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<?php
namespace Aws;
use Aws\Api\ApiProvider;
use Aws\Api\DocModel;
use Aws\Api\Service;
use Aws\Auth\AuthSelectionMiddleware;
use Aws\Auth\AuthSchemeResolverInterface;
use Aws\EndpointDiscovery\EndpointDiscoveryMiddleware;
use Aws\EndpointV2\EndpointProviderV2;
use Aws\EndpointV2\EndpointV2Middleware;
use Aws\Exception\AwsException;
use Aws\Signature\SignatureProvider;
use GuzzleHttp\Psr7\Uri;
/**
* Default AWS client implementation
*/
class AwsClient implements AwsClientInterface
{
use AwsClientTrait;
/** @var array */
private $aliases;
/** @var array */
private $config;
/** @var string */
private $region;
/** @var string */
private $signingRegionSet;
/** @var string */
private $endpoint;
/** @var Service */
private $api;
/** @var callable */
private $signatureProvider;
/** @var AuthSchemeResolverInterface */
private $authSchemeResolver;
/** @var callable */
private $credentialProvider;
/** @var callable */
private $tokenProvider;
/** @var HandlerList */
private $handlerList;
/** @var array*/
private $defaultRequestOptions;
/** @var array*/
private $clientContextParams = [];
/** @var array*/
protected $clientBuiltIns = [];
/** @var EndpointProviderV2 | callable */
protected $endpointProvider;
/** @var callable */
protected $serializer;
/**
* Get an array of client constructor arguments used by the client.
*
* @return array
*/
public static function getArguments()
{
return ClientResolver::getDefaultArguments();
}
/**
* The client constructor accepts the following options:
*
* - api_provider: (callable) An optional PHP callable that accepts a
* type, service, and version argument, and returns an array of
* corresponding configuration data. The type value can be one of api,
* waiter, or paginator.
* - credentials:
* (Aws\Credentials\CredentialsInterface|array|bool|callable) Specifies
* the credentials used to sign requests. Provide an
* Aws\Credentials\CredentialsInterface object, an associative array of
* "key", "secret", and an optional "token" key, `false` to use null
* credentials, or a callable credentials provider used to create
* credentials or return null. See Aws\Credentials\CredentialProvider for
* a list of built-in credentials providers. If no credentials are
* provided, the SDK will attempt to load them from the environment.
* - token:
* (Aws\Token\TokenInterface|array|bool|callable) Specifies
* the token used to authorize requests. Provide an
* Aws\Token\TokenInterface object, an associative array of
* "token" and an optional "expires" key, `false` to use no
* token, or a callable token provider used to create a
* token or return null. See Aws\Token\TokenProvider for
* a list of built-in token providers. If no token is
* provided, the SDK will attempt to load one from the environment.
* - csm:
* (Aws\ClientSideMonitoring\ConfigurationInterface|array|callable) Specifies
* the credentials used to sign requests. Provide an
* Aws\ClientSideMonitoring\ConfigurationInterface object, a callable
* configuration provider used to create client-side monitoring configuration,
* `false` to disable csm, or an associative array with the following keys:
* enabled: (bool) Set to true to enable client-side monitoring, defaults
* to false; host: (string) the host location to send monitoring events to,
* defaults to 127.0.0.1; port: (int) The port used for the host connection,
* defaults to 31000; client_id: (string) An identifier for this project
* - debug: (bool|array) Set to true to display debug information when
* sending requests. Alternatively, you can provide an associative array
* with the following keys: logfn: (callable) Function that is invoked
* with log messages; stream_size: (int) When the size of a stream is
* greater than this number, the stream data will not be logged (set to
* "0" to not log any stream data); scrub_auth: (bool) Set to false to
* disable the scrubbing of auth data from the logged messages; http:
* (bool) Set to false to disable the "debug" feature of lower level HTTP
* adapters (e.g., verbose curl output).
