public bool Add(string guId, DownLoadFileOoj_Server obj)
{
DownLoadFileOoj_Server value = null;
if (ServerDownLoadFilesDic.TryGetValue(guId, out value))
{
return ServerDownLoadFilesDic.TryUpdate(guId, obj, value);
}
else
{
return ServerDownLoadFilesDic.TryAdd(guId, obj);
}
}
public bool Get(string guId, out DownLoadFileOoj_Server obj)
{
return ServerDownLoadFilesDic.TryGetValue(guId, out obj);
}
public bool Remove(string guId, out DownLoadFileOoj_Server obj)
{
return ServerDownLoadFilesDic.TryRemove(guId, out obj);
}
//删除下载文件队列对应的文件Id,会话异常则返回"Session Error";
public string DeleteServerFileId(string DownFileId, string UserID, string PCClientCookieStr)
{
if (SessionCookie.CheckPCClientCookieStr(UserID, PCClientCookieStr))
{
DownLoadFileOoj_Server fileObj = new DownLoadFileOoj_Server();
bool bResult = DownLoadFilesQueue.Instance.Remove(DownFileId, out fileObj);
return Newtonsoft.Json.JsonConvert.SerializeObject(bResult);
}
else
{
return "Session Error";
}
}
public void SafeReadFile(Stream stream, string guId, string FileName,string path)
{
//文件数据块编号
int _order_Num = 0;
//初始化一个32k的缓存
byte[] buffer = new byte[32768];
int read = 0;
int block;
//每次从流中读取缓存大小的数据，知道读取完所有的流为止
DownLoadFileOoj_Server fileObj0 = new DownLoadFileOoj_Server();
DownLoadFilesQueue.Instance.Get(guId, out fileObj0);
fileObj0.ReadStatus = GetFileReadStatus.Reading;
DownLoadFilesQueue.Instance.Add(guId, fileObj0);
while ((block = stream.Read(buffer, 0, buffer.Length)) > 0)
{
//重新设定读取位置
read += block;
//检查是否到达了缓存的边界，检查是否还有可以读取的信息
if (block == buffer.Length)
{
//压入文件块传输缓存队列
DownLoadFileDataObj fileBlock = new DownLoadFileDataObj();
fileBlock.guId = guId;
Array.Copy(buffer, fileBlock.FileData, buffer.Length);
fileBlock.serverDir = path;
fileBlock.Order_Num = _order_Num;
DownLoadFilesBlocksQueue.Instance.Add(fileBlock);
DownLoadFilesQueue.Instance.Get(guId, out fileObj0);
fileObj0.ReadSize = fileObj0.ReadSize + block;
fileObj0.ReadStatus = GetFileReadStatus.Reading;
DownLoadFilesQueue.Instance.Add(guId, fileObj0);
// 尝试读取一个字节
int nextByte = stream.ReadByte();
// 读取失败则说明读取完成可以返回结果
if (nextByte == -1)
{
fileBlock.EndFlag = true;
}
else
{
fileBlock.EndFlag = false;
}
stream.Seek(-1, SeekOrigin.Current);
_order_Num = _order_Num + 1;
//清空缓存区
Array.Clear(buffer, 0, buffer.Length);
}
}
//压入文件块传输缓存队列
DownLoadFileDataObj fileBlockEnd = new DownLoadFileDataObj();
fileBlockEnd.guId = guId;
Array.Copy(buffer, fileBlockEnd.FileData, buffer.Length);
fileBlockEnd.serverDir = path;
fileBlockEnd.Order_Num = _order_Num;
fileBlockEnd.EndFlag = true;
DownLoadFilesBlocksQueue.Instance.Add(fileBlockEnd);
//更新Files队列中，对应File的ReadSize
DownLoadFilesQueue.Instance.Get(guId, out fileObj0);
fileObj0.ReadSize = fileObj0.ReadSize + fileBlockEnd.FileData.Length;
fileObj0.ReadStatus = GetFileReadStatus.ReadEnd;
DownLoadFilesQueue.Instance.Add(guId, fileObj0);
//清空缓存区
Array.Clear(buffer, 0, buffer.Length);
}
//ThreadMethod如下:
public void ThreadMethod(object ParObject)
{
FileThreadPramObj o = (FileThreadPramObj)ParObject;
DownLoadFileOoj_Server fileObj0 = new DownLoadFileOoj_Server();
DownLoadFilesQueue.Instance.Get(o.guId, out fileObj0);
//文件数据块编号
int bufferLength = 32768;
int _order_Num = 0;
//初始化一个32k的缓存
byte[] buffer = new byte[bufferLength];
int read = 0;
int block;
int byteLength = 0;
//每次从流中读取缓存大小的数据，知道读取完所有的流为止
fileObj0.ReadStatus = GetFileReadStatus.StartRead;
DownLoadFilesQueue.Instance.Add(o.guId, fileObj0);
string fileFullPath = Path.Combine(FilesBlocksQueue.Instance.SavePath + fileObj0.serverDir, fileObj0.FileName);//合并路径生成文件存放路径
