| 46 | } |
| 47 | |
| 48 | async function fetchStatus(url, method, retries = 3) { |
| 49 | for (let attempt = 0; attempt <= retries; attempt++) { |
| 50 | try { |
| 51 | const response = await fetch(url, { |
| 52 | method, |
| 53 | redirect: 'follow', |
| 54 | headers: { |
| 55 | 'User-Agent': 'adcp-owned-link-check/1.0', |
| 56 | }, |
| 57 | signal: AbortSignal.timeout(FETCH_TIMEOUT_MS), |
| 58 | }); |
| 59 | if (response.status >= 500 && attempt < retries) { |
| 60 | await new Promise((r) => setTimeout(r, 2000 * (attempt + 1))); |
| 61 | continue; |
| 62 | } |
| 63 | return response.status; |
| 64 | } catch (err) { |
| 65 | if (attempt < retries) { |
| 66 | await new Promise((r) => setTimeout(r, 2000 * (attempt + 1))); |
| 67 | continue; |
| 68 | } |
| 69 | throw err; |
| 70 | } |
| 71 | } |
| 72 | throw new Error(`fetchStatus exhausted retries without returning for ${url}`); |
| 73 | } |
| 74 | |
| 75 | // 405 means the endpoint exists but rejects this HTTP method (e.g. MCP |
| 76 | // Streamable-HTTP endpoints reject GET). Treat as reachable. |