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|
import asyncio
import logging
import ssl
import typing
from contextlib import contextmanager
from multiprocessing import Process
from anyio import create_tcp_listener
from anyio.streams.tls import TLSListener
from tests.utils import cancel_all_tasks, cancel_tasks, wait_until_connectable
from tiny_proxy import HttpProxyHandler, Socks5ProxyHandler, Socks4ProxyHandler
class ProxyConfig(typing.NamedTuple):
proxy_type: str
host: str
port: int
username: typing.Optional[str] = None
password: typing.Optional[str] = None
ssl_certfile: typing.Optional[str] = None
ssl_keyfile: typing.Optional[str] = None
def to_dict(self):
d = {}
for key, val in self._asdict().items():
if val is not None:
d[key] = val
return d
class ProxyServer:
cls_map = {
'http': HttpProxyHandler,
'socks4': Socks4ProxyHandler,
'socks5': Socks5ProxyHandler,
}
def __init__(self, config: typing.Iterable[ProxyConfig], loop: asyncio.AbstractEventLoop):
self.loop = loop
self.config = config
self.logger = logging.getLogger(__name__)
self.server_tasks = []
def run(self):
proxies = self.config
for proxy in proxies:
server_task = self.loop.create_task(self._listen(**proxy.to_dict()))
self.server_tasks.append(server_task)
def run_forever(self):
self.run()
self.loop.run_forever()
def shutdown(self):
print('Shutting down...')
cancel_tasks(self.server_tasks, self.loop)
cancel_all_tasks(self.loop)
self.loop.run_until_complete(self.loop.shutdown_asyncgens())
try:
self.loop.run_until_complete(self.loop.shutdown_default_executor())
except AttributeError: # pragma: no cover
pass # shutdown_default_executor is new to Python 3.9
self.loop.close()
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
return self.shutdown()
async def _listen(
self,
proxy_type,
host,
port,
ssl_certfile=None,
ssl_keyfile=None,
**kwargs,
):
handler_cls = self.cls_map.get(proxy_type)
if not handler_cls:
raise RuntimeError(f'Unsupported type: {proxy_type}')
if ssl_certfile and ssl_keyfile:
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
ssl_context.load_cert_chain(ssl_certfile, ssl_keyfile)
else:
ssl_context = None
print(f'Starting {proxy_type} proxy on {host}:{port}...')
handler = handler_cls(**kwargs)
listener = await create_tcp_listener(local_host=host, local_port=port)
if ssl_context is not None:
listener = TLSListener(listener=listener, ssl_context=ssl_context)
async with listener:
await listener.serve(handler.handle)
def _start_proxy_server(config: typing.Iterable[ProxyConfig]):
import asyncio
loop = asyncio.new_event_loop()
asyncio.set_event_loop(loop)
server = ProxyServer(config=config, loop=loop)
try:
server.run_forever()
except (KeyboardInterrupt, SystemExit):
pass
finally:
server.shutdown()
class ProxyServerRunner:
def __init__(self, config: typing.Iterable[ProxyConfig]):
self.config = config
self.process = None
def run(self):
"""
https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-use-multiprocessing-process
or use Thread
"""
try:
from pytest_cov.embed import cleanup_on_sigterm # noqa
except ImportError:
pass
else:
cleanup_on_sigterm()
self.process = Process(target=_start_proxy_server, kwargs=dict(config=self.config))
self.process.daemon = True
self.process.start()
def shutdown(self):
self.process.terminate()
@contextmanager
def start_proxy_server(config: ProxyConfig):
"""
https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-use-multiprocessing-process
or use Thread
"""
try:
from pytest_cov.embed import cleanup_on_sigterm # noqa
except ImportError:
pass
else:
cleanup_on_sigterm()
process = Process(target=_start_proxy_server, kwargs=dict(config=[config]))
# process = Thread(target=_start_proxy_server, kwargs=dict(config=[config]))
process.daemon = True
process.start()
wait_until_connectable(host=config.host, port=config.port)
try:
yield None
finally:
process.terminate()
process.join()
pass
|
