Created
June 5, 2022 15:01
-
-
Save alfonsrv/97d23b4d2e7ceb328f5fc6e7fb7d4478 to your computer and use it in GitHub Desktop.
asyncio Man-in-the-Middle Proxy – allowing for bidirectional streaming
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
""" | |
Bidirectional asyncio TCP man-in-the-middle proxy | |
allowing for both serverside- and clientside-triggered | |
network events. | |
github/alfonsrv, 2022 | |
Licensed under Mozilla Public License 2.0 | |
""" | |
import asyncio | |
REMOTE_SERVER = '10.100.30.199' | |
SERVER_BIND = '127.0.0.1' | |
SERVER_PORT = 7001 | |
class AsyncioProxy: | |
client_writer = None | |
server_writer = None | |
client_peer = None # tuple | |
async def _receive(self, reader, prefix: str) -> Tuple[bytes, int]: | |
data = await reader.read(100) | |
print(f'[{prefix}] Received: {data}') | |
return data.decode('utf-8') | |
async def _receive_client(self, reader): | |
while True: | |
data = await self._receive(reader=reader, prefix='C') | |
await self._send_server(message=data) | |
async def _receive_server(self, reader): | |
while True: | |
data = await self._receive(reader=reader, prefix='S') | |
await self._send_client(data) | |
async def _send_client(self, message: str): | |
""" Sends/forwards data from server to client """ | |
print(f'Sending to Client: {message}') | |
self.client_writer.write(message) | |
async def _send_server(self, message: str): | |
""" Sends/forwards data to server """ | |
print(f'Sending to Server: {message}') | |
self.server_writer.write(message) | |
async def _handle_client(self, server_reader, server_writer): | |
self.client_peer = server_writer.get_extra_info("peername") | |
print(f'Connection from {self.client_peer}') | |
client_reader, client_writer = await asyncio.open_connection( | |
REMOTE_SERVER, | |
SERVER_PORT | |
) | |
print(f'Established connection to {REMOTE_SERVER}:{SERVER_PORT}') | |
self.client_writer = client_writer | |
self.server_writer = server_writer | |
loop = asyncio.get_event_loop() | |
loop.create_task(self._receive_client(reader=client_reader)) | |
loop.create_task(self._receive_server(reader=server_reader)) | |
async def start_serving(self): | |
await asyncio.start_server(self._handle_client, SERVER_BIND, SERVER_PORT) | |
if __name__ == '__main__': | |
loop = asyncio.get_event_loop() | |
server = AsyncioProxy() | |
loop.run_until_complete(server.start_serving()) | |
loop.run_forever() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment