Commit f3b279fb authored by Luc Yriarte's avatar Luc Yriarte
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os-core-lib-python-gcp snapshot @331210f

current_version = 0.2.3
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# osdu-core-lib-python-gcp
This is the python package for osdu google cloud implementations.
## testing
You need valid gcp credentials and a project ID to run the unit tests.
__version__ = '0.2.3'
# The patch number (the last one) should only be updated by the build/deploy script, if changed manually
# To increase the minor or major version:
# $> pip install -U bumpversion
# $> bumpversion major | minor
# then $> git push --tag
# may fail on windows try without commit: bumpversion part --no-commit
import aiohttp
import json
from typing import List, Optional
import datetime
import time
import jwt
from urllib.parse import quote_plus
from urllib.parse import urlencode
from osdu.core.auth import AuthBase
class GoogleAccountAuth(AuthBase):
_scheme: str = 'Bearer'
Based on gcloud aio project
def __init__(self,
service_file: str,
session: aiohttp.ClientSession,
scopes: List[str] = None):
:param service_file: service account file
:param session: aio http session
:param scopes: scopes
with open(service_file, 'r') as f:
self.service_data = json.load(f)
self.session = session
self.scopes = ' '.join(scopes or [])
self.access_token: Optional[str] = None
self.access_token_duration = 0
self.access_token_acquired_at = datetime.datetime(1970, 1, 1)
def scheme(self) -> Optional[str]:
""" Return scheme """
return self._scheme
async def header_value(self) -> str:
token = await self._get_token()
return f'{self._scheme} {token}'
async def token(self) -> str:
return await self._get_token()
async def __call__(self):
""" return tuple scheme, credentials/token """
token = await self._get_token()
return self._scheme, token
def email(self) -> Optional[str]:
""" Return email used in token, if available """
return self.service_data['client_email']
async def _refresh_token_for_service_account(self):
token_uri = self.service_data.get('token_uri', '')
now = int(time.time())
assertion_payload = {
'aud': token_uri,
'exp': now + 3600,
'iat': now,
'iss': self.service_data['client_email'],
'scope': self.scopes,
# N.B. algorithm='RS256' requires an extra 240MB in dependencies...
assertion = jwt.encode(assertion_payload,
payload = urlencode({
'assertion': assertion,
'grant_type': 'urn:ietf:params:oauth:grant-type:jwt-bearer',
}, quote_via=quote_plus)
refresh_headers = {'Content-Type': 'application/x-www-form-urlencoded'}
async with, data=payload, headers=refresh_headers) as resp:
if resp.status != 200:
raise Exception() #TODO
content = await resp.json()
# print('from token ------------')
# print(content)
self.access_token = str(content['access_token'])
self.access_token_duration = int(content['expires_in'])
self.access_token_acquired_at = datetime.datetime.utcnow()
async def _get_token(self) -> str:
if self.access_token:
now = datetime.datetime.utcnow()
delta = (now - self.access_token_acquired_at).total_seconds()
if delta < 3000:
return self.access_token
await self._refresh_token_for_service_account()
return self.access_token
# Based on
import enum
import io
import mimetypes
import os
from typing import Any, Optional, Tuple, List
from urllib.parse import quote
from asyncio import sleep
from .http_client_gcp import *
from aiohttp import ClientResponseError
from import BlobStorageBase
from import Blob
from .auth_gcp_sa import GoogleAccountAuth
import ujson as json
except ImportError:
import json # type: ignore
# log = logging.getLogger(__name__)
class UploadType(enum.Enum):
class GCloudAioStorage(BlobStorageBase):
_scopes = ['']
_access_token_dict = {}
def __init__(self, session=None, service_account_file: Optional[str] = None):
self._client = GCloudAioHttpClient(scopes=self._scopes, session=session)
self._session = session
self._service_account_file = service_account_file
async def _get_access_token(self,
project: str, bucket: str,
forwarded_auth: Optional = None) -> str:
if forwarded_auth is not None:
return await forwarded_auth.token()
assert self._service_account_file, 'No credentials provided'
token_cache = self._access_token_dict
cache_key = f'{project}_{bucket}'
tenant_access_token = token_cache.get(cache_key, None)
if tenant_access_token is None:
tenant_access_token = GoogleAccountAuth(service_file=self._service_account_file,
