File indexing completed on 2024-06-16 05:30:24

 <?php
 /**
  * Zend Framework
  *
  * LICENSE
  *
  * This source file is subject to the new BSD license that is bundled
  * with this package in the file LICENSE.txt.
  * It is also available through the world-wide-web at this URL:
  * http://framework.zend.com/license/new-bsd
  * If you did not receive a copy of the license and are unable to
  * obtain it through the world-wide-web, please send an email
  * to license@zend.com so we can send you a copy immediately.
  *
  * @category   Zend
  * @package    Zend_Service
  * @subpackage Amazon_S3
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 /**
  * @see Zend_Service_Amazon_Abstract
  */
 // require_once 'Zend/Service/Amazon/Abstract.php';
 
 /**
  * @see Zend_Crypt_Hmac
  */
 // require_once 'Zend/Crypt/Hmac.php';
 
 /**
  * Amazon S3 PHP connection class
  *
  * @category   Zend
  * @package    Zend_Service
  * @subpackage Amazon_S3
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @see        http://docs.amazonwebservices.com/AmazonS3/2006-03-01/
  */
 class Zend_Service_Amazon_S3 extends Zend_Service_Amazon_Abstract
 {
     /**
      * Store for stream wrapper clients
      *
      * @var array
      */
     protected static $_wrapperClients = array();
 
     /**
      * Endpoint for the service
      *
      * @var Zend_Uri_Http
      */
     protected $_endpoint;
 
     const S3_ENDPOINT = 's3.amazonaws.com';
 
     const S3_ACL_PRIVATE = 'private';
     const S3_ACL_PUBLIC_READ = 'public-read';
     const S3_ACL_PUBLIC_WRITE = 'public-read-write';
     const S3_ACL_AUTH_READ = 'authenticated-read';
 
     const S3_REQUESTPAY_HEADER = 'x-amz-request-payer';
     const S3_ACL_HEADER = 'x-amz-acl';
     const S3_CONTENT_TYPE_HEADER = 'Content-Type';
 
     /**
      * Set S3 endpoint to use
      *
      * @param string|Zend_Uri_Http $endpoint
      * @return Zend_Service_Amazon_S3
      */
     public function setEndpoint($endpoint)
     {
         if (!($endpoint instanceof Zend_Uri_Http)) {
             $endpoint = Zend_Uri::factory($endpoint);
         }
         if (!$endpoint->valid()) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception('Invalid endpoint supplied');
         }
         $this->_endpoint = $endpoint;
         return $this;
     }
 
     /**
      * Get current S3 endpoint
      *
      * @return Zend_Uri_Http
      */
     public function getEndpoint()
     {
         return $this->_endpoint;
     }
 
     /**
      * Constructor
      *
      * @param string $accessKey
      * @param string $secretKey
      * @param string $region
      */
     public function __construct($accessKey=null, $secretKey=null, $region=null)
     {
         parent::__construct($accessKey, $secretKey, $region);
 
         $this->setEndpoint('http://'.self::S3_ENDPOINT);
     }
 
     /**
      * Verify if the bucket name is valid
      *
      * @param string $bucket
      * @return boolean
      */
     public function _validBucketName($bucket)
     {
         $len = strlen($bucket);
         if ($len < 3 || $len > 255) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Bucket name \"$bucket\" must be between 3 and 255 characters long");
         }
 
         if (preg_match('/[^a-z0-9\._-]/', $bucket)) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Bucket name \"$bucket\" contains invalid characters");
         }
 
         if (preg_match('/(\d){1,3}\.(\d){1,3}\.(\d){1,3}\.(\d){1,3}/', $bucket)) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Bucket name \"$bucket\" cannot be an IP address");
         }
         return true;
     }
 