* - stats: (bool|array) Set to true to gather transfer statistics on
* requests sent. Alternatively, you can provide an associative array with
* the following keys: retries: (bool) Set to false to disable reporting
* on retries attempted; http: (bool) Set to true to enable collecting
* statistics from lower level HTTP adapters (e.g., values returned in
* GuzzleHttp\TransferStats). HTTP handlers must support an
* `http_stats_receiver` option for this to have an effect; timer: (bool)
* Set to true to enable a command timer that reports the total wall clock
* time spent on an operation in seconds.
* - disable_host_prefix_injection: (bool) Set to true to disable host prefix
* injection logic for services that use it. This disables the entire
* prefix injection, including the portions supplied by user-defined
* parameters. Setting this flag will have no effect on services that do
* not use host prefix injection.
* - endpoint: (string) The full URI of the webservice. This is only
* required when connecting to a custom endpoint (e.g., a local version
* of S3).
* - endpoint_discovery: (Aws\EndpointDiscovery\ConfigurationInterface,
* Aws\CacheInterface, array, callable) Settings for endpoint discovery.
* Provide an instance of Aws\EndpointDiscovery\ConfigurationInterface,
* an instance Aws\CacheInterface, a callable that provides a promise for
* a Configuration object, or an associative array with the following
* keys: enabled: (bool) Set to true to enable endpoint discovery, false
* to explicitly disable it, defaults to false; cache_limit: (int) The
* maximum number of keys in the endpoints cache, defaults to 1000.
* - endpoint_provider: (callable) An optional PHP callable that
* accepts a hash of options including a "service" and "region" key and
* returns NULL or a hash of endpoint data, of which the "endpoint" key
* is required. See Aws\Endpoint\EndpointProvider for a list of built-in
* providers.
* - handler: (callable) A handler that accepts a command object,
* request object and returns a promise that is fulfilled with an
* Aws\ResultInterface object or rejected with an
* Aws\Exception\AwsException. A handler does not accept a next handler
* as it is terminal and expected to fulfill a command. If no handler is
* provided, a default Guzzle handler will be utilized.
* - http: (array, default=array(0)) Set to an array of SDK request
* options to apply to each request (e.g., proxy, verify, etc.).
* - http_handler: (callable) An HTTP handler is a function that
* accepts a PSR-7 request object and returns a promise that is fulfilled
* with a PSR-7 response object or rejected with an array of exception
* data. NOTE: This option supersedes any provided "handler" option.
* - idempotency_auto_fill: (bool|callable) Set to false to disable SDK to
* populate parameters that enabled 'idempotencyToken' trait with a random
* UUID v4 value on your behalf. Using default value 'true' still allows
* parameter value to be overwritten when provided. Note: auto-fill only
* works when cryptographically secure random bytes generator functions
* (random_bytes, openssl_random_pseudo_bytes or mcrypt_create_iv) can be
* found. You may also provide a callable source of random bytes.
* - profile: (string) Allows you to specify which profile to use when
* credentials are created from the AWS credentials file in your HOME
* directory. This setting overrides the AWS_PROFILE environment
* variable. Note: Specifying "profile" will cause the "credentials" key
* to be ignored.
* - region: (string, required) Region to connect to. See
* http://docs.aws.amazon.com/general/latest/gr/rande.html for a list of
* available regions.
* - retries: (int, Aws\Retry\ConfigurationInterface, Aws\CacheInterface,
* array, callable) Configures the retry mode and maximum number of
* allowed retries for a client (pass 0 to disable retries). Provide an
* integer for 'legacy' mode with the specified number of retries.
* Otherwise provide an instance of Aws\Retry\ConfigurationInterface, an
* instance of Aws\CacheInterface, a callable function, or an array with
* the following keys: mode: (string) Set to 'legacy', 'standard' (uses
* retry quota management), or 'adapative' (an experimental mode that adds
* client-side rate limiting to standard mode); max_attempts (int) The
* maximum number of attempts for a given request.
