檔案上傳到百度雲端硬碟說明文檔

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1. 上傳百度雲端硬碟功能，由於百度開發人員中還沒有開放對.net

操作的SDK，所以我們現在只能使用原生的REST API

 

我們的做法就是如何用C# 語言調用 調用curl 命令。

2. curl是利用URL文法在命令列方式下工作的開源檔案傳輸工具。它被廣泛應用在Unix、多種Linux發行版中，並且有DOS和Win32、Win64下的移植版本.

要操作curl 我們需要引入LibCurlNet.dll

 

3.百度上傳我們需要有百度帳號，而且需要申請開發人員功能進入首頁後會有

AccessKey,Secrectkey 這兩個Key非常重要

4. 傳入參數擷取加密url，下面一部分代碼是把檔案寫入伺服器Temp下的一個臨時檔案。

  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 轉換成 byte[]             byte[] bytes = new byte[stream.Length];            stream.Read(bytes, 0, bytes.Length);            // 設定當前流的位置為流的開始             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();                //刪除臨時檔案                File.Delete(path);                return code.ToString();            }            catch (Exception ex)            {                throw new Exception("Error", ex);            }        }

 

5. 這個代碼就是調用LibCurlNet上傳的代碼。

 

6. 這個是Action代碼調用百度上傳Put後在把這個檔案名稱儲存到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); // 副檔名                        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            {                listInfo.Add(new JsonModel(false, "", "Please select a file upload"));                return Json(listInfo, JsonRequestBehavior.AllowGet);            }        }

6.圖4 中Delete 功能現在只能刪除資料庫中的，而不能刪除 百度雲端硬碟中的，

刪除百度雲中的代碼還不知道怎麼實現，國內的資料太少了。

     //public static bool DELETE(string sobject)        //{        //    string content = Flag + "\n"        //      + "Method=DELETE\n"        //      + "Bucket=" + Bucket + "\n"        //      + "Object=" + sobject + "\n";        //    string signture = Flag + ":" + AccessKey + ":" + HttpUtility.UrlEncode(MyHmac.hmacSha1(content, SecrectKey));        //    string url = "http://bcs.duapp.com/" + Bucket + "/" + HttpUtility.UrlEncode(sobject) + "?sign=" + signture;        //    return HttpClientUtil.doDeleteMethod(url);        //}

上傳百度雲第二中方法

1. 上面我們提調用百度雲介面需要加入libCurlNet.dll,這裡就不需要LibCurlNet.dll

2.百度上傳代碼

     public static string GenerateUri(string method, string sobject)        {            string content = Flag + "\n"                           + "Method=" + method + "\n"                           + "Bucket=" + Bucket + "\n"                           + "Object=" + sobject + "\n";            //+ "Time=" + "\n"            //+ "Ip=" + "\n"            //+ "Size=" + "\n";            string signture = Flag + ":" + AccessKey + ":" + HttpUtility.UrlEncode(MyHmac.hmacSha1(content, SecrectKey));            string uri = "http://bcs.duapp.com/" + Bucket + "/" + HttpUtility.UrlEncode(sobject) + "?sign=" + signture;            return uri;        }

 

  // REST @PUT 方法，帶傳送檔案        public static T doPutMethodToObj<T>(string _Object, string path)        {            string uri = GenerateUri("PUT", _Object);            HttpWebRequest WRequest = (HttpWebRequest)WebRequest.Create(uri);            WRequest.Method = "PUT";            WRequest.ContentType = "application/json;charset=UTF-8";            WRequest.AllowWriteStreamBuffering = false;            //  WRequest.Timeout = 10000;            FileStream ReadIn = new FileStream(path, FileMode.Open, FileAccess.Read);            ReadIn.Seek(0, SeekOrigin.Begin); // Move to the start of the file.            WRequest.ContentLength = ReadIn.Length; // Set the content length header to the size of the file.            Byte[] FileData = new Byte[ReadIn.Length]; // Read the file in 2 KB segments.            int DataRead = 0;            Stream tempStream = WRequest.GetRequestStream();            do            {                if (FileData.Length <= 2048)                    DataRead = ReadIn.Read(FileData, 0, FileData.Length);                else                    DataRead = ReadIn.Read(FileData, 0, 2048);                if (DataRead > 0) //we have data                {                    tempStream.Write(FileData, 0, DataRead);                    // Array.Clear(FileData, 0, FileData.Length); // Clear the array.                }            } while (DataRead > 0);            HttpWebResponse WResponse = (HttpWebResponse)WRequest.GetResponse();            // Read your response data here.            // Close all streams.            ReadIn.Close();            tempStream.Close();            string json = getResponseString(WResponse);            WResponse.Close();            //刪除臨時檔案            File.Delete(path);            return JsonConvert.DeserializeObject<T>(json);        }

2. 刪除百度雲端硬碟的的檔案

  // REST @DELETE 方法        public static string doDeleteMethod(string _Object)        {            string uri = GenerateUri("DELETE", _Object);            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);            request.Method = "DELETE";            request.ContentType = "application/json;charset=UTF-8";            request.UserAgent = "curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3";            request.Accept = "*/*";            request.ContentLength = 0;            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())            {                using (StreamReader reader = new StreamReader(response.GetResponseStream(), System.Text.Encoding.GetEncoding("UTF-8")))                {                    return reader.ReadToEnd();                }            }        }

3. 下載百度雲端硬碟檔案

      public static string GET(string sobject)        {            string uri = GenerateUri("GET", sobject);            string _private = "&response-cache-control=private";            return uri + _private;        }