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sdk.class.php
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sdk.class.php
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<?php
/*
* Copyright 2010-2012 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.
*/
/*%******************************************************************************************%*/
// EXCEPTIONS
/**
* Default CFRuntime Exception.
*/
class CFRuntime_Exception extends Exception {}
/**
* Parsing Exception.
*/
class Parser_Exception extends Exception {}
/*%******************************************************************************************%*/
// DETERMINE WHAT ENVIRONMENT DATA TO ADD TO THE USERAGENT FOR METRIC TRACKING
/*
Define a temporary callback function for this calculation. Get the PHP version and any
required/optional extensions that are leveraged.
Tracking this data gives Amazon better metrics about what configurations are being used
so that forward-looking plans for the code can be made with more certainty (e.g. What
version of PHP are most people running? Do they tend to have the latest PCRE?).
*/
function __aws_sdk_ua_callback()
{
$ua_append = '';
$extensions = get_loaded_extensions();
$sorted_extensions = array();
if ($extensions)
{
foreach ($extensions as $extension)
{
if ($extension === 'curl' && function_exists('curl_version'))
{
$curl_version = curl_version();
$sorted_extensions[strtolower($extension)] = $curl_version['version'];
}
elseif ($extension === 'pcre' && defined('PCRE_VERSION'))
{
$pcre_version = explode(' ', PCRE_VERSION);
$sorted_extensions[strtolower($extension)] = $pcre_version[0];
}
elseif ($extension === 'openssl' && defined('OPENSSL_VERSION_TEXT'))
{
$openssl_version = explode(' ', OPENSSL_VERSION_TEXT);
$sorted_extensions[strtolower($extension)] = $openssl_version[1];
}
else
{
$sorted_extensions[strtolower($extension)] = phpversion($extension);
}
}
}
foreach (array('simplexml', 'json', 'pcre', 'spl', 'curl', 'openssl', 'apc', 'xcache', 'memcache', 'memcached', 'pdo', 'pdo_sqlite', 'sqlite', 'sqlite3', 'zlib', 'xdebug') as $ua_ext)
{
if (isset($sorted_extensions[$ua_ext]) && $sorted_extensions[$ua_ext])
{
$ua_append .= ' ' . $ua_ext . '/' . $sorted_extensions[$ua_ext];
}
elseif (isset($sorted_extensions[$ua_ext]))
{
$ua_append .= ' ' . $ua_ext . '/0';
}
}
foreach (array('memory_limit', 'date.timezone', 'open_basedir', 'safe_mode', 'zend.enable_gc') as $cfg)
{
$cfg_value = ini_get($cfg);
if (in_array($cfg, array('memory_limit', 'date.timezone'), true))
{
$ua_append .= ' ' . $cfg . '/' . str_replace('/', '.', $cfg_value);
}
elseif (in_array($cfg, array('open_basedir', 'safe_mode', 'zend.enable_gc'), true))
{
if ($cfg_value === false || $cfg_value === '' || $cfg_value === 0)
{
$cfg_value = 'off';
}
elseif ($cfg_value === true || $cfg_value === '1' || $cfg_value === 1)
{
$cfg_value = 'on';
}
$ua_append .= ' ' . $cfg . '/' . $cfg_value;
}
}
return $ua_append;
}
/*%******************************************************************************************%*/
// INTERMEDIARY CONSTANTS
define('CFRUNTIME_NAME', 'aws-sdk-php');
define('CFRUNTIME_VERSION', '1.5.14');
define('CFRUNTIME_BUILD', '20120831150000');
define('CFRUNTIME_USERAGENT', CFRUNTIME_NAME . '/' . CFRUNTIME_VERSION . ' PHP/' . PHP_VERSION . ' ' . str_replace(' ', '_', php_uname('s')) . '/' . str_replace(' ', '_', php_uname('r')) . ' Arch/' . php_uname('m') . ' SAPI/' . php_sapi_name() . ' Integer/' . PHP_INT_MAX . ' Build/' . CFRUNTIME_BUILD . __aws_sdk_ua_callback());
/*%******************************************************************************************%*/
// CLASS
/**
* Core functionality and default settings shared across all SDK classes. All methods and properties in this
* class are inherited by the service-specific classes.
