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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\Common\InstanceMetadata;
use Aws\Common\Enum\ClientOptions as Options;
use Aws\Common\Exception\InstanceProfileCredentialsException;
use Aws\Common\Credentials\Credentials;
use Aws\Common\Client\AbstractClient;
use Guzzle\Common\Collection;
use Guzzle\Http\Message\RequestFactory;
/**
* Client used for interacting with the Amazon EC2 instance metadata server
*/
class InstanceMetadataClient extends AbstractClient
{
/**
* Factory method to create a new InstanceMetadataClient using an array
* of configuration options.
*
* The configuration options accepts the following array keys and values:
* - base_url: Override the base URL of the instance metadata server
* - version: Version of the metadata server to interact with
*
* @param array|Collection $config Configuration options
*
* @return InstanceMetadataClient
*/
public static function factory($config = array())
{
$config = Collection::fromConfig($config, array(
Options::BASE_URL => 'http://169.254.169.254/{version}/',
'version' => 'latest',
'request.options' => array(
'connect_timeout' => 5,
'timeout' => 10
)
), array('base_url', 'version'));
return new self($config);
}
/**
* Constructor override
*/
public function __construct(Collection $config)
{
$this->setConfig($config);
$this->setBaseUrl($config->get(Options::BASE_URL));
$this->defaultHeaders = new Collection();
$this->setRequestFactory(RequestFactory::getInstance());
}
/**
* Get instance profile credentials
*
* @return Credentials
* @throws InstanceProfileCredentialsException
*/
public function getInstanceProfileCredentials()
{
try {
$request = $this->get('meta-data/iam/security-credentials/');
$credentials = trim($request->send()->getBody(true));
$result = $this->get("meta-data/iam/security-credentials/{$credentials}")->send()->json();
} catch (\Exception $e) {
$message = sprintf('Error retrieving credentials from the instance profile metadata server. When you are'
. ' not running inside of Amazon EC2, you must provide your AWS access key ID and secret access key in'
. ' the "key" and "secret" options when creating a client or provide an instantiated'
. ' Aws\\Common\\Credentials\\CredentialsInterface object. (%s)', $e->getMessage());
throw new InstanceProfileCredentialsException($message, $e->getCode());
}
// Ensure that the status code was successful
if ($result['Code'] !== 'Success') {
$e = new InstanceProfileCredentialsException('Unexpected response code: ' . $result['Code']);
$e->setStatusCode($result['Code']);
throw $e;
}
return new Credentials(
$result['AccessKeyId'],
$result['SecretAccessKey'],
$result['Token'],
strtotime($result['Expiration'])
);
}
}
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