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implement TPLinkSmartHomeProtocol.query with asyncio

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This commit is contained in:
Bas Nijholt 2019-11-11 16:52:13 +01:00
parent 59424d2738
commit 8f59d74e29
1 changed files with 13 additions and 19 deletions
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32
pyHS100/protocol.py
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@ -1,3 +1,4 @@
import asyncio
import json import json
import socket import socket
import struct import struct
@ -25,7 +26,9 @@ class TPLinkSmartHomeProtocol:
DEFAULT_TIMEOUT = 5 DEFAULT_TIMEOUT = 5
@staticmethod @staticmethod
def query(host: str, request: Union[str, Dict], port: int = DEFAULT_PORT) -> Any: async def query(
host: str, request: Union[str, Dict], port: int = DEFAULT_PORT
) -> Any:
"""Request information from a TP-Link SmartHome Device. """Request information from a TP-Link SmartHome Device.
:param str host: host name or ip address of the device :param str host: host name or ip address of the device
@ -38,12 +41,13 @@ class TPLinkSmartHomeProtocol:
request = json.dumps(request) request = json.dumps(request)
timeout = TPLinkSmartHomeProtocol.DEFAULT_TIMEOUT timeout = TPLinkSmartHomeProtocol.DEFAULT_TIMEOUT
sock = None writer = None
try: try:
sock = socket.create_connection((host, port), timeout) task = asyncio.open_connection(host, port)
reader, writer = await asyncio.wait_for(task, timeout=timeout)
_LOGGER.debug("> (%i) %s", len(request), request) _LOGGER.debug("> (%i) %s", len(request), request)
sock.send(TPLinkSmartHomeProtocol.encrypt(request)) writer.write(TPLinkSmartHomeProtocol.encrypt(request))
await writer.drain()
buffer = bytes() buffer = bytes()
# Some devices send responses with a length header of 0 and # Some devices send responses with a length header of 0 and
@ -51,26 +55,16 @@ class TPLinkSmartHomeProtocol:
# will hang if we attempt to read more data. # will hang if we attempt to read more data.
length = -1 length = -1
while True: while True:
chunk = sock.recv(4096) chunk = await reader.read(4096)
if length == -1: if length == -1:
length = struct.unpack(">I", chunk[0:4])[0] length = struct.unpack(">I", chunk[0:4])[0]
buffer += chunk buffer += chunk
if (length > 0 and len(buffer) >= length + 4) or not chunk: if (length > 0 and len(buffer) >= length + 4) or not chunk:
break break
finally: finally:
try: if writer:
if sock: writer.close()
sock.shutdown(socket.SHUT_RDWR) await writer.wait_closed()
except OSError:
# OSX raises OSError when shutdown() gets called on a closed
# socket. We ignore it here as the data has already been read
# into the buffer at this point.
pass
finally:
if sock:
sock.close()
response = TPLinkSmartHomeProtocol.decrypt(buffer[4:]) response = TPLinkSmartHomeProtocol.decrypt(buffer[4:])
_LOGGER.debug("< (%i) %s", len(response), response) _LOGGER.debug("< (%i) %s", len(response), response)