esphome/esphomeyaml/api/client.py

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from datetime import datetime
import functools
import logging
import socket
import threading
import time
# pylint: disable=unused-import
from typing import Optional # noqa
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from google.protobuf import message # noqa
from esphomeyaml import const
import esphomeyaml.api.api_pb2 as pb
from esphomeyaml.const import CONF_PASSWORD, CONF_PORT
from esphomeyaml.core import EsphomeyamlError
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from esphomeyaml.helpers import resolve_ip_address, indent, color
from esphomeyaml.util import safe_print
_LOGGER = logging.getLogger(__name__)
class APIConnectionError(EsphomeyamlError):
pass
MESSAGE_TYPE_TO_PROTO = {
1: pb.HelloRequest,
2: pb.HelloResponse,
3: pb.ConnectRequest,
4: pb.ConnectResponse,
5: pb.DisconnectRequest,
6: pb.DisconnectResponse,
7: pb.PingRequest,
8: pb.PingResponse,
9: pb.DeviceInfoRequest,
10: pb.DeviceInfoResponse,
11: pb.ListEntitiesRequest,
12: pb.ListEntitiesBinarySensorResponse,
13: pb.ListEntitiesCoverResponse,
14: pb.ListEntitiesFanResponse,
15: pb.ListEntitiesLightResponse,
16: pb.ListEntitiesSensorResponse,
17: pb.ListEntitiesSwitchResponse,
18: pb.ListEntitiesTextSensorResponse,
19: pb.ListEntitiesDoneResponse,
20: pb.SubscribeStatesRequest,
21: pb.BinarySensorStateResponse,
22: pb.CoverStateResponse,
23: pb.FanStateResponse,
24: pb.LightStateResponse,
25: pb.SensorStateResponse,
26: pb.SwitchStateResponse,
27: pb.TextSensorStateResponse,
28: pb.SubscribeLogsRequest,
29: pb.SubscribeLogsResponse,
30: pb.CoverCommandRequest,
31: pb.FanCommandRequest,
32: pb.LightCommandRequest,
33: pb.SwitchCommandRequest,
34: pb.SubscribeServiceCallsRequest,
35: pb.ServiceCallResponse,
36: pb.GetTimeRequest,
37: pb.GetTimeResponse,
}
def _varuint_to_bytes(value):
if value <= 0x7F:
return chr(value)
ret = bytes()
while value:
temp = value & 0x7F
value >>= 7
if value:
ret += chr(temp | 0x80)
else:
ret += chr(temp)
return ret
def _bytes_to_varuint(value):
result = 0
bitpos = 0
for c in value:
val = ord(c)
result |= (val & 0x7F) << bitpos
bitpos += 7
if (val & 0x80) == 0:
return result
return None
# pylint: disable=too-many-instance-attributes,not-callable
class APIClient(threading.Thread):
def __init__(self, address, port, password):
threading.Thread.__init__(self)
self._address = address # type: str
self._port = port # type: int
self._password = password # type: Optional[str]
self._socket = None # type: Optional[socket.socket]
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self._socket_open_event = threading.Event()
self._socket_write_lock = threading.Lock()
self._connected = False
self._authenticated = False
self._message_handlers = []
self._keepalive = 5
self._ping_timer = None
self._refresh_ping()
self.on_disconnect = None
self.on_connect = None
self.on_login = None
self.auto_reconnect = False
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self._running_event = threading.Event()
self._stop_event = threading.Event()
@property
def stopped(self):
return self._stop_event.is_set()
def _refresh_ping(self):
if self._ping_timer is not None:
self._ping_timer.cancel()
self._ping_timer = None
def func():
self._ping_timer = None
if self._connected:
try:
self.ping()
except APIConnectionError:
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self._fatal_error()
else:
self._refresh_ping()
self._ping_timer = threading.Timer(self._keepalive, func)
self._ping_timer.start()
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def _cancel_ping(self):
if self._ping_timer is not None:
self._ping_timer.cancel()
self._ping_timer = None
def _close_socket(self):
self._cancel_ping()
if self._socket is not None:
self._socket.close()
self._socket = None
self._socket_open_event.clear()
self._connected = False
self._authenticated = False
self._message_handlers = []
def stop(self, force=False):
if self.stopped:
raise ValueError
if self._connected and not force:
try:
self.disconnect()
except APIConnectionError:
pass
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self._close_socket()
self._stop_event.set()
if not force:
self.join()
def connect(self):
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if not self._running_event.wait(0.1):
raise APIConnectionError("You need to call start() first!")