     /**
      * Add a new bucket
      *
      * @param  string $bucket
      * @return boolean
      */
     public function createBucket($bucket, $location = null)
     {
         $this->_validBucketName($bucket);
         $headers=array();
         if($location) {
             $data = '<CreateBucketConfiguration><LocationConstraint>'.$location.'</LocationConstraint></CreateBucketConfiguration>';
             $headers[self::S3_CONTENT_TYPE_HEADER]= 'text/plain';
             $headers['Content-size']= strlen($data);
         } else {
             $data = null;
         }
         $response = $this->_makeRequest('PUT', $bucket, null, $headers, $data);
 
         return ($response->getStatus() == 200);
     }
 
     /**
      * Checks if a given bucket name is available
      *
      * @param  string $bucket
      * @return boolean
      */
     public function isBucketAvailable($bucket)
     {
         $response = $this->_makeRequest('HEAD', $bucket, array('max-keys'=>0));
 
         return ($response->getStatus() != 404);
     }
 
     /**
      * Checks if a given object exists
      *
      * @param  string $object
      * @return boolean
      */
     public function isObjectAvailable($object)
     {
         $object = $this->_fixupObjectName($object);
         $response = $this->_makeRequest('HEAD', $object);
 
         return ($response->getStatus() == 200);
     }
 
     /**
      * Remove a given bucket. All objects in the bucket must be removed prior
      * to removing the bucket.
      *
      * @param  string $bucket
      * @return boolean
      */
     public function removeBucket($bucket)
     {
         $response = $this->_makeRequest('DELETE', $bucket);
 
         // Look for a 204 No Content response
         return ($response->getStatus() == 204);
     }
 
     /**
      * Get metadata information for a given object
      *
      * @param  string $object
      * @return array|false
      */
     public function getInfo($object)
     {
         $info = array();
 
         $object = $this->_fixupObjectName($object);
         $response = $this->_makeRequest('HEAD', $object);
 
         if ($response->getStatus() == 200) {
             $info['type'] = $response->getHeader('Content-type');
             $info['size'] = $response->getHeader('Content-length');
             $info['mtime'] = strtotime($response->getHeader('Last-modified'));
             $info['etag'] = $response->getHeader('ETag');
         }
         else {
             return false;
         }
 
         return $info;
     }
 
     /**
      * List the S3 buckets
      *
      * @return array|false
      */
     public function getBuckets()
     {
         $response = $this->_makeRequest('GET');
 
         if ($response->getStatus() != 200) {
             return false;
         }
 
         $xml = new SimpleXMLElement($response->getBody());
 
         $buckets = array();
         foreach ($xml->Buckets->Bucket as $bucket) {
             $buckets[] = (string)$bucket->Name;
         }
 
         return $buckets;
     }
 
     /**
      * Remove all objects in the bucket.
      *
      * @param string $bucket
      * @return boolean
      */
     public function cleanBucket($bucket)
     {
         $objects = $this->getObjectsByBucket($bucket);
         if (!$objects) {
             return false;
         }
 
         while (!empty($objects)) {
             foreach ($objects as $object) {
                 $this->removeObject("$bucket/$object");
             }
             $params= array (
                 'marker' => $objects[count($objects)-1]
             );
             $objects = $this->getObjectsByBucket($bucket,$params);
         }
         
         return true;
     }
 
     /**
      * List the objects in a bucket.
      *
      * Provides the list of object keys that are contained in the bucket.  Valid params include the following.
      * prefix - Limits the response to keys which begin with the indicated prefix. You can use prefixes to separate a bucket into different sets of keys in a way similar to how a file system uses folders.
      * marker - Indicates where in the bucket to begin listing. The list will only include keys that occur lexicographically after marker. This is convenient for pagination: To get the next page of results use the last key of the current page as the marker.
      * max-keys - The maximum number of keys you'd like to see in the response body. The server might return fewer than this many keys, but will not return more.
      * delimiter - Causes keys that contain the same string between the prefix and the first occurrence of the delimiter to be rolled up into a single result element in the CommonPrefixes collection. These rolled-up keys are not returned elsewhere in the response.
      *
      * @param  string $bucket
      * @param array $params S3 GET Bucket Paramater
      * @return array|false
      */
     public function getObjectsByBucket($bucket, $params = array())
     {
         $response = $this->_makeRequest('GET', $bucket, $params);
 
         if ($response->getStatus() != 200) {
             return false;
         }
 
         $xml = new SimpleXMLElement($response->getBody());
 