* - scheme: (string, default=string(5) "https") URI scheme to use when
* connecting connect. The SDK will utilize "https" endpoints (i.e.,
* utilize SSL/TLS connections) by default. You can attempt to connect to
* a service over an unencrypted "http" endpoint by setting ``scheme`` to
* "http".
* - signature_provider: (callable) A callable that accepts a signature
* version name (e.g., "v4"), a service name, and region, and
* returns a SignatureInterface object or null. This provider is used to
* create signers utilized by the client. See
* Aws\Signature\SignatureProvider for a list of built-in providers
* - signature_version: (string) A string representing a custom
* signature version to use with a service (e.g., v4). Note that
* per/operation signature version MAY override this requested signature
* version.
* - use_aws_shared_config_files: (bool, default=bool(true)) Set to false to
* disable checking for shared config file in '~/.aws/config' and
* '~/.aws/credentials'. This will override the AWS_CONFIG_FILE
* environment variable.
* - validate: (bool, default=bool(true)) Set to false to disable
* client-side parameter validation.
* - version: (string, required) The version of the webservice to
* utilize (e.g., 2006-03-01).
* - account_id_endpoint_mode: (string, default(preferred)) this option
* decides whether credentials should resolve an accountId value,
* which is going to be used as part of the endpoint resolution.
* The valid values for this option are:
* - preferred: when this value is set then, a warning is logged when
* accountId is empty in the resolved identity.
* - required: when this value is set then, an exception is thrown when
* accountId is empty in the resolved identity.
* - disabled: when this value is set then, the validation for if accountId
* was resolved or not, is ignored.
* - ua_append: (string, array) To pass custom user agent parameters.
* - app_id: (string) an optional application specific identifier that can be set.
* When set it will be appended to the User-Agent header of every request
* in the form of App/{AppId}. This variable is sourced from environment
* variable AWS_SDK_UA_APP_ID or the shared config profile attribute sdk_ua_app_id.
* See https://docs.aws.amazon.com/sdkref/latest/guide/settings-reference.html for
* more information on environment variables and shared config settings.
*
* @param array $args Client configuration arguments.
*
* @throws \InvalidArgumentException if any required options are missing or
* the service is not supported.
*/
public function __construct(array $args)
{
list($service, $exceptionClass) = $this->parseClass();
if (!isset($args['service'])) {
$args['service'] = manifest($service)['endpoint'];
}
if (!isset($args['exception_class'])) {
$args['exception_class'] = $exceptionClass;
}
$this->handlerList = new HandlerList();
$resolver = new ClientResolver(static::getArguments());
$config = $resolver->resolve($args, $this->handlerList);
$this->api = $config['api'];
$this->signatureProvider = $config['signature_provider'];
$this->authSchemeResolver = $config['auth_scheme_resolver'];
$this->endpoint = new Uri($config['endpoint']);
$this->credentialProvider = $config['credentials'];
$this->tokenProvider = $config['token'];
$this->region = $config['region'] ?? null;
$this->signingRegionSet = $config['sigv4a_signing_region_set'] ?? null;
$this->config = $config['config'];
$this->setClientBuiltIns($args, $config);
$this->clientContextParams = $this->setClientContextParams($args);
$this->defaultRequestOptions = $config['http'];
$this->endpointProvider = $config['endpoint_provider'];
$this->serializer = $config['serializer'];
$this->addSignatureMiddleware($args);
$this->addInvocationId();
$this->addEndpointParameterMiddleware($args);
$this->addEndpointDiscoveryMiddleware($config, $args);
$this->addRequestCompressionMiddleware($config);
$this->loadAliases();
$this->addStreamRequestPayload();
$this->addRecursionDetection();
if ($this->isUseEndpointV2()) {
$this->addEndpointV2Middleware();
}
$this->addAuthSelectionMiddleware();
if (!is_null($this->api->getMetadata('awsQueryCompatible'))) {
$this->addQueryCompatibleInputMiddleware($this->api);
}
if (isset($args['with_resolved'])) {
$args['with_resolved']($config);
}
}
public function getHandlerList()
{
return $this->handlerList;
}
public function getConfig($option = null)
{
return $option === null
? $this->config
: $this->config[$option] ?? null;
}
public function getCredentials()
{
$fn = $this->credentialProvider;
return $fn();
}
public function getEndpoint()
{
return $this->endpoint;
}
public function getRegion()
{
return $this->region;
}
public function getApi()
{
return $this->api;
}
public function getCommand($name, array $args = [])
{
// Fail fast if the command cannot be found in the description.
