class Client(BaseComponent):
channel = "client"
socket_family = AF_INET
socket_type = SOCK_STREAM
socket_protocol = IPPROTO_IP
socket_options = []
def __init__(self, bind=None, bufsize=BUFSIZE, channel=channel, **kwargs):
super(Client, self).__init__(channel=channel, **kwargs)
if isinstance(bind, SocketType):
self._bind = bind.getsockname()
self._sock = bind
else:
self._bind = self.parse_bind_parameter(bind)
self._sock = self._create_socket()
self._bufsize = bufsize
self._ssock = None
self._poller = None
self._buffer = deque()
self._closeflag = False
self._connected = False
self.host = None
self.port = 0
self.secure = False
self.server = {}
self.issuer = {}
def parse_bind_parameter(self, bind_parameter):
return parse_ipv4_parameter(bind_parameter)
@property
def connected(self):
return getattr(self, "_connected", None)
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("read_value_changed")
def _on_read_value_changed(self, value):
if isinstance(value, binary_type):
self.fire(write(value))
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if not self._connected:
return
self._poller.discard(self._sock)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._sock.shutdown(2)
except SocketError:
pass
try:
self._sock.close()
except SocketError:
pass
self.fire(disconnected())
@handler("close")
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
try:
if self.secure and self._ssock:
data = self._ssock.read(self._bufsize)
else:
data = self._sock.recv(self._bufsize)
except SSLError as exc:
if exc.errno in (SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE):
return
raise
if data:
self.fire(read(data)).notify = True
else:
self.close()
except SocketError as e:
if e.args[0] == EWOULDBLOCK:
return
else:
self.fire(error(e))
self._close()
def _write(self, data):
try:
if self.secure and self._ssock:
nbytes = self._ssock.write(data)
else:
nbytes = self._sock.send(data)
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except SocketError as e:
if e.args[0] in (EPIPE, ENOTCONN):
self._close()
else:
self.fire(error(e))
@handler("write")
def write(self, data):
if not self._poller.isWriting(self._sock):
self._poller.addWriter(self, self._sock)
self._buffer.append(data)
@handler("_disconnect", priority=1)
def __on_disconnect(self, sock):
self._close()
@handler("_read", priority=1)
def __on_read(self, sock):
self._read()
@handler("_write", priority=1)
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._sock):
self._poller.removeWriter(self._sock)
def _create_socket(self):
sock = socket(self.socket_family, self.socket_type, self.socket_protocol)
for option in self.socket_options:
sock.setsockopt(*option)
sock.setblocking(False)
if self._bind is not None:
sock.bind(self._bind)
return sock
class Serial(Component):
channel = "serial"
def __init__(self,
port,
baudrate=115200,
bufsize=BUFSIZE,
timeout=TIMEOUT,
channel=channel):
super(Serial, self).__init__(channel=channel)
if serial is None:
raise RuntimeError("No serial support available")
self._port = port
self._baudrate = baudrate
self._bufsize = bufsize
self._serial = None
self._poller = None
self._buffer = deque()
self._closeflag = False
@handler("ready")
def _on_ready(self, component):
self.fire(_open(), self.channel)
@handler("_open")
def _on_open(self, port=None, baudrate=None, bufsize=None):
self._port = port or self._port
self._baudrate = baudrate or self._baudrate
self._bufsize = bufsize or self._bufsize
self._serial = serial.Serial(port=self._port,
baudrate=self._baudrate,
timeout=0)
self._fd = self._serial.fileno() # not portable!
