/wp-content/plugins/w3-total-cache/lib/S3.php

<?php

/**

* $Id: S3.php 47 2009-07-20 01:25:40Z don.schonknecht $

*

* Copyright (c) 2008, 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 0.4.0

*/

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 LOCATION_US = '';

	const LOCATION_EU = 'EU';

	const LOCATION_US_WEST = 'us-west-1';

	const LOCATION_AP_SOUTHEAST = 'ap-southeast-1';



	const ORIGIN_TYPE_S3 = 'S3';

	const ORIING_TYPE_CUSTOM = 'Custom';



	public static $useSSL = true;



	private static $__accessKey; // AWS Access key

	private static $__secretKey; // AWS Secret key





	/**

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

	*

	* @param string $accessKey Access key

	* @param string $secretKey Secret key

	* @param boolean $useSSL Enable SSL

	* @return void

	*/

	public function __construct($accessKey = null, $secretKey = null, $useSSL = true) {

		if ($accessKey !== null && $secretKey !== null)

			self::setAuth($accessKey, $secretKey);

		self::$useSSL = $useSSL;

	}





	/**

	* 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;

	}





	/**

	* 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', '', '');

		$rest = $rest->getResponse();

		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::listBuckets(): [%s] %s",

                $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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, '');

		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) {

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

                $response->error['code'],

                $response->error['message']

            ), E_USER_WARNING);

			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, '');

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

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

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



			if (($response = $rest->getResponse(true)) == 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, '');

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



		if ($location) {

			$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) {

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

                $bucket,

                $acl,

                $location,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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);

		$rest = $rest->getResponse();

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

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

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

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

                $bucket,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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)) {

			trigger_error('S3::inputFile(): Unable to open input file: '.$file, E_USER_WARNING);

			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) {

			trigger_error('S3::inputResource(): Invalid resource or buffer size', E_USER_WARNING);

			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

	* @return boolean

	*/

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

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

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



		if (is_string($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';

		}



		// 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) {

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

                $rest->response->error['code'],

                $rest->response->error['message']

            ), E_USER_WARNING);

			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);

		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) {

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

                $bucket,

                $uri,

                $saveTo,

			    $rest->response->error['code'],

                $rest->response->error['message']

            ), E_USER_WARNING);

			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);

		$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) {

			trigger_error(sprintf("S3::getObjectInfo('%s', '%s', %d): [%s] %s",

                $bucket,

                $uri,

                $returnInfo,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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.)

	* @return mixed | false

	*/

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

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

		$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);

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

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

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

                $srcBucket,

                $srcUri,

                $bucket,

                $uri,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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, '');

		$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) {

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

                $bucket,

                $targetBucket,

                $targetPrefix,

                $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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, '');

		$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) {

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

                $bucket,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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, '');

		$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) {

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

                $bucket,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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);

		$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) {

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

                $bucket,

                $uri,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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);

		$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) {

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

                $bucket,

                $uri,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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);

		$rest = $rest->getResponse();

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

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

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

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

                $bucket,

                $uri,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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;

		$uri = str_replace('%2F', '/', rawurlencode($uri)); // URI should be encoded (thanks Sean O'Dea)

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

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

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

	}



	/**

	* 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);



		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 $dnsName Origin DNS name

	* @param string $originType Origin Type

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

	* @param array $cnames Array containing CNAME aliases

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

	* @return array | false

	*/

	public static function createDistribution($dnsName, $originType = self::ORIGIN_TYPE_S3, $enabled = true, $cnames = array(), $comment = '') {

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

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

		$rest->data = self::__getCloudFrontDistributionConfigXML($dnsName, $originType, $enabled, $comment, (string)microtime(true), $cnames);

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

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

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



		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::createDistribution('%s', '%s', %d, '%s', '%s'): [%s] %s",

                $dnsName,

                $originType,

                $enabled,

                implode(', ', $cnames),

                $comment,

    			$rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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) {

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

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

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



		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::getDistribution(%d): [%s] %s",

                $distributionId,

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			return false;

		} elseif ($rest->body instanceof SimpleXMLElement) {

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

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

			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) {

		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['type'], $dist['enabled'], $dist['comment'], $dist['callerReference'], $dist['cnames']);

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

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

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



		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::updateDistribution('%s'): [%s] %s",

                serialize($dist),

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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) {

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

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

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

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



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

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

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

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

                serialize($dist),

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			return false;

		}

		return true;

	}





	/**

	* Get a list of CloudFront distributions

	*

	* @return array

	*/

	public static function listDistributions() {

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

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

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



		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::listDistributions(): [%s] %s",

			    $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

			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();

	}





	/**

	* Get a DistributionConfig DOMDocument

	*

	* @internal Used to create XML in createDistribution() and updateDistribution()

