Method resolveHashDescriptor

web/src/artifact_cache.ts:263–292

(
    url: string,
  )

  }

  private async resolveHashDescriptor(
    url: string,
  ): Promise<CrossOriginHashDescriptor | null> {
    const cached = this.hashCache.get(url);
    if (cached) {
      return cached;
    }
    // Check persistent store before falling back to network-based hash extraction.
    // This covers non-LFS files (JSON configs, tokenizers) and non-HuggingFace URLs
    // (e.g. GitHub raw .wasm files) whose hashes were computed from blob content on a
    // previous visit and persisted to the Cache API.
    const persisted = await this.loadPersistedHashEntry(url);
    if (persisted) {
      this.hashCache.set(url, persisted);
      return persisted;
    }
    const hashValue = await this.getFileHash(url);
    if (!hashValue) {
      return null;
    }
    const descriptor: CrossOriginHashDescriptor = {
      algorithm: HASH_ALGORITHM,
      value: hashValue,
    };
    this.hashCache.set(url, descriptor);
    // Persist pointer-derived hashes so subsequent visits skip the LFS pointer
    // network request (especially important for models with many shards).
    await this.persistHashEntry(url, descriptor);
    return descriptor;
  }

  private async getFileHash(url: string): Promise<string | null> {
    if (/\/resolve\//.test(url)) {