         $objects = array();
         if (isset($xml->Contents)) {
             foreach ($xml->Contents as $contents) {
                 foreach ($contents->Key as $object) {
                     $objects[] = (string)$object;
                 }
             }
         }
 
         return $objects;
     }
      /**
      * List the objects and common prefixes in a bucket.
      *
      * Provides the list of object keys and common prefixes that are contained in the bucket.  Valid params include the following.
      * prefix - Limits the response to keys which begin with the indicated prefix. You can use prefixes to separate a bucket into different sets of keys in a way similar to how a file system uses folders.
      * marker - Indicates where in the bucket to begin listing. The list will only include keys that occur lexicographically after marker. This is convenient for pagination: To get the next page of results use the last key of the current page as the marker.
      * max-keys - The maximum number of keys you'd like to see in the response body. The server might return fewer than this many keys, but will not return more.
      * delimiter - Causes keys that contain the same string between the prefix and the first occurrence of the delimiter to be rolled up into a single result element in the CommonPrefixes collection. These rolled-up keys are not returned elsewhere in the response.
      *
      * @see ZF-11401
      * @param  string $bucket
      * @param array $params S3 GET Bucket Paramater
      * @return array|false
      */
     public function getObjectsAndPrefixesByBucket($bucket, $params = array())
     {
         $response = $this->_makeRequest('GET', $bucket, $params);
 
         if ($response->getStatus() != 200) {
             return false;
         }
 
         $xml = new SimpleXMLElement($response->getBody());
 
         $objects = array();
         if (isset($xml->Contents)) {
             foreach ($xml->Contents as $contents) {
                 foreach ($contents->Key as $object) {
                     $objects[] = (string)$object;
                 }
             }
         }
         $prefixes = array();
         if (isset($xml->CommonPrefixes)) {
             foreach ($xml->CommonPrefixes as $prefix) {
                 foreach ($prefix->Prefix as $object) {
                     $prefixes[] = (string)$object;
                 }
             }
         }
 
         return array(
             'objects'  => $objects,
             'prefixes' => $prefixes
         );
     }
     /**
      * Make sure the object name is valid
      *
      * @param  string $object
      * @return string
      */
     protected function _fixupObjectName($object)
     {
         $nameparts = explode('/', $object);
 
         $this->_validBucketName($nameparts[0]);
 
         $firstpart = array_shift($nameparts);
         if (count($nameparts) == 0) {
             return $firstpart;
         }
 
         return $firstpart.'/'.join('/', array_map('rawurlencode', $nameparts));
     }
 
     /**
      * Get an object
      *
      * @param  string $object
      * @param  bool   $paidobject This is "requestor pays" object
      * @return string|false
      */
     public function getObject($object, $paidobject=false)
     {
         $object = $this->_fixupObjectName($object);
         if ($paidobject) {
             $response = $this->_makeRequest('GET', $object, null, array(self::S3_REQUESTPAY_HEADER => 'requester'));
         }
         else {
             $response = $this->_makeRequest('GET', $object);
         }
 
         if ($response->getStatus() != 200) {
             return false;
         }
 
         return $response->getBody();
     }
 
     /**
      * Get an object using streaming
      *
      * Can use either provided filename for storage or create a temp file if none provided.
      *
      * @param  string $object Object path
      * @param  string $streamfile File to write the stream to
      * @param  bool   $paidobject This is "requestor pays" object
      * @return Zend_Http_Response_Stream|false
      */
     public function getObjectStream($object, $streamfile = null, $paidobject=false)
     {
         $object = $this->_fixupObjectName($object);
         self::getHttpClient()->setStream($streamfile?$streamfile:true);
         if ($paidobject) {
             $response = $this->_makeRequest('GET', $object, null, array(self::S3_REQUESTPAY_HEADER => 'requester'));
         }
         else {
             $response = $this->_makeRequest('GET', $object);
         }
         self::getHttpClient()->setStream(null);
 
