tonhowtf/omniget · error · anyhow::Error

nenhuma pagina baixada; o documento pode exigir assinatura…

Error message

nenhuma pagina baixada; o documento pode exigir assinatura de URL

What it means

calameo::download loops over page numbers fetching each page asset; when the loop ends, if n == 0 not a single page was successfully downloaded. Most commonly this means the per-page URLs require a signed URL (signature/query parameters) that the tool did not produce, so all requests failed or returned non-image responses.

Solutions

1. Open the document in a browser with devtools and copy a working page URL; compare with the constructed URL and add any missing signature query parameters to the URL builder
2. Retry later — temporary CDN auth/token issues may resolve
3. If the document fundamentally requires signed URLs, the document cannot be downloaded anonymously; use an authenticated export path instead

Example fix

// before
let url = format!("{}/page_0001.svg", prefix); // unsigned, 403
// after
let url = format!("{}/page_0001.svg?{}", prefix, signing_params(&doc_id));

// verify a single page URL is fetchable before the full loop
let probe = client.get(format!("{}/page_0001.{format}", prefix)).send().await?;
if !probe.status().is_success() {
    anyhow::bail!("page URLs appear to require a signature");
}

let result = tokio::time::timeout(Duration::from_secs(60), calameo::download(url, dest, progress)).await;
match result {
    Ok(Ok(res)) if res.pages > 0 => res,
    _ => { eprintln!("download failed or produced 0 pages; signed URLs likely required"); Default::default() }
}

When it happens

Trigger: download() extracted a valid page_prefix but every page request returned 403/404 or an error body — the CDN requires per-URL signature/auth that page URL construction lacks.

Common situations: Publisher's Calameo account enforces signed/protected page URLs; CDN auth tokens expired between prefix extraction and download; network/firewall blocking the CDN host.

Understand the failure class

Background: "API error: {status}" and "HTTP 401/403/404/429/5xx" errors: non-2xx HTTP responses explained — this error's family across 27 libraries.

Related errors

• Track sem metadata pra resolver no YouTube
• download de falhou: HTTP
• nao foi possivel buscar
• Failed to open aria2c zip
• Download cancelled

AI-assisted analysis of tonhowtf/omniget@8600b91f42 (2026-09-12). Data as JSON: /api/errors/5e34fa2ade7c3a44. Report an issue: GitHub.

Appendix: source

Thrown at src-tauri/omniget-core/src/core/tools/calameo.rs:77

                svg = bytes.to_vec();
            }
            tokio::fs::write(folder.join(format!("p{:04}.svg", page)), &svg).await?;
            n = page;
            continue;
        }
        let jpg_url = format!("{}p{}.jpg", prefix, page);
        let resp = client.get(&jpg_url).send().await?;
        if resp.status().is_success() {
            format = "jpg".to_string();
            let bytes = resp.bytes().await?;
            tokio::fs::write(folder.join(format!("p{:04}.jpg", page)), &bytes).await?;
            n = page;
            continue;
        }
        break;
    }
    if n == 0 {
        return Err(anyhow!(
            "nenhuma pagina baixada; o documento pode exigir assinatura de URL"
        ));
    }
    if format == "jpg" {
        // com JPEG dá para montar o PDF na hora
        let mut imgs = Vec::new();
        for page in 1..=n {
            imgs.push(tokio::fs::read(folder.join(format!("p{:04}.jpg", page))).await?);
        }
        let pdf = super::jpeg_pdf::build_pdf(&imgs)?;
        tokio::fs::write(folder.with_extension("pdf"), pdf).await?;
    }
    super::report(&progress, &id, "done", n as u64, Some(n as u64), None);
    Ok(CalameoResult {
        title,
        pages: n,
        folder: folder.to_string_lossy().to_string(),
        format,

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