110 lines
3.6 KiB
Python
Executable File
110 lines
3.6 KiB
Python
Executable File
#!/bin/env python3
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import sys
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from os.path import dirname, abspath
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sys.path.append(dirname(dirname(dirname(abspath(__file__)))))
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import asyncio
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import click
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from libp2p.libp2p import Libp2p
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from network.multiaddr import MultiAddr
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# TODO: change once muxed_connection supports extracting protocol id from messages
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PROTOCOL_ID = '/echo/1.0.0'
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async def read_data(stream):
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while True:
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read_string = (await stream.read()).decode()
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if not read_string:
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return
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if read_string != "\n":
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# Green console colour: \x1b[32m
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# Reset console colour: \x1b[0m
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print("\x1b[32m%s\x1b[0m" % read_string)
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async def write_data(stream):
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loop = asyncio.get_event_loop()
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while True:
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line = await loop.run_in_executor(None, sys.stdin.readline)
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await stream.write(line.encode())
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async def run(port, destination):
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if not destination:
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lib = Libp2p(transport_opt=["/ip4/127.0.0.1/tcp/%s/p2p/hostA" % port])
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host = await lib.new_node()
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async def stream_handler(stream):
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asyncio.ensure_future(read_data(stream))
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asyncio.ensure_future(write_data(stream))
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host.set_stream_handler(PROTOCOL_ID, stream_handler)
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port = None
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for listener in host.network.listeners.values():
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for addr in listener.get_addrs():
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addr_dict = addr.to_options()
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if addr_dict['transport'] == 'tcp':
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port = addr_dict['port']
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break
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if not port:
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raise RuntimeError("was not able to find the actual local port")
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print("Run './chat.py --port %s -d /ip4/127.0.0.1/tcp/%s/p2p/%s' on another console.\n" % (int(port)+1, port, host.get_id().pretty()))
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print("You can replace 127.0.0.1 with public IP as well.")
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print("\nWaiting for incoming connection\n\n")
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else:
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lib = Libp2p(transport_opt=["/ip4/127.0.0.1/tcp/%s/p2p/hostB" % port])
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host = await lib.new_node()
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# TODO: improve multiaddr module to have proper function to do this
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multiaddr = MultiAddr(destination)
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ss = multiaddr.get_multiaddr_string().split('/')
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peer_id = ss[-1]
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addr = '/'.join(ss[:-2])
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# Associate the peer with local ip address (see default parameters of Libp2p())
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host.get_peerstore().add_addr(peer_id, addr, 10)
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# Start a stream with the destination.
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# Multiaddress of the destination peer is fetched from the peerstore using 'peerId'.
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stream = await host.new_stream(peer_id, PROTOCOL_ID)
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asyncio.ensure_future(read_data(stream))
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asyncio.ensure_future(write_data(stream))
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@click.command()
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@click.option('--port', help='source port number', default=8000)
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@click.option('--destination', '-d', help="Destination multiaddr string")
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@click.option('--help', is_flag=True, default=False, help='display help')
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# @click.option('--debug', is_flag=True, default=False, help='Debug generates the same node ID on every execution')
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def main(port, destination, help):
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if help:
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print("This program demonstrates a simple p2p chat application using libp2p\n\n")
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print("Usage: Run './chat -sp <SOURCE_PORT>' where <SOURCE_PORT> can be any port number.")
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print("Now run './chat -d <MULTIADDR>' where <MULTIADDR> is multiaddress of previous listener host.")
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return
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loop = asyncio.get_event_loop()
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try:
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asyncio.ensure_future(run(port, destination))
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loop.run_forever()
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except KeyboardInterrupt:
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pass
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finally:
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loop.close()
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if __name__ == '__main__':
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main()
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