         if ($response->getStatus() != 200 || !($response instanceof Zend_Http_Response_Stream)) {
             return false;
         }
 
         return $response;
     }
 
     /**
      * Upload an object by a PHP string
      *
      * @param  string $object Object name
      * @param  string|resource $data   Object data (can be string or stream)
      * @param  array  $meta   Metadata
      * @return boolean
      */
     public function putObject($object, $data, $meta=null)
     {
         $object = $this->_fixupObjectName($object);
         $headers = (is_array($meta)) ? $meta : array();
 
         if(!is_resource($data)) {
             $headers['Content-MD5'] = base64_encode(md5($data, true));
         }
         $headers['Expect'] = '100-continue';
 
         if (!isset($headers[self::S3_CONTENT_TYPE_HEADER])) {
             $headers[self::S3_CONTENT_TYPE_HEADER] = self::getMimeType($object);
         }
 
         $response = $this->_makeRequest('PUT', $object, null, $headers, $data);
 
         // Check the MD5 Etag returned by S3 against and MD5 of the buffer
         if ($response->getStatus() == 200) {
             // It is escaped by double quotes for some reason
             $etag = str_replace('"', '', $response->getHeader('Etag'));
 
             if (is_resource($data) || $etag == md5($data)) {
                 return true;
             }
         }
 
         return false;
     }
 
     /**
      * Put file to S3 as object
      *
      * @param string $path   File name
      * @param string $object Object name
      * @param array  $meta   Metadata
      * @return boolean
      */
     public function putFile($path, $object, $meta=null)
     {
         $data = @file_get_contents($path);
         if ($data === false) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Cannot read file $path");
         }
 
         if (!is_array($meta)) {
             $meta = array();
         }
 
         if (!isset($meta[self::S3_CONTENT_TYPE_HEADER])) {
            $meta[self::S3_CONTENT_TYPE_HEADER] = self::getMimeType($path);
         }
 
         return $this->putObject($object, $data, $meta);
     }
 
     /**
      * Put file to S3 as object, using streaming
      *
      * @param string $path   File name
      * @param string $object Object name
      * @param array  $meta   Metadata
      * @return boolean
      */
     public function putFileStream($path, $object, $meta=null)
     {
         $data = @fopen($path, "rb");
         if ($data === false) {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Cannot open file $path");
         }
 
         if (!is_array($meta)) {
             $meta = array();
         }
 
         if (!isset($meta[self::S3_CONTENT_TYPE_HEADER])) {
            $meta[self::S3_CONTENT_TYPE_HEADER] = self::getMimeType($path);
         }
 
         if(!isset($meta['Content-MD5'])) {
             $meta['Content-MD5'] = base64_encode(md5_file($path, true));
         }
 
         return $this->putObject($object, $data, $meta);
     }
 
     /**
      * Remove a given object
      *
      * @param  string $object
      * @return boolean
      */
     public function removeObject($object)
     {
         $object = $this->_fixupObjectName($object);
         $response = $this->_makeRequest('DELETE', $object);
 
         // Look for a 204 No Content response
         return ($response->getStatus() == 204);
     }
 
     /**
      * Copy an object
      *
      * @param  string $sourceObject  Source object name
      * @param  string $destObject    Destination object name
      * @param  array  $meta          (OPTIONAL) Metadata to apply to desination object.
      *                               Set to null to copy metadata from source object.
      * @return boolean
      */
     public function copyObject($sourceObject, $destObject, $meta = null)
     {
         $sourceObject = $this->_fixupObjectName($sourceObject);
         $destObject   = $this->_fixupObjectName($destObject);
 
         $headers = (is_array($meta)) ? $meta : array();
         $headers['x-amz-copy-source'] = $sourceObject;
         $headers['x-amz-metadata-directive'] = $meta === null ? 'COPY' : 'REPLACE';
 