self._poller.addReader(self, self._fd)
self.fire(opened(self._port, self._baudrate))
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if self._closeflag:
return
self._poller.discard(self._fd)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._serial.close()
except:
pass
self.fire(closed())
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
data = self._serial.read(self._bufsize)
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
if data:
self.fire(read(data)).notify = True
except (OSError, IOError) as e:
self.fire(error(e))
self._close()
def _write(self, data):
try:
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
try:
nbytes = self._serial.write(data)
except (serial.SerialTimeoutException) as e:
nbytes = 0
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except (OSError, IOError) as e:
self.fire(error(e))
self._close()
def write(self, data):
if self._poller is not None and not self._poller.isWriting(self._fd):
self._poller.addWriter(self, self._fd)
self._buffer.append(data)
@handler("_disconnect")
def __on_disconnect(self, sock):
self._close()
@handler("_read")
def __on_read(self, sock):
self._read()
@handler("_write")
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._fd):
self._poller.removeWriter(self._fd)
class Server(BaseComponent):
channel = "server"
socket_protocol = IPPROTO_IP
def __init__(self, bind, secure=False, backlog=BACKLOG,
bufsize=BUFSIZE, channel=channel, **kwargs):
super(Server, self).__init__(channel=channel)
self.socket_options = self.socket_options[:] + kwargs.get('socket_options', [])
self._bind = self.parse_bind_parameter(bind)
self._backlog = backlog
self._bufsize = bufsize
if isinstance(bind, socket):
self._sock = bind
else:
self._sock = self._create_socket()
self._closeq = []
self._clients = []
self._poller = None
self._buffers = defaultdict(deque)
self.__starttls = set()
self.secure = secure
self.certfile = kwargs.get("certfile")
self.keyfile = kwargs.get("keyfile", None)
self.cert_reqs = kwargs.get("cert_reqs", CERT_NONE)
self.ssl_version = kwargs.get("ssl_version", PROTOCOL_SSLv23)
self.ca_certs = kwargs.get("ca_certs", None)
if self.secure and not self.certfile:
raise RuntimeError("certfile must be specified for server-side operations")
def parse_bind_parameter(self, bind_parameter):
return parse_ipv4_parameter(bind_parameter)
@property
def connected(self):
return True
@property
def host(self):
if getattr(self, "_sock", None) is not None:
try:
sockname = self._sock.getsockname()
if isinstance(sockname, tuple):
return sockname[0]
else:
return sockname
except SocketError:
return None
@property
def port(self):
if getattr(self, "_sock", None) is not None:
try:
sockname = self._sock.getsockname()
if isinstance(sockname, tuple):
return sockname[1]
except SocketError:
return None
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
else:
self._poller = Poller().register(self)
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("read_value_changed")
def _on_read_value_changed(self, value):
if isinstance(value.value, binary_type):
sock = value.event.args[0]
self.fire(write(sock, value.value))
def _close(self, sock):
if sock is None:
return
if sock != self._sock and sock not in self._clients:
return
self._poller.discard(sock)
if sock in self._buffers:
del self._buffers[sock]
if sock in self._clients:
self._clients.remove(sock)
else:
self._sock = None
if sock in self.__starttls:
self.__starttls.remove(sock)
try:
sock.shutdown(2)
except SocketError:
pass
try:
sock.close()
except SocketError:
pass
self.fire(disconnect(sock))
@handler("close")
def close(self, sock=None):
is_closed = sock is None
if sock is None:
socks = [self._sock]
socks.extend(self._clients[:])
else:
socks = [sock]
for sock in socks:
if not self._buffers[sock]:
self._close(sock)
elif sock not in self._closeq:
self._closeq.append(sock)
if is_closed:
self.fire(closed())
def _read(self, sock):
if sock not in self._clients:
return
try:
data = sock.recv(self._bufsize)
if data:
self.fire(read(sock, data)).notify = True
else:
self.close(sock)
except SocketError as e:
if e.args[0] == EWOULDBLOCK:
return
else:
self.fire(error(sock, e))
self._close(sock)
def _write(self, sock, data):
if sock not in self._clients:
return
try:
nbytes = sock.send(data)
if nbytes < len(data):
self._buffers[sock].appendleft(data[nbytes:])
except SocketError as e:
if e.args[0] not in (EINTR, EWOULDBLOCK, ENOBUFS):
self.fire(error(sock, e))
self._close(sock)
else:
self._buffers[sock].appendleft(data)
@handler("write")
def write(self, sock, data):
if not self._poller.isWriting(sock):
self._poller.addWriter(self, sock)
self._buffers[sock].append(data)
def _accept(self):
try:
newsock, host = self._sock.accept()
except SocketError as e:
if e.args[0] in (EWOULDBLOCK, EAGAIN):
return
elif e.args[0] == EPERM:
