amazon s3 get file size/change content type (v1/v2)

s3upload.php

//3. Deal with s3/file map
/*use Aws\Common\Aws;
use Aws\Common\Enum\Region;

$aws = Aws::factory(array(
	'key'    => AWS_ACCESS_KEY,
	'secret' => AWS_SECRET_ACCESS_KEY,
	'region' => Region::US_EAST_1,
	'scheme' => 'http'	//https will fail, WTF??!
));

$s3 = $aws->get('s3');*/ //SDK V2
$s3 = new AmazonS3(array(
	'key'    => AWS_ACCESS_KEY,
	'secret' => AWS_SECRET_ACCESS_KEY,
));

$sqs = new AmazonSQS(array(
	'key'    => AWS_ACCESS_KEY,
	'secret' => AWS_SECRET_ACCESS_KEY,
));

try {
	//get file meta data
	//$file_meta = $s3->headObject( array('Bucket'=>AWS_S3_BUCKET, "Key"=>$key) );
	//$file_meta->get('ContentLength')>0
	$file_size = $s3->get_object_filesize(AWS_S3_BUCKET, $key, false);

	//set file content-type
	$file_ext = pb_getFileExt($file_name);
	$content_type = $mime_types[$file_ext];
	if($content_type) {
		$s3->change_content_type(AWS_S3_BUCKET, $key, $content_type);
		// $s3->setDefaultHeaders(array("Content-Type"=> $content_type));
		// $s3->copyObject(array(
		// 		"Bucket"=>AWS_S3_BUCKET, 
		// 		"Key"=>$key, 
		// 		"CopySource"=>urlencode(AWS_S3_BUCKET.'/'.$key), 
		// 		"MetadataDirective"=>"REPLACE"
		// ));
	}

} catch(Exception $e) {
	$ret['msg'] = $e->getMessage();
}