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import struct
import tornado.ioloop
import tornado.stack_context
from imc.proxy import Connection
def send_pack(stream,data):
stream.write(struct.pack('l',len(data)) + data)
def recv_pack(stream,callback):
def _recv_size(data):
size, = struct.unpack('l',data)
stream.read_bytes(size,lambda data : callback(data))
stream.read_bytes(8,_recv_size)
class SocketConnection(Connection):
def __init__(self,linkclass,linkid,stream):
super().__init__(linkclass,linkid)
self.ioloop = tornado.ioloop.IOLoop.current()
self.stream = stream
self.stream.set_close_callback(self.close)
self._start_ping()
def send_msg(self,data):
self.stream.write(struct.pack('l',len(data)) + data)
def start_recv(self,recv_callback):
def _recv_size(data):
size, = struct.unpack('l',data)
if size > 0:
self.stream.read_bytes(size,_recv_data)
else:
if size == -1: #pong
self._ping_delay = 0
self.stream.read_bytes(8,_recv_size)
def _recv_data(data):
self._recv_callback(self,data)
self.stream.read_bytes(8,_recv_size)
self._recv_callback = tornado.stack_context.wrap(recv_callback)
self.stream.read_bytes(8,_recv_size)
def close(self):
try:
self._ping_timer.stop()
except AttributeError:
pass
super().close()
def _start_ping(self):
def __check():
self.stream.write(struct.pack('l',-1))
self._ping_delay += 1
if self._ping_delay > 10:
self.close()
self._ping_timer = tornado.ioloop.PeriodicCallback(__check,1000)
self._ping_timer.start()
self._ping_delay = 0
class WebSocketConnection(Connection):
def __init__(self,linkclass,linkid,handler):
super().__init__(linkclass,linkid)
self.ioloop = tornado.ioloop.IOLoop.current()
self.handler = handler
def send_msg(self,data):
self.handler.write_message(data,True)
def recv_msg(self,data):
self._recv_callback(self,data)
def start_recv(self,recv_callback):
self._recv_callback = tornado.stack_context.wrap(recv_callback)
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