tonhowtf/omniget · error

Could not extract post ID

Error message

Could not extract post ID

What it means

After resolving the input URL to a canonical Reddit post URL, native_get_media_info calls extract_post_id; if the canonical URL does not match the expected post-ID patterns, it returns None and this anyhow error is thrown, stopping all downstream media extraction.

Solutions

1. Validate the URL matches a /comments/{id} or /comments/{slug}/{id} pattern before calling the API.
2. Confirm short/share links (v.redd.it, reddit.com/s/xxx) resolve successfully — check network and redirects.
3. Log the canonical URL when this error occurs to see what resolve_to_canonical produced.
4. Update extract_post_id's regex if Reddit changed permalink formats (e.g. new URL schemes).

Example fix

// caller-side pre-validation
fn looks_like_reddit_post(url: &str) -> bool {
    url.contains("/comments/") || url.contains("v.redd.it")
}
if !looks_like_reddit_post(&user_url) {
    return Err(anyhow!("Not a Reddit post URL: {}", user_url));
}

fn is_reddit_post_url(url: &str) -> bool {
    let u = url.trim();
    u.contains("/comments/")
        || u.contains("redd.it/")
        || regex::Regex::new(r"reddit\.com/(?:r/\w+/)?comments/[a-z0-9]{5,}")
            .unwrap()
            .is_match(u)
}

match native_get_media_info(url).await {
    Err(e) if e.to_string() == "Could not extract post ID" => {
        show_user("This doesn't look like a Reddit post URL");
    }
    other => other,
}

When it happens

Trigger: resolve_to_canonical returns a URL whose path does not contain a recognizable post ID — e.g. a short link that failed to resolve, a gallery/comment permalink with an unexpected shape, or a non-post Reddit URL (subreddit, user page).

Common situations: Users paste subreddit/user/gallery URLs or share links (reddit.com/s/...) that canonicalization cannot turn into /comments/{id}/ form, or Reddit changes its URL structure.

Understand the failure class

Background: "Invalid URL" errors: why new URL(), URI.parse, and reqwest::Url reject your string — missing scheme, whitespace, and bad path format — this error's family across 39 libraries.

Related errors

• não reconheci um vídeo do Bilibili em
• Failed to detect URL kind
• Could not extract pin ID
• Expected a JSON array of cookie objects.
• cor inválida

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/16ad75cf4cdb2c75. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/platforms/reddit.rs:415

            }
        }

        self.native_download(info, opts, progress).await
    }
}

impl RedditDownloader {
    async fn fallback_ytdlp(&self, url: &str) -> anyhow::Result<MediaInfo> {
        let ytdlp_path = crate::core::ytdlp::ensure_ytdlp().await?;
        let json = crate::core::ytdlp::get_video_info(&ytdlp_path, url, &[]).await?;
        crate::platforms::generic_ytdlp::GenericYtdlpDownloader::parse_video_info(&json)
    }

    async fn native_get_media_info(&self, url: &str) -> anyhow::Result<MediaInfo> {
        let canonical = self.resolve_to_canonical(url).await?;

        let post_id = Self::extract_post_id(&canonical)
            .ok_or_else(|| anyhow!("Could not extract post ID"))?;

        let subreddit = Self::extract_subreddit(&canonical).unwrap_or_default();

        let data = self.fetch_post_data(&post_id).await?;

        let media = Self::parse_media(&data).ok_or_else(|| anyhow!("No media found in post"))?;

        let source_id = if subreddit.is_empty() {
            post_id.clone()
        } else {
            format!("{}_{}", subreddit.to_lowercase(), post_id)
        };

        let title = format!("reddit_{}", source_id);

        match media {
            RedditMedia::Video {
                video_url,

View on GitHub (pinned to 8600b91f42)