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fix(storage): anonymous credentials for private bucket #107

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Apr 25, 2020
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20 changes: 12 additions & 8 deletions google/cloud/storage/blob.py
Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,6 @@
from google.cloud._helpers import _rfc3339_to_datetime
from google.cloud._helpers import _to_bytes
from google.cloud.exceptions import NotFound
from google.cloud.storage._helpers import _get_storage_host
from google.cloud.storage._helpers import _PropertyMixin
from google.cloud.storage._helpers import _scalar_property
from google.cloud.storage._helpers import _convert_to_timestamp
Expand All @@ -70,12 +69,11 @@
from google.cloud.storage.constants import REGIONAL_LEGACY_STORAGE_CLASS
from google.cloud.storage.constants import STANDARD_STORAGE_CLASS

_STORAGE_HOST = _get_storage_host()

_API_ACCESS_ENDPOINT = "https://storage.googleapis.com"
_DEFAULT_CONTENT_TYPE = u"application/octet-stream"
_DOWNLOAD_URL_TEMPLATE = _STORAGE_HOST + u"/download/storage/v1{path}?alt=media"
_BASE_UPLOAD_TEMPLATE = _STORAGE_HOST + u"/upload/storage/v1{bucket_path}/o?uploadType="
_DOWNLOAD_URL_TEMPLATE = u"{hostname}/download/storage/v1{path}?alt=media"
_BASE_UPLOAD_TEMPLATE = u"{hostname}/upload/storage/v1{bucket_path}/o?uploadType="
_MULTIPART_URL_TEMPLATE = _BASE_UPLOAD_TEMPLATE + u"multipart"
_RESUMABLE_URL_TEMPLATE = _BASE_UPLOAD_TEMPLATE + u"resumable"
# NOTE: "acl" is also writeable but we defer ACL management to
Expand Down Expand Up @@ -662,7 +660,9 @@ def _get_download_url(self):
"""
name_value_pairs = []
if self.media_link is None:
base_url = _DOWNLOAD_URL_TEMPLATE.format(path=self.path)
base_url = _DOWNLOAD_URL_TEMPLATE.format(
hostname=self.client._connection.API_BASE_URL, path=self.path
)
if self.generation is not None:
name_value_pairs.append(("generation", "{:d}".format(self.generation)))
else:
Expand Down Expand Up @@ -790,11 +790,11 @@ def download_to_file(

:raises: :class:`google.cloud.exceptions.NotFound`
"""
download_url = self._get_download_url()
headers = _get_encryption_headers(self._encryption_key)
headers["accept-encoding"] = "gzip"

transport = self._get_transport(client)
download_url = self._get_download_url()
try:
self._do_download(
transport, file_obj, download_url, headers, start, end, raw_download
Expand Down Expand Up @@ -1055,7 +1055,9 @@ def _do_multipart_upload(
info = self._get_upload_arguments(content_type)
headers, object_metadata, content_type = info

base_url = _MULTIPART_URL_TEMPLATE.format(bucket_path=self.bucket.path)
base_url = _MULTIPART_URL_TEMPLATE.format(
hostname=self.client._connection.API_BASE_URL, bucket_path=self.bucket.path
)
name_value_pairs = []

if self.user_project is not None:
Expand Down Expand Up @@ -1190,7 +1192,9 @@ def _initiate_resumable_upload(
if extra_headers is not None:
headers.update(extra_headers)

base_url = _RESUMABLE_URL_TEMPLATE.format(bucket_path=self.bucket.path)
base_url = _RESUMABLE_URL_TEMPLATE.format(
hostname=self.client._connection.API_BASE_URL, bucket_path=self.bucket.path
)
name_value_pairs = []

if self.user_project is not None:
Expand Down
2 changes: 1 addition & 1 deletion google/cloud/storage/client.py
Original file line number Diff line number Diff line change
Expand Up @@ -530,7 +530,7 @@ def download_blob_to_file(self, blob_or_uri, file_obj, start=None, end=None):
try:
blob_or_uri.download_to_file(file_obj, client=self, start=start, end=end)
except AttributeError:
blob = Blob.from_string(blob_or_uri)
blob = Blob.from_string(blob_or_uri, client=self)
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was this an accidental miss in implementation? Seems like it but want to confirm.

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Looking at it again, client is passed below to download_to_file(). The change doesn't look necessary.

