Viewing file:  web_server.py (2.53 KB) -rw-r--r--
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"""Low level HTTP server."""
import asyncio
from typing import Any, Awaitable, Callable, Dict, List, Optional # noqa
from .abc import AbstractStreamWriter
from .helpers import get_running_loop
from .http_parser import RawRequestMessage
from .streams import StreamReader
from .web_protocol import RequestHandler, _RequestFactory, _RequestHandler
from .web_request import BaseRequest
__all__ = ("Server",)
class Server:
def __init__(
self,
handler: _RequestHandler,
*,
request_factory: Optional[_RequestFactory] = None,
handler_cancellation: bool = False,
loop: Optional[asyncio.AbstractEventLoop] = None,
**kwargs: Any
) -> None:
self._loop = get_running_loop(loop)
self._connections: Dict[RequestHandler, asyncio.Transport] = {}
self._kwargs = kwargs
self.requests_count = 0
self.request_handler = handler
self.request_factory = request_factory or self._make_request
self.handler_cancellation = handler_cancellation
@property
def connections(self) -> List[RequestHandler]:
return list(self._connections.keys())
def connection_made(
self, handler: RequestHandler, transport: asyncio.Transport
) -> None:
self._connections[handler] = transport
def connection_lost(
self, handler: RequestHandler, exc: Optional[BaseException] = None
) -> None:
if handler in self._connections:
del self._connections[handler]
def _make_request(
self,
message: RawRequestMessage,
payload: StreamReader,
protocol: RequestHandler,
writer: AbstractStreamWriter,
task: "asyncio.Task[None]",
) -> BaseRequest:
return BaseRequest(message, payload, protocol, writer, task, self._loop)
def pre_shutdown(self) -> None:
for conn in self._connections:
conn.close()
async def shutdown(self, timeout: Optional[float] = None) -> None:
coros = (conn.shutdown(timeout) for conn in self._connections)
await asyncio.gather(*coros)
self._connections.clear()
def __call__(self) -> RequestHandler:
try:
return RequestHandler(self, loop=self._loop, **self._kwargs)
except TypeError:
# Failsafe creation: remove all custom handler_args
kwargs = {
k: v
for k, v in self._kwargs.items()
if k in ["debug", "access_log_class"]
}
return RequestHandler(self, loop=self._loop, **kwargs)
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