*
* @version 2012.05.25
* @license See the included NOTICE.md file for more information.
* @copyright See the included NOTICE.md file for more information.
* @link http://aws.amazon.com/php/ PHP Developer Center
*/
class CFRuntime
{
/*%******************************************************************************************%*/
// CONSTANTS
/**
* Name of the software.
*/
const NAME = CFRUNTIME_NAME;
/**
* Version of the software.
*/
const VERSION = CFRUNTIME_VERSION;
/**
* Build ID of the software.
*/
const BUILD = CFRUNTIME_BUILD;
/**
* User agent string used to identify the software.
*/
const USERAGENT = CFRUNTIME_USERAGENT;
/*%******************************************************************************************%*/
// PROPERTIES
/**
* The Amazon API Key.
*/
public $key;
/**
* The Amazon API Secret Key.
*/
public $secret_key;
/**
* The Amazon Authentication Token.
*/
public $auth_token;
/**
* Handle for the utility functions.
*/
public $util;
/**
* An identifier for the current AWS service.
*/
public $service = null;
/**
* The supported API version.
*/
public $api_version = null;
/**
* The state of whether auth should be handled as AWS Query.
*/
public $use_aws_query = true;
/**
* The default class to use for utilities (defaults to <CFUtilities>).
*/
public $utilities_class = 'CFUtilities';
/**
* The default class to use for HTTP requests (defaults to <CFRequest>).
*/
public $request_class = 'CFRequest';
/**
* The default class to use for HTTP responses (defaults to <CFResponse>).
*/
public $response_class = 'CFResponse';
/**
* The default class to use for parsing XML (defaults to <CFSimpleXML>).
*/
public $parser_class = 'CFSimpleXML';
/**
* The default class to use for handling batch requests (defaults to <CFBatchRequest>).
*/
public $batch_class = 'CFBatchRequest';
/**
* The state of SSL/HTTPS use.
*/
public $use_ssl = true;
/**
* The state of SSL certificate verification.
*/
public $ssl_verification = true;
/**
* The proxy to use for connecting.
*/
public $proxy = null;
/**
* The alternate hostname to use, if any.
*/
public $hostname = null;
/**
* The state of the capability to override the hostname with <set_hostname()>.
*/
public $override_hostname = true;
/**
* The alternate port number to use, if any.
*/
public $port_number = null;
/**
* The alternate resource prefix to use, if any.
*/
public $resource_prefix = null;
/**
* The state of cache flow usage.
*/
public $use_cache_flow = false;
/**
* The caching class to use.
*/
public $cache_class = null;
/**
* The caching location to use.
*/
public $cache_location = null;
/**
* When the cache should be considered stale.
*/
public $cache_expires = null;
/**
* The state of cache compression.
*/
public $cache_compress = null;
/**
* The current instantiated cache object.
*/
public $cache_object = null;
/**
* The current instantiated batch request object.
*/
public $batch_object = null;
/**
* The internally instantiated batch request object.
*/
public $internal_batch_object = null;
/**
* The state of batch flow usage.
*/
public $use_batch_flow = false;
/**
* The state of the cache deletion setting.
*/
public $delete_cache = false;
/**
* The state of the debug mode setting.
*/
public $debug_mode = false;
/**
* The number of times to retry failed requests.
*/
public $max_retries = 3;
/**
* The user-defined callback function to call when a stream is read from.
*/
public $registered_streaming_read_callback = null;
/**
* The user-defined callback function to call when a stream is written to.
*/
public $registered_streaming_write_callback = null;
/**
* The credentials to use for authentication.
*/
public $credentials = array();
/**
* The authentication class to use.
*/
public $auth_class = null;
/**
* The operation to execute.
