<?php

/**

* $Id$

*

* Copyright (c) 2011, Donovan Schönknecht.  All rights reserved.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions are met:

*

* - Redistributions of source code must retain the above copyright notice,

*   this list of conditions and the following disclaimer.

* - Redistributions in binary form must reproduce the above copyright

*   notice, this list of conditions and the following disclaimer in the

*   documentation and/or other materials provided with the distribution.

*

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

* POSSIBILITY OF SUCH DAMAGE.

*

* Amazon S3 is a trademark of Amazon.com, Inc. or its affiliates.

*/



/**

* Amazon S3 PHP class

*

* @link http://undesigned.org.za/2007/10/22/amazon-s3-php-class

* @version 0.5.0-dev

*/

class S3

{

	// ACL flags

	const ACL_PRIVATE = 'private';

	const ACL_PUBLIC_READ = 'public-read';

	const ACL_PUBLIC_READ_WRITE = 'public-read-write';

	const ACL_AUTHENTICATED_READ = 'authenticated-read';



	const STORAGE_CLASS_STANDARD = 'STANDARD';

	const STORAGE_CLASS_RRS = 'REDUCED_REDUNDANCY';



	private static $__accessKey = null; // AWS Access key

	private static $__secretKey = null; // AWS Secret key

	private static $__sslKey = null;



	public static $endpoint = 's3.amazonaws.com';

	public static $proxy = null;



	public static $useSSL = false;

	public static $useSSLValidation = true;

	public static $useExceptions = false;



	// SSL CURL SSL options - only needed if you are experiencing problems with your OpenSSL configuration

	public static $sslKey = null;

	public static $sslCert = null;

	public static $sslCACert = null;



	private static $__signingKeyPairId = null; // AWS Key Pair ID

	private static $__signingKeyResource = false; // Key resource, freeSigningKey() must be called to clear it from memory





	/**

	* Constructor - if you're not using the class statically

	*

	* @param array configuration

	* @return void

	*/

	public function __construct($config = array())

	{

		if (empty($config)) {

			get_instance()->config->load('s3', TRUE);

			$config = get_instance()->config->item('s3');

		}

	

	    $this->initialize($config);

	}

	

	

	/**

	 * CodeIgniter support

	 * 

	 * @param array configuration

	 * @return void

	 */

	public function initialize($config) {

	    foreach ($config as $key => $val) {

		    if(!in_array($key, array('accessKey', 'secretKey'))) {

			    self::$key = $val;

		    }

		}

		

		if (isset($config["accessKey"]) && isset($config["secretKey"]))

			self::setAuth($this->accessKey, $this->secretKey);

	}





	/**

	* Set the sertvice endpoint

	*

	* @param string $host Hostname

	* @return void

	*/

	public function setEndpoint($host)

	{

		self::$endpoint = $host;

	}



	/**

	* Set AWS access key and secret key

	*

	* @param string $accessKey Access key

	* @param string $secretKey Secret key

	* @return void

	*/

	public static function setAuth($accessKey, $secretKey)

	{

		self::$__accessKey = $accessKey;

		self::$__secretKey = $secretKey;

	}





	/**

	* Check if AWS keys have been set

	*

	* @return boolean

	*/

	public static function hasAuth() {

		return (self::$__accessKey !== null && self::$__secretKey !== null);

	}





	/**

	* Set SSL on or off

	*

	* @param boolean $enabled SSL enabled

	* @param boolean $validate SSL certificate validation

	* @return void

	*/

	public static function setSSL($enabled, $validate = true)

	{

		self::$useSSL = $enabled;

		self::$useSSLValidation = $validate;

	}





	/**

	* Set SSL client certificates (experimental)

	*

	* @param string $sslCert SSL client certificate

	* @param string $sslKey SSL client key

	* @param string $sslCACert SSL CA cert (only required if you are having problems with your system CA cert)

	* @return void

	*/

	public static function setSSLAuth($sslCert = null, $sslKey = null, $sslCACert = null)

	{

		self::$sslCert = $sslCert;

		self::$sslKey = $sslKey;

		self::$sslCACert = $sslCACert;

	}





	/**

	* Set proxy information

	*

	* @param string $host Proxy hostname and port (localhost:1234)

	* @param string $user Proxy username

	* @param string $pass Proxy password

	* @param constant $type CURL proxy type

	* @return void

	*/

	public static function setProxy($host, $user = null, $pass = null, $type = CURLPROXY_SOCKS5)

	{

		self::$proxy = array('host' => $host, 'type' => $type, 'user' => null, 'pass' => 'null');

	}





	/**

	* Set the error mode to exceptions

	*

	* @param boolean $enabled Enable exceptions

	* @return void

	*/

	public static function setExceptions($enabled = true)

	{

		self::$useExceptions = $enabled;

	}





	/**

	* Set signing key

	*

	* @param string $keyPairId AWS Key Pair ID

	* @param string $signingKey Private Key

	* @param boolean $isFile Load private key from file, set to false to load string

	* @return boolean

	*/

	public static function setSigningKey($keyPairId, $signingKey, $isFile = true)

	{

		self::$__signingKeyPairId = $keyPairId;

		if ((self::$__signingKeyResource = openssl_pkey_get_private($isFile ?

		file_get_contents($signingKey) : $signingKey)) !== false) return true;

		self::__triggerError('S3::setSigningKey(): Unable to open load private key: '.$signingKey, __FILE__, __LINE__);

		return false;

	}





	/**

	* Free signing key from memory, MUST be called if you are using setSigningKey()

