def _send_media_body(self, start):
""" Send the entire stream in a single request.
Helper for :meth:`stream_file`:
:type start: integer
:param start: start byte of the range.
"""
self._ensure_initialized()
if self.total_size is None:
raise TransferInvalidError(
'Total size must be known for SendMediaBody')
body_stream = StreamSlice(self.stream, self.total_size - start)
request = Request(url=self.url, http_method='PUT', body=body_stream)
request.headers['Content-Type'] = self.mime_type
if start == self.total_size:
# End of an upload with 0 bytes left to send; just finalize.
range_string = 'bytes */%s' % self.total_size
else:
range_string = 'bytes %s-%s/%s' % (start, self.total_size - 1,
self.total_size)
request.headers['Content-Range'] = range_string
return self._send_media_request(request, self.total_size)
def _send_media_body(self, start):
""" Send the entire stream in a single request.
Helper for :meth:`stream_file`:
:type start: integer
:param start: start byte of the range.
"""
self._ensure_initialized()
if self.total_size is None:
raise TransferInvalidError(
'Total size must be known for SendMediaBody')
body_stream = StreamSlice(self.stream, self.total_size - start)
request = Request(url=self.url, http_method='PUT', body=body_stream)
request.headers['Content-Type'] = self.mime_type
if start == self.total_size:
# End of an upload with 0 bytes left to send; just finalize.
range_string = 'bytes */%s' % self.total_size
else:
range_string = 'bytes %s-%s/%s' % (start, self.total_size - 1,
self.total_size)
request.headers['Content-Range'] = range_string
return self._send_media_request(request, self.total_size)
def download_to_file(self, file_obj, client=None):
"""Download the contents of this blob into a file-like object.
:type file_obj: file
:param file_obj: A file handle to which to write the blob's data.
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the blob's bucket.
:raises: :class:`gcloud.exceptions.NotFound`
"""
client = self._require_client(client)
download_url = self.media_link
# Use apitools 'Download' facility.
download = Download.from_stream(file_obj)
if self.chunk_size is not None:
download.chunksize = self.chunk_size
request = Request(download_url, 'GET')
# Use the private ``_connection`` rather than the public
# ``.connection``, since the public connection may be a batch. A
# batch wraps a client's connection, but does not store the `http`
# object. The rest (API_BASE_URL and build_api_url) are also defined
# on the Batch class, but we just use the wrapped connection since
# it has all three (http, API_BASE_URL and build_api_url).
download.initialize_download(request, client._connection.http)
def _send_chunk(self, start):
"""Send a chunk of the stream.
Helper for :meth:`stream_file`:
:type start: integer
:param start: start byte of the range.
:rtype: :class:`gcloud.streaming.http_wrapper.Response`
:returns: The response from the chunked upload request.
"""
self._ensure_initialized()
no_log_body = self.total_size is None
if self.total_size is None:
# For the streaming resumable case, we need to detect when
# we're at the end of the stream.
body_stream = BufferedStream(
self.stream, start, self.chunksize)
end = body_stream.stream_end_position
if body_stream.stream_exhausted:
self._total_size = end
# Here, change body_stream from a stream to a string object,
# which means reading a chunk into memory. This works around
# https://code.google.com/p/httplib2/issues/detail?id=176 which can
# cause httplib2 to skip bytes on 401's for file objects.
body_stream = body_stream.read(self.chunksize)
else:
end = min(start + self.chunksize, self.total_size)
body_stream = StreamSlice(self.stream, end - start)
request = Request(url=self.url, http_method='PUT', body=body_stream)
request.headers['Content-Type'] = self.mime_type
if no_log_body:
# Disable logging of streaming body.
request.loggable_body = '<media body>'
if self.total_size is None:
# Streaming resumable upload case, unknown total size.
range_string = 'bytes %s-%s/*' % (start, end - 1)
elif end == start:
# End of an upload with 0 bytes left to send; just finalize.
range_string = 'bytes */%s' % self.total_size
else:
# Normal resumable upload case with known sizes.
range_string = 'bytes %s-%s/%s' % (start, end - 1, self.total_size)
request.headers['Content-Range'] = range_string
return self._send_media_request(request, end)
def _send_chunk(self, start):
"""Send a chunk of the stream.
Helper for :meth:`stream_file`:
:type start: integer
:param start: start byte of the range.
:rtype: :class:`gcloud.streaming.http_wrapper.Response`
:returns: The response from the chunked upload request.
