173 lines
4.5 KiB
Python
173 lines
4.5 KiB
Python
# Nemubot is a smart and modulable IM bot.
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# Copyright (C) 2012-2016 Mercier Pierre-Olivier
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import os
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import socket
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import nemubot.message as message
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from nemubot.message.printer.socket import Socket as SocketPrinter
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from nemubot.server.abstract import AbstractServer
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class _Socket(AbstractServer):
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"""Concrete implementation of a socket connection"""
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def __init__(self, printer=SocketPrinter, **kwargs):
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"""Create a server socket
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"""
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super().__init__(**kwargs)
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self.readbuffer = b''
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self.printer = printer
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# Write
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def _write(self, cnt):
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self._fd.sendall(cnt)
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def format(self, txt):
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if isinstance(txt, bytes):
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return txt + b'\r\n'
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else:
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return txt.encode() + b'\r\n'
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# Read
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def read(self, bufsize=1024, *args, **kwargs):
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return self._fd.recv(bufsize, *args, **kwargs)
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def parse(self, line):
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"""Implement a default behaviour for socket"""
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import shlex
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line = line.strip().decode()
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try:
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args = shlex.split(line)
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except ValueError:
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args = line.split(' ')
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if len(args):
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yield message.Command(cmd=args[0], args=args[1:], server=self._fd.fileno(), to=["you"], frm="you")
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def subparse(self, orig, cnt):
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for m in self.parse(cnt):
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m.to = orig.to
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m.frm = orig.frm
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m.date = orig.date
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yield m
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class SocketServer(_Socket):
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def __init__(self, host, port, bind=None, trynb=0, **kwargs):
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destlist = socket.getaddrinfo(host, port, proto=socket.IPPROTO_TCP)
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(family, type, proto, canonname, self._sockaddr) = destlist[trynb%len(destlist)]
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super().__init__(fdClass=socket.socket, family=family, type=type, proto=proto, **kwargs)
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self._bind = bind
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def connect(self):
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self._logger.info("Connecting to %s:%d", *self._sockaddr[:2])
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super().connect(self._sockaddr)
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self._logger.info("Connected to %s:%d", *self._sockaddr[:2])
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if self._bind:
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self._fd.bind(self._bind)
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class UnixSocket:
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def __init__(self, location, **kwargs):
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super().__init__(fdClass=socket.socket, family=socket.AF_UNIX, **kwargs)
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self._socket_path = location
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def connect(self):
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self._logger.info("Connection to unix://%s", self._socket_path)
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self.connect(self._socket_path)
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class SocketClient(_Socket):
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def __init__(self, **kwargs):
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super().__init__(fdClass=socket.socket, **kwargs)
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class _Listener:
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def __init__(self, new_server_cb, instanciate=SocketClient, **kwargs):
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super().__init__(**kwargs)
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self._instanciate = instanciate
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self._new_server_cb = new_server_cb
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def read(self):
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conn, addr = self._fd.accept()
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fileno = conn.fileno()
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self._logger.info("Accept new connection from %s (fd=%d)", addr, fileno)
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ss = self._instanciate(name=self.name + "#" + str(fileno), fileno=conn.detach())
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ss.connect = ss._on_connect
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self._new_server_cb(ss, autoconnect=True)
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return b''
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class UnixSocketListener(_Listener, UnixSocket, _Socket):
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def connect(self):
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self._logger.info("Creating Unix socket at unix://%s", self._socket_path)
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try:
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os.remove(self._socket_path)
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except FileNotFoundError:
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pass
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self._fd.bind(self._socket_path)
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self._fd.listen(5)
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self._logger.info("Socket ready for accepting new connections")
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self._on_connect()
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def close(self):
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import os
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import socket
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try:
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self._fd.shutdown(socket.SHUT_RDWR)
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except socket.error:
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pass
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super().close()
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try:
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if self._socket_path is not None:
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os.remove(self._socket_path)
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except:
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pass
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