	*

	* @return void

	*/

	public static function freeSigningKey()

	{

		if (self::$__signingKeyResource !== false)

			openssl_free_key(self::$__signingKeyResource);

	}





	/**

	* Internal error handler

	*

	* @internal Internal error handler

	* @param string $message Error message

	* @param string $file Filename

	* @param integer $line Line number

	* @param integer $code Error code

	* @return void

	*/

	private static function __triggerError($message, $file, $line, $code = 0)

	{

		if (self::$useExceptions)

			throw new S3Exception($message, $file, $line, $code);

		else

			trigger_error($message, E_USER_WARNING);

	}





	/**

	* Get a list of buckets

	*

	* @param boolean $detailed Returns detailed bucket list when true

	* @return array | false

	*/

	public static function listBuckets($detailed = false)

	{

		$rest = new S3Request('GET', '', '', self::$endpoint);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::listBuckets(): [%s] %s", $rest->error['code'],

			$rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		$results = array();

		if (!isset($rest->body->Buckets)) return $results;



		if ($detailed)

		{

			if (isset($rest->body->Owner, $rest->body->Owner->ID, $rest->body->Owner->DisplayName))

			$results['owner'] = array(

				'id' => (string)$rest->body->Owner->ID, 'name' => (string)$rest->body->Owner->ID

			);

			$results['buckets'] = array();

			foreach ($rest->body->Buckets->Bucket as $b)

				$results['buckets'][] = array(

					'name' => (string)$b->Name, 'time' => strtotime((string)$b->CreationDate)

				);

		} else

			foreach ($rest->body->Buckets->Bucket as $b) $results[] = (string)$b->Name;



		return $results;

	}





	/*

	* Get contents for a bucket

	*

	* If maxKeys is null this method will loop through truncated result sets

	*

	* @param string $bucket Bucket name

	* @param string $prefix Prefix

	* @param string $marker Marker (last file listed)

	* @param string $maxKeys Max keys (maximum number of keys to return)

	* @param string $delimiter Delimiter

	* @param boolean $returnCommonPrefixes Set to true to return CommonPrefixes

	* @return array | false

	*/

	public static function getBucket($bucket, $prefix = null, $marker = null, $maxKeys = null, $delimiter = null, $returnCommonPrefixes = false)

	{

		$rest = new S3Request('GET', $bucket, '', self::$endpoint);

		if ($maxKeys == 0) $maxKeys = null;

		if ($prefix !== null && $prefix !== '') $rest->setParameter('prefix', $prefix);

		if ($marker !== null && $marker !== '') $rest->setParameter('marker', $marker);

		if ($maxKeys !== null && $maxKeys !== '') $rest->setParameter('max-keys', $maxKeys);

		if ($delimiter !== null && $delimiter !== '') $rest->setParameter('delimiter', $delimiter);

		$response = $rest->getResponse();

		if ($response->error === false && $response->code !== 200)

			$response->error = array('code' => $response->code, 'message' => 'Unexpected HTTP status');

		if ($response->error !== false)

		{

			self::__triggerError(sprintf("S3::getBucket(): [%s] %s",

			$response->error['code'], $response->error['message']), __FILE__, __LINE__);

			return false;

		}



		$results = array();



		$nextMarker = null;

		if (isset($response->body, $response->body->Contents))

		foreach ($response->body->Contents as $c)

		{

			$results[(string)$c->Key] = array(

				'name' => (string)$c->Key,

				'time' => strtotime((string)$c->LastModified),

				'size' => (int)$c->Size,

				'hash' => substr((string)$c->ETag, 1, -1)

			);

			$nextMarker = (string)$c->Key;

		}



		if ($returnCommonPrefixes && isset($response->body, $response->body->CommonPrefixes))

			foreach ($response->body->CommonPrefixes as $c)

				$results[(string)$c->Prefix] = array('prefix' => (string)$c->Prefix);



		if (isset($response->body, $response->body->IsTruncated) &&

		(string)$response->body->IsTruncated == 'false') return $results;



		if (isset($response->body, $response->body->NextMarker))

			$nextMarker = (string)$response->body->NextMarker;



		// Loop through truncated results if maxKeys isn't specified

		if ($maxKeys == null && $nextMarker !== null && (string)$response->body->IsTruncated == 'true')

		do

		{

			$rest = new S3Request('GET', $bucket, '', self::$endpoint);

			if ($prefix !== null && $prefix !== '') $rest->setParameter('prefix', $prefix);

			$rest->setParameter('marker', $nextMarker);

			if ($delimiter !== null && $delimiter !== '') $rest->setParameter('delimiter', $delimiter);



			if (($response = $rest->getResponse()) == false || $response->code !== 200) break;



			if (isset($response->body, $response->body->Contents))

			foreach ($response->body->Contents as $c)

			{

				$results[(string)$c->Key] = array(

					'name' => (string)$c->Key,

					'time' => strtotime((string)$c->LastModified),

					'size' => (int)$c->Size,

					'hash' => substr((string)$c->ETag, 1, -1)

				);

				$nextMarker = (string)$c->Key;

			}



			if ($returnCommonPrefixes && isset($response->body, $response->body->CommonPrefixes))

				foreach ($response->body->CommonPrefixes as $c)

					$results[(string)$c->Prefix] = array('prefix' => (string)$c->Prefix);



			if (isset($response->body, $response->body->NextMarker))

				$nextMarker = (string)$response->body->NextMarker;



		} while ($response !== false && (string)$response->body->IsTruncated == 'true');



		return $results;