"""
self._ensure_initialized()
no_log_body = self.total_size is None
if self.total_size is None:
# For the streaming resumable case, we need to detect when
# we're at the end of the stream.
body_stream = BufferedStream(self.stream, start, self.chunksize)
end = body_stream.stream_end_position
if body_stream.stream_exhausted:
self._total_size = end
# Here, change body_stream from a stream to a string object,
# which means reading a chunk into memory. This works around
# https://code.google.com/p/httplib2/issues/detail?id=176 which can
# cause httplib2 to skip bytes on 401's for file objects.
body_stream = body_stream.read(self.chunksize)
else:
end = min(start + self.chunksize, self.total_size)
body_stream = StreamSlice(self.stream, end - start)
request = Request(url=self.url, http_method='PUT', body=body_stream)
request.headers['Content-Type'] = self.mime_type
if no_log_body:
# Disable logging of streaming body.
request.loggable_body = '<media body>'
if self.total_size is None:
# Streaming resumable upload case, unknown total size.
range_string = 'bytes %s-%s/*' % (start, end - 1)
elif end == start:
# End of an upload with 0 bytes left to send; just finalize.
range_string = 'bytes */%s' % self.total_size
else:
# Normal resumable upload case with known sizes.
range_string = 'bytes %s-%s/%s' % (start, end - 1, self.total_size)
request.headers['Content-Range'] = range_string
return self._send_media_request(request, end)
def _get_chunk(self, start, end):
"""Retrieve a chunk of the file.
:type start: integer
:param start: start byte of the range.
:type end: integer or None
:param end: end byte of the range.
:rtype: :class:`gcloud.streaming.http_wrapper.Response`
:returns: response from the chunk request.
"""
self._ensure_initialized()
request = Request(url=self.url)
self._set_range_header(request, start, end=end)
return make_api_request(self.bytes_http,
request,
retries=self.num_retries)
def refresh_upload_state(self):
"""Refresh the state of a resumable upload via query to the back-end.
"""
if self.strategy != RESUMABLE_UPLOAD:
return
self._ensure_initialized()
# NOTE: Per RFC 2616[1]/7231[2], a 'PUT' request is inappropriate
# here: it is intended to be used to replace the entire
# resource, not to query for a status.
#
# If the back-end doesn't provide a way to query for this state
# via a 'GET' request, somebody should be spanked.
#
# The violation is documented[3].
#
# [1] http://www.w3.org/Protocols/rfc2616/rfc2616-sec9.html#sec9.6
# [2] http://tools.ietf.org/html/rfc7231#section-4.3.4
# [3]
# https://cloud.google.com/storage/docs/json_api/v1/how-tos/upload#resume-upload
refresh_request = Request(url=self.url,
http_method='PUT',
headers={'Content-Range': 'bytes */*'})
refresh_response = make_api_request(self.http,
refresh_request,
redirections=0,
retries=self.num_retries)
range_header = self._get_range_header(refresh_response)
if refresh_response.status_code in (http_client.OK,
http_client.CREATED):
self._complete = True
self._progress = self.total_size
self.stream.seek(self.progress)
# If we're finished, the refresh response will contain the metadata
# originally requested. Cache it so it can be returned in
# StreamInChunks.
self._final_response = refresh_response
elif refresh_response.status_code == RESUME_INCOMPLETE:
if range_header is None:
self._progress = 0
else:
self._progress = self._last_byte(range_header) + 1
self.stream.seek(self.progress)
else:
raise HttpError.from_response(refresh_response)
def upload_from_file(self, # pylint: disable=R0913,R0914
file_obj,
source_format,
rewind=False,
size=None,
num_retries=6,
allow_jagged_rows=None,
allow_quoted_newlines=None,
create_disposition=None,
encoding=None,
field_delimiter=None,
ignore_unknown_values=None,
max_bad_records=None,
quote_character=None,
skip_leading_rows=None,
write_disposition=None,
client=None):
"""Upload the contents of this table from a file-like object.
The content type of the upload will either be
- The value passed in to the function (if any)
- ``text/csv``.
:type file_obj: file
:param file_obj: A file handle open for reading.
:type source_format: str
:param source_format: one of 'CSV' or 'NEWLINE_DELIMITED_JSON'.
job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type rewind: boolean
:param rewind: If True, seek to the beginning of the file handle before
writing the file to Cloud Storage.
:type size: int
:param size: The number of bytes to read from the file handle.
If not provided, we'll try to guess the size using
:func:`os.fstat`. (If the file handle is not from the
filesystem this won't be possible.)
