everlight.eap/backend/DllEapBll/Controllers/AttachmentController.cs

using Cksoft.Unity;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using System;
using System.IO;
using System.Threading.Tasks;

namespace DllEapBll.Controllers
{
    /// <summary>
    /// 附件服务
    /// </summary>
    [Route("eap/api/[controller]/[action]")]
    [Authorize]
    [ApiController]
    public class AttachmentController : ControllerBase
    {
        private readonly IHostingEnvironment _hostingEnvironment;

        /// <summary>
        /// 
        /// </summary>
        /// <param name="hostingEnvironment"></param>
        public AttachmentController(IHostingEnvironment hostingEnvironment)
        {
            _hostingEnvironment = hostingEnvironment;
        }

        /// <summary>
        /// 上传
        /// </summary>
        /// <returns></returns>
        [HttpPost]
        public async Task<EapResponse> Upload()
        {
            var request = Request;
            var file = request.Form.Files["file"];
            var dateNow = DateTime.Now;
            var extension = this.GetFileAExtension(file.FileName);
            var fileNewName = Guid.NewGuid().ToString() + "." + extension;
            Stream stream = new MemoryStream();
            try
            {
                string path = $"/Upload/{dateNow.Year}/{dateNow.Month}/{dateNow.Day}/";
                string phyicPath = _hostingEnvironment.WebRootPath + path;
                string savedPath = phyicPath + fileNewName;
                this.CreateDirectory(phyicPath);
                stream = file.OpenReadStream();
                byte[] bs = new byte[stream.Length];
                stream.Read(bs, 0, bs.Length);
                FileStream fs = new FileStream(savedPath, FileMode.CreateNew);
                fs.Write(bs, 0, bs.Length);
                await Task.CompletedTask;
                return new EapResponse()
                {
                    Code = 1,
                    Msg = path + fileNewName,
                };
            }
            catch (Exception e)
            {
                return new EapResponse
                {
                    Code = -1,
                    Msg = e.Message
                };
            }
            finally
            {
                stream.Close();
            }
        }

        private void CreateDirectory(string path)
        {
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }
        }

        private string GetFileAExtension(string fileName)
        {
            var arr = fileName.Split(new char[] { '.' }, StringSplitOptions.RemoveEmptyEntries);
            if (arr == null || arr.Length <= 0)
            {
                return null;
            }
            return arr[arr.Length - 1];
        }
    }
}