# Netfilter on Linux may have rejected the
# connection, but we get told to try to accept()
# anyway.
return
elif e.args[0] in (EMFILE, ENOBUFS, ENFILE, ENOMEM, ECONNABORTED):
# Linux gives EMFILE when a process is not allowed
# to allocate any more file descriptors. *BSD and
# Win32 give (WSA)ENOBUFS. Linux can also give
# ENFILE if the system is out of inodes, or ENOMEM
# if there is insufficient memory to allocate a new
# dentry. ECONNABORTED is documented as possible on
# both Linux and Windows, but it is not clear
# whether there are actually any circumstances under
# which it can happen (one might expect it to be
# possible if a client sends a FIN or RST after the
# server sends a SYN|ACK but before application code
# calls accept(2), however at least on Linux this
# _seems_ to be short-circuited by syncookies.
return
else:
raise
if self.secure and HAS_SSL:
for _ in self._do_handshake(newsock):
yield
else:
self._on_accept_done(newsock)
def _do_handshake(self, sock, fire_connect_event=True):
sslsock = ssl_socket(
sock,
server_side=True,
keyfile=self.keyfile,
ca_certs=self.ca_certs,
certfile=self.certfile,
cert_reqs=self.cert_reqs,
ssl_version=self.ssl_version,
do_handshake_on_connect=False
)
for _ in do_handshake(sslsock, self._on_accept_done, self._on_handshake_error, (fire_connect_event,)):
yield _
def _on_accept_done(self, sock, fire_connect_event=True):
sock.setblocking(False)
self._poller.addReader(self, sock)
self._clients.append(sock)
if fire_connect_event:
try:
self.fire(connect(sock, *sock.getpeername()))
except SocketError as exc:
# errno 107 (ENOTCONN): the client already disconnected
self._on_handshake_error(sock, exc)
def _on_handshake_error(self, sock, err):
self.fire(error(sock, err))
self._close(sock)
@handler('starttls')
def starttls(self, sock):
if not HAS_SSL:
raise RuntimeError('Cannot start TLS. No TLS support.')
if sock in self.__starttls:
raise RuntimeError('Cannot reuse socket for already started STARTTLS.')
self.__starttls.add(sock)
self._poller.removeReader(sock)
self._clients.remove(sock)
for _ in self._do_handshake(sock, False):
yield
@handler("_disconnect", priority=1)
def _on_disconnect(self, sock):
self._close(sock)
@handler("_read", priority=1)
def _on_read(self, sock):
if sock == self._sock:
return self._accept()
else:
self._read(sock)
@handler("_write", priority=1)
def _on_write(self, sock):
if self._buffers[sock]:
data = self._buffers[sock].popleft()
self._write(sock, data)
if not self._buffers[sock]:
if sock in self._closeq:
self._closeq.remove(sock)
self._close(sock)
elif self._poller.isWriting(sock):
self._poller.removeWriter(sock)
def _create_socket(self):
sock = socket(self.socket_family, self.socket_type, self.socket_protocol)
for option in self.socket_options:
sock.setsockopt(*option)
sock.setblocking(False)
if self._bind is not None:
sock.bind(self._bind)
return sock
class Client(BaseComponent):
channel = "client"
def __init__(self, bind=None, bufsize=BUFSIZE, channel=channel, **kwargs):
super(Client, self).__init__(channel=channel, **kwargs)
if isinstance(bind, SocketType):
self._bind = bind.getsockname()
self._sock = bind
else:
self._bind = self.parse_bind_parameter(bind)
self._sock = self._create_socket()
self._bufsize = bufsize
self._ssock = None
self._poller = None
self._buffer = deque()
self._closeflag = False
self._connected = False
self.host = None
self.port = 0
self.secure = False
self.server = {}
self.issuer = {}
def parse_bind_parameter(self, bind_parameter):
return parse_ipv4_parameter(bind_parameter)
@property
def connected(self):
return getattr(self, "_connected", None)
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("read_value_changed")
def _on_read_value_changed(self, value):
if isinstance(value, binary_type):
self.fire(write(value))
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if not self._connected:
return
self._poller.discard(self._sock)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._sock.shutdown(2)
except SocketError:
pass
try:
self._sock.close()
except SocketError:
pass
self.fire(disconnected())
@handler("close")
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
if self.secure and self._ssock:
data = self._ssock.read(self._bufsize)
else:
try:
data = self._sock.recv(self._bufsize)
