Function setCacheEntry

examples/pdf-server/server.ts:744–767

Add data to cache with both inactivity and max lifetime timers

(url: string, data: Uint8Array)

  /** Add data to cache with both inactivity and max lifetime timers */
  function setCacheEntry(url: string, data: Uint8Array): void {
    // Clear any existing entry first
    deleteCacheEntry(url);

    // Evict least-recently-used entries until under the byte cap.
    for (const oldest of cache.keys()) {
      if (totalBytes + data.length <= maxTotalBytes) break;
      deleteCacheEntry(oldest);
    }

    const entry: CacheEntry = {
      data,
      createdAt: Date.now(),
      inactivityTimer: setTimeout(() => {
        deleteCacheEntry(url);
      }, CACHE_INACTIVITY_TIMEOUT_MS),
      maxLifetimeTimer: setTimeout(() => {
        deleteCacheEntry(url);
      }, CACHE_MAX_LIFETIME_MS),
    };

    cache.set(url, entry);
    totalBytes += data.length;
  }

  /** Slice a cached or freshly-fetched full body to the requested range. */
  function sliceToChunk(