token_cache[cache_key] = tenant_access_token
return await tenant_access_token.token()
async def delete(self, project: str, bucket: str, object_name: str,
*, auth: Optional = None, timeout: int = 10, params: dict = None, **kwargs):
encoded_object_name = quote(object_name, safe='')
url = f'{API_ROOT}/{bucket}/o/{encoded_object_name}'
token = await self._get_access_token(project, bucket, auth)
await self._client.delete(url,
params=params or {},
async def download(self, project: str, bucket: str, object_name: str,
*, auth: Optional = None, timeout: int = 10, **kwargs) -> bytes:
return await self._download(project, bucket, object_name, auth=auth, timeout=timeout, params={'alt': 'media'})
async def download_metadata(self, project: str, bucket: str, object_name: str,
*, auth: Optional = None, timeout: int = 10, ** kwargs) -> Blob:
data = await self._download(project, bucket, object_name, auth=auth, timeout=timeout)
metadata: dict = json.loads(data.decode())
return Blob(identifier=metadata.get('id', None),
bucket=metadata.get('bucket', bucket),
name=metadata.get('name', object_name),
acl=metadata.get('acl', None),
content_type=metadata.get('contentType', None),
time_created=metadata.get('timeCreated', None),
time_updated=metadata.get('updated', None),
size=metadata.get('size', -1)
async def list_objects(self, project: str, bucket: str, *,
auth: Optional = None, prefix: str = '', page_token: Optional[str] = None,
max_result: Optional[int] = None, timeout: int = 10, **kwargs) -> List[str]:
url = f'{API_ROOT}/{bucket}/o'
params = {'prefix': prefix}
if page_token is not None:
params['pageToken'] = page_token
if max_result is not None:
params['maxResults'] = max_result
data, _ = await self._client.get(url, response_type=ResponseType.JSON, params=params or {}, timeout=timeout,
auth_token=await self._get_access_token(project, bucket, auth))
return [x['name'] for x in data.get('items', list())]
def build_URI(cls, bucket: str, object_name: str) -> str:
return f'gs://{bucket}/{object_name}'
# TODO: if `metadata` is set, use multipart upload:
async def upload(self, project: str, bucket: str, object_name: str, file_data: Any, *,
auth: Optional = None, content_type: str = None, metadata: dict = None,
timeout: int = 30, **kwargs) -> dict:
url = f'{API_ROOT_UPLOAD}/{bucket}/o'
stream = self._preprocess_data(file_data)
content_length = self._get_stream_len(stream)
# mime detection method same as in aiohttp 3.4.4
content_type = content_type or mimetypes.guess_type(object_name)[0]
parameters = {}
headers = {}
'Content-Length': str(content_length),
'Content-Type': content_type or '',
force_resumable_upload: bool = None
upload_type = self._decide_upload_type(force_resumable_upload, content_length)
# log.debug('using %r gcloud storage upload method', upload_type)
if upload_type == UploadType.SIMPLE:
# if metadata:
# log.warning('metadata will be ignored for upload_type=Simple')
return await self._upload_simple(project, bucket, url, object_name, stream, parameters, headers,
auth=auth, timeout=timeout)
if upload_type == UploadType.RESUMABLE:
return await self._upload_resumable(project, bucket, url, object_name, stream, parameters, headers,
auth=auth, metadata=metadata, timeout=timeout)
raise TypeError(f'upload type {upload_type} not supported')
def _get_stream_len(stream: io.IOBase) -> int:
current = stream.tell()
return, os.SEEK_END)
def _preprocess_data(data: Any) -> io.IOBase:
if data is None:
return io.StringIO('')
if isinstance(data, bytes):
return io.BytesIO(data)
if isinstance(data, str):
return io.StringIO(data)
if isinstance(data, io.IOBase):
return data
raise TypeError(f'unsupported upload type: "{type(data)}"')
def _decide_upload_type(force_resumable_upload: Optional[bool],
content_length: int) -> UploadType:
# force resumable
if force_resumable_upload is True:
return UploadType.RESUMABLE
# force simple
if force_resumable_upload is False:
return UploadType.SIMPLE
# decide based on Content-Length
return UploadType.RESUMABLE
return UploadType.SIMPLE
def _split_content_type(content_type: str) -> Tuple[str, str]:
content_type_and_encoding_split = content_type.split(';')
content_type = content_type_and_encoding_split[0].lower().strip()
encoding = None
if len(content_type_and_encoding_split) > 1:
encoding_str = content_type_and_encoding_split[1].lower().strip()
encoding = encoding_str.split('=')[-1]