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Updated examples to automatically use random port (#661)

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* updated examples to automatically use random port

* Refactor examples to use shared utils for port selection (#1)

---------

Co-authored-by: acul71 <34693171+acul71@users.noreply.github.com>
This commit is contained in:
Abhinav Agarwalla
2025-06-10 00:29:11 +05:30
committed by GitHub
parent c83fc1582d
commit 4e9fa87477
6 changed files with 24 additions and 60 deletions
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15
examples/identify/identify.py
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@ -61,20 +61,20 @@ async def run(port: int, destination: str) -> None:
async with host_a.run(listen_addrs=[listen_addr]):
print(
"First host listening. Run this from another console:\n\n"
f"identify-demo -p {int(port) + 1} "
f"-d /ip4/{localhost_ip}/tcp/{port}/p2p/{host_a.get_id().pretty()}\n"
f"identify-demo "
f"-d {host_a.get_addrs()[0]}\n"
)
print("Waiting for incoming identify request...")
await trio.sleep_forever()
else:
# Create second host (dialer)
print(f"dialer (host_b) listening on /ip4/{localhost_ip}/tcp/{port}")
listen_addr = multiaddr.Multiaddr(f"/ip4/{localhost_ip}/tcp/{port}")
host_b = new_host()
async with host_b.run(listen_addrs=[listen_addr]):
# Connect to the first host
print(f"dialer (host_b) listening on {host_b.get_addrs()[0]}")
maddr = multiaddr.Multiaddr(destination)
info = info_from_p2p_addr(maddr)
print(f"Second host connecting to peer: {info.peer_id}")
@ -104,13 +104,11 @@ def main() -> None:
"""
example_maddr = (
"/ip4/127.0.0.1/tcp/8888/p2p/QmQn4SwGkDZkUEpBRBvTmheQycxAHJUNmVEnjA2v1qe8Q"
"/ip4/127.0.0.1/tcp/8888/p2p/QmQn4SwGkDZKkUEpBRBvTmheQycxAHJUNmVEnjA2v1qe8Q"
)
parser = argparse.ArgumentParser(description=description)
parser.add_argument(
"-p", "--port", default=8888, type=int, help="source port number"
)
parser.add_argument("-p", "--port", default=0, type=int, help="source port number")
parser.add_argument(
"-d",
"--destination",
@ -119,9 +117,6 @@ def main() -> None:
)
args = parser.parse_args()
if not args.port:
raise RuntimeError("failed to determine local port")
try:
trio.run(run, *(args.port, args.destination))
except KeyboardInterrupt: