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Errors

The driver throws HttpError for non-2xx responses.

Related page: Low-level HTTP client for HttpClient details and NDJSON streaming.

HttpError​

class HttpError extends Error {
  status: number;
  data?: unknown;
}

In tooling and CLIs, you often want to log error.data if available (it may include server error details).

Example: log status + data​

import { HttpError, LioranClient } from "@liorandb/driver";

const client = new LioranClient("http://localhost:4000");

try {
  await client.login("admin", "wrong-password");
} catch (err) {
  if (err instanceof HttpError) {
    console.error("HTTP", err.status, err.data);
  } else {
    console.error(err);
  }
}

Example: handle 401 and re-authenticate​

async function withRetry<T>(fn: () => Promise<T>) {
  try {
    return await fn();
  } catch (err) {
    if (err instanceof HttpError && err.status === 401) {
      await client.login("admin", "admin");
      return await fn();
    }
    throw err;
  }
}

const db = await client.db("default");
const users = db.collection("users");
console.log(await withRetry(() => users.count()));