using (FileStream stream = new FileStream(fileFullPath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
while ((block = stream.Read(buffer, 0, buffer.Length)) > 0)
{
byteLength = byteLength + block;
//重新设定读取位置
read += block;
_order_Num = _order_Num + 1;
//检查是否到达了缓存的边界，检查是否还有可以读取的信息
if (block == buffer.Length)
{
DownLoadFilesQueue.Instance.Get(o.guId, out fileObj0);
//压入文件块传输缓存队列
DownLoadFileDataObj fileBlock = new DownLoadFileDataObj();
fileBlock.guId = o.guId;
Array.Copy(buffer, fileBlock.FileData, buffer.Length);
fileBlock.serverDir = fileObj0.serverDir;
fileBlock.Order_Num = _order_Num;
fileBlock.FileName = fileObj0.FileName;
fileBlock.CanReadLength = bufferLength;
fileObj0.ReadSize = fileObj0.ReadSize + block;
fileObj0.ReadStatus = GetFileReadStatus.Reading;
// 尝试读取一个字节
int nextByte = stream.ReadByte();
// 读取失败则说明读取完成可以返回结果
if (nextByte == -1)
{
fileBlock.EndFlag = true;
}
else
{
fileBlock.EndFlag = false;
}
DownLoadFilesBlocksQueue.Instance.Add(fileBlock);
//Utility.Log.Log.writeLineToLog("发送文件读取文件块：" + fileBlock.Order_Num.ToString(), "DownLoadRead");
DownLoadFilesQueue.Instance.Add(o.guId, fileObj0);
stream.Seek(-1, SeekOrigin.Current);
//清空缓存区
Array.Clear(buffer, 0, buffer.Length);
byteLength = 0;
}
}
//压入文件块传输缓存队列
DownLoadFileDataObj fileBlockEnd = new DownLoadFileDataObj();
fileBlockEnd.guId = o.guId;
Array.Copy(buffer, fileBlockEnd.FileData, byteLength);
fileBlockEnd.serverDir = fileObj0.serverDir;
fileBlockEnd.FileName = fileObj0.FileName;
fileBlockEnd.Order_Num = _order_Num;
fileBlockEnd.EndFlag = true;
fileBlockEnd.CanReadLength = byteLength;
DownLoadFilesBlocksQueue.Instance.Add(fileBlockEnd);
//Utility.Log.Log.writeLineToLog("发送文件读取文件块：" + fileBlockEnd.Order_Num.ToString(), "DownLoadRead");
//更新Files队列中，对应File的ReadSize
DownLoadFilesQueue.Instance.Get(o.guId, out fileObj0);
fileObj0.ReadSize = fileObj0.ReadSize + byteLength;
fileObj0.ReadStatus = GetFileReadStatus.ReadEnd;
DownLoadFilesQueue.Instance.Add(o.guId, fileObj0);
//清空缓存区
Array.Clear(buffer, 0, buffer.Length);
}
}
public bool DownLoadFile(string path, string fileName, string guId, string UserID, string PCClientCookieStr, out string msg, out long FileSize)
{
if (!SessionCookie.CheckPCClientCookieStr(UserID, PCClientCookieStr))
{
msg = "Session Error";
FileSize = 0;
return false;
}
bool result = false;
try
{
string fileFullPath = Path.Combine(FilesBlocksQueue.Instance.SavePath + path, fileName);//合并路径生成文件存放路径
if (!File.Exists(fileFullPath))
{
msg = "File not find";
FileSize = 0;
return result;
}
FileInfo fileInfo = new FileInfo(fileFullPath);
FileSize = fileInfo.Length;
DownLoadFileOoj_Server fileObj = new DownLoadFileOoj_Server();
fileObj.FileName = fileName;
fileObj.serverDir = path;
fileObj.FileSize = fileInfo.Length;
fileObj.ReadSize = 0;
fileObj.SendSize = 0;
fileObj.ReadStatus = GetFileReadStatus.StartRead;
fileObj.SendStatus = GetFileSendStatus.waiting;
fileObj.guId = guId;
DownLoadFilesQueue.Instance.Add(guId, fileObj);
msg = "File have find, reading...";
lock (mylock0)
{
ParameterizedThreadStart ParStart = new ParameterizedThreadStart(ThreadMethod);
Thread myThread = new Thread(ParStart);
myThread.IsBackground = true;
FileThreadPramObj o = new FileThreadPramObj();
o.guId = guId;
o.myThread = myThread;
myThread.Start(o);
result = true;
}
//Action<Stream, string, string, string> readFile = SafeReadFile;
//readFile.BeginInvoke(fs, guId, fileName, path, null, null);
//result = true;
}
catch (Exception ex)
{
msg = "error";
result = false;
throw ex;
}
return result;
}