*/
public $operation = null;
/**
* The payload to send.
*/
public $payload = array();
/**
* The string prefix to prepend to the operation name.
*/
public $operation_prefix = '';
/**
* The number of times a request has been retried.
*/
public $redirects = 0;
/**
* The state of whether the response should be parsed or not.
*/
public $parse_the_response = true;
/*%******************************************************************************************%*/
// CONSTRUCTOR
/**
* The constructor. This class should not be instantiated directly. Rather, a service-specific class
* should be instantiated.
*
* @param array $options (Optional) An associative array of parameters that can have the following keys: <ul>
* <li><code>certificate_authority</code> - <code>boolean</code> - Optional - Determines which Cerificate Authority file to use. A value of boolean <code>false</code> will use the Certificate Authority file available on the system. A value of boolean <code>true</code> will use the Certificate Authority provided by the SDK. Passing a file system path to a Certificate Authority file (chmodded to <code>0755</code>) will use that. Leave this set to <code>false</code> if you're not sure.</li>
* <li><code>credentials</code> - <code>string</code> - Optional - The name of the credential set to use for authentication.</li>
* <li><code>default_cache_config</code> - <code>string</code> - Optional - This option allows a preferred storage type to be configured for long-term caching. This can be changed later using the <set_cache_config()> method. Valid values are: <code>apc</code>, <code>xcache</code>, or a file system path such as <code>./cache</code> or <code>/tmp/cache/</code>.</li>
* <li><code>key</code> - <code>string</code> - Optional - Your AWS key, or a session key. If blank, the default credential set will be used.</li>
* <li><code>instance_profile_timeout</code> - <code>integer</code> - Optional - When retrieving IAM instance profile credentials, there is a hard connection timeout that defaults to 2 seconds to prevent unnecessary on non-EC2 systems. This setting allows you to change that timeout if needed.</li>
* <li><code>secret</code> - <code>string</code> - Optional - Your AWS secret key, or a session secret key. If blank, the default credential set will be used.</li>
* <li><code>token</code> - <code>string</code> - Optional - An AWS session token.</li>
* <li><code>use_instance_profile_credentials</code> - <code>boolean</code> - Optional - Forces the use of IAM Instance Profile credentials, even when regular credentials are provided.</li></ul>
* @return void
*/
public function __construct(array $options = array())
{
// Instantiate the utilities class.
$this->util = new $this->utilities_class();
// Determine the current service.
$this->service = get_class($this);
// Create credentials based on the options
$runtime_credentials = new CFCredential($options);
$credentials_provided = false;
// Retrieve a credential set from config.inc.php if it exists
if (isset($options['credentials']))
{
// Use a specific credential set and merge with the runtime credentials
$this->credentials = CFCredentials::get($options['credentials'])
->merge($runtime_credentials);
}
else
{
try
{
// Use the default credential set and merge with the runtime credentials
$this->credentials = CFCredentials::get(CFCredentials::DEFAULT_KEY)
->merge($runtime_credentials);
}
catch (CFCredentials_Exception $e)
{
// Only the runtime credentials were provided
$this->credentials = $runtime_credentials;
}
}
// Check if keys were actually provided
if (isset($this->credentials['key']) && isset($this->credentials['secret']))
{
$credentials_provided = true;
}
// Check for an instance profile credentials override
if (isset($this->credentials['use_instance_profile_credentials']) && $this->credentials['use_instance_profile_credentials'])
{
$credentials_provided = false;
}
// Automatically enable whichever caching mechanism is set to default.
