DigitalScholl/Learun.Framework.Ultimate V7/Learun.Application.WebApi/Modules/AnnexesApiWx.cs

using Learun.Application.Base.SystemModule;
using Learun.Util;
using Nancy;
using System;
using System.Collections.Generic;
using System.IO;

namespace Learun.Application.WebApi.Modules
{
    public class AnnexesApiWx : BaseApi
    {
        public AnnexesApiWx()
            : base("/learun/adms/annexes")
        {
            Get["/wxlist"] = WxGetList;
            Get["/wxdown"] = WxDownload;
            Get["/wxfileinfo"] = WxFileInfo;
            Post["/wxupload"] = WxUpload;
            Post["/wxdelete"] = WxDeleteFile;
            Post["/wxuploadinsingle"] = WxUploadInSingle;
        }
        private AnnexesFileIBLL annexesFileIBLL = new AnnexesFileBLL();

        /// <summary>
        /// 获取附件列表
        /// </summary>
        /// <param name="_"></param>
        /// <returns></returns>
        public Response WxGetList(dynamic _)
        {
            var keyValue = this.GetReqData();
            var list = annexesFileIBLL.GetList(keyValue);

            return Success(list);
        }

        /// <summary>
        /// 上传附件图片文件
        /// <summary>
        /// <returns></returns>
        public Response WxUpload(dynamic _)
        {
            var files = (List<HttpFile>)this.Context.Request.Files;
            string folderId = Request.Form["folderId"];
            string filePath = Config.GetValue("AnnexesFile");
            string uploadDate = DateTime.Now.ToString("yyyyMMdd");
            string fileEextension = Path.GetExtension(files[0].Name);
            string fileType = fileEextension.Replace(".", "");
            string fileGuid = Guid.NewGuid().ToString();

            string virtualPath = string.Format("{0}/{1}/{2}/{3}{4}", filePath, userInfo.userId, uploadDate, fileGuid, fileEextension);

            //创建文件夹
            string path = Path.GetDirectoryName(virtualPath);
            Directory.CreateDirectory(path);
            AnnexesFileEntity fileAnnexesEntity = new AnnexesFileEntity();
            if (!System.IO.File.Exists(virtualPath))
            {
                byte[] bytes = new byte[files[0].Value.Length];
                files[0].Value.Read(bytes, 0, bytes.Length);
                FileInfo file = new FileInfo(virtualPath);
                FileStream fs = file.Create();
                fs.Write(bytes, 0, bytes.Length);
                fs.Close();

                //文件信息写入数据库
                fileAnnexesEntity.F_Id = fileGuid;
                fileAnnexesEntity.F_FileName = files[0].Name;
                fileAnnexesEntity.F_FilePath = virtualPath;
                fileAnnexesEntity.F_FileSize = files[0].Value.Length.ToString();
                fileAnnexesEntity.F_FileExtensions = fileEextension;
                fileAnnexesEntity.F_FileType = fileType;
                fileAnnexesEntity.F_CreateUserId = userInfo.userId;
                fileAnnexesEntity.F_CreateUserName = userInfo.realName;

                annexesFileIBLL.SaveEntity(folderId, fileAnnexesEntity);
            }

            return SuccessString(folderId);
        }

        /// <summary>
        /// 上传附件图片文件【移动端app2.0,单独页面中的附件图片上传使用方法】
        /// <summary>
        /// <returns></returns>
        public Response WxUploadInSingle(dynamic _)
        {
            var files = (List<HttpFile>)this.Context.Request.Files;
            var folderId = this.GetReq<FileModel>().folderId;
            var name = this.GetReq<FileModel>().name;

            string filePath = Config.GetValue("AnnexesFile");
            string uploadDate = DateTime.Now.ToString("yyyyMMdd");
            string FileEextension = Path.GetExtension(name);
            string fileGuid = Guid.NewGuid().ToString();

            string virtualPath = string.Format("{0}/{1}/{2}/{3}{4}", filePath, userInfo.userId, uploadDate, fileGuid, FileEextension);

            //创建文件夹
            string path = Path.GetDirectoryName(virtualPath);
            Directory.CreateDirectory(path);
            AnnexesFileEntity fileAnnexesEntity = new AnnexesFileEntity();
            if (!System.IO.File.Exists(virtualPath))
            {
                byte[] bytes = new byte[files[0].Value.Length];
                files[0].Value.Read(bytes, 0, bytes.Length);
                FileInfo file = new FileInfo(virtualPath);
                FileStream fs = file.Create();
                fs.Write(bytes, 0, bytes.Length);
                fs.Close();

                //文件信息写入数据库
                fileAnnexesEntity.F_Id = fileGuid;
                fileAnnexesEntity.F_FolderId = folderId;
                fileAnnexesEntity.F_FileName = name;
                fileAnnexesEntity.F_FilePath = virtualPath;
                fileAnnexesEntity.F_FileSize = files[0].Value.Length.ToString();
                fileAnnexesEntity.F_FileExtensions = FileEextension;
                fileAnnexesEntity.F_FileType = FileEextension.Replace(".", "");
                fileAnnexesEntity.F_CreateUserId = userInfo.userId;
                fileAnnexesEntity.F_CreateUserName = userInfo.realName;

                annexesFileIBLL.SaveEntity(folderId, fileAnnexesEntity);
            }
            return SuccessString(folderId);
        }

        /// <summary>
        /// 获取文件信息
        /// </summary>
        /// <param name="_"></param>
        /// <returns></returns>
        public Response WxFileInfo(dynamic _)
        {
            var fileId = this.GetReqData();
            var fileEntity = annexesFileIBLL.GetEntity(fileId);

            return Success(fileEntity);
        }

        /// <summary>
        /// 删除文件
        /// </summary>
        /// <param name="_"></param>
        /// <returns></returns>
        public Response WxDeleteFile(dynamic _)
        {
            var fileId = this.GetReqData();
            AnnexesFileEntity fileInfoEntity = annexesFileIBLL.GetEntity(fileId);
            if (fileInfoEntity != null)
            {
                annexesFileIBLL.DeleteEntity(fileId);
                //删除文件
                if (System.IO.File.Exists(fileInfoEntity.F_FilePath))
                {
                    System.IO.File.Delete(fileInfoEntity.F_FilePath);
                }
            }

            return Success("删除成功");
        }

        /// <summary>
        /// 下载文件，微信小程序用
        /// 
        /// 微信小程序可以预览图片、文档
        /// 支持的图片格式：.jpg .png .webp .gif
        /// 支持的文档格式：.doc(x) .xls(x) .ppt(x) .pdf
        /// 
        /// 对于其他格式的文件，微信小程序官方未提供打开或预览的 API，文件对用户来说不可访问
        /// </summary>
        /// <param name="_"></param>
        /// <returns></returns>
        public Response WxDownload(dynamic _)
        {
            string name = this.GetReqData();
            string fileId = name.Split('.')[0];
            var fileEntity = annexesFileIBLL.GetEntity(fileId);
            string filepath = fileEntity.F_FilePath;

            if (!FileDownHelper.FileExists(filepath))
            {
                return 404;
            }

            FileDownHelper.DownLoadWx(filepath, fileEntity.F_FileType);

            return Success("");
        }

        public class FileModel
        {
            public string folderId { get; set; }
            public string name { get; set; }
            public string id { get; set; }
        }
    }
}