namespace AdService.Controller.Controllers
{

    /// <summary>
    /// 采集文件操作接口
    /// </summary>
    public class AdFileController : BaseController
    {

        ILogger logger { get; set; }

        /// <summary>
        /// 下载采集文件
        /// </summary>
        /// <param name="fileName">采集返回的名称</param>
        /// <param name="path">采集返回的文件路径</param>
        /// <returns></returns>
        [HttpGet]
        public IActionResult Download(string path, string fileName)
        {
            if (string.IsNullOrWhiteSpace(fileName))
            {
                return NotFound("必须指定要下载的文件");
            }
            if (fileName.StartsWith("/"))
                fileName = fileName.Substring(1);
            string localFile = Path.Combine(path, fileName);
            try
            {
                if (!System.IO.File.Exists(localFile))
                {
                    return NotFound($"文件[{fileName}]不存在");
                }
                var fileStream = new FileStream(localFile, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite, 4096, true);  //异步读取文件
                return File(fileStream, "application/octet-stream", fileName, true);  //为true时，支持断点续传
            }
            catch (Exception ex)
            {
                logger.LogError($"文件[{localFile}]下载失败", ex);
                return NotFound($"文件[{fileName}]下载失败");
            }
        }


    }
}