76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
# -*- coding: utf-8 -*-
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"""
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proxy.py
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~~~~~~~~
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⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
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Network monitoring, controls & Application development, testing, debugging.
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:copyright: (c) 2013-present by Abhinav Singh and contributors.
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:license: BSD, see LICENSE for more details.
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"""
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import time
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import socket
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import selectors
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from typing import Dict
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from proxy.core.acceptor import AcceptorPool, Work
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from proxy.common.flags import Flags
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from proxy.common.types import Readables, Writables
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class EchoServerHandler(Work):
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"""EchoServerHandler implements Work interface.
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An instance of EchoServerHandler is created for each client
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connection. EchoServerHandler lifecycle is controlled by
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Threadless core using asyncio. Implementation must provide
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get_events and handle_events method. Optionally, also implement
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intialize, is_inactive and shutdown method.
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"""
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def get_events(self) -> Dict[socket.socket, int]:
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# We always want to read from client
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# Register for EVENT_READ events
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events = {self.client.connection: selectors.EVENT_READ}
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# If there is pending buffer for client
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# also register for EVENT_WRITE events
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if self.client.has_buffer():
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events[self.client.connection] |= selectors.EVENT_WRITE
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return events
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def handle_events(
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self,
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readables: Readables,
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writables: Writables) -> bool:
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"""Return True to shutdown work."""
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if self.client.connection in readables:
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data = self.client.recv()
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if data is None:
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# Client closed connection, signal shutdown
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return True
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# Queue data back to client
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self.client.queue(data)
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if self.client.connection in writables:
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self.client.flush()
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return False
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def main() -> None:
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# This example requires `threadless=True`
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pool = AcceptorPool(
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flags=Flags(num_workers=1, threadless=True),
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work_klass=EchoServerHandler)
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try:
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pool.setup()
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while True:
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time.sleep(1)
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finally:
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pool.shutdown()
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if __name__ == '__main__':
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main()
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