if self._connected:
raise APIConnectionError("Already connected!")
try:
ip = resolve_ip_address(self._address)
except EsphomeyamlError as err:
_LOGGER.warning("Error resolving IP address of %s. Is it connected to WiFi?",
self._address)
_LOGGER.warning("(If this error persists, please set a static IP address: "
"https://esphomelib.com/esphomeyaml/components/wifi.html#manual-ips)")
raise APIConnectionError(err)
_LOGGER.info("Connecting to %s:%s (%s)", self._address, self._port, ip)
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self._socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self._socket.settimeout(10.0)
self._socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)
try:
self._socket.connect((ip, self._port))
except socket.error as err:
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self._fatal_error()
raise APIConnectionError("Error connecting to {}: {}".format(ip, err))
self._socket.settimeout(0.1)
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self._socket_open_event.set()
hello = pb.HelloRequest()
hello.client_info = 'esphomeyaml v{}'.format(const.__version__)
try:
resp = self._send_message_await_response(hello, pb.HelloResponse)
except APIConnectionError as err:
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self._fatal_error()
raise err
_LOGGER.debug("Successfully connected to %s ('%s' API=%s.%s)", self._address,
resp.server_info, resp.api_version_major, resp.api_version_minor)
self._connected = True
if self.on_connect is not None:
self.on_connect()
def _check_connected(self):
if not self._connected:
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self._fatal_error()
raise APIConnectionError("Must be connected!")
def login(self):
self._check_connected()
if self._authenticated:
raise APIConnectionError("Already logged in!")
connect = pb.ConnectRequest()
if self._password is not None:
connect.password = self._password
resp = self._send_message_await_response(connect, pb.ConnectResponse)
if resp.invalid_password:
raise APIConnectionError("Invalid password!")
self._authenticated = True
if self.on_login is not None:
self.on_login()
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def _fatal_error(self):
was_connected = self._connected
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self._close_socket()
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if was_connected and self.on_disconnect is not None:
self.on_disconnect()
def _write(self, data): # type: (bytes) -> None
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if self._socket is None:
raise APIConnectionError("Socket closed")
_LOGGER.debug("Write: %s", ' '.join('{:02X}'.format(ord(x)) for x in data))
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with self._socket_write_lock:
try:
self._socket.sendall(data)
except socket.error as err:
self._fatal_error()
raise APIConnectionError("Error while writing data: {}".format(err))
def _send_message(self, msg):
# type: (message.Message) -> None
for message_type, klass in MESSAGE_TYPE_TO_PROTO.iteritems():
if isinstance(msg, klass):
break
else:
raise ValueError
encoded = msg.SerializeToString()
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_LOGGER.debug("Sending %s:\n%s", type(msg), indent(unicode(msg)))
req = chr(0x00)
req += _varuint_to_bytes(len(encoded))
req += _varuint_to_bytes(message_type)
req += encoded
self._write(req)
self._refresh_ping()
def _send_message_await_response_complex(self, send_msg, do_append, do_stop, timeout=1):
event = threading.Event()
responses = []
def on_message(resp):
if do_append(resp):
responses.append(resp)
if do_stop(resp):
event.set()
self._message_handlers.append(on_message)
self._send_message(send_msg)
ret = event.wait(timeout)
try:
self._message_handlers.remove(on_message)
except ValueError:
pass
if not ret:
raise APIConnectionError("Timeout while waiting for message response!")
return responses
def _send_message_await_response(self, send_msg, response_type, timeout=1):
def is_response(msg):
return isinstance(msg, response_type)
return self._send_message_await_response_complex(send_msg, is_response, is_response,
timeout)[0]
def device_info(self):
self._check_connected()
return self._send_message_await_response(pb.DeviceInfoRequest(), pb.DeviceInfoResponse)
def ping(self):
self._check_connected()
return self._send_message_await_response(pb.PingRequest(), pb.PingResponse)
def disconnect(self):
self._check_connected()
try:
self._send_message_await_response(pb.DisconnectRequest(), pb.DisconnectResponse)
except APIConnectionError:
pass
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self._close_socket()
if self.on_disconnect is not None:
self.on_disconnect()
def _check_authenticated(self):
if not self._authenticated:
raise APIConnectionError("Must login first!")
def subscribe_logs(self, on_log, log_level=None, dump_config=False):
self._check_authenticated()
def on_msg(msg):
if isinstance(msg, pb.SubscribeLogsResponse):
on_log(msg)
self._message_handlers.append(on_msg)
req = pb.SubscribeLogsRequest(dump_config=dump_config)
if log_level is not None:
req.level = log_level
self._send_message(req)
def _recv(self, amount):
ret = bytes()
if amount == 0:
return ret
while len(ret) < amount:
if self.stopped:
raise APIConnectionError("Stopped!")
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if not self._socket_open_event.is_set():
raise APIConnectionError("No socket!")
try:
val = self._socket.recv(amount - len(ret))
except AttributeError:
raise APIConnectionError("Socket was closed")
except socket.timeout:
continue
except socket.error as err:
raise APIConnectionError("Error while receiving data: {}".format(err))
ret += val
return ret
def _recv_varint(self):
raw = bytes()
while not raw or ord(raw[-1]) & 0x80:
raw += self._recv(1)
return _bytes_to_varuint(raw)
def _run_once(self):
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if not self._socket_open_event.wait(0.1):
return
# Preamble
if ord(self._recv(1)[0]) != 0x00:
raise APIConnectionError("Invalid preamble")
length = self._recv_varint()
msg_type = self._recv_varint()
raw_msg = self._recv(length)
if msg_type not in MESSAGE_TYPE_TO_PROTO:
_LOGGER.debug("Skipping message type %s", msg_type)
return
msg = MESSAGE_TYPE_TO_PROTO[msg_type]()
msg.ParseFromString(raw_msg)
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_LOGGER.debug("Got message: %s:\n%s", type(msg), indent(str(msg)))
for msg_handler in self._message_handlers[:]:
msg_handler(msg)
self._handle_internal_messages(msg)
self._refresh_ping()
def run(self):
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self._running_event.set()
while not self.stopped:
try:
self._run_once()
except APIConnectionError as err:
if self.stopped:
break
if self._connected:
_LOGGER.error("Error while reading incoming messages: %s", err)
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self._fatal_error()
self._running_event.clear()
def _handle_internal_messages(self, msg):
if isinstance(msg, pb.DisconnectRequest):
self._send_message(pb.DisconnectResponse())
if self._socket is not None:
self._socket.close()
self._socket = None
self._connected = False
if self.on_disconnect is not None:
self.on_disconnect()
elif isinstance(msg, pb.PingRequest):
self._send_message(pb.PingResponse())
elif isinstance(msg, pb.GetTimeRequest):
resp = pb.GetTimeResponse()
resp.epoch_seconds = int(time.time())
self._send_message(resp)
def run_logs(config, address):
conf = config['api']
port = conf[CONF_PORT]
password = conf[CONF_PASSWORD]
_LOGGER.info("Starting log output from %s using esphomelib API", address)
cli = APIClient(address, port, password)
stopping = False
retry_timer = []
def try_connect(tries=0, is_disconnect=True):
if stopping:
return
if is_disconnect:
_LOGGER.warning(u"Disconnected from API.")
while retry_timer:
retry_timer.pop(0).cancel()
try:
cli.connect()
cli.login()
except APIConnectionError as error:
pass
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else:
_LOGGER.info("Successfully connected to %s", address)
return
wait_time = min(2**tries, 300)
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_LOGGER.warning(u"Couldn't connect to API (%s). Trying to reconnect in %s seconds",
error, wait_time)
timer = threading.Timer(wait_time, functools.partial(try_connect, tries + 1, is_disconnect))
timer.start()
retry_timer.append(timer)
def on_log(msg):
time_ = datetime.now().time().strftime(u'[%H:%M:%S]')
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text = msg.message
if msg.send_failed:
text = color('white', '(Message skipped because it was too big to fit in '
'TCP buffer - This is only cosmetic)')
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safe_print(time_ + text)
has_connects = []
def on_login():
try:
cli.subscribe_logs(on_log, dump_config=not has_connects)
has_connects.append(True)
except APIConnectionError:
cli.disconnect()
cli.on_disconnect = try_connect
cli.on_login = on_login
cli.start()
try:
try_connect(is_disconnect=False)
while True:
time.sleep(1)
except KeyboardInterrupt:
stopping = True
cli.stop(True)
while retry_timer:
retry_timer.pop(0).cancel()
return 0