.NetCore+WebUploader实现大文件分片上传

前台cshtml

@{
    Layout = null;
}



    
    
    
    
    
    
    


    

        只能上传mpg、mpeg、mp4、avi格式的视频文件
        

        

            
选择文件

            开始上传 
        
    

后台代码：

#region 上传视频
        public IActionResult Upload()
        {
            ViewBag.Token = HttpContext.Request.Headers["Authorization"];//获取认证信息，传递给前台，方便Ajax请求时提供
            return View();
        }
        /// 

        /// 上传文件
        /// 
        /// 
        [HttpPost]
        public async Task FileSave()
        {
            var date = Request;
            var files = Request.Form.Files;
            long size = files.Sum(f => f.Length);
            foreach (var formFile in files)
            {
                if (formFile.Length > 0)
                {
                    string fileExt = formFile.FileName.Substring(formFile.FileName.IndexOf('.')); //文件扩展名，不含“.”
                    long fileSize = formFile.Length; //获得文件大小，以字节为单位
                    //string newFileName = Guid.NewGuid().ToString() + "." + fileExt; //随机生成新的文件名
                    string DirPath = Path.Combine(_uploadConfig.TmpPath, Request.Form["guid"]);
                    if (!Directory.Exists(DirPath))
                    {
                        Directory.CreateDirectory(DirPath);
                    }
                    var filePath = DirPath + "/" + Request.Form["chunk"] + fileExt;
                    using (var stream = new FileStream(filePath, FileMode.Create))
                    {
                        await formFile.CopyToAsync(stream);

                    }
                }
            }
            return Ok(new { count = files.Count, size });
        }

        /// 

        /// 合并请求
        /// 
        /// 
        [HttpPost]
        public async Task FileMerge()
        {
            bool ok = false;
            string errmsg = "";
            try
            {
                var temporary = Path.Combine(_uploadConfig.TmpPath, Request.Form["guid"]);//临时文件夹
                string fileName = Request.Form["fileName"];//文件名
                string fileExt = Path.GetExtension(fileName);//获取文件后缀
                var files = Directory.GetFiles(temporary);//获得下面的所有文件
              
                var finalFilePath = Path.Combine(_uploadConfig.UpLoadPath + fileName);//最终的文件名
                //var fs = new FileStream(finalFilePath, FileMode.Create);
                using (var fs = new FileStream(finalFilePath, FileMode.Create))
                {
                    foreach (var part in files.OrderBy(x => x.Length).ThenBy(x => x))
                    {
                        var bytes = System.IO.File.ReadAllBytes(part);
                        await fs.WriteAsync(bytes, 0, bytes.Length);
                        bytes = null;
                        System.IO.File.Delete(part);//删除分块
                    }
                    Directory.Delete(temporary);//删除文件夹
                    ok = true;
                }
            }
            catch (Exception ex)
            {
                ok = false;
                errmsg = ex.Message;
                log4net.Error(errmsg);
            }
            if (ok)
            {
                return Ok(new { success = true, msg = "" });
            }
            else
            {
                return Ok(new { success = false, msg = errmsg }); ;
            }
        }

        #endregion

参考文章：https://www.cnblogs.com/yesu/p/8267131.html