         $response = $this->_makeRequest('PUT', $destObject, null, $headers);
 
         if ($response->getStatus() == 200 && !stristr($response->getBody(), '<Error>')) {
             return true;
         }
 
         return false;
     }
 
     /**
      * Move an object
      *
      * Performs a copy to dest + verify + remove source
      *
      * @param string $sourceObject  Source object name
      * @param string $destObject    Destination object name
      * @param array  $meta          (OPTIONAL) Metadata to apply to destination object.
      *                              Set to null to retain existing metadata.
      */
     public function moveObject($sourceObject, $destObject, $meta = null)
     {
         $sourceInfo = $this->getInfo($sourceObject);
 
         $this->copyObject($sourceObject, $destObject, $meta);
         $destInfo = $this->getInfo($destObject);
 
         if ($sourceInfo['etag'] === $destInfo['etag']) {
             return $this->removeObject($sourceObject);
         } else {
             return false;
         }
     }
 
     /**
      * Make a request to Amazon S3
      *
      * @param  string $method    Request method
      * @param  string $path        Path to requested object
      * @param  array  $params    Request parameters
      * @param  array  $headers    HTTP headers
      * @param  string|resource $data        Request data
      * @return Zend_Http_Response
      */
     public function _makeRequest($method, $path='', $params=null, $headers=array(), $data=null)
     {
         $retry_count = 0;
 
         if (!is_array($headers)) {
             $headers = array($headers);
         }
 
         $headers['Date'] = gmdate(DATE_RFC1123, time());
 
         if(is_resource($data) && $method != 'PUT') {
             /**
              * @see Zend_Service_Amazon_S3_Exception
              */
             // require_once 'Zend/Service/Amazon/S3/Exception.php';
             throw new Zend_Service_Amazon_S3_Exception("Only PUT request supports stream data");
         }
 
         // build the end point out
         $parts = explode('/', $path, 2);
         $endpoint = clone($this->_endpoint);
         if ($parts[0]) {
             // prepend bucket name to the hostname
             $endpoint->setHost($parts[0].'.'.$endpoint->getHost());
         }
         if (!empty($parts[1])) {
             // ZF-10218, ZF-10122
             $pathparts = explode('?',$parts[1]);
             $endpath = $pathparts[0];
             $endpoint->setPath('/'.$endpath);
             
         }
         else {
             $endpoint->setPath('/');
             if ($parts[0]) {
                 $path = $parts[0].'/';
             }
         }
         self::addSignature($method, $path, $headers);
 
         $client = self::getHttpClient();
 
         $client->resetParameters(true);
         $client->setUri($endpoint);
         $client->setAuth(false);
         // Work around buglet in HTTP client - it doesn't clean headers
         // Remove when ZHC is fixed
         /*
         $client->setHeaders(array('Content-MD5'              => null,
                                   'Content-Encoding'         => null,
                                   'Expect'                   => null,
                                   'Range'                    => null,
                                   'x-amz-acl'                => null,
                                   'x-amz-copy-source'        => null,
                                   'x-amz-metadata-directive' => null));
         */
         $client->setHeaders($headers);
 
         if (is_array($params)) {
             foreach ($params as $name=>$value) {
                 $client->setParameterGet($name, $value);
             }
          }
 
          if (($method == 'PUT') && ($data !== null)) {
              if (!isset($headers['Content-type'])) {
                  $headers['Content-type'] = self::getMimeType($path);
              }
              $client->setRawData($data, $headers['Content-type']);
          } 
          do {
             $retry = false;
 
             $response = $client->request($method);
             $response_code = $response->getStatus();
 