if (!isset($this->getApi()['operations'][$name])) {
$name = ucfirst($name);
if (!isset($this->getApi()['operations'][$name])) {
throw new \InvalidArgumentException("Operation not found: $name");
}
}
if (!isset($args['@http'])) {
$args['@http'] = $this->defaultRequestOptions;
} else {
$args['@http'] += $this->defaultRequestOptions;
}
return new Command($name, $args, clone $this->getHandlerList());
}
public function getEndpointProvider()
{
return $this->endpointProvider;
}
/**
* Provides the set of service context parameter
* key-value pairs used for endpoint resolution.
*
* @return array
*/
public function getClientContextParams()
{
return $this->clientContextParams;
}
/**
* Provides the set of built-in keys and values
* used for endpoint resolution
*
* @return array
*/
public function getClientBuiltIns()
{
return $this->clientBuiltIns;
}
public function __sleep()
{
throw new \RuntimeException('Instances of ' . static::class
. ' cannot be serialized');
}
/**
* Get the signature_provider function of the client.
*
* @return callable
*/
final public function getSignatureProvider()
{
return $this->signatureProvider;
}
/**
* Parse the class name and setup the custom exception class of the client
* and return the "service" name of the client and "exception_class".
*
* @return array
*/
private function parseClass()
{
$klass = get_class($this);
if ($klass === __CLASS__) {
return ['', AwsException::class];
}
$service = substr($klass, strrpos($klass, '\\') + 1, -6);
return [
strtolower($service),
"Aws\\{$service}\\Exception\\{$service}Exception"
];
}
private function addEndpointParameterMiddleware($args)
{
if (empty($args['disable_host_prefix_injection'])) {
$list = $this->getHandlerList();
$list->appendBuild(
EndpointParameterMiddleware::wrap(
$this->api
),
'endpoint_parameter'
);
}
}
private function addEndpointDiscoveryMiddleware($config, $args)
{
$list = $this->getHandlerList();
if (!isset($args['endpoint'])) {
$list->appendBuild(
EndpointDiscoveryMiddleware::wrap(
$this,
$args,
$config['endpoint_discovery']
),
'EndpointDiscoveryMiddleware'
);
}
}
private function addSignatureMiddleware(array $args)
{
$api = $this->getApi();
$provider = $this->signatureProvider;
$signatureVersion = $this->config['signature_version'];
$name = $this->config['signing_name'];
$region = $this->config['signing_region'];
$signingRegionSet = $this->signingRegionSet;
if (isset($args['signature_version'])
|| isset($this->config['configured_signature_version'])
) {
$configuredSignatureVersion = true;
} else {
$configuredSignatureVersion = false;
}
$resolver = static function (
CommandInterface $c
) use (
$api,
$provider,
$name,
$region,
$signatureVersion,
$configuredSignatureVersion,
$signingRegionSet
) {
if (!$configuredSignatureVersion) {
if (!empty($c['@context']['signing_region'])) {
$region = $c['@context']['signing_region'];
}
if (!empty($c['@context']['signing_service'])) {
$name = $c['@context']['signing_service'];
}
if (!empty($c['@context']['signature_version'])) {
$signatureVersion = $c['@context']['signature_version'];
}
$authType = $api->getOperation($c->getName())['authtype'];
switch ($authType){
case 'none':