except SSLError as exc:
if exc.errno in (SSL_ERROR_WANT_READ, SSL_ERROR_WANT_WRITE):
return
raise
if data:
self.fire(read(data)).notify = True
else:
self.close()
except SocketError as e:
if e.args[0] == EWOULDBLOCK:
return
else:
self.fire(error(e))
self._close()
def _write(self, data):
try:
if self.secure and self._ssock:
nbytes = self._ssock.write(data)
else:
nbytes = self._sock.send(data)
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except SocketError as e:
if e.args[0] in (EPIPE, ENOTCONN):
self._close()
else:
self.fire(error(e))
@handler("write")
def write(self, data):
if not self._poller.isWriting(self._sock):
self._poller.addWriter(self, self._sock)
self._buffer.append(data)
@handler("_disconnect", priority=1)
def __on_disconnect(self, sock):
self._close()
@handler("_read", priority=1)
def __on_read(self, sock):
self._read()
@handler("_write", priority=1)
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._sock):
self._poller.removeWriter(self._sock)
class Server(BaseComponent):
channel = "server"
def __init__(self, bind, secure=False, backlog=BACKLOG,
bufsize=BUFSIZE, channel=channel, **kwargs):
super(Server, self).__init__(channel=channel)
self._bind = self.parse_bind_parameter(bind)
self._backlog = backlog
self._bufsize = bufsize
if isinstance(bind, socket):
self._sock = bind
else:
self._sock = self._create_socket()
self._closeq = []
self._clients = []
self._poller = None
self._buffers = defaultdict(deque)
self.secure = secure
if self.secure:
try:
self.certfile = kwargs["certfile"]
except KeyError:
raise RuntimeError(
"certfile must be specified for server-side operations")
self.keyfile = kwargs.get("keyfile", None)
self.cert_reqs = kwargs.get("cert_reqs", CERT_NONE)
self.ssl_version = kwargs.get("ssl_version", PROTOCOL_SSLv23)
self.ca_certs = kwargs.get("ca_certs", None)
def parse_bind_parameter(self, bind_parameter):
return parse_ipv4_parameter(bind_parameter)
@property
def connected(self):
return True
@property
def host(self):
if getattr(self, "_sock", None) is not None:
try:
sockname = self._sock.getsockname()
if isinstance(sockname, tuple):
return sockname[0]
else:
return sockname
except SocketError:
return None
@property
def port(self):
if getattr(self, "_sock", None) is not None:
try:
sockname = self._sock.getsockname()
if isinstance(sockname, tuple):
return sockname[1]
except SocketError:
return None
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
else:
self._poller = Poller().register(self)
self._poller.addReader(self, self._sock)
self.fire(ready(self, (self.host, self.port)))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("read_value_changed")
def _on_read_value_changed(self, value):
if isinstance(value.value, binary_type):
sock = value.event.args[0]
self.fire(write(sock, value.value))
def _close(self, sock):
if sock is None:
return
if sock != self._sock and sock not in self._clients:
return
self._poller.discard(sock)
if sock in self._buffers:
del self._buffers[sock]
if sock in self._clients:
self._clients.remove(sock)
else:
self._sock = None
try:
sock.shutdown(2)
except SocketError:
pass
try:
sock.close()
except SocketError:
pass
self.fire(disconnect(sock))
@handler("close")
def close(self, sock=None):
is_closed = sock is None
if sock is None:
socks = [self._sock]
socks.extend(self._clients[:])
else:
socks = [sock]
for sock in socks:
if not self._buffers[sock]:
self._close(sock)
elif sock not in self._closeq:
self._closeq.append(sock)
if is_closed:
self.fire(closed())
def _read(self, sock):
if sock not in self._clients:
return
try:
data = sock.recv(self._bufsize)
if data:
self.fire(read(sock, data)).notify = True
else:
self.close(sock)
except SocketError as e:
if e.args[0] == EWOULDBLOCK:
return
else:
self.fire(error(sock, e))
self._close(sock)
def _write(self, sock, data):
if sock not in self._clients:
return
try:
nbytes = sock.send(data)
if nbytes < len(data):
self._buffers[sock].appendleft(data[nbytes:])
except SocketError as e:
if e.args[0] not in (EINTR, EWOULDBLOCK, ENOBUFS):
self.fire(error(sock, e))
self._close(sock)
else:
self._buffers[sock].appendleft(data)
@handler("write")
def write(self, sock, data):
if not self._poller.isWriting(sock):
self._poller.addWriter(self, sock)
self._buffers[sock].append(data)
