"Unable to generate a preview for this web page because the following oEmbed / OpenGraph tags could not be found: description, image"

[rahim123]

Hi there, I’m trying to figure out why .webp images aren’t being oneboxed on my instance, whereas they do work here on Discourse Meta. For example, this one:

On my instance it throws an error in the preview:

“Sorry, we were unable to generate a preview for this web page, because the following oEmbed / OpenGraph tags could not be found: description, image”

I don’t care so much about the preview, but it is a problem that it’s only generating a link to the image and not actually displaying it. I don’t understand why it works here and on other Discourse forums I use, but not on mine. The only relevant setting I can find is:
authorized extensions = jpg, jpeg, png, gif, webp, pdf

[Lilly (Lillian)]

Hmmm that looks like this:

Onebox can not show preview for url with og metadatas

Hi, I’ve managed setup a discourse instance with discourse_docker, with version 2.7.0.beta4. I’m facing a curious problem that with the same url it did generated onebox preview, however it fails several days later. the url in problem is Dapr可视化指南-InfoQ The error prints as below. [20210309141516] But I can find “og:description” and “og:image” in this url meta tags. I’m not familiar with discourse code, any help will be appreciated, thanks!

[rahim123]

Hmm interesting, thanks. It looks like the same symptoms, but I don’t think it’s the same cause. I’m not using a proxy, and at any rate all the .webp links I’ve tried work here but the same ones fail on my forum.

[Moin]

When did you update your discourse version? There was a fix yesterday

Remote webp images not rendering

Good catch! Made a fix for it in

[rahim123]

Wow, what a coincidence! I was about a 7 or 10 days behind the latest commits. I just updated, and all of the new images I’ve tested seem to work:

https://www.gstatic.com/webp/gallery/4.sm.webp

https://filesamples.com/samples/image/webp/sample1.webp

https://www.gstatic.com/webp/gallery/1.sm.webp

However the URLs that I tried previously seem to be cached or something, because they’re still giving the same error.

[Falco]

@rahim123

However the URLs that I tried previously seem to be cached or something, because they’re still giving the same error.

You will need to rebake old posts with those links for it to onebox.

[rahim123]

Hmm, no, I mean trying to create new posts with those same URLs I was testing before are throwing the same error.