             // Some 5xx errors are expected, so retry automatically
             if ($response_code >= 500 && $response_code < 600 && $retry_count <= 5) {
                 $retry = true;
                 $retry_count++;
                 sleep($retry_count / 4 * $retry_count);
             }
             else if ($response_code == 307) {
                 // Need to redirect, new S3 endpoint given
                 // This should never happen as Zend_Http_Client will redirect automatically
             }
             else if ($response_code == 100) {
                 // echo 'OK to Continue';
             }
         } while ($retry);
 
         return $response;
     }
 
     /**
      * Add the S3 Authorization signature to the request headers
      *
      * @param  string $method
      * @param  string $path
      * @param  array &$headers
      * @return string
      */
     protected function addSignature($method, $path, &$headers)
     {
         if (!is_array($headers)) {
             $headers = array($headers);
         }
 
         $type = $md5 = $date = '';
 
         // Search for the Content-type, Content-MD5 and Date headers
         foreach ($headers as $key=>$val) {
             if (strcasecmp($key, 'content-type') == 0) {
                 $type = $val;
             }
             else if (strcasecmp($key, 'content-md5') == 0) {
                 $md5 = $val;
             }
             else if (strcasecmp($key, 'date') == 0) {
                 $date = $val;
             }
         }
 
         // If we have an x-amz-date header, use that instead of the normal Date
         if (isset($headers['x-amz-date']) && isset($date)) {
             $date = '';
         }
 
         $sig_str = "$method\n$md5\n$type\n$date\n";
         // For x-amz- headers, combine like keys, lowercase them, sort them
         // alphabetically and remove excess spaces around values
         $amz_headers = array();
         foreach ($headers as $key=>$val) {
             $key = strtolower($key);
             if (substr($key, 0, 6) == 'x-amz-') {
                 if (is_array($val)) {
                     $amz_headers[$key] = $val;
                 }
                 else {
                     $amz_headers[$key][] = preg_replace('/\s+/', ' ', $val);
                 }
             }
         }
         if (!empty($amz_headers)) {
             ksort($amz_headers);
             foreach ($amz_headers as $key=>$val) {
                 $sig_str .= $key.':'.implode(',', $val)."\n";
             }
         }
 
         $sig_str .= '/'.parse_url($path, PHP_URL_PATH);
         if (strpos($path, '?location') !== false) {
             $sig_str .= '?location';
         }
         else if (strpos($path, '?acl') !== false) {
             $sig_str .= '?acl';
         }
         else if (strpos($path, '?torrent') !== false) {
             $sig_str .= '?torrent';
         }
         else if (strpos($path, '?versions') !== false) {
             $sig_str .= '?versions';
         }
 
         $signature = base64_encode(Zend_Crypt_Hmac::compute($this->_getSecretKey(), 'sha1', utf8_encode($sig_str), Zend_Crypt_Hmac::BINARY));
         $headers['Authorization'] = 'AWS '.$this->_getAccessKey().':'.$signature;
 
         return $sig_str;
     }
 
     /**
      * Attempt to get the content-type of a file based on the extension
      *
      * @param  string $path
      * @return string
      */
     public static function getMimeType($path)
     {
         $ext = substr(strrchr($path, '.'), 1);
 
         if(!$ext) {
             // shortcut
             return 'binary/octet-stream';
         }
 
