/**
* Read from the stream
*
* http://bugs.php.net/21641 - stream_read() is always passed PHP's
* internal read buffer size (8192) no matter what is passed as $count
* parameter to fread().
*
* @param integer $count
* @return string
*/
public function stream_read($count)
{
if (!$this->_objectName) {
return false;
}
// make sure that count doesn't exceed object size
if ($count + $this->_position > $this->_objectSize) {
$count = $this->_objectSize - $this->_position;
}
$range_start = $this->_position;
$range_end = $this->_position + $count;
// Only fetch more data from S3 if we haven't fetched any data yet (postion=0)
// OR, the range end position is greater than the size of the current object
// buffer AND if the range end position is less than or equal to the object's
// size returned by S3
if ($this->_position == 0 || $range_end > strlen($this->_objectBuffer) && $range_end <= $this->_objectSize) {
$headers = array('Range' => "bytes={$range_start}-{$range_end}");
$response = $this->_s3->_makeRequest('GET', $this->_objectName, null, $headers);
if ($response->getStatusCode() == 206) {
// 206 Partial Content
$this->_objectBuffer .= $response->getBody();
}
}
$data = substr($this->_objectBuffer, $this->_position, $count);
$this->_position += strlen($data);
return $data;
}