	}





	/**

	* Put a bucket

	*

	* @param string $bucket Bucket name

	* @param constant $acl ACL flag

	* @param string $location Set as "EU" to create buckets hosted in Europe

	* @return boolean

	*/

	public static function putBucket($bucket, $acl = self::ACL_PRIVATE, $location = false)

	{

		$rest = new S3Request('PUT', $bucket, '', self::$endpoint);

		$rest->setAmzHeader('x-amz-acl', $acl);



		if ($location !== false)

		{

			$dom = new DOMDocument;

			$createBucketConfiguration = $dom->createElement('CreateBucketConfiguration');

			$locationConstraint = $dom->createElement('LocationConstraint', $location);

			$createBucketConfiguration->appendChild($locationConstraint);

			$dom->appendChild($createBucketConfiguration);

			$rest->data = $dom->saveXML();

			$rest->size = strlen($rest->data);

			$rest->setHeader('Content-Type', 'application/xml');

		}

		$rest = $rest->getResponse();



		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::putBucket({$bucket}, {$acl}, {$location}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Delete an empty bucket

	*

	* @param string $bucket Bucket name

	* @return boolean

	*/

	public static function deleteBucket($bucket)

	{

		$rest = new S3Request('DELETE', $bucket, '', self::$endpoint);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 204)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::deleteBucket({$bucket}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Create input info array for putObject()

	*

	* @param string $file Input file

	* @param mixed $md5sum Use MD5 hash (supply a string if you want to use your own)

	* @return array | false

	*/

	public static function inputFile($file, $md5sum = true)

	{

		if (!file_exists($file) || !is_file($file) || !is_readable($file))

		{

			self::__triggerError('S3::inputFile(): Unable to open input file: '.$file, __FILE__, __LINE__);

			return false;

		}

		return array('file' => $file, 'size' => filesize($file), 'md5sum' => $md5sum !== false ?

		(is_string($md5sum) ? $md5sum : base64_encode(md5_file($file, true))) : '');

	}





	/**

	* Create input array info for putObject() with a resource

	*

	* @param string $resource Input resource to read from

	* @param integer $bufferSize Input byte size

	* @param string $md5sum MD5 hash to send (optional)

	* @return array | false

	*/

	public static function inputResource(&$resource, $bufferSize, $md5sum = '')

	{

		if (!is_resource($resource) || $bufferSize < 0)

		{

			self::__triggerError('S3::inputResource(): Invalid resource or buffer size', __FILE__, __LINE__);

			return false;

		}

		$input = array('size' => $bufferSize, 'md5sum' => $md5sum);

		$input['fp'] =& $resource;

		return $input;

	}





	/**

	* Put an object

	*

	* @param mixed $input Input data

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param constant $acl ACL constant

	* @param array $metaHeaders Array of x-amz-meta-* headers

	* @param array $requestHeaders Array of request headers or content type as a string

	* @param constant $storageClass Storage class constant

	* @return boolean

	*/

	public static function putObject($input, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $requestHeaders = array(), $storageClass = self::STORAGE_CLASS_STANDARD)

	{

		if ($input === false) return false;

		$rest = new S3Request('PUT', $bucket, $uri, self::$endpoint);



		if (!is_array($input)) $input = array(

			'data' => $input, 'size' => strlen($input),

			'md5sum' => base64_encode(md5($input, true))

		);



		// Data

		if (isset($input['fp']))

			$rest->fp =& $input['fp'];

		elseif (isset($input['file']))

			$rest->fp = @fopen($input['file'], 'rb');

		elseif (isset($input['data']))

			$rest->data = $input['data'];



		// Content-Length (required)

		if (isset($input['size']) && $input['size'] >= 0)

			$rest->size = $input['size'];

		else {

			if (isset($input['file']))

				$rest->size = filesize($input['file']);

			elseif (isset($input['data']))

				$rest->size = strlen($input['data']);

		}



		// Custom request headers (Content-Type, Content-Disposition, Content-Encoding)

		if (is_array($requestHeaders))

			foreach ($requestHeaders as $h => $v) $rest->setHeader($h, $v);

		elseif (is_string($requestHeaders)) // Support for legacy contentType parameter

			$input['type'] = $requestHeaders;



		// Content-Type

		if (!isset($input['type']))

		{

			if (isset($requestHeaders['Content-Type']))

				$input['type'] =& $requestHeaders['Content-Type'];

			elseif (isset($input['file']))

				$input['type'] = self::__getMimeType($input['file']);

			else

				$input['type'] = 'application/octet-stream';

		}



		if ($storageClass !== self::STORAGE_CLASS_STANDARD) // Storage class

			$rest->setAmzHeader('x-amz-storage-class', $storageClass);



		// We need to post with Content-Length and Content-Type, MD5 is optional

		if ($rest->size >= 0 && ($rest->fp !== false || $rest->data !== false))

		{

			$rest->setHeader('Content-Type', $input['type']);

			if (isset($input['md5sum'])) $rest->setHeader('Content-MD5', $input['md5sum']);



			$rest->setAmzHeader('x-amz-acl', $acl);

			foreach ($metaHeaders as $h => $v) $rest->setAmzHeader('x-amz-meta-'.$h, $v);

			$rest->getResponse();

		} else

			$rest->response->error = array('code' => 0, 'message' => 'Missing input parameters');



		if ($rest->response->error === false && $rest->response->code !== 200)

			$rest->response->error = array('code' => $rest->response->code, 'message' => 'Unexpected HTTP status');

		if ($rest->response->error !== false)

