Why can't my Qiniu Cloud S3 attachments load in the forum after successful upload?

[pangbo]

If your S3 bucket is private, you need to enable the Secure uploads option, otherwise Discourse will not attempt to sign attachment links.

After changing this setting, you must rebake the post for it to take effect.

Secure Uploads

Added in the Discourse 2.4 release in February is the Secure Uploads feature, which provides a higher degree of security for ALL uploads (images, video, audio, text, pdfs, zips, and others) within a Discourse instance. Prerequisites You must have S3 uploads enabled on your site, which needs the following settings to be filled: S3 access key id S3 secret access key S3 region S3 upload bucket You also must be using an S3 bucket that does not have a Public bucket policy, and you need to make su…