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# Copyright 2011-2013 Amazon.com, Inc. or its affiliates. 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. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
module AWS
class EC2
# Client class for Amazon Elastic Compute Cloud (EC2).
class Client < Core::QueryClient
API_VERSION = '2014-10-01'
signature_version :Version4, 'ec2'
def retryable_error?(response)
if response.error.is_a?(Errors::InsufficientInstanceCapacity)
false
else
super
end
end
# @api private
CACHEABLE_REQUESTS = Set[
:describe_addresses,
:describe_availability_zones,
:describe_bundle_tasks,
:describe_customer_gateways,
:describe_dhcp_options,
:describe_image_attribute,
:describe_images,
:describe_instances,
:describe_key_pairs,
:describe_regions,
:describe_reserved_instances,
:describe_reserved_instances_offerings,
:describe_security_groups,
:describe_snapshot_attribute,
:describe_snapshots,
:describe_subnets,
:describe_volume_status,
:describe_volumes,
:describe_vpcs,
:describe_vpn_connections,
:describe_vpn_gateways,
:describe_instance_attribute,
:describe_spot_instance_requests,
:describe_spot_price_history,
:describe_spot_datafeed_subscription,
:describe_licenses,
:describe_placement_groups,
:describe_tags,
:describe_internet_gateways,
:describe_route_tables,
:describe_network_acls,
:describe_instance_status,
:describe_conversion_tasks,
:describe_network_interfaces,
:describe_network_interface_attribute,
]
protected
# @return [Core::Signers::Version2]
def v2_signer
@v2_signer ||= Core::Signers::Version2.new(credential_provider)
end
# @return [Core::Signers::Version4]
def v4_signer
@v4_signer ||=
Core::Signers::Version4.new(credential_provider, 'ec2', @region)
end
end
class Client::V20130815 < Client
define_client_methods('2013-08-15')
end
class Client::V20131001 < Client
define_client_methods('2013-10-01')
end
class Client::V20131015 < Client
define_client_methods('2013-10-15')
end
class Client::V20140201 < Client
define_client_methods('2014-02-01')
end
class Client::V20140501 < Client
define_client_methods('2014-05-01')
end
class Client::V20140901 < Client
define_client_methods('2014-09-01')
end
class Client::V20141001 < Client
define_client_methods('2014-10-01')
alias basic_copy_snapshot copy_snapshot
def copy_snapshot(params = {})
# Adding logic to auto-compute the destination group and presigned
# url params for the copy snapshot operation. This is necessary
# when calling copy snapshot on snapshots for encrypted volumes.
# This addition should be transparent to the API user.
params = params.dup
params[:destination_region] = @region
params[:presigned_url] = presigned_copy_snapshot_url(params)
basic_copy_snapshot(params)
end
private
def presigned_copy_snapshot_url(params)
token = credential_provider.session_token
client = self.with_options(:ec2_region => params[:source_region])
req = client.build_request(:copy_snapshot, params)
now = req.remove_param("Timestamp").value
now = Time.parse(now).strftime("%Y%m%dT%H%M%SZ")
req.add_param("X-Amz-Algorithm", "AWS4-HMAC-SHA256")
req.add_param("X-Amz-Date", now)
req.add_param("X-Amz-SignedHeaders", 'host')
req.add_param("X-Amz-Expires", "3600")
req.add_param('X-Amz-Security-Token', token) if token
req.add_param("X-Amz-Credential", client.v4_signer.credential(now))
req.http_method = 'GET'
req.uri = '/?' + req.url_encoded_params
req.body = ''
req.headers.clear
req.headers['host'] = client.config.ec2_endpoint
key = client.v4_signer.derive_key(now)
sig = client.v4_signer.signature(req, key, now, client.v4_signer.class::EMPTY_DIGEST)
req.add_param('X-Amz-Signature', sig)
req.endpoint + '/?' + req.url_encoded_params
end
end
end
end
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