def _accept(self): # noqa
# XXX: C901: This has a high McCacbe complexity score of 10.
# TODO: Refactor this!
def on_done(sock, host):
sock.setblocking(False)
self._poller.addReader(self, sock)
self._clients.append(sock)
self.fire(connect(sock, *host))
def on_error(sock, err):
self.fire(error(sock, err))
self._close(sock)
try:
newsock, host = self._sock.accept()
except SocketError as e:
if e.args[0] in (EWOULDBLOCK, EAGAIN):
return
elif e.args[0] == EPERM:
# Netfilter on Linux may have rejected the
# connection, but we get told to try to accept()
# anyway.
return
elif e.args[0] in (EMFILE, ENOBUFS, ENFILE, ENOMEM, ECONNABORTED):
# Linux gives EMFILE when a process is not allowed
# to allocate any more file descriptors. *BSD and
# Win32 give (WSA)ENOBUFS. Linux can also give
# ENFILE if the system is out of inodes, or ENOMEM
# if there is insufficient memory to allocate a new
# dentry. ECONNABORTED is documented as possible on
# both Linux and Windows, but it is not clear
# whether there are actually any circumstances under
# which it can happen (one might expect it to be
# possible if a client sends a FIN or RST after the
# server sends a SYN|ACK but before application code
# calls accept(2), however at least on Linux this
# _seems_ to be short-circuited by syncookies.
return
else:
raise
if self.secure and HAS_SSL:
sslsock = ssl_socket(
newsock,
server_side=True,
keyfile=self.keyfile,
ca_certs=self.ca_certs,
certfile=self.certfile,
cert_reqs=self.cert_reqs,
ssl_version=self.ssl_version,
do_handshake_on_connect=False
)
for _ in do_handshake(sslsock, on_done, on_error, extra_args=(host,)):
yield
else:
on_done(newsock, host)
@handler("_disconnect", priority=1)
def _on_disconnect(self, sock):
self._close(sock)
@handler("_read", priority=1)
def _on_read(self, sock):
if sock == self._sock:
return self._accept()
else:
self._read(sock)
@handler("_write", priority=1)
def _on_write(self, sock):
if self._buffers[sock]:
data = self._buffers[sock].popleft()
self._write(sock, data)
if not self._buffers[sock]:
if sock in self._closeq:
self._closeq.remove(sock)
self._close(sock)
elif self._poller.isWriting(sock):
self._poller.removeWriter(sock)
class Serial(Component):
channel = "serial"
def __init__(self, port, baudrate=115200, bufsize=BUFSIZE,
timeout=TIMEOUT, channel=channel):
super(Serial, self).__init__(channel=channel)
if serial is None:
raise RuntimeError("No serial support available")
self._port = port
self._baudrate = baudrate
self._bufsize = bufsize
self._serial = None
self._poller = None
self._buffer = deque()
self._closeflag = False
@handler("ready")
def _on_ready(self, component):
self.fire(_open(), self.channel)
@handler("_open")
def _on_open(self, port=None, baudrate=None, bufsize=None):
self._port = port or self._port
self._baudrate = baudrate or self._baudrate
self._bufsize = bufsize or self._bufsize
self._serial = serial.Serial(
port=self._port, baudrate=self._baudrate, timeout=0)
self._fd = self._serial.fileno() # not portable!