$this->set_cache_config($this->credentials->default_cache_config);
// If no credentials were provided, try to get them from the EC2 instance profile
if (!$credentials_provided)
{
// Default caching mechanism is required
if (!$this->credentials->default_cache_config)
{
// @codeCoverageIgnoreStart
throw new CFCredentials_Exception('No credentials were provided. The SDK attempts to retrieve Instance '
. 'Profile credentials from the EC2 Instance Metadata Service, but doing this requires the '
. '"default_cache_config" option to be set in the config.inc.php file or constructor. In order to '
. 'cache the retrieved credentials.');
// @codeCoverageIgnoreEnd
}
// Instantiate and invoke the cache for instance profile credentials
$cache = new $this->cache_class('instance_profile_credentials', $this->cache_location, 0, $this->cache_compress);
if ($data = $cache->read())
{
$cache->expire_in((strtotime($data['expires']) - time()) * 0.85);
}
$instance_profile_credentials = $cache->response_manager(array($this, 'cache_instance_profile_credentials'), array($cache, $options));
$this->credentials->key = $instance_profile_credentials['key'];
$this->credentials->secret = $instance_profile_credentials['secret'];
$this->credentials->token = $instance_profile_credentials['token'];
}
// Set internal credentials after they are resolved
$this->key = $this->credentials->key;
$this->secret_key = $this->credentials->secret;
$this->auth_token = $this->credentials->token;
}
/**
* Alternate approach to constructing a new instance. Supports chaining.
*
* @param array $options (Optional) An associative array of parameters that can have the following keys: <ul>
* <li><code>certificate_authority</code> - <code>boolean</code> - Optional - Determines which Cerificate Authority file to use. A value of boolean <code>false</code> will use the Certificate Authority file available on the system. A value of boolean <code>true</code> will use the Certificate Authority provided by the SDK. Passing a file system path to a Certificate Authority file (chmodded to <code>0755</code>) will use that. Leave this set to <code>false</code> if you're not sure.</li>
* <li><code>credentials</code> - <code>string</code> - Optional - The name of the credential set to use for authentication.</li>
* <li><code>default_cache_config</code> - <code>string</code> - Optional - This option allows a preferred storage type to be configured for long-term caching. This can be changed later using the <set_cache_config()> method. Valid values are: <code>apc</code>, <code>xcache</code>, or a file system path such as <code>./cache</code> or <code>/tmp/cache/</code>.</li>
* <li><code>key</code> - <code>string</code> - Optional - Your AWS key, or a session key. If blank, the default credential set will be used.</li>
* <li><code>secret</code> - <code>string</code> - Optional - Your AWS secret key, or a session secret key. If blank, the default credential set will be used.</li>
* <li><code>token</code> - <code>string</code> - Optional - An AWS session token.</li></ul>
* @return void
*/
public static function factory(array $options = array())
{
if (version_compare(PHP_VERSION, '5.3.0', '<'))
{
throw new Exception('PHP 5.3 or newer is required to instantiate a new class with CLASS::factory().');
}
$self = get_called_class();
return new $self($options);
}
/*%******************************************************************************************%*/
// MAGIC METHODS
/**
* A magic method that allows `camelCase` method names to be translated into `snake_case` names.
*
* @param string $name (Required) The name of the method.
* @param array $arguments (Required) The arguments passed to the method.
* @return mixed The results of the intended method.
*/
public function __call($name, $arguments)
{
// Convert camelCase method calls to snake_case.
$method_name = strtolower(preg_replace('/([a-z])([A-Z])/', '$1_$2', $name));
if (method_exists($this, $method_name))
{
return call_user_func_array(array($this, $method_name), $arguments);
}
throw new CFRuntime_Exception('The method ' . $name . '() is undefined. Attempted to map to ' . $method_name . '() which is also undefined. Error occurred');
}
/*%******************************************************************************************%*/
// SET CUSTOM SETTINGS
/**
* Set the proxy settings to use.
*
* @param string $proxy (Required) Accepts proxy credentials in the following format: `proxy://user:pass@hostname:port`
* @return $this A reference to the current instance.
*/
public function set_proxy($proxy)
{
$this->proxy = $proxy;
return $this;
}
/**
* Set the hostname to connect to. This is useful for alternate services that are API-compatible with
* AWS, but run from a different hostname.
*
* @param string $hostname (Required) The alternate hostname to use in place of the default one. Useful for mock or test applications living on different hostnames.
