84 lines
3.0 KiB
Python
84 lines
3.0 KiB
Python
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import asyncio
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from .transport_interface import ITransport
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from .listener_interface import IListener
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class TCP(ITransport):
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def __init__(self):
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self.listener = self.Listener()
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class Listener(IListener):
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def __init__(self, handler_function=None):
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self.multiaddrs = []
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self.server = None
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self.handler = staticmethod(handler_function)
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def listen(self, multiaddr):
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"""
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put listener in listening mode and wait for incoming connections
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:param multiaddr: multiaddr of peer
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:return: return True if successful
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"""
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# TODO check for exceptions
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_multiaddr = multiaddr
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if "ipfs" in multiaddr.get_protocols():
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# ipfs_id = multiaddr.get_ipfs_id()
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_multiaddr = multiaddr.remove_protocol("ipfs")
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self.multiaddrs.append(_multiaddr)
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_multiaddr_dict = _multiaddr.to_dict()
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_loop = asyncio.get_event_loop()
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_coroutine = asyncio.start_server(self.handler, _multiaddr_dict.host,\
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_multiaddr_dict.port, loop=_loop)
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self.server = _loop.run_until_complete(_coroutine)
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return True
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def get_addrs(self):
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"""
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retrieve list of addresses the listener is listening on
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:return: return list of addrs
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"""
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# TODO check if server is listening
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return self.multiaddrs
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def close(self, options=None):
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"""
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close the listener such that no more connections
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can be open on this transport instance
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:param options: optional object potential with timeout
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a timeout value in ms that fires and destroy all connections
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:return: return True if successful
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"""
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if self.server is None:
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return False
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self.server.close()
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_loop = asyncio.get_event_loop()
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_loop.run_until_complete(self.server.wait_closed())
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_loop.close()
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self.server = None
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return True
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def dial(self, multiaddr, options=None):
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"""
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dial a transport to peer listening on multiaddr
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:param multiaddr: multiaddr of peer
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:param options: optional object
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:return: True if successful
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"""
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_multiaddr_dict = multiaddr.to_dict()
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reader, writer = await asyncio.open_connection(_multiaddr_dict.host,\
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_multiaddr_dict.port)
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return False
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# TODO dial behavior not fully understood
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def create_listener(self, handler_function, options=None):
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"""
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create listener on transport
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:param options: optional object with properties the listener must have
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:param handler_function: a function called when a new conntion is received
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that takes a connection as argument which implements interface-connection
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:return: a listener object that implements listener_interface.py
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"""
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return self.Listener(handler_function)
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