self._poller.addReader(self, self._fd)
self.fire(opened(self._port, self._baudrate))
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if self._closeflag:
return
self._poller.discard(self._fd)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._serial.close()
except:
pass
self.fire(closed())
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
data = self._serial.read(self._bufsize)
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
if data:
self.fire(read(data)).notify = True
except (OSError, IOError) as e:
self.fire(error(e))
self._close()
def _write(self, data):
try:
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
try:
nbytes = self._serial.write(data)
except (serial.SerialTimeoutException) as e:
nbytes = 0
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except (OSError, IOError) as e:
self.fire(error(e))
self._close()
def write(self, data):
if self._poller is not None and not self._poller.isWriting(self._fd):
self._poller.addWriter(self, self._fd)
self._buffer.append(data)
@handler("_disconnect")
def __on_disconnect(self, sock):
self._close()
@handler("_read")
def __on_read(self, sock):
self._read()
@handler("_write")
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._fd):
self._poller.removeWriter(self._fd)
class File(Component):
channel = "file"
def init(self, filename, mode="r", bufsize=BUFSIZE, encoding=None,
channel=channel):
self._mode = mode
self._bufsize = bufsize
self._filename = filename
self._encoding = encoding or getdefaultencoding()
self._fd = None
self._poller = None
self._buffer = deque()
self._closeflag = False
@property
def closed(self):
return getattr(self._fd, "closed", True) \
if hasattr(self, "_fd") else True
@property
def filename(self):
return getattr(self, "_filename", None)
@property
def mode(self):
return getattr(self, "_mode", None)
@handler("ready")
def _on_ready(self, component):
self.fire(_open(), self.channel)
@handler("_open")
def _on_open(self, filename=None, mode=None, bufsize=None):
self._filename = filename or self._filename
self._bufsize = bufsize or self._bufsize
self._mode = mode or self._mode
if isinstance(self._filename, string_types[0]):
kwargs = {"encoding": self._encoding} if PY3 else {}
self._fd = open(self.filename, self.mode, **kwargs)
else:
self._fd = self._filename
self._mode = self._fd.mode
self._filename = self._fd.name
self._encoding = getattr(self._fd, "encoding", self._encoding)
if fcntl is not None:
# Set non-blocking file descriptor (non-portable)
flag = fcntl.fcntl(self._fd, fcntl.F_GETFL)
flag = flag | O_NONBLOCK
fcntl.fcntl(self._fd, fcntl.F_SETFL, flag)
if "r" in self.mode or "+" in self.mode:
self._poller.addReader(self, self._fd)
self.fire(opened(self.filename, self.mode))
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if self.closed:
return
self._poller.discard(self._fd)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._fd.close()
except:
pass
self.fire(closed())
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
data = fd_read(self._fd.fileno(), self._bufsize)
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
if data:
self.fire(read(data)).notify = True
else:
self.fire(eof())
if not any(m in self.mode for m in ("a", "+")):
self.close()
else:
self._poller.discard(self._fd)
except (OSError, IOError) as e:
if e.args[0] in (EWOULDBLOCK, EINTR):
return
else:
self.fire(error(e))
self._close()
def seek(self, offset, whence=0):
self._fd.seek(offset, whence)
def _write(self, data):
try:
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
nbytes = fd_write(self._fd.fileno(), data)
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except (OSError, IOError) as e:
if e.args[0] in (EWOULDBLOCK, EINTR):
return
else:
self.fire(error(e))
self._close()
def write(self, data):
if self._poller is not None and not self._poller.isWriting(self._fd):
self._poller.addWriter(self, self._fd)
self._buffer.append(data)
@handler("_disconnect")
def __on_disconnect(self, sock):
