Middleware/FileProviderMiddleware.cs

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using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.FileProviders;
using Snai.File.FileOperation.Middleware.Entity;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Snai.File.FileOperation.Middleware
{
    public class FileProviderMiddleware
    {
        private readonly RequestDelegate _next;
        private readonly IFileProvider _fileProvider;

        public FileProviderMiddleware(RequestDelegate next, IFileProvider fileProvider)
        {
            _next = next;
            _fileProvider = fileProvider;
        }

        public async Task Invoke(HttpContext context)
        {
            var output = new StringBuilder("");
            //ResolveDirectory(output, "", "");
            ResolveFileInfo(output, "log", ".log");

            await context.Response.WriteAsync(output.ToString());
        }

        //读取目录下所有文件内容
        private void ResolveFileInfo(StringBuilder output, string path, string suffix)
        {
            System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
            Encoding encoding = Encoding.GetEncoding("gb2312");

            output.AppendLine("UserID    Golds    RecordDate");

            IDirectoryContents dir = _fileProvider.GetDirectoryContents(path);
            foreach (IFileInfo item in dir)
            {
                if (item.IsDirectory)
                {
                    ResolveFileInfo(output,
                        item.PhysicalPath.Substring(Directory.GetCurrentDirectory().Length),
                        suffix);
                }
                else
                {
                    if (item.Name.Contains(suffix))
                    {
                        var userList = new List<UserGolds>();
                        var user = new UserGolds();

                        IFileInfo file = _fileProvider.GetFileInfo(path + "\\" + item.Name);

                        using (var stream = file.CreateReadStream())