		{

			self::__triggerError(sprintf("S3::putObject(): [%s] %s",

			$rest->response->error['code'], $rest->response->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Put an object from a file (legacy function)

	*

	* @param string $file Input file path

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param constant $acl ACL constant

	* @param array $metaHeaders Array of x-amz-meta-* headers

	* @param string $contentType Content type

	* @return boolean

	*/

	public static function putObjectFile($file, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $contentType = null)

	{

		return self::putObject(self::inputFile($file), $bucket, $uri, $acl, $metaHeaders, $contentType);

	}





	/**

	* Put an object from a string (legacy function)

	*

	* @param string $string Input data

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param constant $acl ACL constant

	* @param array $metaHeaders Array of x-amz-meta-* headers

	* @param string $contentType Content type

	* @return boolean

	*/

	public static function putObjectString($string, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $contentType = 'text/plain')

	{

		return self::putObject($string, $bucket, $uri, $acl, $metaHeaders, $contentType);

	}





	/**

	* Get an object

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param mixed $saveTo Filename or resource to write to

	* @return mixed

	*/

	public static function getObject($bucket, $uri, $saveTo = false)

	{

		$rest = new S3Request('GET', $bucket, $uri, self::$endpoint);

		if ($saveTo !== false)

		{

			if (is_resource($saveTo))

				$rest->fp =& $saveTo;

			else

				if (($rest->fp = @fopen($saveTo, 'wb')) !== false)

					$rest->file = realpath($saveTo);

				else

					$rest->response->error = array('code' => 0, 'message' => 'Unable to open save file for writing: '.$saveTo);

		}

		if ($rest->response->error === false) $rest->getResponse();



		if ($rest->response->error === false && $rest->response->code !== 200)

			$rest->response->error = array('code' => $rest->response->code, 'message' => 'Unexpected HTTP status');

		if ($rest->response->error !== false)

		{

			self::__triggerError(sprintf("S3::getObject({$bucket}, {$uri}): [%s] %s",

			$rest->response->error['code'], $rest->response->error['message']), __FILE__, __LINE__);

			return false;

		}

		return $rest->response;

	}





	/**

	* Get object information

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param boolean $returnInfo Return response information

	* @return mixed | false

	*/

	public static function getObjectInfo($bucket, $uri, $returnInfo = true)

	{

		$rest = new S3Request('HEAD', $bucket, $uri, self::$endpoint);

		$rest = $rest->getResponse();

		if ($rest->error === false && ($rest->code !== 200 && $rest->code !== 404))

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::getObjectInfo({$bucket}, {$uri}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return $rest->code == 200 ? $returnInfo ? $rest->headers : true : false;

	}





	/**

	* Copy an object

	*

	* @param string $bucket Source bucket name

	* @param string $uri Source object URI

	* @param string $bucket Destination bucket name

	* @param string $uri Destination object URI

	* @param constant $acl ACL constant

	* @param array $metaHeaders Optional array of x-amz-meta-* headers

	* @param array $requestHeaders Optional array of request headers (content type, disposition, etc.)

	* @param constant $storageClass Storage class constant

	* @return mixed | false

	*/

	public static function copyObject($srcBucket, $srcUri, $bucket, $uri, $acl = self::ACL_PRIVATE, $metaHeaders = array(), $requestHeaders = array(), $storageClass = self::STORAGE_CLASS_STANDARD)

	{

		$rest = new S3Request('PUT', $bucket, $uri, self::$endpoint);

		$rest->setHeader('Content-Length', 0);

		foreach ($requestHeaders as $h => $v) $rest->setHeader($h, $v);

		foreach ($metaHeaders as $h => $v) $rest->setAmzHeader('x-amz-meta-'.$h, $v);

		if ($storageClass !== self::STORAGE_CLASS_STANDARD) // Storage class

			$rest->setAmzHeader('x-amz-storage-class', $storageClass);

		$rest->setAmzHeader('x-amz-acl', $acl);

		$rest->setAmzHeader('x-amz-copy-source', sprintf('/%s/%s', $srcBucket, rawurlencode($srcUri)));

		if (sizeof($requestHeaders) > 0 || sizeof($metaHeaders) > 0)

			$rest->setAmzHeader('x-amz-metadata-directive', 'REPLACE');



		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::copyObject({$srcBucket}, {$srcUri}, {$bucket}, {$uri}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return isset($rest->body->LastModified, $rest->body->ETag) ? array(

			'time' => strtotime((string)$rest->body->LastModified),

			'hash' => substr((string)$rest->body->ETag, 1, -1)

		) : false;

	}





	/**

	* Set logging for a bucket

	*

	* @param string $bucket Bucket name

	* @param string $targetBucket Target bucket (where logs are stored)

	* @param string $targetPrefix Log prefix (e,g; domain.com-)

	* @return boolean

	*/

	public static function setBucketLogging($bucket, $targetBucket, $targetPrefix = null)

	{

		// The S3 log delivery group has to be added to the target bucket's ACP

		if ($targetBucket !== null && ($acp = self::getAccessControlPolicy($targetBucket, '')) !== false)

		{

			// Only add permissions to the target bucket when they do not exist

			$aclWriteSet = false;

			$aclReadSet = false;

			foreach ($acp['acl'] as $acl)

			if ($acl['type'] == 'Group' && $acl['uri'] == 'http://acs.amazonaws.com/groups/s3/LogDelivery')

			{

				if ($acl['permission'] == 'WRITE') $aclWriteSet = true;

				elseif ($acl['permission'] == 'READ_ACP') $aclReadSet = true;