self._close()
@handler("_read")
def __on_read(self, sock):
self._read()
@handler("_write")
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._fd):
self._poller.removeWriter(self._fd)
class File(Component):
channel = "file"
def init(self, filename, mode="r", bufsize=BUFSIZE, encoding=None,
channel=channel):
self._mode = mode
self._bufsize = bufsize
self._filename = filename
self._encoding = encoding or getdefaultencoding()
self._fd = None
self._poller = None
self._buffer = deque()
self._closeflag = False
@property
def closed(self):
return getattr(self._fd, "closed", True) \
if hasattr(self, "_fd") else True
@property
def filename(self):
return getattr(self, "_filename", None)
@property
def mode(self):
return getattr(self, "_mode", None)
@handler("ready")
def _on_ready(self, component):
self.fire(_open(), self.channel)
@handler("_open")
def _on_open(self, filename=None, mode=None, bufsize=None):
self._filename = filename or self._filename
self._bufsize = bufsize or self._bufsize
self._mode = mode or self._mode
if isinstance(self._filename, string_types[0]):
kwargs = {"encoding": self._encoding} if PY3 else {}
self._fd = open(self.filename, self.mode, **kwargs)
else:
self._fd = self._filename
self._mode = self._fd.mode
self._filename = self._fd.name
self._encoding = getattr(self._fd, "encoding", self._encoding)
if fcntl is not None:
# Set non-blocking file descriptor (non-portable)
flag = fcntl.fcntl(self._fd, fcntl.F_GETFL)
flag = flag | O_NONBLOCK
fcntl.fcntl(self._fd, fcntl.F_SETFL, flag)
if "r" in self.mode or "+" in self.mode:
self._poller.addReader(self, self._fd)
self.fire(opened(self.filename, self.mode))
@handler("registered", "started", channel="*")
def _on_registered_or_started(self, component, manager=None):
if self._poller is None:
if isinstance(component, BasePoller):
self._poller = component
self.fire(ready(self))
else:
if component is not self:
return
component = findcmp(self.root, BasePoller)
if component is not None:
self._poller = component
self.fire(ready(self))
else:
self._poller = Poller().register(self)
self.fire(ready(self))
@handler("stopped", channel="*")
def _on_stopped(self, component):
self.fire(close())
@handler("prepare_unregister", channel="*")
def _on_prepare_unregister(self, event, c):
if event.in_subtree(self):
self._close()
def _close(self):
if self.closed:
return
self._poller.discard(self._fd)
self._buffer.clear()
self._closeflag = False
self._connected = False
try:
self._fd.close()
except:
pass
self.fire(closed())
def close(self):
if not self._buffer:
self._close()
elif not self._closeflag:
self._closeflag = True
def _read(self):
try:
data = fd_read(self._fd.fileno(), self._bufsize)
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
if data:
self.fire(read(data)).notify = True
else:
self.fire(eof())
if not any(m in self.mode for m in ("a", "+")):
self.close()
else:
self._poller.discard(self._fd)
except (OSError, IOError) as e:
if e.args[0] in (EWOULDBLOCK, EINTR):
return
else:
self.fire(error(e))
self._close()
def seek(self, offset, whence=0):
self._fd.seek(offset, whence)
def _write(self, data):
try:
if not isinstance(data, binary_type):
data = data.encode(self._encoding)
nbytes = fd_write(self._fd.fileno(), data)
if nbytes < len(data):
self._buffer.appendleft(data[nbytes:])
except (OSError, IOError) as e:
if e.args[0] in (EWOULDBLOCK, EINTR):
return
else:
self.fire(error(e))
self._close()
def write(self, data):
if self._poller is not None and not self._poller.isWriting(self._fd):
self._poller.addWriter(self, self._fd)
self._buffer.append(data)
@handler("_disconnect")
def __on_disconnect(self, sock):
self._close()
@handler("_read")
def __on_read(self, sock):
self._read()
@handler("_write")
def __on_write(self, sock):
if self._buffer:
data = self._buffer.popleft()
self._write(data)
if not self._buffer:
if self._closeflag:
self._close()
elif self._poller.isWriting(self._fd):
self._poller.removeWriter(self._fd)