[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/gslib/cloud_api_helper.py

Index: third_party/gsutil/gslib/cloud_api_helper.py
diff --git a/third_party/gsutil/gslib/cloud_api_helper.py b/third_party/gsutil/gslib/cloud_api_helper.py
new file mode 100644
index 0000000000000000000000000000000000000000..c570bb15dfed8bfbfa58ef5836be3040d72e1940
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+++ b/third_party/gsutil/gslib/cloud_api_helper.py
@@ -0,0 +1,65 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 Google Inc. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Helper functions for Cloud API implementations."""
+
+from __future__ import absolute_import
+
+from gslib.cloud_api import ArgumentException
+
+
+def ValidateDstObjectMetadata(dst_obj_metadata):
+  """Ensures dst_obj_metadata supplies the needed fields for copy and insert.
+
+  Args:
+    dst_obj_metadata: Metadata to validate.
+
+  Raises:
+    ArgumentException if metadata is invalid.
+  """
+  if not dst_obj_metadata:
+    raise ArgumentException(
+        'No object metadata supplied for destination object.')
+  if not dst_obj_metadata.name:
+    raise ArgumentException(
+        'Object metadata supplied for destination object had no object name.')
+  if not dst_obj_metadata.bucket:
+    raise ArgumentException(
+        'Object metadata supplied for destination object had no bucket name.')
+
+
+def GetDownloadSerializationDict(src_obj_metadata):
+  """Returns a baseline serialization dict from the source object metadata.
+
+  There are four entries:
+    auto_transfer: JSON-specific field, always False.
+    progress: How much of the download has already been completed. Caller
+              should override this value if the download is being resumed.
+    total_size: Total object size.
+    url: Implementation-specific field used for saving a metadata get call.
+         For JSON, this the download URL of the object.
+         For XML, this is a pickled boto key.
+
+  Args:
+    src_obj_metadata: Object to be downloaded.
+
+  Returns:
+    Serialization dict for use with Cloud API GetObjectMedia.
+  """
+  return {
+      'auto_transfer': 'False',
+      'progress': 0,
+      'total_size': src_obj_metadata.size,
+      'url': src_obj_metadata.mediaLink
+  }