:type num_retries: integer
:param num_retries: Number of upload retries. Defaults to 6.
:type allow_jagged_rows: boolean
:param allow_jagged_rows: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type allow_quoted_newlines: boolean
:param allow_quoted_newlines: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type create_disposition: str
:param create_disposition: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type encoding: str
:param encoding: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type field_delimiter: str
:param field_delimiter: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type ignore_unknown_values: boolean
:param ignore_unknown_values: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type max_bad_records: integer
:param max_bad_records: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type quote_character: str
:param quote_character: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type skip_leading_rows: integer
:param skip_leading_rows: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type write_disposition: str
:param write_disposition: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the current dataset.
:rtype: :class:`gcloud.bigquery.jobs.LoadTableFromStorageJob`
:returns: the job instance used to load the data (e.g., for
querying status)
:raises: :class:`ValueError` if size is not passed in and can not be
determined
"""
client = self._require_client(client)
connection = client.connection
content_type = 'application/octet-stream'
# Rewind the file if desired.
if rewind:
file_obj.seek(0, os.SEEK_SET)
# Get the basic stats about the file.
total_bytes = size
if total_bytes is None:
if hasattr(file_obj, 'fileno'):
total_bytes = os.fstat(file_obj.fileno()).st_size
else:
raise ValueError('total bytes could not be determined. Please '
'pass an explicit size.')
headers = {
'Accept': 'application/json',
'Accept-Encoding': 'gzip, deflate',
'User-Agent': connection.USER_AGENT,
'content-type': 'application/json',
}
metadata = {
'configuration': {
'load': {
'sourceFormat': source_format,
'schema': {
'fields': _build_schema_resource(self._schema),
},
'destinationTable': {
'projectId': self._dataset.project,
'datasetId': self._dataset.name,
'tableId': self.name,
}
}
}
}
_configure_job_metadata(metadata, allow_jagged_rows,
allow_quoted_newlines, create_disposition,
encoding, field_delimiter,
ignore_unknown_values, max_bad_records,
quote_character, skip_leading_rows,
write_disposition)
upload = Upload(file_obj, content_type, total_bytes,
auto_transfer=False)
url_builder = _UrlBuilder()
upload_config = _UploadConfig()
# Base URL may change once we know simple vs. resumable.
base_url = connection.API_BASE_URL + '/upload'
path = '/projects/%s/jobs' % (self._dataset.project,)
upload_url = connection.build_api_url(api_base_url=base_url, path=path)
# Use apitools 'Upload' facility.
request = Request(upload_url, 'POST', headers,
body=json.dumps(metadata))
upload.configure_request(upload_config, request, url_builder)
query_params = url_builder.query_params
base_url = connection.API_BASE_URL + '/upload'
request.url = connection.build_api_url(api_base_url=base_url,
path=path,
query_params=query_params)
upload.initialize_upload(request, connection.http)
if upload.strategy == RESUMABLE_UPLOAD:
http_response = upload.stream_file(use_chunks=True)
else:
http_response = make_api_request(connection.http, request,
retries=num_retries)
response_content = http_response.content
if not isinstance(response_content,
six.string_types): # pragma: NO COVER Python3
response_content = response_content.decode('utf-8')
return client.job_from_resource(json.loads(response_content))
def upload_from_file(self, file_obj, rewind=False, size=None,
encryption_key=None, content_type=None, num_retries=6,
client=None):
"""Upload the contents of this blob from a file-like object.
The content type of the upload will either be
- The value passed in to the function (if any)
- The value stored on the current blob
- The default value of 'application/octet-stream'
.. note::
The effect of uploading to an existing blob depends on the
"versioning" and "lifecycle" policies defined on the blob's
bucket. In the absence of those policies, upload will
overwrite any existing contents.
See the `object versioning
<https://cloud.google.com/storage/docs/object-versioning>`_ and
`lifecycle <https://cloud.google.com/storage/docs/lifecycle>`_
API documents for details.
Uploading a file with a `customer-supplied`_ encryption key::
>>> from gcloud import storage
>>> from gcloud.storage import Blob
>>> client = storage.Client(project='my-project')
>>> bucket = client.get_bucket('my-bucket')
>>> encryption_key = 'aa426195405adee2c8081bb9e7e74b19'
>>> blob = Blob('secure-data', bucket)
>>> with open('my-file', 'rb') as my_file:
>>> blob.upload_from_file(my_file,
... encryption_key=encryption_key)
The ``encryption_key`` should be a str or bytes with a length of at
least 32.
