XdCxRhDW/XdCxRhDW.WebApi/Controllers/FileController.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;
using XdCxRhDw.Dto;

namespace XdCxRhDW.WebApi.Controllers
{
    /// <summary>
    /// 检测参估功能相关接口
    /// </summary>
    public class FileController : BaseController
    {
        private readonly string uploadFolder;
        
        /// <summary>
        /// 
        /// </summary>
        public FileController()
        {
            this.uploadFolder = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "wwwroot");
        }

        /// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="file">文件</param>
        /// <returns></returns>
        [HttpPost, SwaggerForm]
        public async Task<AjaxResult<FileUploadResDto>> UploadFileAsync(HttpPostedFileBase httpFile)
        {
            //if (!Request.Content.IsMimeMultipartContent("form-data"))
            //{
            //    return Error<FileDto>("请求数据不是multipart/form-data类型");
            //}
            var provider = new MultipartMemoryStreamProvider();
            await Request.Content.ReadAsMultipartAsync(provider);
            Directory.CreateDirectory(uploadFolder);
            var content = provider.Contents.First();
            var fileName = Guid.NewGuid().ToString() + ".dat";
            var fileData = await content.ReadAsByteArrayAsync();
            FileUploadResDto fileDto = new FileUploadResDto();
            fileDto.FileName = fileName;
            // 将文件保存到本地文件夹中
            var filePath = Path.Combine(uploadFolder, fileName);
            using (var fileStream = new FileStream(filePath, FileMode.Create))
            {
                await fileStream.WriteAsync(fileData, 0, fileData.Length);
            }

            //清除1个小时之前的文件
            _ = Task.Run(() => {

                var files=Directory.EnumerateFiles(uploadFolder);
                foreach (var file in files)
                {
                    FileInfo info=new FileInfo(file);
                    if (info.CreationTime<DateTime.Now.AddHours(-1))
                    {
                        try
                        {
                            info.Delete();
                        }
                        catch
                        {
                        }
                    }
                }
            });
            return Success(fileDto);
        }

        /// <summary>
        /// 文件下载
        /// </summary>
        /// <param name="dto">文件下载参数,值来自文件上传返回的结果</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<AjaxResult<byte[]>> DownloadFileAsync(FileDownloadDto dto)
        {
            string file=Path.Combine(uploadFolder, dto.FileName);
            var data=File.ReadAllBytes(file);
            return Success(data);
        }
    }
}