	* @param string $dnsName Origin DNS name

	* @param string $originType Origin type

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

	* @param string $comment Comment to append

	* @param string $callerReference Caller reference

	* @param array $cnames Array of CNAME aliases

	* @return string

	*/

	private static function __getCloudFrontDistributionConfigXML($dnsName, $originType, $enabled, $comment, $callerReference = '0', $cnames = array()) {

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



        $dom->formatOutput = true;

		$distributionConfig = $dom->createElement('DistributionConfig');

		$distributionConfig->setAttribute('xmlns', 'http://cloudfront.amazonaws.com/doc/2010-11-01/');



		if ($originType == 's3') {

			$origin = $dom->createElement('S3Origin');

			$origin->appendChild($dom->createElement('DNSName', $dnsName));

		} else {

			$origin = $dom->createElement('CustomOrigin');

			$origin->appendChild($dom->createElement('DNSName', $dnsName));

			$origin->appendChild($dom->createElement('OriginProtocolPolicy', 'http-only'));

		}



		$distributionConfig->appendChild($origin);

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



		foreach ($cnames as $cname) {

			$distributionConfig->appendChild($dom->createElement('CNAME', $cname));

        }



		if ($comment !== '') {

            $distributionConfig->appendChild($dom->createElement('Comment', $comment));

        }



		$distributionConfig->appendChild($dom->createElement('Enabled', $enabled ? 'true' : 'false'));

		$dom->appendChild($distributionConfig);



		return $dom->saveXML();

	}





	/**

	* Parse a CloudFront distribution config

	*

	* @internal Used to parse the CloudFront DistributionConfig node to an array

	* @param object &$node DOMNode

	* @return array

	*/

	private static function __parseCloudFrontDistributionConfig(&$node) {

		$dist = array();



        if (isset($node->Id)) {

            $dist['id'] = (string) $node->Id;

        }



        if (isset($node->Status)) {

            $dist['status'] = (string) $node->Status;

        }



        if (isset($node->LastModifiedTime)) {

            $dist['time'] = strtotime((string) $node->LastModifiedTime);

        }



        if (isset($node->DomainName)) {

            $dist['domain'] = (string) $node->DomainName;

        }



        if (isset($node->S3Origin)) {

            $dist['type'] = 's3';



            if (isset($node->S3Origin->DNSName)) {

                $dist['origin'] = (string) $node->S3Origin->DNSName;

            }

        } elseif (isset($node->CustomOrigin)) {

            $dist['type'] = 'custom';



            if (isset($node->CustomOrigin->DNSName)) {

                $dist['origin'] = (string) $node->CustomOrigin->DNSName;

            }

        }



        if (isset($node->CallerReference)) {

            $dist['callerReference'] = (string) $node->CallerReference;

        }



        if (isset($node->CNAME)) {

            $dist['cnames'] = array();



            foreach ($node->CNAME as $cname) {

                $dist['cnames'][] = (string) $cname;

            }

        }



        if (isset($node->Comment)) {

            $dist['comment'] = (string) $node->Comment;

        }



        if (isset($node->Enabled)) {

            $dist['enabled'] = ((string) $node->Enabled == 'true' ? true : false);

        }



        if (isset($node->DistributionConfig)) {

            $dist = array_merge($dist, self::__parseCloudFrontDistributionConfig($node->DistributionConfig));

        }



		return $dist;

	}





    /**

     * Creates invalidation bath

     *

     * @static

     * @param integer $distributionId

     * @param array $paths

     * @return array|bool

     */

    public static function createInvalidation($distributionId, $paths) {

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



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



        $rest->data = self::__getCloudFrontInvalidationBath($paths);

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

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



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



        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::createInvalidation(%d, '%s'): [%s] %s",

                $distributionId,

                implode(', ', $paths),

                $rest->error['code'],

                $rest->error['message']

            ), E_USER_WARNING);

            return false;

        } elseif ($rest->body instanceof SimpleXMLElement) {

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

        }



        return false;

    }





    /**

     * Returns invalidation bath XML

     *

     * @static

     * @param array $files

     * @return string

     */

    private static function __getCloudFrontInvalidationBath($paths) {

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

        $dom->formatOutput = true;



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



        foreach ($paths as $path) {

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

        }



        $invalidationBath->appendChild($dom->createElement('CallerReference', date('YmdHis')));

        $dom->appendChild($invalidationBath);



        return $dom->saveXML();

    }





    /**

     * Parse CloudFront invalidation XML

     *

     * @static

     * @param DOMNode $node

     * @return array

     */

    private static function __parseCloudFrontInvalidation(&$node) {

        $invalidation = array();



        if (isset($node->Id)) {

            $invalidation['id'] = $node->Id;

        }



        if (isset($node->Status)) {

            $invalidation['status'] = $node->Status;

        }



        if (isset($node->CreateTime)) {

            $invalidation['createTime'] = $node->CreateTime;

