from __future__ import print_function
-import os, sys, select, MySQLdb, MySQLdb.cursors, time, random, gc
+import os, sys, select, MySQLdb, MySQLdb.cursors, time, traceback, random, gc
import bot, config, ctlmod
class Erebus(object): #singleton to pass around
self.po.register(fileno, select.POLLIN)
elif self.potype == "select":
self.fdlist.append(fileno)
+ def delfd(self, fileno):
+ del self.fds[fileno]
+ if self.potype == "poll":
+ self.po.unregister(fileno)
+ elif self.potype == "select":
+ self.fdlist.remove(fileno)
def bot(self, name): #get Bot() by name (nick)
return self.bots[name.lower()]
def loop():
poready = main.poll()
for fileno in poready:
- for line in main.fd(fileno).getdata():
- main.fd(fileno).parse(line)
+ try:
+ data = main.fd(fileno).getdata()
+ except:
+ main.log('*', '!', 'Super-mega-emergency: getdata raised exception for socket %d' % (fileno))
+ traceback.print_exc()
+ data = None
+ if data is None:
+ main.fd(fileno).close()
+ else:
+ for line in data:
+ try:
+ main.fd(fileno).parse(line)
+ except:
+ main.log('*', '!', 'Super-mega-emergency: parse raised exception for socket %d data %r' % (fileno, line))
+ traceback.print_exc()
if main.mustquit is not None:
main.log('*', '!', 'Core exiting due to: %s' % (main.mustquit))
raise main.mustquit
# This file is released into the public domain; see http://unlicense.org/
import sys
+import socket
from functools import wraps
if sys.version_info.major < 3:
WRONGARGS = "Wrong number of arguments."
def __init__(self, name):
- self.hooks = {}
- self.chanhooks = {}
- self.exceptionhooks = []
- self.numhooks = {}
+ self.hooks = {} # {command:handler}
+ self.chanhooks = {} # {channel:handler}
+ self.exceptionhooks = [] # [(exception,handler)]
+ self.numhooks = {} # {numeric:handler}
+ self.sockhooks = [] # [(af,ty,address,handler_class)]
+ self.sockets = [] # [(sock,obj)]
self.helps = []
self.parent = None
parent.hookexception(exc, func)
for num, func in self.numhooks.items():
parent.hooknum(num, func)
+ for hookdata in self.sockhooks:
+ self._create_socket(*hookdata)
for func, args, kwargs in self.helps:
try:
parent.unhookexception(exc, func)
for num, func in self.numhooks.items():
parent.unhooknum(num, func)
+ for sock, obj in self.sockets:
+ self._destroy_socket(sock, obj)
for func, args, kwargs in self.helps:
try:
return func
return realhook
+ def bind_tcp(self, host, port):
+ return self._hooksocket(socket.AF_INET, socket.SOCK_STREAM, (host, port))
+ def bind_udp(self, host, port):
+ return self._hooksocket(socket.AF_INET, socket.SOCK_DGRAM, (host, port))
+ def bind_unix(self, path):
+ return self._hooksocket(socket.AF_UNIX, socket.SOCK_STREAM, path)
+ def _hooksocket(self, af, ty, address):
+ def realhook(cls):
+ if not (hasattr(cls, 'getdata') and callable(cls.getdata)):
+ # Check early that the object implements getdata.
+ # If getdata ever returns a non-empty list, then a parse method must also exist, but we don't check that.
