I’m asking this here because it looks like a very weird feddit.uk specific issue.

If I post a URL for cdn.bsky.app to an image, it shows up fine on the default web UI.

On the app I use (Connect) it only ever shows up as a link.

“But!”, I hear you cry, “surely that’s an app problem?”

You’d think so, and I thought so, but it is only happening on feddit.uk. If I switch to a different account on a different instance, they display as expected. It also doesn’t matter which instance they were originally posted to, as I’ve just seen an image from bsky that I posted on feddit.uk, and that has the same problem.

Any ideas? This has been bugging me for weeks.

cross-posted from: https://feddit.uk/post/24365548

This is a bit odd. From my feddit.uk account (this one) I get the above for posts on !dailybunnies@lemmings.world.

If I log into the account they were posted with (this is my bot) on lemmings.world they display as expected:

If I log back in as myself on feddit.uk website, the images also display as expected (Connect doesn’t seem to want to upload this one, but you’ll see it without logging in at feddit.uk/c/dailybunnies@lemmings.world).

What’s different?

  • Kuro@lemmy.ca
    3·
    6 days ago

    Hello, Connect dev here but I’ll also tag the Thunder dev @darklightxi@lemmy.world as far as I know we’re the two Flutter based front-ends.

    The issue I believe seems to be with how the URI gets parsed for Bluesky. Since the URL path ends with @jpeg?.jpg the uri.path that I get ends up being "/img/feed_fullsize/plain/did:plc:wf7nfy2us3h5gpa7zfettmzl/bafkreidiiq5pzo4dec3o32z4okokwo5vz55ykd5vsm7ltqkxzrfpwnah64@jpeg" instead of the typical some_path/some_image.jpg. So when the code checks if the url is an image it doesn’t find a file extension and reports that this is a link and not an image. The simplified form of what I’m doing app-side is

    List<String> imageFormats = [
    "jpg",
    ...
];
var uri = Uri.parse(url);
var extension = uri.path.split('.').last;
if (imageFormats.contains(extension)) {
    return true;
}
...

    For some instances this is not a problem since they are proxying all image requests which is why it might be happening only on specific instances for you.

    I’ll roll this fix into the next version, which should be rolling out tonight.

    • darklightxi@lemmy.worldEnglish
      1·
      6 days ago

      Hey there, fellow Flutter dev! 👋

      Thanks for tagging me in this and bringing this to my attention! I’ll take a look at this issue on my end as well and apply some fixes to it.

    • flamingos-cant@feddit.ukEnglish
      1·
      6 days ago

      If you don’t mind me asking, but what’s the reason you’re detecting images like this instead of using the MIME type Lemmy indicates (or hell, the one in the Content-Type header from GET’ting the URL)?

    • Chris@feddit.ukOPEnglish
      1·
      6 days ago

      I’m not entirely sure what you did, but that has fixed it - thanks!

  • flamingos-cant@feddit.ukEnglish
    2·
    8 days ago

    It might be the weird format Bluesky uses for image links:

    https://cdn.bsky.app/img/feed_fullsize/plain/did:plc:wf7nfy2us3h5gpa7zfettmzl/bafkreib6k2uwcy52wi654fdfmfqakzqu54m4eq7vi6cwrolwud6yhehihy@jpeg?.jpg

    It show up fine in the API:

    ~> curl https://feddit.uk/api/v3/post?id=26413986 | jq .post_view.post
{
  "id": 26413986,
  "name": "Daily bunny no.2906 is making waves",
  "url": "https://cdn.bsky.app/img/feed_fullsize/plain/did:plc:wf7nfy2us3h5gpa7zfettmzl/bafkreib6k2uwcy52wi654fdfmfqakzqu54m4eq7vi6cwrolwud6yhehihy@jpeg?.jpg",
  "body": "[…]",
  "creator_id": 16021247,
  "community_id": 683956,
  "removed": false,
  "locked": false,
  "published": "2025-03-27T03:33:21.968620Z",
  "deleted": false,
  "nsfw": false,
  "thumbnail_url": "https://cdn.bsky.app/img/feed_fullsize/plain/did:plc:wf7nfy2us3h5gpa7zfettmzl/bafkreib6k2uwcy52wi654fdfmfqakzqu54m4eq7vi6cwrolwud6yhehihy@jpeg?.jpg",
  "ap_id": "https://lemmings.world/post/23311812",
  "local": false,
  "language_id": 37,
  "featured_community": false,
  "featured_local": false,
  "url_content_type": "image/jpeg"
}

    The only difference between us and .ca is they generate a thumbnail_url, while we don’t (I turned that off when Lemmy had thumbnail issues).

    • flamingos-cant@feddit.ukEnglish
      3·
      8 days ago

      Tested some apps I have (I don’t have Connect). In Thunder it show up as a link, in Jeboa and Voyager it shows up as an image like you’d expect.

    • Zip2@feddit.uk
      1·
      8 days ago

      I thought colons aren’t allowed in urls after the protocol and port parts unless they’re url encoded?

          • Chris@feddit.ukOPEnglish
            1·
            8 days ago

            I put that query string in. Without it, it just shows up as a link everywhere. Lemmy doesn’t seem to be able to identify links to images without obvious filenames!

            • Zip2@feddit.uk
              2·
              8 days ago

              Hang on, let me get this straight in my own head:

              1. if you access the community through a web browser all is fine.
              2. if you access it via connect on the Feddit.uk instance it doesn’t work
              3. if you access it via another instance on Connect it’s ok

              Sound right?

              Have you tried a different app? I can see the images via Voyager.

              • Chris@feddit.ukOPEnglish
                1·
                7 days ago

                Correct.

                I haven’t tried another app, but flamingo has tried some (see their comment), and Thunder appears to have the same issue.

  • threelonmusketeers@sh.itjust.worksEnglish
    1·
    8 days ago

    Even when it is displayed “as expected” as you put it, it seems to be displaying a thumbnail preview of the website rather than embedding the image directly. I’m experiencing a similar problem in Thunder.