        }



        if (isset($node->InvalidationBatch)) {

            $invalidation['invalidationBath'] = array();



            foreach ($node->InvalidationBatch as $path) {

                $invalidation['invalidationBath'][] = $path;

            }

        }



        return $invalidation;

    }





	/**

	* Grab CloudFront response

	*

	* @internal Used to parse the CloudFront S3Request::getResponse() output

	* @param object &$rest S3Request instance

	* @return object

	*/

	private static function __getCloudFrontResponse(&$rest) {

		$rest->getResponse();

		if ($rest->response->error === false && isset($rest->response->body) &&

		is_string($rest->response->body) && substr($rest->response->body, 0, 5) == '<?xml') {

			$rest->response->body = simplexml_load_string($rest->response->body);

			// Grab CloudFront errors

			if (isset($rest->response->body->Error, $rest->response->body->Error->Code,

			$rest->response->body->Error->Message)) {

				$rest->response->error = array(

					'code' => (string)$rest->response->body->Error->Code,

					'message' => (string)$rest->response->body->Error->Message

				);

				unset($rest->response->body);

			}

		}

		return $rest->response;

	}





	/**

	* Get MIME type for file

	*

	* @internal Used to get mime types

	* @param string &$file File path

	* @return string

	*/

	public static function __getMimeType(&$file) {

		require_once W3TC_INC_DIR . '/functions/mime.php';



		$type = w3_get_mime_type($file);



		return $type;

	}





	/**

	* Generate the auth string: "AWS AccessKey:Signature"

	*

	* @internal Used by S3Request::getResponse()

	* @param string $string String to sign

	* @return string

	*/

	public static function __getSignature($string) {

		return 'AWS '.self::$__accessKey.':'.self::__getHash($string);

	}





	/**

	* Creates a HMAC-SHA1 hash

	*

	* This uses the hash extension if loaded

	*

	* @internal Used by __getSignature()

	* @param string $string String to sign

	* @return string

	*/

	private static function __getHash($string) {

		return base64_encode(extension_loaded('hash') ?

		hash_hmac('sha1', $string, self::$__secretKey, true) : pack('H*', sha1(

		(str_pad(self::$__secretKey, 64, chr(0x00)) ^ (str_repeat(chr(0x5c), 64))) .

		pack('H*', sha1((str_pad(self::$__secretKey, 64, chr(0x00)) ^

		(str_repeat(chr(0x36), 64))) . $string)))));

	}



}



final class S3Request {

	private $verb;

    private $bucket;

    private $uri;

    private $resource = '';

    private $parameters = array();

    private	$amzHeaders = array();



    public $fp = false;

    public $size = 0;

    public $data = false;

    public $response;

    public $headers = array(

		'Host' => '',

        'Date' => '',

        'Content-MD5' => '',

        'Content-Type' => ''

	);



	/**

	* Constructor

	*

	* @param string $verb Verb

	* @param string $bucket Bucket name

	* @param string $uri Object URI

	* @return mixed

	*/

	function __construct($verb, $bucket = '', $uri = '', $defaultHost = 's3.amazonaws.com') {

		$this->verb = $verb;

		$this->bucket = strtolower($bucket);

		$this->uri = $uri !== '' ? '/'.str_replace('%2F', '/', rawurlencode($uri)) : '/';



		if ($this->bucket !== '') {

			$this->headers['Host'] = $this->bucket.'.'.$defaultHost;

			$this->resource = '/'.$this->bucket.$this->uri;

		} else {

			$this->headers['Host'] = $defaultHost;

			//$this->resource = strlen($this->uri) > 1 ? '/'.$this->bucket.$this->uri : $this->uri;

			$this->resource = $this->uri;

		}

		$this->headers['Date'] = gmdate('D, d M Y H:i:s T');



		$this->response = new STDClass;

		$this->response->error = false;

	}





	/**

	* Set request parameter

	*

	* @param string $key Key

	* @param string $value Value

	* @return void

	*/

	public function setParameter($key, $value) {

		$this->parameters[$key] = $value;

	}





	/**

	* Set request header

	*

	* @param string $key Key

	* @param string $value Value

	* @return void

	*/

	public function setHeader($key, $value) {

		$this->headers[$key] = $value;

	}





	/**

	* Set x-amz-meta-* header

	*

	* @param string $key Key

	* @param string $value Value

	* @return void

	*/

	public function setAmzHeader($key, $value) {

		$this->amzHeaders[$key] = $value;

	}





	/**

	* Get the S3 response

	*

	* @return object | false

	*/

	public function getResponse() {

		$query = '';

		if (sizeof($this->parameters) > 0) {

			$query = substr($this->uri, -1) !== '?' ? '?' : '&';

			foreach ($this->parameters as $var => $value)

				if ($value == null || $value == '') $query .= $var.'&';

				// Parameters should be encoded (thanks Sean O'Dea)

				else $query .= $var.'='.rawurlencode($value).'&'