* @param integer $port_number (Optional) The alternate port number to use in place of the default one. Useful for mock or test applications living on different port numbers.
* @return $this A reference to the current instance.
*/
public function set_hostname($hostname, $port_number = null)
{
if ($this->override_hostname)
{
$this->hostname = $hostname;
if ($port_number)
{
$this->port_number = $port_number;
$this->hostname .= ':' . (string) $this->port_number;
}
}
return $this;
}
/**
* Set the resource prefix to use. This method is useful for alternate services that are API-compatible
* with AWS.
*
* @param string $prefix (Required) An alternate prefix to prepend to the resource path. Useful for mock or test applications.
* @return $this A reference to the current instance.
*/
public function set_resource_prefix($prefix)
{
$this->resource_prefix = $prefix;
return $this;
}
/**
* Disables any subsequent use of the <set_hostname()> method.
*
* @param boolean $override (Optional) Whether or not subsequent calls to <set_hostname()> should be obeyed. A `false` value disables the further effectiveness of <set_hostname()>. Defaults to `true`.
* @return $this A reference to the current instance.
*/
public function allow_hostname_override($override = true)
{
$this->override_hostname = $override;
return $this;
}
/**
* Disables SSL/HTTPS connections for hosts that don't support them. Some services, however, still
* require SSL support.
*
* This method will throw a user warning when invoked, which can be hidden by changing your
* <php:error_reporting()> settings.
*
* @return $this A reference to the current instance.
*/
public function disable_ssl()
{
trigger_error('Disabling SSL connections is potentially unsafe and highly discouraged.', E_USER_WARNING);
$this->use_ssl = false;
return $this;
}
/**
* Disables the verification of the SSL Certificate Authority. Doing so can enable an attacker to carry
* out a man-in-the-middle attack.
*
* https://secure.wikimedia.org/wikipedia/en/wiki/Man-in-the-middle_attack
*
* This method will throw a user warning when invoked, which can be hidden by changing your
* <php:error_reporting()> settings.
*
* @return $this A reference to the current instance.
*/
public function disable_ssl_verification($ssl_verification = false)
{
trigger_error('Disabling the verification of SSL certificates can lead to man-in-the-middle attacks. It is potentially unsafe and highly discouraged.', E_USER_WARNING);
$this->ssl_verification = $ssl_verification;
return $this;
}
/**
* Enables HTTP request/response header logging to `STDERR`.
*
* @param boolean $enabled (Optional) Whether or not to enable debug mode. Defaults to `true`.
* @return $this A reference to the current instance.
*/
public function enable_debug_mode($enabled = true)
{
$this->debug_mode = $enabled;
return $this;
}
/**
* Sets the maximum number of times to retry failed requests.
*
* @param integer $retries (Optional) The maximum number of times to retry failed requests. Defaults to `3`.
* @return $this A reference to the current instance.
*/
public function set_max_retries($retries = 3)
{
$this->max_retries = $retries;
return $this;
}
/**
* Set the caching configuration to use for response caching.
*
* @param string $location (Required) <p>The location to store the cache object in. This may vary by cache method.</p><ul><li>File - The local file system paths such as <code>./cache</code> (relative) or <code>/tmp/cache/</code> (absolute). The location must be server-writable.</li><li>APC - Pass in <code>apc</code> to use this lightweight cache. You must have the <a href="http://php.net/apc">APC extension</a> installed.</li><li>XCache - Pass in <code>xcache</code> to use this lightweight cache. You must have the <a href="http://xcache.lighttpd.net">XCache</a> extension installed.</li><li>Memcached - Pass in an indexed array of associative arrays. Each associative array should have a <code>host</code> and a <code>port</code> value representing a <a href="http://php.net/memcached">Memcached</a> server to connect to.</li><li>PDO - A URL-style string (e.g. <code>pdo.mysql://user:pass@localhost/cache</code>) or a standard DSN-style string (e.g. <code>pdo.sqlite:/sqlite/cache.db</code>). MUST be prefixed with <code>pdo.</code>. See <code>CachePDO</code> and <a href="http://php.net/pdo">PDO</a> for more details.</li></ul>
* @param boolean $gzip (Optional) Whether or not data should be gzipped before being stored. A value of `true` will compress the contents before caching them. A value of `false` will leave the contents uncompressed. Defaults to `true`.