.. _customer-supplied: https://cloud.google.com/storage/docs/\
encryption#customer-supplied
:type file_obj: file
:param file_obj: A file handle open for reading.
:type rewind: boolean
:param rewind: If True, seek to the beginning of the file handle before
writing the file to Cloud Storage.
:type size: int
:param size: The number of bytes to read from the file handle.
If not provided, we'll try to guess the size using
:func:`os.fstat`. (If the file handle is not from the
filesystem this won't be possible.)
:type encryption_key: str or bytes
:param encryption_key: Optional 32 byte encryption key for
customer-supplied encryption.
:type content_type: string or ``NoneType``
:param content_type: Optional type of content being uploaded.
:type num_retries: integer
:param num_retries: Number of upload retries. Defaults to 6.
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the blob's bucket.
:raises: :class:`ValueError` if size is not passed in and can not be
determined; :class:`gcloud.exceptions.GCloudError` if the
upload response returns an error status.
"""
client = self._require_client(client)
# Use the private ``_connection`` rather than the public
# ``.connection``, since the public connection may be a batch. A
# batch wraps a client's connection, but does not store the `http`
# object. The rest (API_BASE_URL and build_api_url) are also defined
# on the Batch class, but we just use the wrapped connection since
# it has all three (http, API_BASE_URL and build_api_url).
connection = client._connection
content_type = (content_type or self._properties.get('contentType') or
'application/octet-stream')
# Rewind the file if desired.
if rewind:
file_obj.seek(0, os.SEEK_SET)
# Get the basic stats about the file.
total_bytes = size
if total_bytes is None:
if hasattr(file_obj, 'fileno'):
total_bytes = os.fstat(file_obj.fileno()).st_size
else:
raise ValueError('total bytes could not be determined. Please '
'pass an explicit size.')
headers = {
'Accept': 'application/json',
'Accept-Encoding': 'gzip, deflate',
'User-Agent': connection.USER_AGENT,
}
if encryption_key:
_set_encryption_headers(encryption_key, headers)
upload = Upload(file_obj, content_type, total_bytes,
auto_transfer=False)
if self.chunk_size is not None:
upload.chunksize = self.chunk_size
url_builder = _UrlBuilder(bucket_name=self.bucket.name,
object_name=self.name)
upload_config = _UploadConfig()
# Temporary URL, until we know simple vs. resumable.
base_url = connection.API_BASE_URL + '/upload'
upload_url = connection.build_api_url(api_base_url=base_url,
path=self.bucket.path + '/o')
# Use apitools 'Upload' facility.
request = Request(upload_url, 'POST', headers)
upload.configure_request(upload_config, request, url_builder)
query_params = url_builder.query_params
base_url = connection.API_BASE_URL + '/upload'
request.url = connection.build_api_url(api_base_url=base_url,
path=self.bucket.path + '/o',
query_params=query_params)
upload.initialize_upload(request, connection.http)
if upload.strategy == RESUMABLE_UPLOAD:
http_response = upload.stream_file(use_chunks=True)
else:
http_response = make_api_request(connection.http, request,
retries=num_retries)
self._check_response_error(request, http_response)
response_content = http_response.content
if not isinstance(response_content,
six.string_types): # pragma: NO COVER Python3
response_content = response_content.decode('utf-8')
self._set_properties(json.loads(response_content))
def upload_from_file(self, # pylint: disable=R0913,R0914
file_obj,
source_format,
rewind=False,
size=None,
num_retries=6,
allow_jagged_rows=None,
allow_quoted_newlines=None,
create_disposition=None,
encoding=None,
field_delimiter=None,
ignore_unknown_values=None,
max_bad_records=None,
quote_character=None,
skip_leading_rows=None,
write_disposition=None,
client=None):
"""Upload the contents of this table from a file-like object.
The content type of the upload will either be
- The value passed in to the function (if any)
- ``text/csv``.
:type file_obj: file
:param file_obj: A file handle open for reading.
:type source_format: string
:param source_format: one of 'CSV' or 'NEWLINE_DELIMITED_JSON'.
job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type rewind: boolean
:param rewind: If True, seek to the beginning of the file handle before
writing the file to Cloud Storage.
:type size: int
:param size: The number of bytes to read from the file handle.
If not provided, we'll try to guess the size using
:func:`os.fstat`. (If the file handle is not from the
filesystem this won't be possible.)
:type num_retries: integer
:param num_retries: Number of upload retries. Defaults to 6.
