100 lines
3.1 KiB
Python
Executable File
100 lines
3.1 KiB
Python
Executable File
import asyncio
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import sys
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import click
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from libp2p import new_node
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from libp2p.peer.peerinfo import info_from_p2p_addr
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PROTOCOL_ID = '/chat/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, end="")
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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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host = await new_node(transport_opt=["/ip4/127.0.0.1/tcp/%s" % port])
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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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port = int(addr.value_for_protocol('tcp'))
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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 './examples/chat/chat.py --port %s -d /ip4/127.0.0.1/tcp/%s/p2p/%s' on another console.\n" %
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(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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host = await new_node(transport_opt=["/ip4/127.0.0.1/tcp/%s" % port])
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m = multiaddr.Multiaddr(destination)
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info = info_from_p2p_addr(m)
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# Associate the peer with local ip address
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await host.connect(info)
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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(info.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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print("Already connected to peer %s" % info.addrs[0])
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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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