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

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

import unfetch from 'isomorphic-unfetch';
import lru from 'tiny-lru';
import { FetchError } from './errors.esm.js';
import { log } from './log.esm.js';

const maxItems = 250;
const fiveMinutesTTL = 5 * 60 * 1000;
const cache = /*#__PURE__*/lru(maxItems, fiveMinutesTTL);
async function fetch({
  url,
  headers,
  cached = true
}) {
  const cacheKey = `headers=${JSON.stringify(headers)};url=${url}`;
  const cachedJSON = cache.get(cacheKey);

  if (cached && cachedJSON) {
    log('fetch: returning cached response: %O', {
      cacheKey,
      url,
      cachedJSON
    });
    return cachedJSON;
  }

  const response = await unfetch(url, {
    headers
  });

  if (!response.ok) {
    log('fetch: request failed: %O', {
      url,
      headers,
      status: response.statusText,
      response
    });
    throw new FetchError(url, response);
  }

  const json = await response.json();

  if (cached) {
    cache.set(cacheKey, json);
  }

  log('fetch: returning fresh response: %O', {
    url,
    json
  });
  return json;
}

export { fetch };
//# sourceMappingURL=fetch.esm.js.map