How do I compress objects that I download from OSS in the GZIP format? - Object Storage Service

When you send a GET request to Object Storage Service (OSS) to download a static object used in web pages, such as an HTML, JavaScript, XML, or JSON object, you can add the Accept-Encoding header to the GET request and set the value of this header to gzip. This way, the object is compressed in the GZIP format before being downloaded.

Prerequisites

The object that you download is equal to or larger than 1 KB in size.
The Content-Type header in the GET request is set to one of the following values: text/cache-manifest, text/xml, text/css, text/html, text/plain, application/javascript, application/x-javascript, application/rss+xml, application/json, or text/json.

Usage notes

After the object is compressed in the GZIP format, the Content-Encoding: gzip header will be included in the response headers of API operations such as GetObject and HeadObject. The ETag, Content-Length and Accept-Ranges fields will not be returned.

Examples

Sample requests

GET /example.txt HTTP/1.1
Host: examplebucket.oss-cn-hangzhou.aliyuncs.com
Accept: */*
Accept-Encoding: gzip

Sample responses

HTTP/1.1 200 OK
Server: AliyunOSS
Date: Tue, 19 Nov 2024 08:38:22 GMT
Content-Type: text/plain
Connection: keep-alive
Vary: Accept-Encoding
x-oss-request-id: **********
Last-Modified: Tue, 19 Nov 2024 06:04:02 GMT
x-oss-object-type: Normal
x-oss-hash-crc64ecma: ********************
x-oss-storage-class: Standard
x-oss-version-id: ***************************************
x-oss-ec: ************
Content-Disposition: attachment
x-oss-force-download: true
Content-MD5: ******************
x-oss-server-time: 35
Content-Encoding: gzip