:type allow_jagged_rows: boolean
:param allow_jagged_rows: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type allow_quoted_newlines: boolean
:param allow_quoted_newlines: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type create_disposition: string
:param create_disposition: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type encoding: string
:param encoding: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type field_delimiter: string
:param field_delimiter: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type ignore_unknown_values: boolean
:param ignore_unknown_values: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type max_bad_records: integer
:param max_bad_records: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type quote_character: string
:param quote_character: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type skip_leading_rows: integer
:param skip_leading_rows: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type write_disposition: string
:param write_disposition: job configuration option; see
:meth:`gcloud.bigquery.job.LoadJob`
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the current dataset.
:rtype: :class:`gcloud.bigquery.jobs.LoadTableFromStorageJob`
:returns: the job instance used to load the data (e.g., for
querying status)
:raises: :class:`ValueError` if size is not passed in and can not be
determined
"""
client = self._require_client(client)
connection = client.connection
content_type = 'application/octet-stream'
# Rewind the file if desired.
if rewind:
file_obj.seek(0, os.SEEK_SET)
# Get the basic stats about the file.
total_bytes = size
if total_bytes is None:
if hasattr(file_obj, 'fileno'):
total_bytes = os.fstat(file_obj.fileno()).st_size
else:
raise ValueError('total bytes could not be determined. Please '
'pass an explicit size.')
headers = {
'Accept': 'application/json',
'Accept-Encoding': 'gzip, deflate',
'User-Agent': connection.USER_AGENT,
'content-type': 'application/json',
}
metadata = {
'configuration': {
'load': {
'sourceFormat': source_format,
'schema': {
'fields': _build_schema_resource(self._schema),
},
'destinationTable': {
'projectId': self._dataset.project,
'datasetId': self._dataset.name,
'tableId': self.name,
}
}
}
}
_configure_job_metadata(metadata, allow_jagged_rows,
allow_quoted_newlines, create_disposition,
encoding, field_delimiter,
ignore_unknown_values, max_bad_records,
quote_character, skip_leading_rows,
write_disposition)
upload = Upload(file_obj, content_type, total_bytes,
auto_transfer=False)
url_builder = _UrlBuilder()
upload_config = _UploadConfig()
# Base URL may change once we know simple vs. resumable.
base_url = connection.API_BASE_URL + '/upload'
path = '/projects/%s/jobs' % (self._dataset.project,)
upload_url = connection.build_api_url(api_base_url=base_url, path=path)
# Use apitools 'Upload' facility.
request = Request(upload_url, 'POST', headers,
body=json.dumps(metadata))
upload.configure_request(upload_config, request, url_builder)
query_params = url_builder.query_params
base_url = connection.API_BASE_URL + '/upload'
request.url = connection.build_api_url(api_base_url=base_url,
path=path,
query_params=query_params)
upload.initialize_upload(request, connection.http)
if upload.strategy == RESUMABLE_UPLOAD:
http_response = upload.stream_file(use_chunks=True)
else:
http_response = make_api_request(connection.http, request,
retries=num_retries)
response_content = http_response.content
if not isinstance(response_content,
six.string_types): # pragma: NO COVER Python3
response_content = response_content.decode('utf-8')
return client.job_from_resource(json.loads(response_content))
def upload_from_file(self,
file_obj,
rewind=False,
size=None,
content_type=None,
num_retries=6,
client=None):
"""Upload the contents of this blob from a file-like object.
The content type of the upload will either be
- The value passed in to the function (if any)
- The value stored on the current blob
- The default value of 'application/octet-stream'
.. note::
The effect of uploading to an existing blob depends on the
"versioning" and "lifecycle" policies defined on the blob's
bucket. In the absence of those policies, upload will
overwrite any existing contents.
See the `object versioning
<https://cloud.google.com/storage/docs/object-versioning>`_ and
`lifecycle <https://cloud.google.com/storage/docs/lifecycle>`_
API documents for details.
:type file_obj: file
:param file_obj: A file handle open for reading.
:type rewind: boolean
:param rewind: If True, seek to the beginning of the file handle before
writing the file to Cloud Storage.
:type size: int
:param size: The number of bytes to read from the file handle.
If not provided, we'll try to guess the size using
:func:`os.fstat`. (If the file handle is not from the
filesystem this won't be possible.)
:type content_type: string or ``NoneType``
:param content_type: Optional type of content being uploaded.
:type num_retries: integer
:param num_retries: Number of upload retries. Defaults to 6.
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the blob's bucket.
