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aiohttp_session.py
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aiohttp_session.py
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__all__ = ["AiohttpSession"]
import asyncio
from json import JSONDecodeError
from aiohttp import ClientSession
from aiohttp.client_exceptions import ContentTypeError
import aiofiles
from aiofiles import os as async_os
import async_timeout
from ..models import Response
from .abc import AbstractSession
from ..excs import ValidationError
from .common import _call_callback
async def _get_file_size(full_file_path):
stat = await async_os.stat(full_file_path)
return stat.st_size
async def _aiter_file(file_name, chunk_size):
""" Async file generator """
async with aiofiles.open(file_name, "rb") as f:
chunk = await f.read(chunk_size)
while chunk:
yield chunk
chunk = await f.read(chunk_size)
class AiohttpSession(ClientSession, AbstractSession):
async def send(
self,
*requests,
timeout=None,
full_res=False,
raise_for_status=True,
session_factory=None,
):
async def resolve_response(request, response):
data = None
json = None
download_file = None
upload_file = None
# If downloading file:
if request.media_download:
download_file = request.media_download.file_path
async with aiofiles.open(download_file, "wb+") as f:
async for line in response.content:
await f.write(line)
else:
if response.status != 204: # If no (no content)
try:
json = await response.json()
except (JSONDecodeError, ContentTypeError):
try:
data = await response.text()
except ContentTypeError:
try:
data = await response.read()
except ContentTypeError:
data = None
if request.media_upload:
upload_file = request.media_upload.file_path
return Response(
url=str(response.url),
headers=response.headers,
status_code=response.status,
json=json,
data=data,
reason=response.reason if getattr(response, "reason") else None,
req=request,
download_file=download_file,
upload_file=upload_file,
session_factory=session_factory,
)
async def fire_request(request):
request.headers["Accept-Encoding"] = "gzip"
request.headers["User-Agent"] = "Aiogoogle Aiohttp (gzip)"
if request.media_upload:
# Validate
if (
request.media_upload.validate is True
and request.media_upload.max_size is not None
):
size = await _get_file_size(request.media_upload.file_path)
max_size = request.media_upload.max_size
if size > max_size:
raise ValidationError(
f'"{request.media_upload.file_path}" has a size of {size/1000}KB. Max upload size for this endpoint is: {max_size/1000}KB.'
)
# If multipart pass a file async generator
if request.media_upload.multipart is True:
return await self.request(
method=request.method,
url=request.media_upload.upload_path,
headers=request.headers,
data=_aiter_file(
request.media_upload.file_path,
request.media_upload.chunk_size,
),
json=request.json,
timeout=request.timeout,
)
# Else load file to memory and send
else:
async with aiofiles.open(
request.media_upload.file_path, "rb"
) as file:
read_file = await file.read()
return await self.request(
method=request.method,
url=request.media_upload.upload_path,
headers=request.headers,
data=read_file,
json=request.json,
timeout=request.timeout,
)
# Else, if no file upload
else:
return await self.request(
method=request.method,
url=request.url,
headers=request.headers,
data=request.data,
json=request.json,
timeout=request.timeout,
)
# ----------------- send sequence ------------------#
async def get_response(request):
response = await fire_request(request)
response = await resolve_response(request, response)
if raise_for_status is True:
response.raise_for_status()
response = _call_callback(request, response)
return response
async def get_content(request):
response = await get_response(request)
return response.content
# ----------------- /send sequence ------------------#
async def schedule_tasks():
if full_res is True:
tasks = [
asyncio.ensure_future(get_response(request)) for request in requests
]
else:
tasks = [
asyncio.ensure_future(get_content(request)) for request in requests
]
return await asyncio.gather(*tasks, return_exceptions=False)
session_factory = self.__class__ if session_factory is None else session_factory
if timeout is not None:
async with async_timeout.timeout(timeout):
results = await schedule_tasks()
else:
results = await schedule_tasks()
return (
results[0] if isinstance(results, list) and len(results) == 1 else results
)