libirc.py 文件源码

def connect(self, addr=('irc.freenode.net', 6667), use_ssl=False):
        '''Connect to a IRC server. addr is a tuple of (server, port)'''
        self.acquire_lock()
        self.addr = (rmnlsp(addr[0]), addr[1])

        for res in socket.getaddrinfo(self.addr[0], self.addr[1], socket.AF_UNSPEC, socket.SOCK_STREAM):
            af, socktype, proto, canonname, sa = res
            try:
                if use_ssl:
                    if (3,) <= sys.version_info < (3, 3):
                        self.sock = ssl.SSLSocket(af, socktype, proto)
                    elif sys.version_info >= (3, 4):
                        ctx = ssl.create_default_context()
                        if ssl.HAS_SNI:
                            self.sock = ctx.wrap_socket(socket.socket(af, socktype, proto), server_hostname=self.addr[0])
                        else:
                            self.sock = ctx.wrap_socket(socket.socket(af, socktype, proto))
                    else:
                        self.sock = ssl.SSLSocket(sock=socket.socket(af, socktype, proto))
                else:
                    self.sock = socket.socket(af, socktype, proto)
            except socket.error:
                self.sock = None
                continue
            try:
                self.sock.settimeout(300)
                self.sock.connect(sa)
            except socket.error:
                self.sock.close()
                self.sock = None
                continue
            break

        if self.sock is None:
            e = socket.error(
                '[errno %d] Socket operation on non-socket' % errno.ENOTSOCK)
            e.errno = errno.ENOTSOCK
            self.lock.release()
            raise e

        self.nick = None
        self.recvbuf = b''
        self.sendbuf = b''
        self.lock.release()