def open(self, filename, mode):
if 'wb' in mode:
fileobj = six.BytesIO()
self.filemap[filename] = fileobj
return closing(fileobj)
else:
return closing(self.filemap[filename])
def test_multipart_download_with_multiple_parts(self):
client = mock.Mock()
response_body = b'foobarbaz'
client.get_object.return_value = {'Body': six.BytesIO(response_body)}
# For testing purposes, we're testing with a multipart threshold
# of 4 bytes and a chunksize of 4 bytes. Given b'foobarbaz',
# this should result in 3 calls. In python slices this would be:
# r[0:4], r[4:8], r[8:9]. But the Range param will be slightly
# different because they use inclusive ranges.
config = TransferConfig(multipart_threshold=4,
multipart_chunksize=4)
downloader = MultipartDownloader(client, config,
InMemoryOSLayer({}),
SequentialExecutor)
downloader.download_file('bucket', 'key', 'filename',
len(response_body), {})
# We're storing these in **extra because the assertEqual
# below is really about verifying we have the correct value
# for the Range param.
extra = {'Bucket': 'bucket', 'Key': 'key'}
self.assertEqual(client.get_object.call_args_list,
# Note these are inclusive ranges.
[mock.call(Range='bytes=0-3', **extra),
mock.call(Range='bytes=4-7', **extra),
mock.call(Range='bytes=8-', **extra)])
def test_can_upload_archive(self):
body = six.BytesIO(b"bytes content")
response = self.client.upload_archive(vaultName=self.VAULT_NAME,
archiveDescription='test upload',
body=body)
self.assertEqual(response['ResponseMetadata']['HTTPStatusCode'], 201)
archive_id = response['archiveId']
response = self.client.delete_archive(vaultName=self.VAULT_NAME,
archiveId=archive_id)
self.assertEqual(response['ResponseMetadata']['HTTPStatusCode'], 204)
def test_download_below_multipart_threshold(self):
below_threshold = 20
osutil = InMemoryOSLayer({'smallfile': b'hello world'})
transfer = S3Transfer(self.client, osutil=osutil)
self.client.head_object.return_value = {
'ContentLength': below_threshold}
self.client.get_object.return_value = {
'Body': six.BytesIO(b'foobar')
}
transfer.download_file('bucket', 'key', 'smallfile')
self.client.get_object.assert_called_with(Bucket='bucket', Key='key')
def test_get_object_stream_is_retried_and_succeeds(self):
below_threshold = 20
osutil = InMemoryOSLayer({'smallfile': b'hello world'})
transfer = S3Transfer(self.client, osutil=osutil)
self.client.head_object.return_value = {
'ContentLength': below_threshold}
self.client.get_object.side_effect = [
# First request fails.
socket.error("fake error"),
# Second succeeds.
{'Body': six.BytesIO(b'foobar')}
]
transfer.download_file('bucket', 'key', '/tmp/smallfile')
self.assertEqual(self.client.get_object.call_count, 2)
def test_multipart_download_uses_correct_client_calls(self):
client = mock.Mock()
response_body = b'foobarbaz'
client.get_object.return_value = {'Body': six.BytesIO(response_body)}
downloader = MultipartDownloader(client, TransferConfig(),
InMemoryOSLayer({}),
SequentialExecutor)
downloader.download_file('bucket', 'key', 'filename',
len(response_body), {})
client.get_object.assert_called_with(
Range='bytes=0-',
Bucket='bucket',
Key='key'
)
def test_io_thread_failure_triggers_shutdown(self):
client = mock.Mock()
response_body = b'foobarbaz'
client.get_object.return_value = {'Body': six.BytesIO(response_body)}
os_layer = mock.Mock()
mock_fileobj = mock.MagicMock()
mock_fileobj.__enter__.return_value = mock_fileobj
mock_fileobj.write.side_effect = Exception("fake IO error")
os_layer.open.return_value = mock_fileobj
downloader = MultipartDownloader(client, TransferConfig(),
os_layer, SequentialExecutor)
# We're verifying that the exception raised from the IO future
# propogates back up via download_file().
with self.assertRaisesRegexp(Exception, "fake IO error"):
downloader.download_file('bucket', 'key', 'filename',
len(response_body), {})
def test_download_file_fowards_extra_args(self):
extra_args = {
'SSECustomerKey': 'foo',
'SSECustomerAlgorithm': 'AES256',
}
below_threshold = 20
osutil = InMemoryOSLayer({'smallfile': b'hello world'})
transfer = S3Transfer(self.client, osutil=osutil)
self.client.head_object.return_value = {
'ContentLength': below_threshold}
self.client.get_object.return_value = {
'Body': six.BytesIO(b'foobar')
}
transfer.download_file('bucket', 'key', '/tmp/smallfile',
extra_args=extra_args)
# Note that we need to invoke the HeadObject call
# and the PutObject call with the extra_args.
# This is necessary. Trying to HeadObject an SSE object
# will return a 400 if you don't provide the required
# params.
self.client.get_object.assert_called_with(
Bucket='bucket', Key='key', SSECustomerAlgorithm='AES256',
SSECustomerKey='foo')
def test_download_futures_fail_triggers_shutdown(self):
class FailedDownloadParts(SequentialExecutor):
def __init__(self, max_workers):
self.is_first = True
def submit(self, function):
future = super(FailedDownloadParts, self).submit(function)
if self.is_first:
# This is the download_parts_thread.
future.set_exception(
Exception("fake download parts error"))
self.is_first = False
return future
client = mock.Mock()
response_body = b'foobarbaz'
client.get_object.return_value = {'Body': six.BytesIO(response_body)}
downloader = MultipartDownloader(client, TransferConfig(),
InMemoryOSLayer({}),
FailedDownloadParts)
with self.assertRaisesRegexp(Exception, "fake download parts error"):
downloader.download_file('bucket', 'key', 'filename',
len(response_body), {})
def open_file_chunk_reader(self, filename, start_byte, size, callback):
return closing(six.BytesIO(self.filemap[filename]))
