文件上传到百度云盘说明文档

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1. 上传百度云盘功能，由于百度开发者中还没有开放对.net

操作的SDK，所以我们现在只能使用原生的REST API

我们的做法就是如何用C# 语言调用 调用curl 命令。

2. curl是利用URL语法在命令行方式下工作的开源文件传输工具。它被广泛应用在Unix、多种linux发行版中，并且有DOS和Win32、Win64下的移植版本.

要操作curl 我们需要引入LibCurlNet.dll

3.百度上传我们需要有百度账号，而且需要申请开发者功能进入主页后会有

accessKey,Secrectkey 这两个Key非常重要

4. 传入参数获取加密url，下面一部分代码是把文件写入服务器Temp下的一个临时文件。

  public static string PUT(string sobject, HttpPostedFileBase file)        {            string content = Flag + "/n"           + "Method=PUT/n"           + "Bucket=" + Bucket + "/n"           + "Object=" + sobject + "/n";            //+ "Time=" + "/n"            //+ "ip=" + "/n"            //+ "Size=" + "/n";            string signture = Flag + ":" + AccessKey + ":" + HttpUtility.UrlEncode(MyHmac.hmacSha1(content, SecrectKey));            string url = "http://bcs.duapp.com/" + Bucket + "/" + HttpUtility.UrlEncode(sobject) + "?sign=" + signture;            string path = System.IO.Path.Combine(HttpContext.Current.Server.MapPath("~/Temp"), System.IO.Path.GetFileName(file.FileName));            Stream stream = file.InputStream;            // 把 Stream 转换成 byte[]             byte[] bytes = new byte[stream.Length];            stream.Read(bytes, 0, bytes.Length);            // 设置当前流的位置为流的开始             stream.Seek(0, SeekOrigin.Begin);            FileStream fs = new FileStream(path, FileMode.Create);            BinaryWriter bw = new BinaryWriter(fs);            bw.Write(bytes);            fs.Close();            FileStream fss = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);            try            {                Curl.GlobalInit((int)CURLinitFlag.CURL_GLOBAL_ALL);                Easy easy = new Easy();                Easy.ReadFunction rf = new Easy.ReadFunction(MyHmac.OnReadData);                easy.SetOpt(CURLoption.CURLOPT_READFUNCTION, rf);                easy.SetOpt(CURLoption.CURLOPT_READDATA, fss);                Easy.WriteFunction wf = new Easy.WriteFunction(MyHmac.OnWriteData);                easy.SetOpt(CURLoption.CURLOPT_URL, url);                easy.SetOpt(CURLoption.CURLOPT_UPLOAD, 1);                easy.SetOpt(CURLoption.CURLOPT_INFILESIZE, bytes.LongLength);                easy.SetOpt(CURLoption.CURLOPT_VERBOSE, 1);                easy.SetOpt(CURLoption.CURLOPT_WRITEFUNCTION, wf);                // easy.SetOpt(CURLoption.CURLOPT_WRITEDATA, wf);                Easy.DebugFunction df = new Easy.DebugFunction(MyHmac.OnDebug);                easy.SetOpt(CURLoption.CURLOPT_DEBUGFUNCTION, df);                easy.SetOpt(CURLoption.CURLOPT_VERBOSE, true);                CURLcode code = easy.Perform();                easy.Cleanup();                fss.Close();                Curl.GlobalCleanup();                //删除临时文件                File.Delete(path);                return code.ToString();            }            catch (Exception ex)            {                throw new Exception("Error", ex);            }        }

5. 这个代码就是调用LibCurlNet上传的代码。

6. 这个是Action代码调用百度上传Put后在把这个文件名存储到session中

  public JsonResult UploadFile(HttpPostedFileBase[] fileDataList)        {            List<JsonModel> listInfo = new List<JsonModel>();            if (fileDataList != null)            {                try                {                    foreach (HttpPostedFileBase file in fileDataList)                    {                        string fileExtension = Path.GetExtension(file.FileName); // 文件扩展名                        string sobject = "/newFolder/" + Path.GetFileName(file.FileName);                        string path = System.IO.Path.Combine(Server.MapPath("~/Temp"), System.IO.Path.GetFileName(file.FileName));                        file.SaveAs(path);                        string code = HttpClientUtil.doPutMethodToObj<string>(sobject, path);                        //string code = Crul.PUT(sobject, file);                        if (code == null)                        {                            viewModel = (MaterialsViewModel)Session["MaterialsViewModel"];                            ObjectFiles of = new ObjectFiles();                            of.ObjectType = "Material";                            if (".bmp,.jpg,.tiff,.gif,.pcx,.tga,.exif,.fpx,.svg,.PSD,.cdr,.pcd,.dxf,.ufo,.eps,.ai,.raw".Contains(fileExtension))                            { of.IsPic = true; }                            else { of.IsPic = false; }                            of.ObjectId = "M001";//Temp 值                            of.FieldValue = sobject;                            int recNo = -1;                            if (viewModel.picturesList.Count > 0)                            {                                recNo = (viewModel.picturesList.Count + 1) * -1;                            }                            of.RecNo = recNo;                            viewModel.picturesList.Add(of);                            Session["MaterialsViewModel"] = viewModel;                            listInfo.Add(new JsonModel(true, file.FileName, "Uploaded successfully"));                        }                        else                        {                            listInfo.Add(new JsonModel(false, file.FileName, code));                        }                    }                    return Json(listInfo, JsonRequestBehavior.AllowGet);                }                catch (Exception ex)                {                    listInfo.Add(new JsonModel(false, "", ex.Message));                    return Json(listInfo, JsonRequestBehavior.AllowGet);                }            }            else