140 lines
4.9 KiB
Python
140 lines
4.9 KiB
Python
# -*- coding: utf-8 -*-
|
|
"""
|
|
proxy.py
|
|
~~~~~~~~
|
|
⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
|
|
Network monitoring, controls & Application development, testing, debugging.
|
|
|
|
:copyright: (c) 2013-present by Abhinav Singh and contributors.
|
|
:license: BSD, see LICENSE for more details.
|
|
"""
|
|
import logging
|
|
import multiprocessing
|
|
import multiprocessing.synchronize
|
|
import selectors
|
|
import socket
|
|
import threading
|
|
|
|
from multiprocessing import connection
|
|
from multiprocessing.reduction import send_handle, recv_handle
|
|
from typing import Optional, Type, Tuple
|
|
|
|
from .work import Work
|
|
from .threadless import Threadless
|
|
|
|
from ..connection import TcpClientConnection
|
|
from ..event import EventQueue, eventNames
|
|
from ...common.flags import Flags
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class Acceptor(multiprocessing.Process):
|
|
"""Socket server acceptor process.
|
|
|
|
Accepts client connection over received server socket handle at startup. Spawns a separate
|
|
thread to handle each client request. However, when `--threadless` is enabled, Acceptor also
|
|
pre-spawns a `Threadless` process at startup. Accepted client connections are passed to
|
|
`Threadless` process which internally uses asyncio event loop to handle client connections.
|
|
"""
|
|
|
|
def __init__(
|
|
self,
|
|
idd: int,
|
|
work_queue: connection.Connection,
|
|
flags: Flags,
|
|
work_klass: Type[Work],
|
|
lock: multiprocessing.synchronize.Lock,
|
|
event_queue: Optional[EventQueue] = None) -> None:
|
|
super().__init__()
|
|
self.idd = idd
|
|
self.work_queue: connection.Connection = work_queue
|
|
self.flags = flags
|
|
self.work_klass = work_klass
|
|
self.lock = lock
|
|
self.event_queue = event_queue
|
|
|
|
self.running = multiprocessing.Event()
|
|
self.selector: Optional[selectors.DefaultSelector] = None
|
|
self.sock: Optional[socket.socket] = None
|
|
self.threadless_process: Optional[Threadless] = None
|
|
self.threadless_client_queue: Optional[connection.Connection] = None
|
|
|
|
def start_threadless_process(self) -> None:
|
|
pipe = multiprocessing.Pipe()
|
|
self.threadless_client_queue = pipe[0]
|
|
self.threadless_process = Threadless(
|
|
client_queue=pipe[1],
|
|
flags=self.flags,
|
|
work_klass=self.work_klass,
|
|
event_queue=self.event_queue
|
|
)
|
|
self.threadless_process.start()
|
|
logger.debug('Started process %d', self.threadless_process.pid)
|
|
|
|
def shutdown_threadless_process(self) -> None:
|
|
assert self.threadless_process and self.threadless_client_queue
|
|
logger.debug('Stopped process %d', self.threadless_process.pid)
|
|
self.threadless_process.running.set()
|
|
self.threadless_process.join()
|
|
self.threadless_client_queue.close()
|
|
|
|
def start_work(self, conn: socket.socket, addr: Tuple[str, int]) -> None:
|
|
if self.flags.threadless and \
|
|
self.threadless_client_queue and \
|
|
self.threadless_process:
|
|
self.threadless_client_queue.send(addr)
|
|
send_handle(
|
|
self.threadless_client_queue,
|
|
conn.fileno(),
|
|
self.threadless_process.pid
|
|
)
|
|
conn.close()
|
|
else:
|
|
work = self.work_klass(
|
|
TcpClientConnection(conn, addr),
|
|
flags=self.flags,
|
|
event_queue=self.event_queue
|
|
)
|
|
work_thread = threading.Thread(target=work.run)
|
|
work_thread.daemon = True
|
|
work.publish_event(
|
|
event_name=eventNames.WORK_STARTED,
|
|
event_payload={'fileno': conn.fileno(), 'addr': addr},
|
|
publisher_id=self.__class__.__name__
|
|
)
|
|
work_thread.start()
|
|
|
|
def run_once(self) -> None:
|
|
with self.lock:
|
|
assert self.selector and self.sock
|
|
events = self.selector.select(timeout=1)
|
|
if len(events) == 0:
|
|
return
|
|
conn, addr = self.sock.accept()
|
|
self.start_work(conn, addr)
|
|
|
|
def run(self) -> None:
|
|
self.selector = selectors.DefaultSelector()
|
|
fileno = recv_handle(self.work_queue)
|
|
self.work_queue.close()
|
|
self.sock = socket.fromfd(
|
|
fileno,
|
|
family=self.flags.family,
|
|
type=socket.SOCK_STREAM
|
|
)
|
|
try:
|
|
self.selector.register(self.sock, selectors.EVENT_READ)
|
|
if self.flags.threadless:
|
|
self.start_threadless_process()
|
|
while not self.running.is_set():
|
|
self.run_once()
|
|
except KeyboardInterrupt:
|
|
pass
|
|
finally:
|
|
self.selector.unregister(self.sock)
|
|
if self.flags.threadless:
|
|
self.shutdown_threadless_process()
|
|
self.sock.close()
|
|
logger.debug('Acceptor#%d shutdown', self.idd)
|