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import asyncio
from collections.abc import AsyncIterator
import functools
import logging
from typing import Any, Callable, Optional, AsyncIterator as AsyncIteratorType
from oauthlib import oauth2
import requests
from requests.models import CONTENT_CHUNK_SIZE
from ..exceptions import (
TokenExpiredError,
ClientRequestError,
raise_with_traceback
)
from ..universal_http.async_requests import AsyncBasicRequestsHTTPSender
from . import AsyncHTTPSender, AsyncHTTPPolicy, Response, Request
from .requests import RequestsContext
_LOGGER = logging.getLogger(__name__)
class AsyncPipelineRequestsHTTPSender(AsyncHTTPSender):
"""Implements a basic Pipeline, that supports universal HTTP lib "requests" driver.
"""
def __init__(self, universal_http_requests_driver: Optional[AsyncBasicRequestsHTTPSender]=None) -> None:
self.driver = universal_http_requests_driver or AsyncBasicRequestsHTTPSender()
async def __aenter__(self) -> 'AsyncPipelineRequestsHTTPSender':
await self.driver.__aenter__()
return self
async def __aexit__(self, *exc_details): # pylint: disable=arguments-differ
await self.driver.__aexit__(*exc_details)
async def close(self):
await self.__aexit__()
def build_context(self):
# type: () -> RequestsContext
return RequestsContext(
session=self.driver.session,
)
async def send(self, request: Request, **kwargs) -> Response:
"""Send request object according to configuration.
:param Request request: The request object to be sent.
"""
if request.context is None: # Should not happen, but make mypy happy and does not hurt
request.context = self.build_context()
if request.context.session is not self.driver.session:
kwargs['session'] = request.context.session
return Response(
request,
await self.driver.send(request.http_request, **kwargs)
)
class AsyncRequestsCredentialsPolicy(AsyncHTTPPolicy):
"""Implementation of request-oauthlib except and retry logic.
"""
def __init__(self, credentials):
super(AsyncRequestsCredentialsPolicy, self).__init__()
self._creds = credentials
async def send(self, request, **kwargs):
session = request.context.session
try:
self._creds.signed_session(session)
except TypeError: # Credentials does not support session injection
_LOGGER.warning("Your credentials class does not support session injection. Performance will not be at the maximum.")
request.context.session = session = self._creds.signed_session()
try:
try:
return await self.next.send(request, **kwargs)
except (oauth2.rfc6749.errors.InvalidGrantError,
oauth2.rfc6749.errors.TokenExpiredError) as err:
error = "Token expired or is invalid. Attempting to refresh."
_LOGGER.warning(error)
try:
try:
self._creds.refresh_session(session)
except TypeError: # Credentials does not support session injection
_LOGGER.warning("Your credentials class does not support session injection. Performance will not be at the maximum.")
request.context.session = session = self._creds.refresh_session()
return await self.next.send(request, **kwargs)
except (oauth2.rfc6749.errors.InvalidGrantError,
oauth2.rfc6749.errors.TokenExpiredError) as err:
msg = "Token expired or is invalid."
raise_with_traceback(TokenExpiredError, msg, err)
except (requests.RequestException,
oauth2.rfc6749.errors.OAuth2Error) as err:
msg = "Error occurred in request."
raise_with_traceback(ClientRequestError, msg, err)