$signatureVersion = 'anonymous';
break;
case 'v4-unsigned-body':
$signatureVersion = 'v4-unsigned-body';
break;
case 'bearer':
$signatureVersion = 'bearer';
break;
}
}
if ($signatureVersion === 'v4a') {
$commandSigningRegionSet = !empty($c['@context']['signing_region_set'])
? implode(', ', $c['@context']['signing_region_set'])
: null;
$region = $signingRegionSet
?? $commandSigningRegionSet
?? $region;
}
return SignatureProvider::resolve($provider, $signatureVersion, $name, $region);
};
$this->handlerList->appendSign(
Middleware::signer($this->credentialProvider,
$resolver,
$this->tokenProvider,
$this->getConfig()
),
'signer'
);
}
private function addRequestCompressionMiddleware($config)
{
if (empty($config['disable_request_compression'])) {
$list = $this->getHandlerList();
$list->appendBuild(
RequestCompressionMiddleware::wrap($config),
'request-compression'
);
}
}
private function addQueryCompatibleInputMiddleware(Service $api)
{
$list = $this->getHandlerList();
$list->appendValidate(
QueryCompatibleInputMiddleware::wrap($api),
'query-compatible-input'
);
}
private function addInvocationId()
{
// Add invocation id to each request
$this->handlerList->prependSign(Middleware::invocationId(), 'invocation-id');
}
private function loadAliases($file = null)
{
if (!isset($this->aliases)) {
if (is_null($file)) {
$file = __DIR__ . '/data/aliases.json';
}
$aliases = \Aws\load_compiled_json($file);
$serviceId = $this->api->getServiceId();
$version = $this->getApi()->getApiVersion();
if (!empty($aliases['operations'][$serviceId][$version])) {
$this->aliases = array_flip($aliases['operations'][$serviceId][$version]);
}
}
}
private function addStreamRequestPayload()
{
$streamRequestPayloadMiddleware = StreamRequestPayloadMiddleware::wrap(
$this->api
);
$this->handlerList->prependSign(
$streamRequestPayloadMiddleware,
'StreamRequestPayloadMiddleware'
);
}
private function addRecursionDetection()
{
// Add recursion detection header to requests
// originating in supported Lambda runtimes
$this->handlerList->appendBuild(
Middleware::recursionDetection(), 'recursion-detection'
);
}
private function addAuthSelectionMiddleware()
{
$list = $this->getHandlerList();
$list->prependBuild(
AuthSelectionMiddleware::wrap(
$this->authSchemeResolver,
$this->getApi()
),
'auth-selection'
);
}
private function addEndpointV2Middleware()
{
$list = $this->getHandlerList();
$endpointArgs = $this->getEndpointProviderArgs();
$list->prependBuild(
EndpointV2Middleware::wrap(
$this->endpointProvider,
$this->getApi(),
$endpointArgs,
$this->credentialProvider
),
'endpoint-resolution'
);
}
/**
* Retrieves client context param definition from service model,
* creates mapping of client context param names with client-provided
* values.
*
* @return array
*/
private function setClientContextParams($args)
{
$api = $this->getApi();
$resolvedParams = [];
if (!empty($paramDefinitions = $api->getClientContextParams())) {
foreach($paramDefinitions as $paramName => $paramValue) {
if (isset($args[$paramName])) {
$resolvedParams[$paramName] = $args[$paramName];
}
}
}
return $resolvedParams;
}
/**
* Retrieves and sets default values used for endpoint resolution.
