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AmazonS3ControlConfig.Extension.cs
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AmazonS3ControlConfig.Extension.cs
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/*
* Copyright 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.
*/
using Amazon.Runtime;
using Amazon.Runtime.CredentialManagement;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace Amazon.S3Control
{
public partial class AmazonS3ControlConfig : ClientConfig
{
private const string UseArnRegionEnvName = "AWS_S3_USE_ARN_REGION";
private const string AwsProfileEnvironmentVariable = "AWS_PROFILE";
private const string DefaultProfileName = "default";
private static CredentialProfileStoreChain credentialProfileChain = new CredentialProfileStoreChain();
// we cache this per execution process to avoid excessive file I/O
private static CredentialProfile _profile;
private static object _triedToResolveProfileLock = new object();
private static bool _triedToResolveProfile = false;
bool? _useArnRegion;
private object _useArnRegionLock = new object();
/// <summary>
/// If set to true and the service package supports it the region identified in the arn for a resource
/// will be used when making the service request.
/// </summary>
public bool UseArnRegion
{
get
{
if (_useArnRegion.HasValue)
{
return _useArnRegion.GetValueOrDefault();
}
if (!_triedToResolveProfile)
{
lock (_triedToResolveProfileLock)
{
if (!_triedToResolveProfile)
{
var profileName = Environment.GetEnvironmentVariable(AwsProfileEnvironmentVariable) ?? DefaultProfileName;
credentialProfileChain.TryGetProfile(profileName, out _profile);
_triedToResolveProfile = true;
}
}
}
lock (_useArnRegionLock)
{
if (_useArnRegion.HasValue)
{
return _useArnRegion.Value;
}
_useArnRegion = _profile?.S3UseArnRegion;
if (!_useArnRegion.HasValue && !string.IsNullOrEmpty(Environment.GetEnvironmentVariable(UseArnRegionEnvName)))
{
if (bool.TryParse(Environment.GetEnvironmentVariable(UseArnRegionEnvName), out var value))
{
_useArnRegion = value;
}
}
if (!_useArnRegion.HasValue)
{
// To maintain consistency with buckets default UseArnRegion to true when client configured for us-east-1.
_useArnRegion = RegionEndpoint?.SystemName == RegionEndpoint.USEast1.SystemName;
}
return _useArnRegion.Value;
}
}
set
{
lock (_useArnRegionLock)
{
_useArnRegion = value;
}
}
}
}
}