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Yes, but the problem arise here , if i didn't pass the client so bucket class has received None

bucket = Bucket(client, name=netloc)

so when call _require_client() method it find the client object which passed in download_to_file() so hostname=self.client._connection.API_BASE_URL line hit the error as self.client found None

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@frankyn frankyn Apr 24, 2020

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Gotcha, when I raised that you should revert my last comment, I was referring to updating the method _get_download_url() to accept client parameter because even though _get_transport calls _require_client() it doesn't update self.client with a value if it's None.

I think you may want to pass client returned from _require_client() to _get_download_url().

Thank you for your patience.

blob.download_to_file(file_obj, client=self, start=start, end=end)

def list_blobs(
Expand Down
15 changes: 10 additions & 5 deletions tests/unit/test_blob.py
Original file line number Diff line number Diff line change
Expand Up @@ -1003,7 +1003,8 @@ def test_download_to_file_with_failure(self):

def test_download_to_file_wo_media_link(self):
blob_name = "blob-name"
client = mock.Mock(spec=[u"_http"])
client = mock.Mock(_connection=_Connection, spec=[u"_http"])
client._connection.API_BASE_URL = "https://storage.googleapis.com"
bucket = _Bucket(client)
blob = self._make_one(blob_name, bucket=bucket)
blob._do_download = mock.Mock()
Expand Down Expand Up @@ -1319,7 +1320,8 @@ def _do_multipart_success(
transport = self._mock_transport(http_client.OK, {})

# Create some mock arguments.
client = mock.Mock(_http=transport, spec=["_http"])
client = mock.Mock(_http=transport, _connection=_Connection, spec=["_http"])
client._connection.API_BASE_URL = "https://storage.googleapis.com"
data = b"data here hear hier"
stream = io.BytesIO(data)
content_type = u"application/xml"
Expand Down Expand Up @@ -1485,7 +1487,8 @@ def _initiate_resumable_helper(
transport = self._mock_transport(http_client.OK, response_headers)

# Create some mock arguments and call the method under test.
client = mock.Mock(_http=transport, spec=[u"_http"])
client = mock.Mock(_http=transport, _connection=_Connection, spec=[u"_http"])
client._connection.API_BASE_URL = "https://storage.googleapis.com"
data = b"hello hallo halo hi-low"
stream = io.BytesIO(data)
content_type = u"text/plain"
Expand Down Expand Up @@ -1772,7 +1775,8 @@ def _do_resumable_helper(
)

# Create some mock arguments and call the method under test.
client = mock.Mock(_http=transport, spec=["_http"])
client = mock.Mock(_http=transport, _connection=_Connection, spec=["_http"])
client._connection.API_BASE_URL = "https://storage.googleapis.com"
stream = io.BytesIO(data)
content_type = u"text/html"
response = blob._do_resumable_upload(
Expand Down Expand Up @@ -2114,7 +2118,8 @@ def _create_resumable_upload_session_helper(self, origin=None, side_effect=None)
# Create some mock arguments and call the method under test.
content_type = u"text/plain"
size = 10000
client = mock.Mock(_http=transport, spec=[u"_http"])
client = mock.Mock(_http=transport, _connection=_Connection, spec=[u"_http"])
client._connection.API_BASE_URL = "https://storage.googleapis.com"
new_url = blob.create_resumable_upload_session(
content_type=content_type, size=size, origin=origin, client=client
)
Expand Down
8 changes: 3 additions & 5 deletions tests/unit/test_client.py
Original file line number Diff line number Diff line change
Expand Up @@ -137,18 +137,16 @@ def test_ctor_w_empty_client_options(self):
)

def test_ctor_w_client_options_dict(self):

PROJECT = "PROJECT"
credentials = _make_credentials()
client_options = {"api_endpoint": "https://www.foo-googleapis.com"}
api_endpoint = "https://www.foo-googleapis.com"
client_options = {"api_endpoint": api_endpoint}

client = self._make_one(
project=PROJECT, credentials=credentials, client_options=client_options
)

self.assertEqual(
client._connection.API_BASE_URL, "https://www.foo-googleapis.com"
)
self.assertEqual(client._connection.API_BASE_URL, api_endpoint)

def test_ctor_w_client_options_object(self):
from google.api_core.client_options import ClientOptions
Expand Down