*/
private function setClientBuiltIns($args, $resolvedConfig)
{
$builtIns = [];
$config = $resolvedConfig['config'];
$service = $args['service'];
$builtIns['SDK::Endpoint'] = null;
if (!empty($args['endpoint'])) {
$builtIns['SDK::Endpoint'] = $args['endpoint'];
} elseif (isset($config['configured_endpoint_url'])) {
$builtIns['SDK::Endpoint'] = (string) $this->getEndpoint();
}
$builtIns['AWS::Region'] = $this->getRegion();
$builtIns['AWS::UseFIPS'] = $config['use_fips_endpoint']->isUseFipsEndpoint();
$builtIns['AWS::UseDualStack'] = $config['use_dual_stack_endpoint']->isUseDualstackEndpoint();
if ($service === 's3' || $service === 's3control'){
$builtIns['AWS::S3::UseArnRegion'] = $config['use_arn_region']->isUseArnRegion();
}
if ($service === 's3') {
$builtIns['AWS::S3::UseArnRegion'] = $config['use_arn_region']->isUseArnRegion();
$builtIns['AWS::S3::Accelerate'] = $config['use_accelerate_endpoint'];
$builtIns['AWS::S3::ForcePathStyle'] = $config['use_path_style_endpoint'];
$builtIns['AWS::S3::DisableMultiRegionAccessPoints'] = $config['disable_multiregion_access_points'];
}
$builtIns['AWS::Auth::AccountIdEndpointMode'] = $resolvedConfig['account_id_endpoint_mode'];
$this->clientBuiltIns += $builtIns;
}
/**
* Retrieves arguments to be used in endpoint resolution.
*
* @return array
*/
public function getEndpointProviderArgs()
{
return $this->normalizeEndpointProviderArgs();
}
/**
* Combines built-in and client context parameter values in
* order of specificity. Client context parameter values supersede
* built-in values.
*
* @return array
*/
private function normalizeEndpointProviderArgs()
{
$normalizedBuiltIns = [];
foreach($this->clientBuiltIns as $name => $value) {
$normalizedName = explode('::', $name);
$normalizedName = $normalizedName[count($normalizedName) - 1];
$normalizedBuiltIns[$normalizedName] = $value;
}
return array_merge($normalizedBuiltIns, $this->getClientContextParams());
}
protected function isUseEndpointV2()
{
return $this->endpointProvider instanceof EndpointProviderV2;
}
public static function emitDeprecationWarning() {
trigger_error(
"This method is deprecated. It will be removed in an upcoming release."
, E_USER_DEPRECATED
);
$phpVersion = PHP_VERSION_ID;
if ($phpVersion < 70205) {
$phpVersionString = phpversion();
@trigger_error(
"This installation of the SDK is using PHP version"
. " {$phpVersionString}, which will be deprecated on August"
. " 15th, 2023. Please upgrade your PHP version to a minimum of"
. " 7.2.5 before then to continue receiving updates to the AWS"
. " SDK for PHP. To disable this warning, set"
. " suppress_php_deprecation_warning to true on the client constructor"
. " or set the environment variable AWS_SUPPRESS_PHP_DEPRECATION_WARNING"
. " to true.",
E_USER_DEPRECATED
);
}
}
/**
* Returns a service model and doc model with any necessary changes
* applied.
*
* @param array $api Array of service data being documented.
* @param array $docs Array of doc model data.
*
* @return array Tuple containing a [Service, DocModel]
*
* @internal This should only used to document the service API.
* @codeCoverageIgnore
*/
public static function applyDocFilters(array $api, array $docs)
{
$aliases = \Aws\load_compiled_json(__DIR__ . '/data/aliases.json');
$serviceId = $api['metadata']['serviceId'] ?? '';
$version = $api['metadata']['apiVersion'];
// Replace names for any operations with SDK aliases
if (!empty($aliases['operations'][$serviceId][$version])) {
foreach ($aliases['operations'][$serviceId][$version] as $op => $alias) {
$api['operations'][$alias] = $api['operations'][$op];
$docs['operations'][$alias] = $docs['operations'][$op];
unset($api['operations'][$op], $docs['operations'][$op]);
}
}
ksort($api['operations']);
return [
new Service($api, ApiProvider::defaultProvider()),
new DocModel($docs)
];
}
/**
* @deprecated
* @return static
*/
public static function factory(array $config = [])
{
return new static($config);
}
}

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