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<?php
namespace Aws\Sqs;
use Aws\AwsClient;
use Aws\CommandInterface;
use Aws\Sqs\Exception\SqsException;
use GuzzleHttp\Psr7\Uri;
use GuzzleHttp\Psr7\UriResolver;
use Psr\Http\Message\RequestInterface;
/**
* Client used to interact Amazon Simple Queue Service (Amazon SQS)
*
* @method \Aws\Result addPermission(array $args = [])
* @method \GuzzleHttp\Promise\Promise addPermissionAsync(array $args = [])
* @method \Aws\Result changeMessageVisibility(array $args = [])
* @method \GuzzleHttp\Promise\Promise changeMessageVisibilityAsync(array $args = [])
* @method \Aws\Result changeMessageVisibilityBatch(array $args = [])
* @method \GuzzleHttp\Promise\Promise changeMessageVisibilityBatchAsync(array $args = [])
* @method \Aws\Result createQueue(array $args = [])
* @method \GuzzleHttp\Promise\Promise createQueueAsync(array $args = [])
* @method \Aws\Result deleteMessage(array $args = [])
* @method \GuzzleHttp\Promise\Promise deleteMessageAsync(array $args = [])
* @method \Aws\Result deleteMessageBatch(array $args = [])
* @method \GuzzleHttp\Promise\Promise deleteMessageBatchAsync(array $args = [])
* @method \Aws\Result deleteQueue(array $args = [])
* @method \GuzzleHttp\Promise\Promise deleteQueueAsync(array $args = [])
* @method \Aws\Result getQueueAttributes(array $args = [])
* @method \GuzzleHttp\Promise\Promise getQueueAttributesAsync(array $args = [])
* @method \Aws\Result getQueueUrl(array $args = [])
* @method \GuzzleHttp\Promise\Promise getQueueUrlAsync(array $args = [])
* @method \Aws\Result listDeadLetterSourceQueues(array $args = [])
* @method \GuzzleHttp\Promise\Promise listDeadLetterSourceQueuesAsync(array $args = [])
* @method \Aws\Result listQueues(array $args = [])
* @method \GuzzleHttp\Promise\Promise listQueuesAsync(array $args = [])
* @method \Aws\Result purgeQueue(array $args = [])
* @method \GuzzleHttp\Promise\Promise purgeQueueAsync(array $args = [])
* @method \Aws\Result receiveMessage(array $args = [])
* @method \GuzzleHttp\Promise\Promise receiveMessageAsync(array $args = [])
* @method \Aws\Result removePermission(array $args = [])
* @method \GuzzleHttp\Promise\Promise removePermissionAsync(array $args = [])
* @method \Aws\Result sendMessage(array $args = [])
* @method \GuzzleHttp\Promise\Promise sendMessageAsync(array $args = [])
* @method \Aws\Result sendMessageBatch(array $args = [])
* @method \GuzzleHttp\Promise\Promise sendMessageBatchAsync(array $args = [])
* @method \Aws\Result setQueueAttributes(array $args = [])
* @method \GuzzleHttp\Promise\Promise setQueueAttributesAsync(array $args = [])
*/
class SqsClient extends AwsClient
{
public function __construct(array $config)
{
parent::__construct($config);
$list = $this->getHandlerList();
$list->appendBuild($this->queueUrl(), 'sqs.queue_url');
$list->appendSign($this->validateMd5(), 'sqs.md5');
}
/**
* Converts a queue URL into a queue ARN.
*
* @param string $queueUrl The queue URL to perform the action on.
* Retrieved when the queue is first created.
*
* @return string An ARN representation of the queue URL.
*/
public function getQueueArn($queueUrl)
{
$queueArn = strtr($queueUrl, array(
'http://' => 'arn:aws:',
'https://' => 'arn:aws:',
'.amazonaws.com' => '',
'/' => ':',
'.' => ':',
));
// Cope with SQS' .fifo / :fifo arn inconsistency
if (substr($queueArn, -5) === ':fifo') {
$queueArn = substr_replace($queueArn, '.fifo', -5);
}
return $queueArn;
}
/**
* Moves the URI of the queue to the URI in the input parameter.
