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# -*- coding: utf-8 -*-
# Minio Python Library for Amazon S3 Compatible Cloud Storage, (C) 2015 Minio, Inc.
#
# 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.
"""
minio.xml_marshal
~~~~~~~~~~~~~~~
This module contains the simple wrappers for XML marshaller's.
:copyright: (c) 2015 by Minio, Inc.
:license: Apache 2.0, see LICENSE for more details.
"""
from __future__ import absolute_import
import io
from xml.etree import ElementTree as s3_xml
_S3_NAMESPACE = 'http://s3.amazonaws.com/doc/2006-03-01/'
def xml_marshal_bucket_constraint(region):
"""
Marshal's bucket constraint based on *region*.
:param region: Region name of a given bucket.
:return: Marshalled XML data.
"""
root = s3_xml.Element('CreateBucketConfiguration', {'xmlns': _S3_NAMESPACE})
location_constraint = s3_xml.SubElement(root, 'LocationConstraint')
location_constraint.text = region
data = io.BytesIO()
s3_xml.ElementTree(root).write(data, encoding=None, xml_declaration=False)
return data.getvalue()
def xml_marshal_complete_multipart_upload(uploaded_parts):
"""
Marshal's complete multipart upload request based on *uploaded_parts*.
:param uploaded_parts: List of all uploaded parts, ordered by part number.
:return: Marshalled XML data.
"""
root = s3_xml.Element('CompleteMultipartUpload', {'xmlns': _S3_NAMESPACE})
for uploaded_part in uploaded_parts:
part_number = uploaded_part.part_number
part = s3_xml.SubElement(root, 'Part')
part_num = s3_xml.SubElement(part, 'PartNumber')
part_num.text = str(part_number)
etag = s3_xml.SubElement(part, 'ETag')
etag.text = '"' + uploaded_part.etag + '"'
data = io.BytesIO()
s3_xml.ElementTree(root).write(data, encoding=None,
xml_declaration=False)
return data.getvalue()
def xml_marshal_bucket_notifications(notifications):
"""
Marshals the notifications structure for sending to S3 compatible storage
:param notifications: Dictionary with following structure:
{
'TopicConfigurations': [
{
'Id': 'string',
'Arn': 'string',
'Events': [
's3:ReducedRedundancyLostObject'|'s3:ObjectCreated:*'|'s3:ObjectCreated:Put'|'s3:ObjectCreated:Post'|'s3:ObjectCreated:Copy'|'s3:ObjectCreated:CompleteMultipartUpload'|'s3:ObjectRemoved:*'|'s3:ObjectRemoved:Delete'|'s3:ObjectRemoved:DeleteMarkerCreated',
],
'Filter': {
'Key': {
'FilterRules': [
{
'Name': 'prefix'|'suffix',
'Value': 'string'
},
]
}
}
},
],
'QueueConfigurations': [
{
'Id': 'string',
'Arn': 'string',
'Events': [
's3:ReducedRedundancyLostObject'|'s3:ObjectCreated:*'|'s3:ObjectCreated:Put'|'s3:ObjectCreated:Post'|'s3:ObjectCreated:Copy'|'s3:ObjectCreated:CompleteMultipartUpload'|'s3:ObjectRemoved:*'|'s3:ObjectRemoved:Delete'|'s3:ObjectRemoved:DeleteMarkerCreated',
],
'Filter': {
'Key': {
'FilterRules': [
{
'Name': 'prefix'|'suffix',
'Value': 'string'
},
]
}
}
},
],
'CloudFunctionConfigurations': [
{
'Id': 'string',
'Arn': 'string',
'Events': [
's3:ReducedRedundancyLostObject'|'s3:ObjectCreated:*'|'s3:ObjectCreated:Put'|'s3:ObjectCreated:Post'|'s3:ObjectCreated:Copy'|'s3:ObjectCreated:CompleteMultipartUpload'|'s3:ObjectRemoved:*'|'s3:ObjectRemoved:Delete'|'s3:ObjectRemoved:DeleteMarkerCreated',
],
'Filter': {
'Key': {
'FilterRules': [
{
'Name': 'prefix'|'suffix',
'Value': 'string'
},
]
}
}
},
]
}
:return: Marshalled XML data
"""
root = s3_xml.Element('NotificationConfiguration', {'xmlns': _S3_NAMESPACE})
_add_notification_config_to_xml(
root,
'TopicConfiguration',
notifications.get('TopicConfigurations', [])
)
_add_notification_config_to_xml(
root,
'QueueConfiguration',
notifications.get('QueueConfigurations', [])
)
_add_notification_config_to_xml(
root,
'CloudFunctionConfiguration',
notifications.get('CloudFunctionConfigurations', [])
)
data = io.BytesIO()
s3_xml.ElementTree(root).write(data, encoding=None, xml_declaration=False)
return data.getvalue()
NOTIFICATIONS_ARN_FIELDNAME_MAP = {
'TopicConfiguration': 'Topic',
'QueueConfiguration': 'Queue',
'CloudFunctionConfiguration': 'CloudFunction',
}
def _add_notification_config_to_xml(node, element_name, configs):
"""
Internal function that builds the XML sub-structure for a given
kind of notification configuration.
"""
for config in configs:
config_node = s3_xml.SubElement(node, element_name)
if 'Id' in config:
id_node = s3_xml.SubElement(config_node, 'Id')
id_node.text = config['Id']
arn_node = s3_xml.SubElement(
config_node,
NOTIFICATIONS_ARN_FIELDNAME_MAP[element_name]
)
arn_node.text = config['Arn']
for event in config['Events']:
event_node = s3_xml.SubElement(config_node, 'Event')
event_node.text = event
filter_rules = config_node.get('Filter', {}).get(
'Key', {}).get('FilterRules', [])
if filter_rules:
filter_node = s3_xml.SubElement(config_node, 'Filter')
s3key_node = s3_xml.SubElement(filter_node, 'S3Key')
for filter_rule in filter_rules:
filter_rule_node = s3_xml.SubElement(s3key_node, 'FilterRule')
name_node = s3_xml.SubElement(filter_rule_node, 'Name')
name_node.text = filter_rule['Name']
value_node = s3_xml.SubElement(filter_rule_node, 'Value')
value_node.text = filter_rule['Value']
return node
def xml_marshal_delete_objects(object_names):
"""
Marshal Multi-Object Delete request body from object names.
:param object_names: List of object keys to be deleted.
:return: Serialized XML string for multi-object delete request body.
"""
root = s3_xml.Element('Delete')
# use quiet mode in the request - this causes the S3 Server to
# limit its response to only object keys that had errors during
# the delete operation.
quiet = s3_xml.SubElement(root, 'Quiet')
quiet.text = "true"
# add each object to the request.
for object_name in object_names:
object_elt = s3_xml.SubElement(root, 'Object')
key_elt = s3_xml.SubElement(object_elt, 'Key')
key_elt.text = object_name
# return the marshalled xml.
data = io.BytesIO()
s3_xml.ElementTree(root).write(data, encoding=None, xml_declaration=False)
return data.getvalue()