+ raise Exception('Attempted to hook a socket without a class to process data')
+ self.sockhooks.append((af, ty, address, cls))
+ if self.parent is not None:
+ self._create_socket(af, ty, address, cls)
+ return cls
+ return realhook
+ def _create_socket(self, af, ty, address, cls):
+ ty = ty | socket.SOCK_NONBLOCK
+ sock = socket.socket(af, ty)
+ sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
+ sock.bind(address)
+ obj = _ListenSocket(self, sock, cls)
+ self.sockets.append((sock,obj))
+ sock.listen(5)
+ self.parent.newfd(obj, sock.fileno())
+ self.parent.log(repr(obj), '?', 'Socket ready to accept new connections')
+ def _destroy_socket(self, sock, obj):
+ obj.close()
+
def mod(self, modname):
if self.parent is not None:
return self.parent.module(modname)
self.helps.append((func, args, kwargs))
return func
return realhook
+
+class _ListenSocket(object):
+ def __init__(self, lib, sock, cls):
+ self.clients = []
+ self.lib = lib
+ self.sock = sock
+ self.cls = cls
+
+ def _make_closer(self, obj, client):
+ def close():
+ print(repr(self), repr(obj))
+ self.lib.parent.log(repr(self), '?', 'Closing child socket %d' % (client.fileno()))
+ try:
+ obj.closing()
+ except AttributeError:
+ pass
+ self.lib.parent.delfd(client.fileno())
+ client.shutdown(socket.SHUT_RDWR)
+ client.close()
+ self.clients.remove((client,obj))
+ return close
+
+ def getdata(self):
+ client, addr = self.sock.accept()
+ obj = self.cls(client)
+ obj.close = self._make_closer(obj, client)
+ self.lib.parent.log(repr(self), '?', 'New connection %d from %s' % (client.fileno(), addr))
+ self.clients.append((client,obj))
+ self.lib.parent.newfd(obj, client.fileno())
+ return []
+
+ def close(self):
+ self.lib.parent.log(repr(self), '?', 'Socket closing')
+ if self.sock.fileno() != -1:
+ self.lib.parent.delfd(self.sock.fileno())
+ self.sock.shutdown(socket.SHUT_RDWR)
+ self.sock.close()
+ for client, obj in self.clients:
+ obj.close()
+
+ def __repr__(self): return '<_ListenSocket #%d>' % (self.sock.fileno())
--- /dev/null
+# Erebus IRC bot - Author: Erebus Team
+# vim: fileencoding=utf-8
+# This file is released into the public domain; see http://unlicense.org/
+
+# module info
+modinfo = {
+ 'author': 'Erebus Team',
+ 'license': 'public domain',
+ 'compatible': [0],
+ 'depends': [],
+ 'softdeps': ['help'],
+}
+
+# preamble
+import modlib
+lib = modlib.modlib(__name__)
+modstart = lib.modstart
+modstop = lib.modstop
+
+# module code
+
+# Note: bind_* does all of the following:
+# - create a socket `sock = socket.socket()`
+# - bind the socket `sock.bind()`
+# - listen on the socket `sock.listen()`
+# - accept `sock.accept()`
+#
+# Once a connection is accepted, your class is instantiated with the client socket.
+# - When data comes in on the client socket, your `getdata` method will be called. It should return a list of strings.
+# - For each element in the list returned by `getdata`, `parse` will be called.
+# - When the socket is being closed by the bot (f.e. your module is unloaded), the optional method `closing` will be called.
+# Then the bot will call `sock.shutdown()` and `sock.close()` for you.
+# XXX error handling? what happens when the other side closes the socket?
+#
+# You can interact with the rest of the bot through `lib.parent`.
+@lib.bind_tcp('0.0.0.0', 12543)
+class BasicServer(object):
+ def __init__(self, sock):
+ self.buffer = b''
+ self.sock = sock
+
+ def getdata(self):
+ recvd = self.sock.recv(8192)
+ if recvd == b"":
+ if len(self.buffer) != 0:
+ # Process what's left in the buffer. We'll get called again after.
+ remaining_buf = self.buffer.decode('utf-8', 'backslashreplace')
+ self.buffer = b""
+ return [remaining_buf]
+ else:
+ # Nothing left in the buffer. Return None to signal the core to close this socket.
+ return None
+ self.buffer += recvd
+ lines = []
+
+ while b"\n" in self.buffer:
+ pieces = self.buffer.split(b"\n", 1)
+ s = pieces[0].decode('utf-8', 'backslashreplace').rstrip("\r")
+ lines.append(pieces[0].decode('utf-8', 'backslashreplace'))
+ self.buffer = pieces[1]
+
+ return lines
+
+ def parse(self, line):
+ peer = self.sock.getpeername()
+ lib.parent.randbot().msg('#', "%s:%d says: %s" % (peer[0], peer[1], line))
+
+ def send(self, line):
+ self.socket.sendall(line.encode('utf-8', 'backslashreplace')+b"\r\n")
+
+ def _getsockerr(self):
+ try: # SO_ERROR might not exist on all platforms
+ return self.socket.getsockopt(socket.SOL_SOCKET, socket.SO_ERROR)
+ except:
+ return None
projects / erebus.git / commitdiff
