query-registry/dist/utils/fetch-from-registry.esm.js

Query the npm registry for packuments, manifests, packages and download counts

import { npmRegistry, npmRegistryMirrors } from '../data/registries.esm.js';
import { fetch } from './fetch.esm.js';
import { log } from './log.esm.js';

async function fetchFromRegistry({
  endpoint,
  headers,
  query,
  registry = npmRegistry,
  mirrors = npmRegistryMirrors,
  cached
}) {
  const urls = [registry, ...mirrors].map(host => {
    const url = new URL(endpoint, host);
    url.search = query != null ? query : '';
    return url.href;
  });
  let lastError;

  for (const url of urls) {
    try {
      const json = await fetch({
        url,
        headers,
        cached
      });
      return json;
    } catch (err) {
      // Keep last fetch error
      lastError = err;
    }
  }

  log('fetchFromRegistry: cannot retrieve data from registry or mirrors: %O', {
    endpoint,
    headers,
    query,
    registry,
    mirrors,
    lastError
  });
  throw lastError;
}

export { fetchFromRegistry };
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