134 lines
3.6 KiB
Python
134 lines
3.6 KiB
Python
try:
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import ujson as json
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except:
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import json
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import time
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import zlib
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from kivy.logger import Logger
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from kivy.event import EventDispatcher
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from kivy.clock import Clock
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from appPublic.udp_comm import UdpComm
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from appPublic.dataencoder import DataEncoder
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class UdpWidget(EventDispatcher):
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def __init__(self, udp_port=55000, cert_file=None, commands=[],
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**kw):
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super(UdpWidget, self).__init__(**kw)
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self.udp_port = udp_port
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self.commands = commands
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self.block_commands = []
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self.udp_transport = UdpComm(udp_port, self.comm_callback)
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host = self.udp_transport.host
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self.dataencoder = DataEncoder(host, self.get_peer_pubkey)
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self.inner_handlers = {
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'get_pubkey':self.resp_pubkey,
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'set_pubkey':self.set_pubkey
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}
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for cmd in self.commands:
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evt_name = 'on_%s' % cmd
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setattr(self, evt_name, self.my_event_handler)
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self.register_event_type(evt_name)
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# print('udp_widget.py:register', evt_name, self.my_event_handler)
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self.get_peer_pubkey()
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Clock.schedule_once(self.get_peer_pubkey_loop, 2)
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def block_command(self, cmd):
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if cmd not in self.command:
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return
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if cmd in self.block_command:
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return
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self.block_commands.append(cmd)
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def unblock_command(self, cmd):
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if cmd not in self.block_command:
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return
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self.block_commands = [ c for c in self.block_command if c!=cmd ]
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def get_peer_pubkey_loop(self, t):
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self.get_peer_pubkey()
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def get_peer_pubkey(self, peer_id=None, timeout=1):
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# print('get_peer_pubkey(), called..')
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d = {
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'c':'get_pubkey',
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'd':{
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'pubkey':self.dataencoder.my_text_publickey()
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}
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}
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bd = self.dataencoder.pack('none', d, uncrypt=True)
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self.udp_transport.broadcast(bd)
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if peer_id is None:
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# print('get_peer_pubkey():return')
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return
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t = t1 = time.time()
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t1 += timeout
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while t1 > t:
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time.sleep(0.1)
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t = time.time()
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if self.dataencoder.exist_peer_publickeys(peer_id):
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return self.dataencder.public_keys[peer_id]
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raise Exception('timeout')
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def comm_callback(self, data, addr):
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# print('comm_callback():', data, 'addr=', addr)
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d = self.dataencoder.unpack(addr[0], data)
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if d is None:
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# print('comm_callback(): d is None')
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return
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if not isinstance(d, dict):
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# print('comm_callback(): d is not a dict data')
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return
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# print('received: data=', d)
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cmd = d['c']
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f = self.inner_handlers.get(cmd)
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if f:
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f(d, addr)
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# print('comm_callback():inner callback called(),', cmd)
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return
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if cmd in self.block_commands:
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# print('comm_callback():', cmd, 'is blocked')
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return
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evt_name = 'on_%s' % cmd
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evt_data = {
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'd': d,
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'addr': addr
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}
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# print('udp_widget.py dispatch', evt_name, evt_data)
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self.dispatch(evt_name, evt_data)
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def my_event_handler(self, *args):
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pass
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def set_pubkey(self, data, addr):
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pk = data['d']['pubkey']
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id = addr[0]
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# print('set_pubkey(): ', id, pk)
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self.dataencoder.set_peer_text_pubkey(id, pk)
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def resp_pubkey(self, data, addr):
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self.set_pubkey(data, addr)
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# print('resp_pubkey():', addr[0])
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data = {
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'c':'set_pubkey',
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'd':{
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'pubkey':self.dataencoder.my_text_publickey()
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}
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}
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self.send(addr[0], data, uncrypt=True)
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def broadcast(self, data):
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for peer in self.dataencoder.public_keys.keys():
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self.send(peer, data)
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def send(self, peer_id, data, uncrypt=False):
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# print('send():', peer_id, data)
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d = self.dataencoder.pack(peer_id, data, uncrypt=uncrypt)
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addr = (peer_id, self.udp_port)
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self.udp_transport.send(d, addr)
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def stop(self):
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self.udp_transport.stop()
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