121 lines
3.7 KiB
Python
Executable file
121 lines
3.7 KiB
Python
Executable file
#!/usr/bin/env python3
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import asyncio
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import websockets
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import hashlib
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import random
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import os
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import sys
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import conn
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LOCALHOST = '::1'
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DEFAULT_LISTEN_PORT = 6443
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WEBSOCKET_URL = 'ws://localhost:9999'
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async def handle_client(socket_reader, socket_writer):
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socket_id = random.randint(0, 9000)
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async with websockets.connect(WEBSOCKET_URL) as websocket:
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try:
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print(f"New client connected socket {socket_id}")
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m = conn.WSMsg(socket_id, conn.MsgType.CONNECT)
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print(f'TCP>WS: {m}')
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await websocket.send(m.to_bytes())
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# Forwarding data from client to WebSocket
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async def client_to_websocket():
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while True:
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data = await socket_reader.read(2024)
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if not data:
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c = conn.WSMsg(socket_id, conn.MsgType.DISCONNECT)
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print(f"Client {socket_id} disconnected")
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print(f'TCP>WS: {c}')
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await websocket.send(c.to_bytes())
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break
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c = conn.WSMsg(socket_id, conn.MsgType.DATA, data)
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print(f'TCP>WS: {c}')
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await websocket.send(c.to_bytes())
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# Forwarding data from WebSocket to client
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async def websocket_to_client():
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while True:
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message = await websocket.recv()
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c = conn.WSMsg.from_bytes(message)
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# XXX this is ugly, because it means that the data is sent twice or more if 2+ connections..
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print('c.socketid', c.socketid, 'socket_id', socket_id)
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if c.socketid == socket_id:
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print('ours')
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if c.msg == conn.MsgType.DISCONNECT:
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print(f"Client {socket_id} disconnected")
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break
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elif c.msg == conn.MsgType.CONNECT:
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## This shouldn't really happen‽
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break
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else:
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print(f'WS>TCP: {c}')
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socket_writer.write(c.payload)
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await socket_writer.drain()
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else:
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print('not ours')
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print(f'WS>TCP@{socket_id}: ', hashlib.md5(message).hexdigest(), 'skipping')
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# Run both tasks concurrently
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await asyncio.gather(client_to_websocket(), websocket_to_client())
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print(f">>>> Client {socket_id} disconnected")
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finally:
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print(f">>>>>>>>>> Closing client {socket_id}")
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m = conn.WSMsg(socket_id, conn.MsgType.DISCONNECT)
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await websocket.send(m.to_bytes())
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socket_writer.close()
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await socket_writer.wait_closed()
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def get_config():
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KUBE_API_PORT = os.environ.get('KUBE_API_PORT', DEFAULT_LISTEN_PORT)
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if len(sys.argv) != 2:
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print(f"Usage: {sys.argv[0]} <websocket_url>")
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sys.exit(1)
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ws_url = sys.argv[1]
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global WEBSOCKET_URL
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# Yeah, I know this is fugly
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WEBSOCKET_URL = ws_url
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return {
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'kube_api_port': KUBE_API_PORT,
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'websocket_url': ws_url,
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}
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async def main():
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cfg = get_config()
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try:
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server = await asyncio.start_server(handle_client, LOCALHOST, cfg['kube_api_port'])
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except OSError as e:
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print(e)
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print(f"There already is a client listening on port {cfg['kube_api_port']}")
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sys.exit(1)
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async with server:
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print(f"Server started on {LOCALHOST} port {cfg['kube_api_port']}")
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await server.serve_forever()
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if __name__ == "__main__":
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asyncio.run(main())
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