ibms-dome/FrontendWebApi/ApiControllers/FileController.cs

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using NPOI.SS.Formula.Functions;
using Repository.BackendRepository.Interface;
using Repository.FrontendRepository.Interface;
using System;
using System.Collections.Generic;
using System.IdentityModel.Tokens.Jwt;
using System.IO;
using System.Net;
using System.Web;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http.Features;
using NPOI.HPSF;

namespace FrontendWebApi.ApiControllers
{
    public class FileController : MyBaseApiController<GraphManageController>
    {
        private readonly IBackendRepository backendRepository;
        private readonly IFrontendRepository frontendRepository;

        private string graphManageFileSaveAsPath = "";
        private string operationFileSaveAsPath = "";
        

        public FileController(IBackendRepository backendRepository, IFrontendRepository frontendRepository)
        {
            this.backendRepository = backendRepository;
            this.frontendRepository = frontendRepository;
            graphManageFileSaveAsPath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "upload", "graph_manage");
            operationFileSaveAsPath = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", "upload", "operation");
        }
        public ActionResult Download([FromQuery]string type , string savename)
        {
            var path = "";
            if (type == "graph")
            {
                path = Path.Combine(graphManageFileSaveAsPath, savename);
            }
            else if (type == "operation") 
            {
                path = Path.Combine(operationFileSaveAsPath, savename);
            }

            if (System.IO.File.Exists(path) && path != "")
            {
                try
                {
                    var auth = HttpContext.Request.Headers["Authorization"];
                    var token = auth.ToString()?.Split("Bearer ")[1];
                    var jwt = new JwtSecurityTokenHandler().ReadJwtToken(token);
                    if (jwt == null)
                        return Unauthorized(HttpStatusCode.Unauthorized);
                    else if (!System.IO.File.Exists(path))
                        return NotFound("找不到文件");

                    var bufferingFeature = HttpContext.Features.Get<IHttpResponseBodyFeature>();
                    bufferingFeature?.DisableBuffering();
                    var content = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
                    var response = File(content, "application/octet-stream");//FileStreamResult
                    
                    return response;
                }
                catch (Exception)
                { return null; }

            }
            else
                return null;
        }

        [HttpPost]
        [Route("api/Upload")]
        public ActionResult DroZonUplFile()
        {
            var a = HttpContext.Request.Form.Files;
            return Json(new
            {
                code = "0000",
                data = HttpContext.Request.Form.Files
            });
        }
    }
}