			}

			if (!$aclWriteSet) $acp['acl'][] = array(

				'type' => 'Group', 'uri' => 'http://acs.amazonaws.com/groups/s3/LogDelivery', 'permission' => 'WRITE'

			);

			if (!$aclReadSet) $acp['acl'][] = array(

				'type' => 'Group', 'uri' => 'http://acs.amazonaws.com/groups/s3/LogDelivery', 'permission' => 'READ_ACP'

			);

			if (!$aclReadSet || !$aclWriteSet) self::setAccessControlPolicy($targetBucket, '', $acp);

		}



		$dom = new DOMDocument;

		$bucketLoggingStatus = $dom->createElement('BucketLoggingStatus');

		$bucketLoggingStatus->setAttribute('xmlns', 'http://s3.amazonaws.com/doc/2006-03-01/');

		if ($targetBucket !== null)

		{

			if ($targetPrefix == null) $targetPrefix = $bucket . '-';

			$loggingEnabled = $dom->createElement('LoggingEnabled');

			$loggingEnabled->appendChild($dom->createElement('TargetBucket', $targetBucket));

			$loggingEnabled->appendChild($dom->createElement('TargetPrefix', $targetPrefix));

			// TODO: Add TargetGrants?

			$bucketLoggingStatus->appendChild($loggingEnabled);

		}

		$dom->appendChild($bucketLoggingStatus);



		$rest = new S3Request('PUT', $bucket, '', self::$endpoint);

		$rest->setParameter('logging', null);

		$rest->data = $dom->saveXML();

		$rest->size = strlen($rest->data);

		$rest->setHeader('Content-Type', 'application/xml');

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::setBucketLogging({$bucket}, {$targetBucket}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Get logging status for a bucket

	*

	* This will return false if logging is not enabled.

	* Note: To enable logging, you also need to grant write access to the log group

	*

	* @param string $bucket Bucket name

	* @return array | false

	*/

	public static function getBucketLogging($bucket)

	{

		$rest = new S3Request('GET', $bucket, '', self::$endpoint);

		$rest->setParameter('logging', null);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::getBucketLogging({$bucket}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		if (!isset($rest->body->LoggingEnabled)) return false; // No logging

		return array(

			'targetBucket' => (string)$rest->body->LoggingEnabled->TargetBucket,

			'targetPrefix' => (string)$rest->body->LoggingEnabled->TargetPrefix,

		);

	}





	/**

	* Disable bucket logging

	*

	* @param string $bucket Bucket name

	* @return boolean

	*/

	public static function disableBucketLogging($bucket)

	{

		return self::setBucketLogging($bucket, null);

	}





	/**

	* Get a bucket's location

	*

	* @param string $bucket Bucket name

	* @return string | false

	*/

	public static function getBucketLocation($bucket)

	{

		$rest = new S3Request('GET', $bucket, '', self::$endpoint);

		$rest->setParameter('location', null);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::getBucketLocation({$bucket}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return (isset($rest->body[0]) && (string)$rest->body[0] !== '') ? (string)$rest->body[0] : 'US';

	}





	/**

	* Set object or bucket Access Control Policy

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param array $acp Access Control Policy Data (same as the data returned from getAccessControlPolicy)

	* @return boolean

	*/

	public static function setAccessControlPolicy($bucket, $uri = '', $acp = array())

	{

		$dom = new DOMDocument;

		$dom->formatOutput = true;

		$accessControlPolicy = $dom->createElement('AccessControlPolicy');

		$accessControlList = $dom->createElement('AccessControlList');



		// It seems the owner has to be passed along too

		$owner = $dom->createElement('Owner');

		$owner->appendChild($dom->createElement('ID', $acp['owner']['id']));

		$owner->appendChild($dom->createElement('DisplayName', $acp['owner']['name']));

		$accessControlPolicy->appendChild($owner);



		foreach ($acp['acl'] as $g)

		{

			$grant = $dom->createElement('Grant');

			$grantee = $dom->createElement('Grantee');

			$grantee->setAttribute('xmlns:xsi', 'http://www.w3.org/2001/XMLSchema-instance');

			if (isset($g['id']))

			{ // CanonicalUser (DisplayName is omitted)

				$grantee->setAttribute('xsi:type', 'CanonicalUser');

				$grantee->appendChild($dom->createElement('ID', $g['id']));

			}

			elseif (isset($g['email']))

			{ // AmazonCustomerByEmail

				$grantee->setAttribute('xsi:type', 'AmazonCustomerByEmail');

				$grantee->appendChild($dom->createElement('EmailAddress', $g['email']));

			}

			elseif ($g['type'] == 'Group')

			{ // Group

				$grantee->setAttribute('xsi:type', 'Group');

				$grantee->appendChild($dom->createElement('URI', $g['uri']));

			}

			$grant->appendChild($grantee);

			$grant->appendChild($dom->createElement('Permission', $g['permission']));

			$accessControlList->appendChild($grant);

		}



		$accessControlPolicy->appendChild($accessControlList);

		$dom->appendChild($accessControlPolicy);



		$rest = new S3Request('PUT', $bucket, $uri, self::$endpoint);

		$rest->setParameter('acl', null);

		$rest->data = $dom->saveXML();

		$rest->size = strlen($rest->data);

		$rest->setHeader('Content-Type', 'application/xml');

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::setAccessControlPolicy({$bucket}, {$uri}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Get object or bucket Access Control Policy

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @return mixed | false

	*/

	public static function getAccessControlPolicy($bucket, $uri = '')

	{

		$rest = new S3Request('GET', $bucket, $uri, self::$endpoint);