:raises: :class:`ValueError` if size is not passed in and can not be
determined
"""
client = self._require_client(client)
# Use the private ``_connection`` rather than the public
# ``.connection``, since the public connection may be a batch. A
# batch wraps a client's connection, but does not store the `http`
# object. The rest (API_BASE_URL and build_api_url) are also defined
# on the Batch class, but we just use the wrapped connection since
# it has all three (http, API_BASE_URL and build_api_url).
connection = client._connection
content_type = (content_type or self._properties.get('contentType')
or 'application/octet-stream')
# Rewind the file if desired.
if rewind:
file_obj.seek(0, os.SEEK_SET)
# Get the basic stats about the file.
total_bytes = size
if total_bytes is None:
if hasattr(file_obj, 'fileno'):
total_bytes = os.fstat(file_obj.fileno()).st_size
else:
raise ValueError('total bytes could not be determined. Please '
'pass an explicit size.')
headers = {
'Accept': 'application/json',
'Accept-Encoding': 'gzip, deflate',
'User-Agent': connection.USER_AGENT,
}
upload = Upload(file_obj,
content_type,
total_bytes,
auto_transfer=False)
if self.chunk_size is not None:
upload.chunksize = self.chunk_size
url_builder = _UrlBuilder(bucket_name=self.bucket.name,
object_name=self.name)
upload_config = _UploadConfig()
# Temporary URL, until we know simple vs. resumable.
base_url = connection.API_BASE_URL + '/upload'
upload_url = connection.build_api_url(api_base_url=base_url,
path=self.bucket.path + '/o')
# Use apitools 'Upload' facility.
request = Request(upload_url, 'POST', headers)
upload.configure_request(upload_config, request, url_builder)
query_params = url_builder.query_params
base_url = connection.API_BASE_URL + '/upload'
request.url = connection.build_api_url(api_base_url=base_url,
path=self.bucket.path + '/o',
query_params=query_params)
upload.initialize_upload(request, connection.http)
if upload.strategy == RESUMABLE_UPLOAD:
http_response = upload.stream_file(use_chunks=True)
else:
http_response = make_api_request(connection.http,
request,
retries=num_retries)
response_content = http_response.content
if not isinstance(response_content,
six.string_types): # pragma: NO COVER Python3
response_content = response_content.decode('utf-8')
self._set_properties(json.loads(response_content))
def download_to_file(self, file_obj, encryption_key=None, client=None):
"""Download the contents of this blob into a file-like object.
.. note::
If the server-set property, :attr:`media_link`, is not yet
initialized, makes an additional API request to load it.
Downloading a file that has been encrypted with a `customer-supplied`_
encryption key::
>>> from gcloud import storage
>>> from gcloud.storage import Blob
>>> client = storage.Client(project='my-project')
>>> bucket = client.get_bucket('my-bucket')
>>> encryption_key = 'aa426195405adee2c8081bb9e7e74b19'
>>> blob = Blob('secure-data', bucket)
>>> with open('/tmp/my-secure-file', 'wb') as file_obj:
>>> blob.download_to_file(file_obj,
... encryption_key=encryption_key)
The ``encryption_key`` should be a str or bytes with a length of at
least 32.
.. _customer-supplied: https://cloud.google.com/storage/docs/\
encryption#customer-supplied
:type file_obj: file
:param file_obj: A file handle to which to write the blob's data.
:type encryption_key: str or bytes
:param encryption_key: Optional 32 byte encryption key for
customer-supplied encryption.
:type client: :class:`gcloud.storage.client.Client` or ``NoneType``
:param client: Optional. The client to use. If not passed, falls back
to the ``client`` stored on the blob's bucket.
:raises: :class:`gcloud.exceptions.NotFound`
"""
client = self._require_client(client)
if self.media_link is None: # not yet loaded
self.reload()
download_url = self.media_link
# Use apitools 'Download' facility.
download = Download.from_stream(file_obj)
if self.chunk_size is not None:
download.chunksize = self.chunk_size
headers = {}
if encryption_key:
_set_encryption_headers(encryption_key, headers)
request = Request(download_url, 'GET', headers)
# Use the private ``_connection`` rather than the public
# ``.connection``, since the public connection may be a batch. A
# batch wraps a client's connection, but does not store the `http`
# object. The rest (API_BASE_URL and build_api_url) are also defined
# on the Batch class, but we just use the wrapped connection since
# it has all three (http, API_BASE_URL and build_api_url).
download.initialize_download(request, client._connection.http)