Winsoft.GOV/Winsoft.GOV.XF.WebApi.WXCore/Services/ImagesService.cs

using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Winsoft.GOV.XF.WebApi.WXCore.Data;
using Winsoft.GOV.XF.WebApi.WXCore.Models;

namespace Winsoft.GOV.XF.WebApi.WXCore.Services
{
    public class ImagesService : BaseService
    {
        string[] AllowedFileExtensions = new string[] { "jpg", "gif", "png", "jpeg" };
        public ImagesService(XFDbContext context, ILoggerFactory loggerFactory):base(context, loggerFactory)
        {
        
        }

        public bool SaveToDisk(Asset a)
        {
            Match m = Regex.Match(a.Data, @"data:image/(\S+);base64,");
            if (!m.Success)
                return false;
            string exName = m.Groups[1].Value;
            if (!AllowedFileExtensions.Contains(exName))
                return false;
            string base64Str = Regex.Replace(a.Data, @"data:image/(\S+);base64,", "");
            byte[] bt = Convert.FromBase64String(base64Str);
            string filename = DateTime.Now.ToString("yyyyMMddHHmmssfff.") + exName;
            string diskPath = "";
            string absPath = "";
            GetUploadPath(out diskPath, out absPath);
            File.WriteAllBytes(diskPath + "/" + filename, bt);
            a.Data = JsonConvert.SerializeObject(new { src = absPath + "/" + filename });
            return true;
        }

        void GetUploadPath(out string diskPath, out string absPath)
        {
            string upload_path = Directory.GetCurrentDirectory() + "/wwwroot";
            DateTime now = DateTime.Now;
            if (Directory.Exists(upload_path + "/images/" + now.Year) == false)//如果不存在就创建file文件夹
            {
                Directory.CreateDirectory(upload_path + "/images/" + now.Year);
            }
            if (Directory.Exists(upload_path + "/images/" + now.Year + "/" + now.ToString("MMdd")) == false)//如果不存在就创建file文件夹
            {
                Directory.CreateDirectory(upload_path + "/images/" + now.Year + "/" + now.ToString("MMdd"));
            }
            diskPath = upload_path + "/images/" + now.Year + "/" + now.ToString("MMdd");
            absPath = "/images/" + now.Year + "/" + now.ToString("MMdd");
        }
    }
}