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import os
import asyncio
import threading
from aiosmtpd.smtp import SMTP
from public import public
from typing import Any, Dict
@public
class Controller:
def __init__(self, handler, loop=None, hostname=None, port=8025, *,
ready_timeout=1.0, enable_SMTPUTF8=True, ssl_context=None,
server_kwargs: Dict[str, Any] = None):
"""
`Documentation can be found here
<http://aiosmtpd.readthedocs.io/en/latest/aiosmtpd\
/docs/controller.html#controller-api>`_.
"""
self.handler = handler
self.hostname = '::1' if hostname is None else hostname
self.port = port
self.enable_SMTPUTF8 = enable_SMTPUTF8
self.ssl_context = ssl_context
self.loop = asyncio.new_event_loop() if loop is None else loop
self.server = None
self._thread = None
self._thread_exception = None
self.ready_timeout = os.getenv(
'AIOSMTPD_CONTROLLER_TIMEOUT', ready_timeout)
self.server_kwargs: Dict[str, Any] = server_kwargs or {}
def factory(self):
"""Allow subclasses to customize the handler/server creation."""
return SMTP(self.handler, enable_SMTPUTF8=self.enable_SMTPUTF8,
**self.server_kwargs)
def _run(self, ready_event):
asyncio.set_event_loop(self.loop)
try:
self.server = self.loop.run_until_complete(
self.loop.create_server(
self.factory, host=self.hostname, port=self.port,
ssl=self.ssl_context))
except Exception as error: # pragma: nowsl
# Somehow WSL1.0 (Windows Subsystem for Linux) allows multiple
# listeners on one port?!
# That is why we add "pragma: nowsl" there, so when testing on
# WSL we can specify "PLATFORM=wsl".
self._thread_exception = error
return
self.loop.call_soon(ready_event.set)
self.loop.run_forever()
self.server.close()
self.loop.run_until_complete(self.server.wait_closed())
self.loop.close()
self.server = None
def start(self):
assert self._thread is None, 'SMTP daemon already running'
ready_event = threading.Event()
self._thread = threading.Thread(target=self._run, args=(ready_event,))
self._thread.daemon = True
self._thread.start()
# Wait a while until the server is responding.
ready_event.wait(self.ready_timeout)
if self._thread_exception is not None: # pragma: nowsl
# See comment about WSL1.0 in the _run() method
raise self._thread_exception
def _stop(self):
self.loop.stop()
try:
_all_tasks = asyncio.Task.all_tasks
except AttributeError: # pragma: skipif_lt_py39
_all_tasks = asyncio.all_tasks
for task in _all_tasks(self.loop):
task.cancel()
def stop(self):
assert self._thread is not None, 'SMTP daemon not running'
self.loop.call_soon_threadsafe(self._stop)
self._thread.join()
self._thread = None
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