*
* @return callable
*/
private function queueUrl()
{
return static function (callable $handler) {
return function (
CommandInterface $c,
RequestInterface $r = null
) use ($handler) {
if ($c->hasParam('QueueUrl')) {
$r = $r->withUri(UriResolver::resolve(
$r->getUri(),
new Uri($c['QueueUrl'])
));
}
return $handler($c, $r);
};
};
}
/**
* Calculates the expected md5 hash of message attributes according to the encoding
* scheme detailed in SQS documentation.
*
* @param array $message Message containing attributes for validation.
* Retrieved when using MessageAttributeNames on
* ReceiveMessage.
*
* @return string|null The md5 hash of the message attributes according to
* the encoding scheme. Returns null when there are no
* attributes.
* @link http://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/sqs-message-attributes.html#message-attributes-items-validation
*/
private static function calculateMessageAttributesMd5($message)
{
if (empty($message['MessageAttributes'])
|| !is_array($message['MessageAttributes'])
) {
return null;
}
ksort($message['MessageAttributes']);
$attributeValues = "";
foreach ($message['MessageAttributes'] as $name => $details) {
$attributeValues .= self::getEncodedStringPiece($name);
$attributeValues .= self::getEncodedStringPiece($details['DataType']);
if (substr($details['DataType'], 0, 6) === 'Binary') {
$attributeValues .= pack('c', 0x02);
$attributeValues .= self::getEncodedBinaryPiece(
$details['BinaryValue']
);
} else {
$attributeValues .= pack('c', 0x01);
$attributeValues .= self::getEncodedStringPiece(
$details['StringValue']
);
}
}
return md5($attributeValues);
}
private static function calculateBodyMd5($message)
{
return md5($message['Body']);
}
private static function getEncodedStringPiece($piece)
{
$utf8Piece = iconv(
mb_detect_encoding($piece, mb_detect_order(), true),
"UTF-8",
$piece
);
return self::getFourBytePieceLength($utf8Piece) . $utf8Piece;
}
private static function getEncodedBinaryPiece($piece)
{
return self::getFourBytePieceLength($piece) . $piece;
}
private static function getFourBytePieceLength($piece)
{
return pack('N', (int)strlen($piece));
}
/**
* Validates ReceiveMessage body and message attribute MD5s.
*
* @return callable
*/
private function validateMd5()
{
return static function (callable $handler) {
return function (
CommandInterface $c,
RequestInterface $r = null
) use ($handler) {
if ($c->getName() !== 'ReceiveMessage') {
return $handler($c, $r);
}
return $handler($c, $r)
->then(
function ($result) use ($c, $r) {
foreach ((array) $result['Messages'] as $msg) {
$bodyMd5 = self::calculateBodyMd5($msg);
if (isset($msg['MD5OfBody'])
&& $bodyMd5 !== $msg['MD5OfBody']
) {
throw new SqsException(
sprintf(
'MD5 mismatch. Expected %s, found %s',
$msg['MD5OfBody'],
$bodyMd5
),
$c,
[
'code' => 'ClientChecksumMismatch',
'request' => $r
]
);
}
if (isset($msg['MD5OfMessageAttributes'])) {
$messageAttributesMd5 = self::calculateMessageAttributesMd5($msg);
if ($messageAttributesMd5 !== $msg['MD5OfMessageAttributes']) {
throw new SqsException(
sprintf(
'Attribute MD5 mismatch. Expected %s, found %s',
$msg['MD5OfMessageAttributes'],
$messageAttributesMd5
? $messageAttributesMd5
: 'No Attributes'
),
$c,
[
'code' => 'ClientChecksumMismatch',
'request' => $r
]
);
}
} else if (isset($msg['MessageAttributes'])) {
throw new SqsException(
sprintf(
'No Attribute MD5 found. Expected %s',
self::calculateMessageAttributesMd5($msg)
),
$c,
[
'code' => 'ClientChecksumMismatch',
'request' => $r
]
);
}
}
return $result;
}
);
};
};
}
}