Object Storage Service:0048-00000105

Problem description

When a standard domain name of Object Storage Service (OSS) is used to access an object from a browser, the browser downloads the object instead of displaying it.

Causes

For buckets created after 15:00:00 on September 30, 2019, OSS adds the following headers to responses when objects with image content types are accessed via the standard domain name:

x-oss-force-download: true
Content-Disposition: attachment

The Content-Disposition: attachment header tells the browser to download the file rather than render it inline.

This behavior applies to objects with the following content types:

• image/jpeg

• image/gif

• image/tiff

• image/png

• image/webp

• image/svg+xml

• image/bmp

• image/x-ms-bmp

• image/x-cmu-raster

• image/exr

• image/x-icon

• image/heic

Examples

A bucket created after 15:00:00 on September 30, 2019, contains apple.jpeg with content type image/jpeg. Accessing this object via the standard domain name returns:

GET /apple.jpeg HTTP/1.1

HTTP/1.1 200 OK
Content-Type: image/jpeg
Content-Disposition: attachment
x-oss-force-download: true

The Content-Disposition: attachment header causes the browser to download the file instead of previewing it.

Solutions

To enable browser-based inline preview, bind a custom domain name to your bucket and access the object via that domain.

For setup instructions, see Map custom domain names.

References

• Map custom domain names