         switch (strtolower($ext)) {
             case 'xls':
                 $content_type = 'application/excel';
                 break;
             case 'hqx':
                 $content_type = 'application/macbinhex40';
                 break;
             case 'doc':
             case 'dot':
             case 'wrd':
                 $content_type = 'application/msword';
                 break;
             case 'pdf':
                 $content_type = 'application/pdf';
                 break;
             case 'pgp':
                 $content_type = 'application/pgp';
                 break;
             case 'ps':
             case 'eps':
             case 'ai':
                 $content_type = 'application/postscript';
                 break;
             case 'ppt':
                 $content_type = 'application/powerpoint';
                 break;
             case 'rtf':
                 $content_type = 'application/rtf';
                 break;
             case 'tgz':
             case 'gtar':
                 $content_type = 'application/x-gtar';
                 break;
             case 'gz':
                 $content_type = 'application/x-gzip';
                 break;
             case 'php':
             case 'php3':
             case 'php4':
                 $content_type = 'application/x-httpd-php';
                 break;
             case 'js':
                 $content_type = 'application/x-javascript';
                 break;
             case 'ppd':
             case 'psd':
                 $content_type = 'application/x-photoshop';
                 break;
             case 'swf':
             case 'swc':
             case 'rf':
                 $content_type = 'application/x-shockwave-flash';
                 break;
             case 'tar':
                 $content_type = 'application/x-tar';
                 break;
             case 'zip':
                 $content_type = 'application/zip';
                 break;
             case 'mid':
             case 'midi':
             case 'kar':
                 $content_type = 'audio/midi';
                 break;
             case 'mp2':
             case 'mp3':
             case 'mpga':
                 $content_type = 'audio/mpeg';
                 break;
             case 'ra':
                 $content_type = 'audio/x-realaudio';
                 break;
             case 'wav':
                 $content_type = 'audio/wav';
                 break;
             case 'bmp':
                 $content_type = 'image/bitmap';
                 break;
             case 'gif':
                 $content_type = 'image/gif';
                 break;
             case 'iff':
                 $content_type = 'image/iff';
                 break;
             case 'jb2':
                 $content_type = 'image/jb2';
                 break;
             case 'jpg':
             case 'jpe':
             case 'jpeg':
                 $content_type = 'image/jpeg';
                 break;
             case 'jpx':
                 $content_type = 'image/jpx';
                 break;
             case 'png':
                 $content_type = 'image/png';
                 break;
             case 'tif':
             case 'tiff':
                 $content_type = 'image/tiff';
                 break;
             case 'wbmp':
                 $content_type = 'image/vnd.wap.wbmp';
                 break;
             case 'xbm':
                 $content_type = 'image/xbm';
                 break;
             case 'css':
                 $content_type = 'text/css';
                 break;
             case 'txt':
                 $content_type = 'text/plain';
                 break;
             case 'htm':
             case 'html':
                 $content_type = 'text/html';
                 break;
             case 'xml':
                 $content_type = 'text/xml';
                 break;
             case 'xsl':
                 $content_type = 'text/xsl';
                 break;
             case 'mpg':
             case 'mpe':
             case 'mpeg':
                 $content_type = 'video/mpeg';
                 break;
             case 'qt':
             case 'mov':
                 $content_type = 'video/quicktime';
                 break;
             case 'avi':
                 $content_type = 'video/x-ms-video';
                 break;
             case 'eml':
                 $content_type = 'message/rfc822';
                 break;
             default:
                 $content_type = 'binary/octet-stream';
                 break;
         }
 
         return $content_type;
     }
 
     /**
      * Register this object as stream wrapper client
      *
      * @param  string $name
      * @return Zend_Service_Amazon_S3
      */
     public function registerAsClient($name)
     {
         self::$_wrapperClients[$name] = $this;
         return $this;
     }
 
     /**
      * Unregister this object as stream wrapper client
      *
      * @param  string $name
      * @return Zend_Service_Amazon_S3
      */
     public function unregisterAsClient($name)
     {
         unset(self::$_wrapperClients[$name]);
         return $this;
     }
 
     /**
      * Get wrapper client for stream type
      *
      * @param  string $name
      * @return Zend_Service_Amazon_S3
      */
     public static function getWrapperClient($name)
     {
         return self::$_wrapperClients[$name];
     }
 
     /**
      * Register this object as stream wrapper
      *
      * @param  string $name
      * @return Zend_Service_Amazon_S3
      */
     public function registerStreamWrapper($name='s3')
     {
         /**
          * @see Zend_Service_Amazon_S3_Stream
          */
         // require_once 'Zend/Service/Amazon/S3/Stream.php';
 
         stream_register_wrapper($name, 'Zend_Service_Amazon_S3_Stream');
         $this->registerAsClient($name);
     }
 
     /**
      * Unregister this object as stream wrapper
      *
      * @param  string $name
      * @return Zend_Service_Amazon_S3
      */
     public function unregisterStreamWrapper($name='s3')
     {
         stream_wrapper_unregister($name);
         $this->unregisterAsClient($name);
     }
 }