorHandler')
+                    
+    m = utils.changeFunctionName(m, f.func_name, f.__doc__)
+    return m
+
+class MetaFirewall(type):
+    def __new__(cls, name, bases, dict):
+        firewalled = {}
+        for base in bases:
+            if hasattr(base, '__firewalled__'):
+                firewalled.update(base.__firewalled__)
+        if '__firewalled__' in dict:
+            firewalled.update(dict['__firewalled__'])
+        for attr in firewalled:
+            if attr in dict:
+                try:
+                    errorHandler = firewalled[attr]
+                except:
+                    errorHandler = None
+                dict[attr] = firewall(dict[attr], errorHandler)
+        return type.__new__(cls, name, bases, dict)
+
 
 class LogLevel(registry.Value):
     def set(self, s):

src/socketDrivers.py

@@ -75,11 +75,7 @@ class SocketDriver(drivers.IrcDriver):
         self.reconnect()
 
     def _sendIfMsgs(self):
-        try:
         msgs = [self.irc.takeMsg()]
-        except Exception, e:
-            log.exception('Uncaught exception in irclib.Irc.takeMsg:')
-            return
         while msgs[-1] is not None:
             msgs.append(self.irc.takeMsg())
         del msgs[-1]

src/twistedDrivers.py

@@ -69,11 +69,7 @@ class SupyIrcProtocol(LineReceiver):
 
     def checkIrcForMsgs(self):
         if self.connected:
-            try:
             msg = self.irc.takeMsg()
-            except Exception, e:
-                log.exception('Uncaught exception in irclib.Irc.takeMsg:')
-                return
             if msg:
                 self.transport.write(str(msg))
         self.mostRecentCall = reactor.callLater(1, self.checkIrcForMsgs)