tuxbot-bot/venv/lib/python3.7/site-packages/aiohttp/web_runner.py
2019-12-16 18:12:10 +01:00

308 lines
9.9 KiB
Python

import asyncio
import signal
import socket
from abc import ABC, abstractmethod
from typing import Any, List, Optional, Set
from yarl import URL
from .web_app import Application
from .web_server import Server
try:
from ssl import SSLContext
except ImportError:
SSLContext = object # type: ignore
__all__ = ('BaseSite', 'TCPSite', 'UnixSite', 'SockSite', 'BaseRunner',
'AppRunner', 'ServerRunner', 'GracefulExit')
class GracefulExit(SystemExit):
code = 1
def _raise_graceful_exit() -> None:
raise GracefulExit()
class BaseSite(ABC):
__slots__ = ('_runner', '_shutdown_timeout', '_ssl_context', '_backlog',
'_server')
def __init__(self, runner: 'BaseRunner', *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128) -> None:
if runner.server is None:
raise RuntimeError("Call runner.setup() before making a site")
self._runner = runner
self._shutdown_timeout = shutdown_timeout
self._ssl_context = ssl_context
self._backlog = backlog
self._server = None # type: Optional[asyncio.AbstractServer]
@property
@abstractmethod
def name(self) -> str:
pass # pragma: no cover
@abstractmethod
async def start(self) -> None:
self._runner._reg_site(self)
async def stop(self) -> None:
self._runner._check_site(self)
if self._server is None:
self._runner._unreg_site(self)
return # not started yet
self._server.close()
await self._server.wait_closed()
await self._runner.shutdown()
assert self._runner.server
await self._runner.server.shutdown(self._shutdown_timeout)
self._runner._unreg_site(self)
class TCPSite(BaseSite):
__slots__ = ('_host', '_port', '_reuse_address', '_reuse_port')
def __init__(self, runner: 'BaseRunner',
host: str=None, port: int=None, *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128, reuse_address: Optional[bool]=None,
reuse_port: Optional[bool]=None) -> None:
super().__init__(runner, shutdown_timeout=shutdown_timeout,
ssl_context=ssl_context, backlog=backlog)
if host is None:
host = "0.0.0.0"
self._host = host
if port is None:
port = 8443 if self._ssl_context else 8080
self._port = port
self._reuse_address = reuse_address
self._reuse_port = reuse_port
@property
def name(self) -> str:
scheme = 'https' if self._ssl_context else 'http'
return str(URL.build(scheme=scheme, host=self._host, port=self._port))
async def start(self) -> None:
await super().start()
loop = asyncio.get_event_loop()
server = self._runner.server
assert server is not None
self._server = await loop.create_server(
server, self._host, self._port,
ssl=self._ssl_context, backlog=self._backlog,
reuse_address=self._reuse_address,
reuse_port=self._reuse_port)
class UnixSite(BaseSite):
__slots__ = ('_path', )
def __init__(self, runner: 'BaseRunner', path: str, *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128) -> None:
super().__init__(runner, shutdown_timeout=shutdown_timeout,
ssl_context=ssl_context, backlog=backlog)
self._path = path
@property
def name(self) -> str:
scheme = 'https' if self._ssl_context else 'http'
return '{}://unix:{}:'.format(scheme, self._path)
async def start(self) -> None:
await super().start()
loop = asyncio.get_event_loop()
server = self._runner.server
assert server is not None
self._server = await loop.create_unix_server(
server, self._path,
ssl=self._ssl_context, backlog=self._backlog)
class SockSite(BaseSite):
__slots__ = ('_sock', '_name')
def __init__(self, runner: 'BaseRunner', sock: socket.socket, *,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
backlog: int=128) -> None:
super().__init__(runner, shutdown_timeout=shutdown_timeout,
ssl_context=ssl_context, backlog=backlog)
self._sock = sock
scheme = 'https' if self._ssl_context else 'http'
if hasattr(socket, 'AF_UNIX') and sock.family == socket.AF_UNIX:
name = '{}://unix:{}:'.format(scheme, sock.getsockname())
else:
host, port = sock.getsockname()[:2]
name = str(URL.build(scheme=scheme, host=host, port=port))
self._name = name
