What causes "Unsupported media type for download" in tonhowtf/omniget?

Route the MediaInfo to the platform downloader that produced it, not the Bluesky one.

Unsupported media type for download

Error message

Unsupported media type for download

What it means

Catch-all in BlueskyDownloader::download for MediaType variants other than Video, Photo, Carousel, Gif, and the ytdlp-formatted early path (e.g. MediaType::Audio or any other variant). The Bluesky downloader simply cannot download that media type.

Solutions

Route the MediaInfo to the platform downloader that produced it, not the Bluesky one.
Check info.media_type before calling download() and handle unsupported kinds in the caller.
If you added a MediaType variant, extend this match to handle or explicitly reject it.

Example fix

// before
match info.media_type { ... _ => Err(anyhow!("Unsupported media type for download")) }
// after (caller)
if !matches!(info.media_type, MediaType::Video | MediaType::Photo | MediaType::Carousel | MediaType::Gif) {
    return Err(anyhow!("bluesky downloader cannot handle {:?}", info.media_type));
}

Defensive patterns

Strategy: type-guard

Validate before calling

use MediaType::*;
if !matches!(info.media_type, Video | Photo | Carousel | Gif) {
    return Err(anyhow!("{:?} not supported by bluesky downloader", info.media_type));
}

Type guard

fn is_bluesky_downloadable(mt: &MediaType) -> bool {
    matches!(mt, MediaType::Video | MediaType::Photo | MediaType::Carousel | MediaType::Gif)
}

Try / catch

match downloader.download(&info, &opts, tx).await {
    Err(e) if e.to_string() == "Unsupported media type for download" => {
        eprintln!("route {:?} to its originating platform downloader", info.media_type);
    }
    other => other,
}

Prevention

Only pass Bluesky-produced MediaInfo to the Bluesky downloader
Check media_type before dispatching to a platform downloader
Update the match when adding new MediaType variants (make it exhaustive instead of _)

When it happens

Trigger: Calling download() with a MediaInfo whose media_type is a variant the Bluesky platform does not implement (e.g. Audio, or any future variants added to MediaType).

Common situations: Piping MediaInfo produced by another platform downloader into the Bluesky downloader, or code that adds a new MediaType variant without updating this match.

Understand the failure class

Background: UnsupportedOperationException and "is not supported" errors: when a library deliberately refuses a call — this error's family across 30 libraries.

Related errors

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/27046e999c4aef2a. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/platforms/bluesky.rs:379

                let output = opts.output_dir.join(&filename);

                let bytes = direct_downloader::download_direct(
                    &self.client,
                    gif_url,
                    &output,
                    progress,
                    Some(&opts.cancel_token),
                )
                .await?;

                Ok(DownloadResult {
                    file_path: output,
                    file_size_bytes: bytes,
                    duration_seconds: 0.0,
                    torrent_id: None,
                })
            }
            _ => Err(anyhow!("Unsupported media type for download")),
        }
    }
}

View on GitHub (pinned to 8600b91f42)