aiogram/aiogram/api/client/session/aiohttp.py
mpa 2d03285e88 refactor(generic):
get rid of generic behaviour for base session
2020-05-02 16:55:50 +04:00

147 lines
4.8 KiB
Python

from __future__ import annotations
from typing import (
Any,
AsyncGenerator,
Callable,
Dict,
Iterable,
List,
Optional,
Tuple,
Type,
TypeVar,
Union,
cast,
)
from aiohttp import BasicAuth, ClientSession, ClientTimeout, FormData, TCPConnector
from aiogram.api.methods import Request, TelegramMethod
from .base import PRODUCTION, BaseSession, TelegramAPIServer
T = TypeVar("T")
_ProxyBasic = Union[str, Tuple[str, BasicAuth]]
_ProxyChain = Iterable[_ProxyBasic]
_ProxyType = Union[_ProxyChain, _ProxyBasic]
def _retrieve_basic(basic: _ProxyBasic) -> Dict[str, Any]:
from aiohttp_socks.utils import parse_proxy_url # type: ignore
proxy_auth: Optional[BasicAuth] = None
if isinstance(basic, str):
proxy_url = basic
else:
proxy_url, proxy_auth = basic
proxy_type, host, port, username, password = parse_proxy_url(proxy_url)
if isinstance(proxy_auth, BasicAuth):
username = proxy_auth.login
password = proxy_auth.password
return dict(
proxy_type=proxy_type,
host=host,
port=port,
username=username,
password=password,
rdns=True,
)
def _prepare_connector(chain_or_plain: _ProxyType) -> Tuple[Type["TCPConnector"], Dict[str, Any]]:
from aiohttp_socks import ProxyInfo, ProxyConnector, ChainProxyConnector # type: ignore
# since tuple is Iterable(compatible with _ProxyChain) object, we assume that
# user wants chained proxies if tuple is a pair of string(url) and BasicAuth
if isinstance(chain_or_plain, str) or (
isinstance(chain_or_plain, tuple) and len(chain_or_plain) == 2
):
chain_or_plain = cast(_ProxyBasic, chain_or_plain)
return ProxyConnector, _retrieve_basic(chain_or_plain)
chain_or_plain = cast(_ProxyChain, chain_or_plain)
infos: List[ProxyInfo] = []
for basic in chain_or_plain:
infos.append(ProxyInfo(**_retrieve_basic(basic)))
return ChainProxyConnector, dict(proxy_infos=infos)
class AiohttpSession(BaseSession):
def __init__(
self,
api: TelegramAPIServer = PRODUCTION,
json_loads: Optional[Callable[..., Any]] = None,
json_dumps: Optional[Callable[..., str]] = None,
proxy: Optional[_ProxyType] = None,
):
super(AiohttpSession, self).__init__(
api=api, json_loads=json_loads, json_dumps=json_dumps, proxy=proxy
)
self._session: Optional[ClientSession] = None
self._connector_type: Type[TCPConnector] = TCPConnector
self._connector_init: Dict[str, Any] = {}
if self.proxy:
try:
self._connector_type, self._connector_init = _prepare_connector(
cast(_ProxyType, self.proxy)
)
except ImportError as exc: # pragma: no cover
raise UserWarning(
"In order to use aiohttp client for proxy requests, install "
"https://pypi.org/project/aiohttp-socks/"
) from exc
async def create_session(self) -> ClientSession:
if self._session is None or self._session.closed:
self._session = ClientSession(connector=self._connector_type(**self._connector_init))
return self._session
async def close(self) -> None:
if self._session is not None and not self._session.closed:
await self._session.close()
def build_form_data(self, request: Request) -> FormData:
form = FormData(quote_fields=False)
for key, value in request.data.items():
if value is None:
continue
form.add_field(key, self.prepare_value(value))
if request.files:
for key, value in request.files.items():
form.add_field(key, value, filename=value.filename or key)
return form
async def make_request(self, token: str, call: TelegramMethod[T]) -> T:
session = await self.create_session()
request = call.build_request()
url = self.api.api_url(token=token, method=request.method)
form = self.build_form_data(request)
async with session.post(url, data=form) as resp:
raw_result = await resp.json(loads=self.json_loads)
response = call.build_response(raw_result)
self.raise_for_status(response)
return cast(T, response.result)
async def stream_content(
self, url: str, timeout: int, chunk_size: int
) -> AsyncGenerator[bytes, None]:
session = await self.create_session()
client_timeout = ClientTimeout(total=timeout)
async with session.get(url, timeout=client_timeout) as resp:
async for chunk in resp.content.iter_chunked(chunk_size):
yield chunk
async def __aenter__(self) -> AiohttpSession:
await self.create_session()
return self