		$rest->setParameter('acl', null);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::getAccessControlPolicy({$bucket}, {$uri}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}



		$acp = array();

		if (isset($rest->body->Owner, $rest->body->Owner->ID, $rest->body->Owner->DisplayName))

			$acp['owner'] = array(

				'id' => (string)$rest->body->Owner->ID, 'name' => (string)$rest->body->Owner->DisplayName

			);



		if (isset($rest->body->AccessControlList))

		{

			$acp['acl'] = array();

			foreach ($rest->body->AccessControlList->Grant as $grant)

			{

				foreach ($grant->Grantee as $grantee)

				{

					if (isset($grantee->ID, $grantee->DisplayName)) // CanonicalUser

						$acp['acl'][] = array(

							'type' => 'CanonicalUser',

							'id' => (string)$grantee->ID,

							'name' => (string)$grantee->DisplayName,

							'permission' => (string)$grant->Permission

						);

					elseif (isset($grantee->EmailAddress)) // AmazonCustomerByEmail

						$acp['acl'][] = array(

							'type' => 'AmazonCustomerByEmail',

							'email' => (string)$grantee->EmailAddress,

							'permission' => (string)$grant->Permission

						);

					elseif (isset($grantee->URI)) // Group

						$acp['acl'][] = array(

							'type' => 'Group',

							'uri' => (string)$grantee->URI,

							'permission' => (string)$grant->Permission

						);

					else continue;

				}

			}

		}

		return $acp;

	}





	/**

	* Delete an object

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @return boolean

	*/

	public static function deleteObject($bucket, $uri)

	{

		$rest = new S3Request('DELETE', $bucket, $uri, self::$endpoint);

		$rest = $rest->getResponse();

		if ($rest->error === false && $rest->code !== 204)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::deleteObject(): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Get a query string authenticated URL

	*

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @param integer $lifetime Lifetime in seconds

	* @param boolean $hostBucket Use the bucket name as the hostname

	* @param boolean $https Use HTTPS ($hostBucket should be false for SSL verification)

	* @return string

	*/

	public static function getAuthenticatedURL($bucket, $uri, $lifetime, $hostBucket = false, $https = false)

	{

		$expires = time() + $lifetime;

		$uri = str_replace(array('%2F', '%2B'), array('/', '+'), rawurlencode($uri));

		return sprintf(($https ? 'https' : 'http').'://%s/%s?AWSAccessKeyId=%s&Expires=%u&Signature=%s',

		// $hostBucket ? $bucket : $bucket.'.s3.amazonaws.com', $uri, self::$__accessKey, $expires,

		$hostBucket ? $bucket : 's3.amazonaws.com/'.$bucket, $uri, self::$__accessKey, $expires,

		urlencode(self::__getHash("GET\n\n\n{$expires}\n/{$bucket}/{$uri}")));

	}





	/**

	* Get a CloudFront signed policy URL

	*

	* @param array $policy Policy

	* @return string

	*/

	public static function getSignedPolicyURL($policy)

	{

		$data = json_encode($policy);

		$signature = '';

		if (!openssl_sign($data, $signature, self::$__signingKeyResource)) return false;



		$encoded = str_replace(array('+', '='), array('-', '_', '~'), base64_encode($data));

		$signature = str_replace(array('+', '='), array('-', '_', '~'), base64_encode($signature));



		$url = $policy['Statement'][0]['Resource'] . '?';

		foreach (array('Policy' => $encoded, 'Signature' => $signature, 'Key-Pair-Id' => self::$__signingKeyPairId) as $k => $v)

			$url .= $k.'='.str_replace('%2F', '/', rawurlencode($v)).'&';

		return substr($url, 0, -1);

	}





	/**

	* Get a CloudFront canned policy URL

	*

	* @param string $string URL to sign

	* @param integer $lifetime URL lifetime

	* @return string

	*/

	public static function getSignedCannedURL($url, $lifetime)

	{

		return self::getSignedPolicyURL(array(

			'Statement' => array(

				array('Resource' => $url, 'Condition' => array(

					'DateLessThan' => array('AWS:EpochTime' => time() + $lifetime)

				))

			)

		));

	}





	/**

	* Get upload POST parameters for form uploads

	*

	* @param string $bucket Bucket name

	* @param string $uriPrefix Object URI prefix

	* @param constant $acl ACL constant

	* @param integer $lifetime Lifetime in seconds

	* @param integer $maxFileSize Maximum filesize in bytes (default 5MB)

	* @param string $successRedirect Redirect URL or 200 / 201 status code

	* @param array $amzHeaders Array of x-amz-meta-* headers

	* @param array $headers Array of request headers or content type as a string

	* @param boolean $flashVars Includes additional "Filename" variable posted by Flash

	* @return object

	*/

	public static function getHttpUploadPostParams($bucket, $uriPrefix = '', $acl = self::ACL_PRIVATE, $lifetime = 3600,

	$maxFileSize = 5242880, $successRedirect = "201", $amzHeaders = array(), $headers = array(), $flashVars = false)

	{

		// Create policy object

		$policy = new stdClass;

		$policy->expiration = gmdate('Y-m-d\TH:i:s\Z', (time() + $lifetime));

		$policy->conditions = array();

		$obj = new stdClass; $obj->bucket = $bucket; array_push($policy->conditions, $obj);

		$obj = new stdClass; $obj->acl = $acl; array_push($policy->conditions, $obj);



		$obj = new stdClass; // 200 for non-redirect uploads

		if (is_numeric($successRedirect) && in_array((int)$successRedirect, array(200, 201)))

