122 lines
3.3 KiB
Python
122 lines
3.3 KiB
Python
# Copyright 2019 miruka
|
|
# This file is part of harmonyqml, licensed under GPLv3.
|
|
|
|
import logging
|
|
import socket
|
|
import ssl
|
|
import time
|
|
from threading import Lock
|
|
from typing import Callable, Optional, Tuple
|
|
from uuid import UUID
|
|
|
|
import nio
|
|
import nio.responses as nr
|
|
|
|
OptSock = Optional[ssl.SSLSocket]
|
|
NioRequestFunc = Callable[..., Tuple[UUID, bytes]]
|
|
|
|
|
|
class NioErrorResponse(Exception):
|
|
def __init__(self, response: nr.ErrorResponse) -> None:
|
|
self.response = response
|
|
super().__init__(str(response))
|
|
|
|
|
|
class NetworkManager:
|
|
http_retry_codes = {408, 429, 500, 502, 503, 504, 507}
|
|
|
|
|
|
def __init__(self, host: str, port: int, nio_client: nio.client.HttpClient
|
|
) -> None:
|
|
self.host = host
|
|
self.port = port
|
|
self.nio = nio_client
|
|
|
|
self._ssl_context: ssl.SSLContext = ssl.create_default_context()
|
|
self._ssl_session: Optional[ssl.SSLSession] = None
|
|
self._lock: Lock = Lock()
|
|
|
|
|
|
def _get_socket(self) -> ssl.SSLSocket:
|
|
sock = self._ssl_context.wrap_socket( # type: ignore
|
|
socket.create_connection((self.host, self.port)),
|
|
server_hostname = self.host,
|
|
session = self._ssl_session,
|
|
)
|
|
self._ssl_session = self._ssl_session or sock.session
|
|
return sock
|
|
|
|
|
|
@staticmethod
|
|
def _close_socket(sock: socket.socket) -> None:
|
|
try:
|
|
sock.shutdown(how=socket.SHUT_RDWR)
|
|
except OSError: # Already closer by server
|
|
pass
|
|
sock.close()
|
|
|
|
|
|
def read(self, with_sock: OptSock = None) -> nr.Response:
|
|
sock = with_sock or self._get_socket()
|
|
|
|
response = None
|
|
while not response:
|
|
left_to_send = self.nio.data_to_send()
|
|
if left_to_send:
|
|
self.write(left_to_send, sock)
|
|
|
|
self.nio.receive(sock.recv(4096))
|
|
response = self.nio.next_response()
|
|
|
|
if isinstance(response, nr.ErrorResponse):
|
|
raise NioErrorResponse(response)
|
|
|
|
if not with_sock:
|
|
self._close_socket(sock)
|
|
|
|
return response
|
|
|
|
|
|
def write(self, data: bytes, with_sock: OptSock = None) -> None:
|
|
if not data:
|
|
return
|
|
|
|
sock = with_sock or self._get_socket()
|
|
sock.sendall(data)
|
|
|
|
if not with_sock:
|
|
self._close_socket(sock)
|
|
|
|
|
|
def talk(self, nio_func: NioRequestFunc, *args, **kwargs) -> nr.Response:
|
|
with self._lock:
|
|
while True:
|
|
to_send = nio_func(*args, **kwargs)[1]
|
|
sock = self._get_socket()
|
|
|
|
try:
|
|
self.write(to_send, sock)
|
|
response = self.read(sock)
|
|
|
|
except NioErrorResponse as err:
|
|
logging.error("bad read for %s: %s", nio_func, err)
|
|
self._close_socket(sock)
|
|
|
|
if self._should_abort_talk(err):
|
|
logging.error("aborting talk")
|
|
break
|
|
|
|
time.sleep(10)
|
|
|
|
else:
|
|
break
|
|
|
|
self._close_socket(sock)
|
|
return response
|
|
|
|
|
|
def _should_abort_talk(self, err: NioErrorResponse) -> bool:
|
|
if err.response.status_code in self.http_retry_codes:
|
|
return False
|
|
return True
|