class BufferedIXPSocket:
__IXP_START = "<?xml version"
__IXP_END = "</IXP>"
__client = None # type: SocketClient
__callbacks = [] # type: List[]
__buffer = '' # type: str
def __init__(self, host: str, port: int):
self.__client = SocketClient(host, port)
self.__client.register_callback(self._message_received)
self.__client.connect()
def stop(self):
self.__client.close()
def register_callback(self, callback: callable):
self.__callbacks.append(callback)
def send(self, ixpFile: IXPFile):
self.__client.write(ixpFile.get_xml())
def _message_received(self, data: str):
self.__buffer += data
self.__search_buffer()
def _internal_callback(self, ixpFile: IXPFile, *largs):
for callback in self.__callbacks:
callback(ixpFile)
def __search_buffer(self):
bufferLength = len(self.__buffer)
for startIndex in range(0, bufferLength - len(self.__IXP_START) - len(self.__IXP_END) + 1):
startSub = self.__buffer[startIndex:startIndex + len(self.__IXP_START)]
if startSub != self.__IXP_START:
continue
for endIndex in range(startIndex + len(self.__IXP_START), bufferLength - len(self.__IXP_END) + 1):
endSub = self.__buffer[endIndex:endIndex + len(self.__IXP_END)]
if endSub != self.__IXP_END:
continue
xml = self.__buffer[startIndex : endIndex + len(self.__IXP_END)]
self.__remove_from_buffer(startIndex, endIndex + len(self.__IXP_END))
self.__found_message(xml)
self.__search_buffer()
return
def __remove_from_buffer(self, start: int, end: int):
before = self.__buffer[0:start]
after = self.__buffer[end + 1:len(self.__buffer)]
self.__buffer = before + after
def __found_message(self, data: str):
ixp = IXPFile(source = data)
kivy.clock.ClockBase.schedule_once(kivy.clock.Clock, partial(self._internal_callback, ixp))
def __init__(self, host: str, port: int):
self.__client = SocketClient(host, port)
self.__client.register_callback(self._message_received)
self.__client.connect()