mirror of
https://github.com/varun-r-mallya/py-libp2p.git
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feat: implement WebSocket transport with transport registry system - Add transport_registry.py for centralized transport management - Integrate WebSocket transport with new registry - Add comprehensive test suite for transport registry - Include WebSocket examples and demos - Update transport initialization and swarm integration
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acul71
208
examples/websocket/test_tcp_echo.py
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208
examples/websocket/test_tcp_echo.py
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#!/usr/bin/env python3
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"""
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Simple TCP echo demo to verify basic libp2p functionality.
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"""
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import argparse
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import logging
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import sys
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import traceback
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import multiaddr
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import trio
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from libp2p.crypto.secp256k1 import create_new_key_pair
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from libp2p.custom_types import TProtocol
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from libp2p.host.basic_host import BasicHost
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from libp2p.network.swarm import Swarm
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from libp2p.peer.id import ID
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from libp2p.peer.peerinfo import info_from_p2p_addr
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from libp2p.peer.peerstore import PeerStore
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from libp2p.security.insecure.transport import InsecureTransport, PLAINTEXT_PROTOCOL_ID
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from libp2p.stream_muxer.yamux.yamux import Yamux
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from libp2p.transport.upgrader import TransportUpgrader
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from libp2p.transport.tcp.tcp import TCP
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# Enable debug logging
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logging.basicConfig(level=logging.DEBUG)
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logger = logging.getLogger("libp2p.tcp-example")
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# Simple echo protocol
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ECHO_PROTOCOL_ID = TProtocol("/echo/1.0.0")
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async def echo_handler(stream):
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"""Simple echo handler that echoes back any data received."""
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try:
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data = await stream.read(1024)
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if data:
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message = data.decode('utf-8', errors='replace')
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print(f"📥 Received: {message}")
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print(f"📤 Echoing back: {message}")
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await stream.write(data)
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await stream.close()
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except Exception as e:
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logger.error(f"Echo handler error: {e}")
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await stream.close()
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def create_tcp_host():
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"""Create a host with TCP transport."""
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# Create key pair and peer store
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key_pair = create_new_key_pair()
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peer_id = ID.from_pubkey(key_pair.public_key)
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peer_store = PeerStore()
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peer_store.add_key_pair(peer_id, key_pair)
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# Create transport upgrader with plaintext security
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upgrader = TransportUpgrader(
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secure_transports_by_protocol={
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TProtocol(PLAINTEXT_PROTOCOL_ID): InsecureTransport(key_pair)
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},
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muxer_transports_by_protocol={TProtocol("/yamux/1.0.0"): Yamux},
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)
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# Create TCP transport
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transport = TCP()
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# Create swarm and host
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swarm = Swarm(peer_id, peer_store, upgrader, transport)
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host = BasicHost(swarm)
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return host
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async def run(port: int, destination: str) -> None:
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localhost_ip = "0.0.0.0"
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if not destination:
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# Create first host (listener) with TCP transport
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listen_addr = multiaddr.Multiaddr(f"/ip4/{localhost_ip}/tcp/{port}")
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try:
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host = create_tcp_host()
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logger.debug("Created TCP host")
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# Set up echo handler
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host.set_stream_handler(ECHO_PROTOCOL_ID, echo_handler)
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async with host.run(listen_addrs=[listen_addr]), trio.open_nursery() as nursery:
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# Start the peer-store cleanup task
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nursery.start_soon(host.get_peerstore().start_cleanup_task, 60)
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# Get the actual address and replace 0.0.0.0 with 127.0.0.1 for client
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# connections
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addrs = host.get_addrs()
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logger.debug(f"Host addresses: {addrs}")
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if not addrs:
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print("❌ Error: No addresses found for the host")
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return
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server_addr = str(addrs[0])
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client_addr = server_addr.replace("/ip4/0.0.0.0/", "/ip4/127.0.0.1/")
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print("🌐 TCP Server Started Successfully!")
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print("=" * 50)
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print(f"📍 Server Address: {client_addr}")
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print(f"🔧 Protocol: /echo/1.0.0")
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print(f"🚀 Transport: TCP")
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print()
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print("📋 To test the connection, run this in another terminal:")
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print(f" python test_tcp_echo.py -d {client_addr}")
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print()
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print("⏳ Waiting for incoming TCP connections...")
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print("─" * 50)
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await trio.sleep_forever()
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except Exception as e:
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print(f"❌ Error creating TCP server: {e}")
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traceback.print_exc()
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return
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else:
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# Create second host (dialer) with TCP transport
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listen_addr = multiaddr.Multiaddr(f"/ip4/{localhost_ip}/tcp/{port}")
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try:
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# Create a single host for client operations
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host = create_tcp_host()
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# Start the host for client operations
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async with host.run(listen_addrs=[listen_addr]), trio.open_nursery() as nursery:
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# Start the peer-store cleanup task
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nursery.start_soon(host.get_peerstore().start_cleanup_task, 60)
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maddr = multiaddr.Multiaddr(destination)
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info = info_from_p2p_addr(maddr)
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print("🔌 TCP Client Starting...")
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print("=" * 40)
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print(f"🎯 Target Peer: {info.peer_id}")
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print(f"📍 Target Address: {destination}")
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print()
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try:
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print("🔗 Connecting to TCP server...")
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await host.connect(info)
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print("✅ Successfully connected to TCP server!")
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except Exception as e:
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error_msg = str(e)
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print(f"\n❌ Connection Failed!")
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print(f" Peer ID: {info.peer_id}")
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print(f" Address: {destination}")
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print(f" Error: {error_msg}")
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return
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# Create a stream and send test data
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try:
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stream = await host.new_stream(info.peer_id, [ECHO_PROTOCOL_ID])
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except Exception as e:
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print(f"❌ Failed to create stream: {e}")
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return
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try:
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print("🚀 Starting Echo Protocol Test...")
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print("─" * 40)
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# Send test data
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test_message = b"Hello TCP Transport!"
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print(f"📤 Sending message: {test_message.decode('utf-8')}")
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await stream.write(test_message)
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# Read response
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print("⏳ Waiting for server response...")
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response = await stream.read(1024)
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print(f"📥 Received response: {response.decode('utf-8')}")
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await stream.close()
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print("─" * 40)
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if response == test_message:
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print("🎉 Echo test successful!")
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print("✅ TCP transport is working perfectly!")
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else:
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print("❌ Echo test failed!")
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except Exception as e:
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print(f"Echo protocol error: {e}")
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traceback.print_exc()
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print("✅ TCP demo completed successfully!")
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except Exception as e:
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print(f"❌ Error creating TCP client: {e}")
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traceback.print_exc()
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return
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def main() -> None:
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description = "Simple TCP echo demo for libp2p"
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parser = argparse.ArgumentParser(description=description)
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parser.add_argument("-p", "--port", default=0, type=int, help="source port number")
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parser.add_argument("-d", "--destination", type=str, help="destination multiaddr string")
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args = parser.parse_args()
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try:
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trio.run(run, args.port, args.destination)
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except KeyboardInterrupt:
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pass
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if __name__ == "__main__":
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main()
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