Method getDirectory

js/src/index.ts:683–712

(
    source: Source,
    offset: number,
    length: number,
    header: Header
  )

  }

  async getDirectory(
    source: Source,
    offset: number,
    length: number,
    header: Header
  ): Promise<Entry[]> {
    const cacheKey = `${source.getKey()}|${
      header.etag || ""
    }|${offset}|${length}`;
    const cacheValue = this.cache.get(cacheKey);
    if (cacheValue) {
      cacheValue.lastUsed = this.counter++;
      const data = cacheValue.data;
      return data as Entry[];
    }

    const directory = await getDirectory(
      source,
      this.decompress,
      offset,
      length,
      header
    );
    this.cache.set(cacheKey, {
      lastUsed: this.counter++,
      data: directory,
    });
    this.prune();
    return directory;
  }

  prune() {
    if (this.cache.size > this.maxCacheEntries) {