* @return $this A reference to the current instance.
*/
public function set_cache_config($location, $gzip = true)
{
// If location is empty, don't do anything.
if (empty($location))
{
return $this;
}
// If we have an array, we're probably passing in Memcached servers and ports.
if (is_array($location))
{
$this->cache_class = 'CacheMC';
}
else
{
// I would expect locations like `/tmp/cache`, `pdo.mysql://user:pass@hostname:port`, `pdo.sqlite:memory:`, and `apc`.
$type = strtolower(substr($location, 0, 3));
switch ($type)
{
case 'apc':
$this->cache_class = 'CacheAPC';
break;
case 'xca': // First three letters of `xcache`
$this->cache_class = 'CacheXCache';
break;
case 'pdo':
$this->cache_class = 'CachePDO';
$location = substr($location, 4);
break;
default:
$this->cache_class = 'CacheFile';
break;
}
}
// Set the remaining cache information.
$this->cache_location = $location;
$this->cache_compress = $gzip;
return $this;
}
/**
* Register a callback function to execute whenever a data stream is read from using
* <CFRequest::streaming_read_callback()>.
*
* The user-defined callback function should accept three arguments:
*
* <ul>
* <li><code>$curl_handle</code> - <code>resource</code> - Required - The cURL handle resource that represents the in-progress transfer.</li>
* <li><code>$file_handle</code> - <code>resource</code> - Required - The file handle resource that represents the file on the local file system.</li>
* <li><code>$length</code> - <code>integer</code> - Required - The length in kilobytes of the data chunk that was transferred.</li>
* </ul>
*
* @param string|array|function $callback (Required) The callback function is called by <php:call_user_func()>, so you can pass the following values: <ul>
* <li>The name of a global function to execute, passed as a string.</li>
* <li>A method to execute, passed as <code>array('ClassName', 'MethodName')</code>.</li>
* <li>An anonymous function (PHP 5.3+).</li></ul>
* @return $this A reference to the current instance.
*/
public function register_streaming_read_callback($callback)
{
$this->registered_streaming_read_callback = $callback;
return $this;
}
/**
* Register a callback function to execute whenever a data stream is written to using
* <CFRequest::streaming_write_callback()>.
*
* The user-defined callback function should accept two arguments:
*
* <ul>
* <li><code>$curl_handle</code> - <code>resource</code> - Required - The cURL handle resource that represents the in-progress transfer.</li>
* <li><code>$length</code> - <code>integer</code> - Required - The length in kilobytes of the data chunk that was transferred.</li>
* </ul>
*
* @param string|array|function $callback (Required) The callback function is called by <php:call_user_func()>, so you can pass the following values: <ul>
* <li>The name of a global function to execute, passed as a string.</li>
* <li>A method to execute, passed as <code>array('ClassName', 'MethodName')</code>.</li>
* <li>An anonymous function (PHP 5.3+).</li></ul>
* @return $this A reference to the current instance.
*/
public function register_streaming_write_callback($callback)
{
$this->registered_streaming_write_callback = $callback;
return $this;
}
/**
* Fetches and caches STS credentials. This is meant to be used by the constructor, and is not to be
* manually invoked.
*
* @param CacheCore $cache (Required) The a reference to the cache object that is being used to handle the caching.
* @param array $options (Required) The options that were passed into the constructor.
* @return mixed The data to be cached, or NULL.