@property
def name(self) -> str:
return self._name
async def start(self) -> None:
await super().start()
loop = asyncio.get_event_loop()
server = self._runner.server
assert server is not None
self._server = await loop.create_server(
server, sock=self._sock,
ssl=self._ssl_context, backlog=self._backlog)
class BaseRunner(ABC):
__slots__ = ('_handle_signals', '_kwargs', '_server', '_sites')
def __init__(self, *, handle_signals: bool=False, **kwargs: Any) -> None:
self._handle_signals = handle_signals
self._kwargs = kwargs
self._server = None # type: Optional[Server]
self._sites = [] # type: List[BaseSite]
@property
def server(self) -> Optional[Server]:
return self._server
@property
def addresses(self) -> List[str]:
ret = [] # type: List[str]
for site in self._sites:
server = site._server
if server is not None:
sockets = server.sockets
if sockets is not None:
for sock in sockets:
ret.append(sock.getsockname())
return ret
@property
def sites(self) -> Set[BaseSite]:
return set(self._sites)
async def setup(self) -> None:
loop = asyncio.get_event_loop()
if self._handle_signals:
try:
loop.add_signal_handler(signal.SIGINT, _raise_graceful_exit)
loop.add_signal_handler(signal.SIGTERM, _raise_graceful_exit)
except NotImplementedError: # pragma: no cover
# add_signal_handler is not implemented on Windows
pass
self._server = await self._make_server()
@abstractmethod
async def shutdown(self) -> None:
pass # pragma: no cover
async def cleanup(self) -> None:
loop = asyncio.get_event_loop()
if self._server is None:
# no started yet, do nothing
return
# The loop over sites is intentional, an exception on gather()
# leaves self._sites in unpredictable state.
# The loop guaranties that a site is either deleted on success or
# still present on failure
for site in list(self._sites):
await site.stop()
await self._cleanup_server()
self._server = None
if self._handle_signals:
try:
loop.remove_signal_handler(signal.SIGINT)
loop.remove_signal_handler(signal.SIGTERM)
except NotImplementedError: # pragma: no cover
# remove_signal_handler is not implemented on Windows
pass
@abstractmethod
async def _make_server(self) -> Server:
pass # pragma: no cover
@abstractmethod
async def _cleanup_server(self) -> None:
pass # pragma: no cover
def _reg_site(self, site: BaseSite) -> None:
if site in self._sites:
raise RuntimeError("Site {} is already registered in runner {}"
.format(site, self))
self._sites.append(site)
def _check_site(self, site: BaseSite) -> None:
if site not in self._sites:
raise RuntimeError("Site {} is not registered in runner {}"
.format(site, self))
def _unreg_site(self, site: BaseSite) -> None:
if site not in self._sites:
raise RuntimeError("Site {} is not registered in runner {}"
.format(site, self))
self._sites.remove(site)
class ServerRunner(BaseRunner):
"""Low-level web server runner"""
__slots__ = ('_web_server',)
def __init__(self, web_server: Server, *,
handle_signals: bool=False, **kwargs: Any) -> None:
super().__init__(handle_signals=handle_signals, **kwargs)
self._web_server = web_server
async def shutdown(self) -> None:
pass
async def _make_server(self) -> Server:
return self._web_server
async def _cleanup_server(self) -> None:
pass
class AppRunner(BaseRunner):
"""Web Application runner"""
__slots__ = ('_app',)
def __init__(self, app: Application, *,
handle_signals: bool=False, **kwargs: Any) -> None:
super().__init__(handle_signals=handle_signals, **kwargs)
if not isinstance(app, Application):
raise TypeError("The first argument should be web.Application "
"instance, got {!r}".format(app))
self._app = app
@property
def app(self) -> Application:
return self._app
async def shutdown(self) -> None:
await self._app.shutdown()
async def _make_server(self) -> Server:
loop = asyncio.get_event_loop()
self._app._set_loop(loop)
self._app.on_startup.freeze()
await self._app.startup()
self._app.freeze()
return self._app._make_handler(loop=loop, **self._kwargs)
async def _cleanup_server(self) -> None:
await self._app.cleanup()