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# Copyright 2024 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Transport adapter for Asynchronous HTTP Requests based on aiohttp.
"""
import asyncio
from typing import AsyncGenerator, Mapping, Optional
try:
import aiohttp # type: ignore
except ImportError as caught_exc: # pragma: NO COVER
raise ImportError(
"The aiohttp library is not installed from please install the aiohttp package to use the aiohttp transport."
) from caught_exc
from google.auth import _helpers
from google.auth import exceptions
from google.auth.aio import transport
class Response(transport.Response):
"""
Represents an HTTP response and its data. It is returned by ``google.auth.aio.transport.sessions.AsyncAuthorizedSession``.
Args:
response (aiohttp.ClientResponse): An instance of aiohttp.ClientResponse.
Attributes:
status_code (int): The HTTP status code of the response.
headers (Mapping[str, str]): The HTTP headers of the response.
"""
def __init__(self, response: aiohttp.ClientResponse):
self._response = response
@property
@_helpers.copy_docstring(transport.Response)
def status_code(self) -> int:
return self._response.status
@property
@_helpers.copy_docstring(transport.Response)
def headers(self) -> Mapping[str, str]:
return {key: value for key, value in self._response.headers.items()}
@_helpers.copy_docstring(transport.Response)
async def content(self, chunk_size: int = 1024) -> AsyncGenerator[bytes, None]:
try:
async for chunk in self._response.content.iter_chunked(
chunk_size
): # pragma: no branch
yield chunk
except aiohttp.ClientPayloadError as exc:
raise exceptions.ResponseError(
"Failed to read from the payload stream."
) from exc
@_helpers.copy_docstring(transport.Response)
async def read(self) -> bytes:
try:
return await self._response.read()
except aiohttp.ClientResponseError as exc:
raise exceptions.ResponseError("Failed to read the response body.") from exc
@_helpers.copy_docstring(transport.Response)
async def close(self):
self._response.close()
class Request(transport.Request):
"""Asynchronous Requests request adapter.
This class is used internally for making requests using aiohttp
in a consistent way. If you use :class:`google.auth.aio.transport.sessions.AsyncAuthorizedSession`
you do not need to construct or use this class directly.
This class can be useful if you want to configure a Request callable
with a custom ``aiohttp.ClientSession`` in :class:`AuthorizedSession` or if
you want to manually refresh a :class:`~google.auth.aio.credentials.Credentials` instance::
import aiohttp
import google.auth.aio.transport.aiohttp
# Default example:
request = google.auth.aio.transport.aiohttp.Request()
await credentials.refresh(request)
# Custom aiohttp Session Example:
session = session=aiohttp.ClientSession(auto_decompress=False)
request = google.auth.aio.transport.aiohttp.Request(session=session)
auth_sesion = google.auth.aio.transport.sessions.AsyncAuthorizedSession(auth_request=request)
Args:
session (aiohttp.ClientSession): An instance :class:`aiohttp.ClientSession` used
to make HTTP requests. If not specified, a session will be created.
.. automethod:: __call__
"""
def __init__(self, session: aiohttp.ClientSession = None):
self._session = session
self._closed = False
async def __call__(
self,
url: str,
method: str = "GET",
body: Optional[bytes] = None,
headers: Optional[Mapping[str, str]] = None,
timeout: float = transport._DEFAULT_TIMEOUT_SECONDS,
**kwargs,
) -> transport.Response:
"""
Make an HTTP request using aiohttp.
Args:
url (str): The URL to be requested.
method (Optional[str]):
The HTTP method to use for the request. Defaults to 'GET'.
body (Optional[bytes]):
The payload or body in HTTP request.
headers (Optional[Mapping[str, str]]):
Request headers.
timeout (float): The number of seconds to wait for a
response from the server. If not specified or if None, the
requests default timeout will be used.
kwargs: Additional arguments passed through to the underlying
aiohttp :meth:`aiohttp.Session.request` method.
Returns:
google.auth.aio.transport.Response: The HTTP response.
Raises:
- google.auth.exceptions.TransportError: If the request fails or if the session is closed.
- google.auth.exceptions.TimeoutError: If the request times out.
"""
try:
if self._closed:
raise exceptions.TransportError("session is closed.")
if not self._session:
self._session = aiohttp.ClientSession()
client_timeout = aiohttp.ClientTimeout(total=timeout)
response = await self._session.request(
method,
url,
data=body,
headers=headers,
timeout=client_timeout,
**kwargs,
)
return Response(response)
except aiohttp.ClientError as caught_exc:
client_exc = exceptions.TransportError(f"Failed to send request to {url}.")
raise client_exc from caught_exc
except asyncio.TimeoutError as caught_exc:
timeout_exc = exceptions.TimeoutError(
f"Request timed out after {timeout} seconds."
)
raise timeout_exc from caught_exc
async def close(self) -> None:
"""
Close the underlying aiohttp session to release the acquired resources.
"""
if not self._closed and self._session:
await self._session.close()
self._closed = True
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