*/
public function cache_sts_credentials($cache, $options)
{
$token = new AmazonSTS($options);
$response = $token->get_session_token();
if ($response->isOK())
{
// Update the expiration
$expiration_time = strtotime((string) $response->body->GetSessionTokenResult->Credentials->Expiration);
$expiration_duration = round(($expiration_time - time()) * 0.85);
$cache->expire_in($expiration_duration);
// Return the important data
$credentials = $response->body->GetSessionTokenResult->Credentials;
return array(
'key' => (string) $credentials->AccessKeyId,
'secret' => (string) $credentials->SecretAccessKey,
'token' => (string) $credentials->SessionToken,
'expires' => (string) $credentials->Expiration,
);
}
// @codeCoverageIgnoreStart
throw new STS_Exception('Temporary credentials from the AWS Security '
. 'Token Service could not be retrieved using the provided long '
. 'term credentials. It\'s possible that the provided long term '
. 'credentials were invalid.');
// @codeCoverageIgnoreEnd
}
/**
* Fetches and caches EC2 instance profile credentials. This is meant to be used by the constructor, and is not to
* be manually invoked.
*
* @param CacheCore $cache (Required) The a reference to the cache object that is being used to handle the caching.
* @param array $options (Required) The options that were passed into the constructor.
* @return mixed The data to be cached, or NULL.
*/
public function cache_instance_profile_credentials($cache, $options)
{
$instance_profile_url = 'http://169.254.169.254/latest/meta-data/iam/security-credentials/';
$connect_timeout = isset($options['instance_profile_timeout']) ? $options['instance_profile_timeout'] : 2;
try
{
// Make a call to the EC2 Metadata Service to find the available instance profile
$request = new RequestCore($instance_profile_url);
$request->set_curlopts(array(CURLOPT_CONNECTTIMEOUT => $connect_timeout));
$response = $request->send_request(true);
if ($response->isOK())
{
// Get the instance profile name
$profile = (string) $response->body;
// Make a call to the EC2 Metadata Service to get the instance profile credentials
$request = new RequestCore($instance_profile_url . $profile);
$request->set_curlopts(array(CURLOPT_CONNECTTIMEOUT => $connect_timeout));
$response = $request->send_request(true);
if ($response->isOK())
{
// Get the credentials
$credentials = json_decode($response->body, true);
if ($credentials['Code'] === 'Success')
{
// Determine the expiration time
$expiration_time = strtotime((string) $credentials['Expiration']);
$expiration_duration = round(($expiration_time - time()) * 0.85);
$cache->expire_in($expiration_duration);
// Return the credential information
return array(
'key' => $credentials['AccessKeyId'],
'secret' => $credentials['SecretAccessKey'],
'token' => $credentials['Token'],
'expires' => $credentials['Expiration'],
);
}
}
}
}
catch (cURL_Exception $e)
{
// The EC2 Metadata Service does not exist or had timed out.
// An exception will be thrown on the next line.
}
// @codeCoverageIgnoreStart
throw new CFCredentials_Exception('No credentials were provided. The SDK attempted to retrieve Instance '
. 'Profile credentials from the EC2 Instance Metadata Service, but failed to do so. Instance profile '
. 'credentials are only accessible on EC2 instances configured with a specific IAM role.');
// @codeCoverageIgnoreEnd
}
/*%******************************************************************************************%*/
// SET CUSTOM CLASSES
/**
* Set a custom class for this functionality. Use this method when extending/overriding existing classes
* with new functionality.
*
* The replacement class must extend from <CFUtilities>.
*
* @param string $class (Optional) The name of the new class to use for this functionality.
* @return $this A reference to the current instance.
*/
public function set_utilities_class($class = 'CFUtilities')
{
$this->utilities_class = $class;
$this->util = new $this->utilities_class();
return $this;
}
/**
* Set a custom class for this functionality. Use this method when extending/overriding existing classes
* with new functionality.
*
* The replacement class must extend from <CFRequest>.
*
* @param string $class (Optional) The name of the new class to use for this functionality.
* @param $this A reference to the current instance.
