55 lines
1.7 KiB
Python
55 lines
1.7 KiB
Python
from contextlib import suppress
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import asyncio
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import multiaddr
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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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async def connect(node1, node2):
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"""
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Connect node1 to node2
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"""
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addr = node2.get_addrs()[0]
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info = info_from_p2p_addr(addr)
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await node1.connect(info)
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assert node1.get_id() in node2.get_network().connections
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assert node2.get_id() in node1.get_network().connections
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async def cleanup():
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pending = asyncio.all_tasks()
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for task in pending:
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task.cancel()
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# Now we should await task to execute it's cancellation.
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# Cancelled task raises asyncio.CancelledError that we can suppress:
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with suppress(asyncio.CancelledError):
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await task
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async def set_up_nodes_by_transport_opt(transport_opt_list):
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nodes_list = []
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for transport_opt in transport_opt_list:
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node = await new_node(transport_opt=transport_opt)
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await node.get_network().listen(multiaddr.Multiaddr(transport_opt[0]))
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nodes_list.append(node)
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return tuple(nodes_list)
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async def echo_stream_handler(stream):
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while True:
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read_string = (await stream.read()).decode()
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resp = "ack:" + read_string
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await stream.write(resp.encode())
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async def perform_two_host_set_up_custom_handler(handler):
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transport_opt_list = [["/ip4/127.0.0.1/tcp/0"], ["/ip4/127.0.0.1/tcp/0"]]
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(node_a, node_b) = await set_up_nodes_by_transport_opt(transport_opt_list)
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node_b.set_stream_handler("/echo/1.0.0", handler)
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# Associate the peer with local ip address (see default parameters of Libp2p())
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node_a.get_peerstore().add_addrs(node_b.get_id(), node_b.get_addrs(), 10)
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return node_a, node_b
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