C# private Upload DownLoad File

私人記錄代碼

 try
                {
                    int pid = int.Parse(request.QueryString["pid"]);
                    int fid = int.Parse(request.QueryString["fid"]);
                    m_log.Debug(string.Format("Download PackageID={0}-------------------------FileID={1}", pid, fid));
                    FileDB fdb = new FileDB();
                    PackageDB pdb = new PackageDB();
                    StorageDB sdb = new StorageDB();

  
                    Storage storage = sdb.GetStorageByID(package.StorageID);
                    int index = pid / 2000;
                    string fullPath = string.Format("{0}\\Data{1}\\{2}\\{3}", storage.RootPath, index, package.DBID, fileinfo.Path);
                    if (System.IO.File.Exists(fullPath))
                    {
                        FileStream fs = new FileStream(fullPath, FileMode.Open, FileAccess.Read, FileShare.Read);
                        long total = fs.Length;
                        string str = request.Headers.Get("Range");
                        int start = str.IndexOf('=');
                        str = str.Substring(start + 1, str.Length - start - 2);
                        long len = long.Parse(str);
                        fs.Seek(len, SeekOrigin.Begin);
                        long left = total - len;
                        long datalen = Math.Min(1024 * 1024, left);
                        byte[] data = new byte[datalen];
                        int size = fs.Read(data, 0, data.Length);
                        fs.Close();
                        fs.Dispose();
                        response.ContentType = "application/octet-stream";
                        response.Headers.Add("Total-Length", total.ToString());
                        response.BinaryWrite(data);
                    }
                    else
                    {
                        m_log.Error(string.Format("Download file {0} not exist fid={1}", fullPath, fid.ToString()));
                    }

        public bool Upload(FileAddRet arg, int pid, string filefullpath, Address adr, WaitHandle[] handlers)
        {
            string address = string.Format("http://{0}:{1}/Upload", adr.ServerName, adr.Port);
            // 要上傳的文件 
            FileStream fs = new FileStream(filefullpath, FileMode.Open, FileAccess.Read);
            long total = fs.Length;
            fs.Seek(arg.CurrentSize, SeekOrigin.Begin);
            long offset = arg.CurrentSize;
            //時間戳 
            string strBoundary = "----------" + DateTime.Now.Ticks.ToString("x");
            byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + strBoundary + "\r\n");
            //請求頭部信息 
            StringBuilder sb = new StringBuilder();
            sb.Append("--");
            sb.Append(strBoundary);
            sb.Append("\r\n");
            sb.Append("Content-Disposition: form-data; name=\"");
            sb.Append("file");
            sb.Append("\"; filename=\"");
            sb.Append(string.Format("{0}_{1}", pid, arg.ID));
            sb.Append("\"");
            sb.Append("\r\n");
            sb.Append("Content-Type: ");
            sb.Append("application/octet-stream");
            sb.Append("\r\n");
            sb.Append("\r\n");
            string strPostHeader = sb.ToString();
            byte[] postHeaderBytes = Encoding.UTF8.GetBytes(strPostHeader);
            byte[] buffer = new byte[m_bufferLength];
            int size = fs.Read(buffer, 0, m_bufferLength);
            while (size > 0 && WaitHandle.WaitAny(handlers, 0) == WaitHandle.WaitTimeout)
            {
                // 根據uri建立HttpWebRequest對象 
                HttpWebRequest httpReq = (HttpWebRequest)WebRequest.Create(new Uri(address));
                //用於聯繫intnert資源的請求方式、默認GET
                httpReq.Method = "POST"; 
                httpReq.ProtocolVersion = HttpVersion.Version10;
                //對發送的數據不使用緩存 
                httpReq.AllowWriteStreamBuffering = false;
                //設置得到響應的超時時間（300秒） 
                httpReq.Timeout = 30000;
                httpReq.ContentType = "multipart/form-data; boundary=" + strBoundary;
                long length = size + postHeaderBytes.Length + boundaryBytes.Length;
                long fileLength = fs.Length;
                httpReq.ContentLength = length;
                Stream postStream = httpReq.GetRequestStream();
                postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
                postStream.Write(buffer, 0, size);
                postStream.Write(boundaryBytes, 0, boundaryBytes.Length);
                postStream.Close();
                offset += size;
                size = fs.Read(buffer, 0, m_bufferLength);
                //獲取服務器端的響應 
                HttpWebResponse Respon = (HttpWebResponse)httpReq.GetResponse();
                Stream st = Respon.GetResponseStream();
                StreamReader str = new StreamReader(st);
                //讀取服務器端返回的消息 
                String ReturnString = str.ReadLine();
                m_log.Debug(ReturnString + filefullpath); //發送完成debug
                st.Close();
                str.Close();
                //傳輸進度事件
                int progress = (int)((double)offset / (double)total * 100);
                NoticeUploadProgress(progress);
            }
            fs.Close();
            fs.Dispose();
            if (size > 0)
                return false;
            else
                return true;
        }
        public bool Download(int pid, int fid, string filefullpath, Address adr, WaitHandle[] handlers)
        {
            try
            {
                m_log.Debug(string.Format("Download pid={0}, fid={1}, local path={2}", pid, fid, filefullpath));
                string address = string.Format("http://{0}:{1}/Download?pid={2}&fid={3}", adr.ServerName, adr.Port, pid, fid);
                string fileDirectory = Path.GetDirectoryName(filefullpath);
                if (!Directory.Exists(fileDirectory))
                {
                    Directory.CreateDirectory(fileDirectory);
                }
                long current = 0;
                long totalLength = 0;
                while (WaitHandle.WaitAny(handlers, 0) == WaitHandle.WaitTimeout)
                {
                    using (FileStream fs = new FileStream(filefullpath, FileMode.Append, FileAccess.Write, FileShare.None, 1048576, FileOptions.WriteThrough))
                    {
                        totalLength = fs.Length;

                        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(new Uri(address));
                        request.ProtocolVersion = HttpVersion.Version10;
                        request.Timeout = 30000;
                        request.AddRange((int)fs.Length);
                        //m_log.Debug("addrange len=" + fs.Length.ToString());
                        Stream ns = request.GetResponse().GetResponseStream();
                        //m_log.Debug("GetResponse");
                        long contentLength = request.GetResponse().ContentLength;
                        //m_log.Debug("contentlen=" + contentLength.ToString());
                        //long contentLength = long.Parse(request.GetResponse().Headers.Get("Content-Length"));
                        if (contentLength == 0)
                        {
                            //m_log.Debug("contentlen=0 return");
                            current = fs.Length;
                            break;
                        }
                        totalLength = long.Parse(request.GetResponse().Headers.Get("Total-Length"));
                        //m_log.Debug("totallen=" + totalLength);
                        byte[] buffer = new byte[contentLength];
                        int length = ns.Read(buffer, 0, buffer.Length);
                        //m_log.Debug("write file len=" + length.ToString());
                        while (length > 0)
                        {
                            fs.Write(buffer, 0, length);
                            fs.Flush();
                            length = ns.Read(buffer, 0, buffer.Length);
                            //m_log.Debug("write");
                        }
                        //m_log.Debug("write done");
                        current = fs.Length;
                        fs.Close();
                        ns.Close();
                        int progress = (int)((double)current / (double)totalLength * 100);
                        NoticeDownloadProgress(progress);
                    }
                }
                if (current < totalLength)
                {
                    //m_log.Debug("current <totalLength return false");
                    return false;
                }
                else
                {
                    //m_log.Debug("down finish");
                    return true;
                }
            }
            catch (Exception ex)
            {
                m_log.Error(ex);
                return false;
            }
        }