			$obj->success_action_status = (string)$successRedirect;

		else // URL

			$obj->success_action_redirect = $successRedirect;

		array_push($policy->conditions, $obj);



		if ($acl !== self::ACL_PUBLIC_READ)

			array_push($policy->conditions, array('eq', '$acl', $acl));



		array_push($policy->conditions, array('starts-with', '$key', $uriPrefix));

		if ($flashVars) array_push($policy->conditions, array('starts-with', '$Filename', ''));

		foreach (array_keys($headers) as $headerKey)

			array_push($policy->conditions, array('starts-with', '$'.$headerKey, ''));

		foreach ($amzHeaders as $headerKey => $headerVal)

		{

			$obj = new stdClass;

			$obj->{$headerKey} = (string)$headerVal;

			array_push($policy->conditions, $obj);

		}

		array_push($policy->conditions, array('content-length-range', 0, $maxFileSize));

		$policy = base64_encode(str_replace('\/', '/', json_encode($policy)));



		// Create parameters

		$params = new stdClass;

		$params->AWSAccessKeyId = self::$__accessKey;

		$params->key = $uriPrefix.'${filename}';

		$params->acl = $acl;

		$params->policy = $policy; unset($policy);

		$params->signature = self::__getHash($params->policy);

		if (is_numeric($successRedirect) && in_array((int)$successRedirect, array(200, 201)))

			$params->success_action_status = (string)$successRedirect;

		else

			$params->success_action_redirect = $successRedirect;

		foreach ($headers as $headerKey => $headerVal) $params->{$headerKey} = (string)$headerVal;

		foreach ($amzHeaders as $headerKey => $headerVal) $params->{$headerKey} = (string)$headerVal;

		return $params;

	}





	/**

	* Create a CloudFront distribution

	*

	* @param string $bucket Bucket name

	* @param boolean $enabled Enabled (true/false)

	* @param array $cnames Array containing CNAME aliases

	* @param string $comment Use the bucket name as the hostname

	* @param string $defaultRootObject Default root object

	* @param string $originAccessIdentity Origin access identity

	* @param array $trustedSigners Array of trusted signers

	* @return array | false

	*/

	public static function createDistribution($bucket, $enabled = true, $cnames = array(), $comment = null, $defaultRootObject = null, $originAccessIdentity = null, $trustedSigners = array())

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::createDistribution({$bucket}, ".(int)$enabled.", [], '$comment'): %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}

		$useSSL = self::$useSSL;



		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('POST', '', '2010-11-01/distribution', 'cloudfront.amazonaws.com');

		$rest->data = self::__getCloudFrontDistributionConfigXML(

			$bucket.'.s3.amazonaws.com',

			$enabled,

			(string)$comment,

			(string)microtime(true),

			$cnames,

			$defaultRootObject,

			$originAccessIdentity,

			$trustedSigners

		);



		$rest->size = strlen($rest->data);

		$rest->setHeader('Content-Type', 'application/xml');

		$rest = self::__getCloudFrontResponse($rest);



		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 201)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::createDistribution({$bucket}, ".(int)$enabled.", [], '$comment'): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		} elseif ($rest->body instanceof SimpleXMLElement)

			return self::__parseCloudFrontDistributionConfig($rest->body);

		return false;

	}





	/**

	* Get CloudFront distribution info

	*

	* @param string $distributionId Distribution ID from listDistributions()

	* @return array | false

	*/

	public static function getDistribution($distributionId)

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::getDistribution($distributionId): %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}

		$useSSL = self::$useSSL;



		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('GET', '', '2010-11-01/distribution/'.$distributionId, 'cloudfront.amazonaws.com');

		$rest = self::__getCloudFrontResponse($rest);



		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::getDistribution($distributionId): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		elseif ($rest->body instanceof SimpleXMLElement)

		{

			$dist = self::__parseCloudFrontDistributionConfig($rest->body);

			$dist['hash'] = $rest->headers['hash'];

			$dist['id'] = $distributionId;

			return $dist;

		}

		return false;

	}





	/**

	* Update a CloudFront distribution

	*

	* @param array $dist Distribution array info identical to output of getDistribution()

	* @return array | false

	*/

	public static function updateDistribution($dist)

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::updateDistribution({$dist['id']}): %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}



		$useSSL = self::$useSSL;



		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('PUT', '', '2010-11-01/distribution/'.$dist['id'].'/config', 'cloudfront.amazonaws.com');

		$rest->data = self::__getCloudFrontDistributionConfigXML(

			$dist['origin'],

			$dist['enabled'],

			$dist['comment'],

			$dist['callerReference'],

			$dist['cnames'],

			$dist['defaultRootObject'],

			$dist['originAccessIdentity'],

			$dist['trustedSigners']

		);



		$rest->size = strlen($rest->data);

		$rest->setHeader('If-Match', $dist['hash']);

		$rest = self::__getCloudFrontResponse($rest);



		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::updateDistribution({$dist['id']}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		} else {

			$dist = self::__parseCloudFrontDistributionConfig($rest->body);

			$dist['hash'] = $rest->headers['hash'];

			return $dist;

		}

		return false;

	}





	/**

	* Delete a CloudFront distribution

	*

	* @param array $dist Distribution array info identical to output of getDistribution()

	* @return boolean

	*/

	public static function deleteDistribution($dist)

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::deleteDistribution({$dist['id']}): %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}



		$useSSL = self::$useSSL;



		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('DELETE', '', '2008-06-30/distribution/'.$dist['id'], 'cloudfront.amazonaws.com');

