{"record":{"id":"6740626647748c0f","repo":"BoundaryML/baml","slug":"failed-to-download-checksum-file-e","errorCode":null,"errorMessage":"Failed to download checksum file: {e}","messagePattern":"Failed to download checksum file: (.+?)","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"engine/playground-server/src/server.rs","lineNumber":259,"sourceCode":"        Ok(extract_root.to_string_lossy().to_string())\n    }\n}\n\nasync fn verify_sha256_checksum(\n    file_bytes: &[u8],\n    checksum_url: &str,\n    client: &reqwest::Client,\n) -> anyhow::Result<()> {\n    tracing::info!(\"Downloading SHA256 checksum from: {}\", checksum_url);\n\n    // Download the checksum file\n    tracing::info!(\"Downloading checksum file...\");\n    let checksum_resp = client\n        .get(checksum_url)\n        .header(\"User-Agent\", \"baml-playground-server\")\n        .send()\n        .await\n        .map_err(|e| anyhow::anyhow!(\"Failed to download checksum file: {e}\"))?;\n\n    if !checksum_resp.status().is_success() {\n        return Err(anyhow::anyhow!(\n            \"Checksum download failed with status: {}\",\n            checksum_resp.status()\n        ));\n    }\n\n    let checksum_text = checksum_resp.text().await?;\n\n    // Parse the expected checksum (format: \"hash filename\" or just \"hash\")\n    let expected_checksum = checksum_text\n        .split_whitespace()\n        .next()\n        .ok_or_else(|| anyhow::anyhow!(\"Invalid checksum file format\"))?\n        .to_lowercase();\n\n    // Calculate actual checksum","sourceCodeStart":241,"sourceCodeEnd":277,"githubUrl":"https://github.com/BoundaryML/baml/blob/bd85ce9dee1463ff04d27efd20531013a4ff46c1/engine/playground-server/src/server.rs#L241-L277","documentation":"verify_sha256_checksum fetches the checksum file for the web-panel asset; this error wraps a reqwest transport-level failure of that GET request into \"Failed to download checksum file: {e}\". The asset itself may have downloaded fine, but the sidecar checksum file could not be fetched.","triggerScenarios":"client.get(checksum_url).send().await returns Err while calling get_playground_dist -> verify_sha256_checksum: DNS failure, connection reset, TLS handshake error, or timeout on the checksum URL.","commonSituations":"Checksum file hosted at a URL that is blocked or unreachable from the server (firewalls allow the asset CDN but not the checksum host); intermittent network blips; wrong checksum_url configured in release metadata.","solutions":["Test the checksum URL with curl; fix any DNS/firewall/proxy issue specific to that host.","Retry the operation — transport errors are often transient.","If checksums are hosted alongside the asset, ensure the release pipeline uploads the .sha256 file to the same origin as the asset."],"exampleFix":null,"handlingStrategy":"retry","validationCode":"curl -fsS \"$CHECKSUM_URL\" | head -c 64 && echo OK || echo unreachable","typeGuard":null,"tryCatchPattern":"if let Err(e) = get_playground_dist().await {\n    if e.to_string().contains(\"Failed to download checksum file\") { retry_with_backoff(3); }\n}","preventionTips":["Ensure checksum files ship to the same host/origin as the asset.","Allow both hosts through firewalls/proxies.","Treat checksum fetch failures as transient and retry."],"tags":["network","rust","checksum","download"],"backgroundTag":"network-request-failed","analyzedSha":"bd85ce9dee1463ff04d27efd20531013a4ff46c1","analyzedAt":"2026-09-12T03:38:25.718Z","contentChangedAt":"2026-09-12T03:38:25.718Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}