Help Center/Object Storage Service/PHP SDK Developer Guide (Ally Region)/Object Download/Rewriting Response Headers
Updated on 2026-01-16 GMT+08:00
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Rewriting Response Headers

When downloading an object, you can rewrite some HTTP/HTTPS response headers. The following table lists rewritable response headers.

Parameter

Description

ResponseContentType

Rewrites Content-Type in HTTP/HTTPS responses.

ResponseContentLanguage

Rewrites Content-Language in HTTP/HTTPS responses.

ResponseExpires

Rewrites Expires in HTTP/HTTPS responses.

ResponseCacheControl

Rewrites Cache-Control in HTTP/HTTPS responses.

ResponseContentDisposition

Rewrites Content-Disposition in HTTP/HTTPS responses.

ResponseContentEncoding

Rewrites Content-Encoding in HTTP/HTTPS responses.

Sample code: 
// Import the dependency library.
require 'vendor/autoload.php';
// Import the SDK code library during source code installation.
// require 'obs-autoloader.php';
// Declare the namespace.
use Obs\ObsClient;
// Create an instance of ObsClient.
$obsClient = new ObsClient ( [ 
      //Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
      //Obtain an AK/SK pair on the management console.
      'key' => getenv('ACCESS_KEY_ID'),
      'secret' => getenv('SECRET_ACCESS_KEY'),
      'endpoint' => 'https://your-endpoint',
      'signature' => 'obs'
] );

$resp = $obsClient -> getObject([
       'Bucket' => 'bucketname',
       'Key' => 'objectname',
       'ResponseContentType' => 'image/jpeg'
]);

printf("RequestId:%s\n", $resp['RequestId']);
// Obtain the rewritten response headers.
printf("ContentType:%s\n", $resp['ContentType']);
Parent topic:Object Download