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<?php
/**
* Copyright 2010-2013 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.
*/
namespace Aws\S3;
use Aws\Common\Signature\SignatureV4;
use Aws\Common\Credentials\CredentialsInterface;
use Guzzle\Http\Message\EntityEnclosingRequestInterface;
use Guzzle\Http\Message\RequestInterface;
/**
* Amazon S3 signature version 4 overrides.
*/
class S3SignatureV4 extends SignatureV4 implements S3SignatureInterface
{
/**
* Always add a x-amz-content-sha-256 for data integrity.
*/
public function signRequest(RequestInterface $request, CredentialsInterface $credentials)
{
if (!$request->hasHeader('x-amz-content-sha256')) {
$request->setHeader(
'x-amz-content-sha256',
$this->getPayload($request)
);
}
parent::signRequest($request, $credentials);
}
/**
* Override used to allow pre-signed URLs to be created for an
* in-determinate request payload.
*/
protected function getPresignedPayload(RequestInterface $request)
{
return 'UNSIGNED-PAYLOAD';
}
/**
* Amazon S3 does not double-encode the path component in the canonical req
*/
protected function createCanonicalizedPath(RequestInterface $request)
{
return '/' . ltrim($request->getPath(), '/');
}
}