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100 lines
2.6 KiB
100 lines
2.6 KiB
import json
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import sys
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from threading import Thread
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from signalr.events import EventHook
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from signalr.hubs import Hub
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from signalr.transports import AutoTransport
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class Connection:
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protocol_version = '1.5'
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def __init__(self, url, session):
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self.url = url
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self.__hubs = {}
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self.qs = {}
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self.__send_counter = -1
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self.token = None
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self.id = None
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self.data = None
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self.received = EventHook()
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self.error = EventHook()
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self.starting = EventHook()
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self.stopping = EventHook()
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self.exception = EventHook()
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self.is_open = False
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self.__transport = AutoTransport(session, self)
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self.__listener_thread = None
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self.started = False
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def handle_error(**kwargs):
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error = kwargs["E"] if "E" in kwargs else None
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if error is None:
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return
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self.error.fire(error)
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self.received += handle_error
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self.starting += self.__set_data
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def __set_data(self):
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self.data = json.dumps([{'name': hub_name} for hub_name in self.__hubs])
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def increment_send_counter(self):
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self.__send_counter += 1
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return self.__send_counter
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def start(self):
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self.starting.fire()
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negotiate_data = self.__transport.negotiate()
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self.token = negotiate_data['ConnectionToken']
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self.id = negotiate_data['ConnectionId']
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listener = self.__transport.start()
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def wrapped_listener():
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while self.is_open:
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try:
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listener()
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except:
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self.exception.fire(*sys.exc_info())
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self.is_open = False
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self.is_open = True
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self.__listener_thread = Thread(target=wrapped_listener)
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self.__listener_thread.start()
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self.started = True
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def wait(self, timeout=30):
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Thread.join(self.__listener_thread, timeout)
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def send(self, data):
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self.__transport.send(data)
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def close(self):
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self.is_open = False
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self.__listener_thread.join()
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self.__transport.close()
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def register_hub(self, name):
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if name not in self.__hubs:
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if self.started:
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raise RuntimeError(
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'Cannot create new hub because connection is already started.')
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self.__hubs[name] = Hub(name, self)
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return self.__hubs[name]
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def hub(self, name):
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return self.__hubs[name]
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def __enter__(self):
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self.start()
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self.close()
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