		$rest->setHeader('If-Match', $dist['hash']);

		$rest = self::__getCloudFrontResponse($rest);



		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 204)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::deleteDistribution({$dist['id']}): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		return true;

	}





	/**

	* Get a list of CloudFront distributions

	*

	* @return array

	*/

	public static function listDistributions()

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::listDistributions(): [%s] %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}



		$useSSL = self::$useSSL;

		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('GET', '', '2010-11-01/distribution', 'cloudfront.amazonaws.com');

		$rest = self::__getCloudFrontResponse($rest);

		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			self::__triggerError(sprintf("S3::listDistributions(): [%s] %s",

			$rest->error['code'], $rest->error['message']), __FILE__, __LINE__);

			return false;

		}

		elseif ($rest->body instanceof SimpleXMLElement && isset($rest->body->DistributionSummary))

		{

			$list = array();

			if (isset($rest->body->Marker, $rest->body->MaxItems, $rest->body->IsTruncated))

			{

				//$info['marker'] = (string)$rest->body->Marker;

				//$info['maxItems'] = (int)$rest->body->MaxItems;

				//$info['isTruncated'] = (string)$rest->body->IsTruncated == 'true' ? true : false;

			}

			foreach ($rest->body->DistributionSummary as $summary)

				$list[(string)$summary->Id] = self::__parseCloudFrontDistributionConfig($summary);



			return $list;

		}

		return array();

	}



	/**

	* List CloudFront Origin Access Identities

	*

	* @return array

	*/

	public static function listOriginAccessIdentities()

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::listOriginAccessIdentities(): [%s] %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}



		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('GET', '', '2010-11-01/origin-access-identity/cloudfront', 'cloudfront.amazonaws.com');

		$rest = self::__getCloudFrontResponse($rest);

		$useSSL = self::$useSSL;



		if ($rest->error === false && $rest->code !== 200)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			trigger_error(sprintf("S3::listOriginAccessIdentities(): [%s] %s",

			$rest->error['code'], $rest->error['message']), E_USER_WARNING);

			return false;

		}



		if (isset($rest->body->CloudFrontOriginAccessIdentitySummary))

		{

			$identities = array();

			foreach ($rest->body->CloudFrontOriginAccessIdentitySummary as $identity)

				if (isset($identity->S3CanonicalUserId))

					$identities[(string)$identity->Id] = array('id' => (string)$identity->Id, 's3CanonicalUserId' => (string)$identity->S3CanonicalUserId);

			return $identities;

		}

		return false;

	}





	/**

	* Invalidate objects in a CloudFront distribution

	*

	* Thanks to Martin Lindkvist for S3::invalidateDistribution()

	*

	* @param string $distributionId Distribution ID from listDistributions()

	* @param array $paths Array of object paths to invalidate

	* @return boolean

	*/

	public static function invalidateDistribution($distributionId, $paths)

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::invalidateDistribution(): [%s] %s",

			"CloudFront functionality requires SSL"), __FILE__, __LINE__);

			return false;

		}



		$useSSL = self::$useSSL;

		self::$useSSL = true; // CloudFront requires SSL

		$rest = new S3Request('POST', '', '2010-08-01/distribution/'.$distributionId.'/invalidation', 'cloudfront.amazonaws.com');

		$rest->data = self::__getCloudFrontInvalidationBatchXML($paths, (string)microtime(true));

		$rest->size = strlen($rest->data);

		$rest = self::__getCloudFrontResponse($rest);

		self::$useSSL = $useSSL;



		if ($rest->error === false && $rest->code !== 201)

			$rest->error = array('code' => $rest->code, 'message' => 'Unexpected HTTP status');

		if ($rest->error !== false)

		{

			trigger_error(sprintf("S3::invalidate('{$distributionId}',{$paths}): [%s] %s",

			$rest->error['code'], $rest->error['message']), E_USER_WARNING);

			return false;

		}

		return true;

	}





	/**

	* Get a InvalidationBatch DOMDocument

	*

	* @internal Used to create XML in invalidateDistribution()

	* @param array $paths Paths to objects to invalidateDistribution

	* @return string

	*/

	private static function __getCloudFrontInvalidationBatchXML($paths, $callerReference = '0') {

		$dom = new DOMDocument('1.0', 'UTF-8');

		$dom->formatOutput = true;

		$invalidationBatch = $dom->createElement('InvalidationBatch');

		foreach ($paths as $path)

			$invalidationBatch->appendChild($dom->createElement('Path', $path));



		$invalidationBatch->appendChild($dom->createElement('CallerReference', $callerReference));

		$dom->appendChild($invalidationBatch);

		return $dom->saveXML();

	}





	/**

	* List your invalidation batches for invalidateDistribution() in a CloudFront distribution

	*

	* http://docs.amazonwebservices.com/AmazonCloudFront/latest/APIReference/ListInvalidation.html

	* returned array looks like this:

	*	Array

	*	(

	*		[I31TWB0CN9V6XD] => InProgress

	*		[IT3TFE31M0IHZ] => Completed

	*		[I12HK7MPO1UQDA] => Completed

	*		[I1IA7R6JKTC3L2] => Completed

	*	)

    *

	* @param string $distributionId Distribution ID from listDistributions()

	* @return array

	*/

	public static function getDistributionInvalidationList($distributionId)

	{

		if (!extension_loaded('openssl'))

		{

			self::__triggerError(sprintf("S3::getDistributionInvalidationList(): [%s] %s",

			"CloudFront functionality requires S…