*/
public function set_request_class($class = 'CFRequest')
{
$this->request_class = $class;
return $this;
}
/**
* Set a custom class for this functionality. Use this method when extending/overriding existing classes
* with new functionality.
*
* The replacement class must extend from <CFResponse>.
*
* @param string $class (Optional) The name of the new class to use for this functionality.
* @return $this A reference to the current instance.
*/
public function set_response_class($class = 'CFResponse')
{
$this->response_class = $class;
return $this;
}
/**
* Set a custom class for this functionality. Use this method when extending/overriding existing classes
* with new functionality.
*
* The replacement class must extend from <CFSimpleXML>.
*
* @param string $class (Optional) The name of the new class to use for this functionality.
* @return $this A reference to the current instance.
*/
public function set_parser_class($class = 'CFSimpleXML')
{
$this->parser_class = $class;
return $this;
}
/**
* Set a custom class for this functionality. Use this method when extending/overriding existing classes
* with new functionality.
*
* The replacement class must extend from <CFBatchRequest>.
*
* @param string $class (Optional) The name of the new class to use for this functionality.
* @return $this A reference to the current instance.
*/
public function set_batch_class($class = 'CFBatchRequest')
{
$this->batch_class = $class;
return $this;
}
/*%******************************************************************************************%*/
// AUTHENTICATION
/**
* Default, shared method for authenticating a connection to AWS.
*
* @param string $operation (Required) Indicates the operation to perform.
* @param array $payload (Required) An associative array of parameters for authenticating. See the individual methods for allowed keys.
* @return CFResponse Object containing a parsed HTTP response.
*/
public function authenticate($operation, $payload)
{
$original_payload = $payload;
$method_arguments = func_get_args();
$curlopts = array();
$return_curl_handle = false;
if (substr($operation, 0, strlen($this->operation_prefix)) !== $this->operation_prefix)
{
$operation = $this->operation_prefix . $operation;
}
// Extract the custom CURLOPT settings from the payload
if (is_array($payload) && isset($payload['curlopts']))
{
$curlopts = $payload['curlopts'];
unset($payload['curlopts']);
}
// Determine whether the response or curl handle should be returned
if (is_array($payload) && isset($payload['returnCurlHandle']))
{
$return_curl_handle = isset($payload['returnCurlHandle']) ? $payload['returnCurlHandle'] : false;
unset($payload['returnCurlHandle']);
}
// Use the caching flow to determine if we need to do a round-trip to the server.
if ($this->use_cache_flow)
{
// Generate an identifier specific to this particular set of arguments.
$cache_id = $this->key . '_' . get_class($this) . '_' . $operation . '_' . sha1(serialize($method_arguments));
// Instantiate the appropriate caching object.
$this->cache_object = new $this->cache_class($cache_id, $this->cache_location, $this->cache_expires, $this->cache_compress);
if ($this->delete_cache)
{
$this->use_cache_flow = false;
$this->delete_cache = false;
return $this->cache_object->delete();
}
// Invoke the cache callback function to determine whether to pull data from the cache or make a fresh request.
$data = $this->cache_object->response_manager(array($this, 'cache_callback'), $method_arguments);
// Parse the XML body
$data = $this->parse_callback($data);
// End!
return $data;
}
/*%******************************************************************************************%*/
// Signer
$signer = new $this->auth_class($this->hostname, $operation, $payload, $this->credentials);
$signer->key = $this->key;
$signer->secret_key = $this->secret_key;
$signer->auth_token = $this->auth_token;
$signer->api_version = $this->api_version;
$signer->utilities_class = $this->utilities_class;
$signer->request_class = $this->request_class;
$signer->response_class = $this->response_class;
$signer->use_ssl = $this->use_ssl;
$signer->proxy = $this->proxy;
$signer->util = $this->util;
$signer->registered_streaming_read_callback = $this->registered_streaming_read_callback;
$signer->registered_streaming_write_callback = $this->registered_streaming_write_callback;
$request = $signer->authenticate();
// Update RequestCore settings