def __init__(self, host=None, port=None, type=None, parent=None):
super().__init__(parent)
mcast_addr = host
mcast_port = port
type = type
self.statusLabel = QLabel("Listening for broadcasted messages")
quitButton = QPushButton("&Quit")
self.udpSocket = QUdpSocket(self)
dstAddress = QHostAddress()
dstAddress.setAddress(mcast_addr)
self.udpSocket.bind(dstAddress, mcast_port)
self.udpSocket.readyRead.connect(self.processPendingDatagrams)
quitButton.clicked.connect(self.close)
buttonLayout = QHBoxLayout()
buttonLayout.addStretch(1)
buttonLayout.addWidget(quitButton)
buttonLayout.addStretch(1)
mainLayout = QVBoxLayout()
mainLayout.addWidget(self.statusLabel)
mainLayout.addLayout(buttonLayout)
self.setLayout(mainLayout)
self.setWindowTitle("Broadcast Receiver")
def __init__(self, params={}, parent=None):
'''
Constructor
'''
super(UdpDevice, self).__init__(params, parent)
self.iodevice = QUdpSocket()
self.reconnect = int(params.get('Reconnect', 1000))
self.host = params.get('Host', None)
self.port = int(params.get('Port', 2000))
self.iodevice.readyRead.connect(self.readyRead)
self.buffer = bytearray()
class UdpDevice(DataDevice):
'''
Implementation of a UDP server socket
'''
readyRead = pyqtSignal()
def __init__(self, params={}, parent=None):
'''
Constructor
'''
super(UdpDevice, self).__init__(params, parent)
self.iodevice = QUdpSocket()
self.reconnect = int(params.get('Reconnect', 1000))
self.host = params.get('Host', None)
self.port = int(params.get('Port', 2000))
self.iodevice.readyRead.connect(self.readyRead)
self.buffer = bytearray()
def connectDevice(self):
result = False
if self.host is None:
result = self.iodevice.bind(self.port)
else:
ha = QHostAddress(self.host)
result = self.iodevice.bind(ha, self.port)
if result is False:
if self.reconnect > 0:
QTimer.singleShot(self.reconnect, self.onReconnectTimer)
else:
self.deviceConnected.emit(True)
def disconnectDevice(self):
if self.iodevice.state() is QAbstractSocket.BoundState:
self.iodevice.disconnectFromHost()
self.deviceDisconnected.emit(True)
def readData(self):
(data, ha, port) = self.iodevice.readDatagram(self.iodevice.pendingDatagramSize())
self.remoteHost = ha.toString()
self.remotePort = port
return data
def readLine(self):
if self.iodevice.hasPendingDatagrams():
self.buffer.extend(self.readData())
try:
i = self.buffer.index(b'\n')
data = self.buffer[0:i]
del self.buffer[0:i + 1]
return data.decode()
except UnicodeDecodeError:
return '<decode error>'
except ValueError:
return ''
class UDPClient(QDialog):
def __init__(self, host=None, port=None, type=None, parent=None):
super().__init__(parent)
mcast_addr = host
mcast_port = port
type = type
self.statusLabel = QLabel("Listening for broadcasted messages")
quitButton = QPushButton("&Quit")
self.udpSocket = QUdpSocket(self)
dstAddress = QHostAddress()
dstAddress.setAddress(mcast_addr)
self.udpSocket.bind(dstAddress, mcast_port)
self.udpSocket.readyRead.connect(self.processPendingDatagrams)
quitButton.clicked.connect(self.close)
buttonLayout = QHBoxLayout()
buttonLayout.addStretch(1)
buttonLayout.addWidget(quitButton)
buttonLayout.addStretch(1)
mainLayout = QVBoxLayout()
mainLayout.addWidget(self.statusLabel)
mainLayout.addLayout(buttonLayout)
self.setLayout(mainLayout)
self.setWindowTitle("Broadcast Receiver")
def processPendingDatagrams(self):
while self.udpSocket.hasPendingDatagrams():
datagram, host, port = self.udpSocket.readDatagram(
self.udpSocket.pendingDatagramSize())
buf = QBuffer()
b = buf.write(self.udpSocket.readAll())
buf.seek(buf.pos() - b)
image = QImage()
image.loadFromData(buf.buffer())
image.save(r"D:\test.png")