Class S3FileReader

packages/filesystem/s3/rw.ts:8–34

 * 通过 GET 请求下载 S3 对象
 */
export class S3FileReader implements FileReader {
  client: S3Client;

  bucket: string;

  key: string;

  constructor(client: S3Client, bucket: string, key: string) {
    this.client = client;
    this.bucket = bucket;
    this.key = key;
  }

  /**
   * 读取文件内容
   * @param type 输出格式："string" 为文本，"blob" 为二进制（默认）
   * @returns 文件内容
   * @throws {S3Error} 文件不存在或读取失败
   */
  async read(type: "string" | "blob" = "blob"): Promise<string | Blob> {
    const response = await this.client.request("GET", this.bucket, this.key);
    if (type === "string") {
      return response.text();
    }
    return response.blob();
  }
}

/**
 * S3 文件写入器