How to configure the preview behavior when accessing OSS files?

Screening items

Abnormal causes

resolvent

OSS

Use OSS default domain name or transport to accelerate domain name access. For the sake of data transmission security, when the OSS default domain name or transmission acceleration domain name is used to access specific types of files in the bucket created at a time point (for example, the Content Type is text/html, image/jpeg, etc.), the OSS will force the download header to be added in the return header（ x-oss-force-download: true and Content-Disposition: attachment ）。 Standard browser detected Content-Disposition: attachment A forced download instead of a preview occurs when. For the description of the x-oss-ec rule that hits when accessing a specific type of file in a bucket created at a specified time and causing a forced download, see Appendix: x-oss-ec Rules for Forced Download Hits 。

You need to use a custom domain name to access. Before using a custom domain name to access, you need to complete the domain name binding operation. For specific steps, see Bind the custom domain name to the bucket default domain name 。

Content-Type The value of is inconsistent with the actual file type. The browser cannot parse and render the file correctly, and can only treat it as a download file.

Set a reasonable Content Type according to the file type. See How to set Content Type (MIME)? 。

Content-Disposition Is set to attachment 。 Browser detected Content-Disposition: attachment The download behavior is triggered when the.

Set Content Disposition to inline 。 For specific steps, see Manage file metadata 。

CDN

The cache resource was not refreshed.

Refresh CDN cache resources. For specific steps, see Refresh and preheat resources 。

browser

Preview of files in this format, such as table files, text files, presentation files, and pdf files, is not supported.

You can install plug-ins for your browser to support previewing files in this format. Alternatively, you can use the Smart Media Management IMM to preview documents online. For specific steps, see Document online preview 。