/usr/share/pyshared/circuits/node/client.py is in python-circuits 2.1.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Date: ...
# Author: ...
"""Client
...
"""
from weakref import WeakValueDictionary
from circuits import handler, BaseComponent
from circuits.net.sockets import Close, Connect, TCPClient, Write
from .utils import dump_event, load_value
DELIMITER = b"\r\n\r\n"
class Client(BaseComponent):
"""Client
...
"""
channel = "node"
def __init__(self, host, port, channel=channel):
super(Client, self).__init__(channel=channel)
self._host = host
self._port = port
self._nid = 0
self._buffer = b""
self._values = WeakValueDictionary()
TCPClient(channel=self.channel).register(self)
self.fire(Connect(self._host, self._port))
def process(self, packet):
v, id, errors = load_value(packet)
if id in self._values:
value = self._values[id]
value.value = v
value.errors = errors
def close(self):
self.fire(Close())
def connect(self, host, port):
self.fire(Connect(host, port))
def send(self, event, e):
id = self._nid
self._nid += 1
self._values[id] = event.value
data = dump_event(e, id)
packet = data.encode("utf-8") + DELIMITER
self.fire(Write(packet))
@handler("read")
def _on_read(self, data):
self._buffer += data
delimiter = self._buffer.find(DELIMITER)
if delimiter > 0:
packet = self._buffer[:delimiter].decode("utf-8")
self._buffer = self._buffer[(delimiter + len(DELIMITER)):]
self.process(packet)
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