private uint onWrite(BaiduPCS sender, byte[] data, uint contentlength, object userdata)
{
Slice slice = (Slice)userdata;
if (slice.tid != Interlocked.Read(ref taskId))//本次任务被取消
{
lock (locker)
{
if (IsCancelled)
{
slice.status = SliceStatus.Cancelled;
}
else
{
slice.status = SliceStatus.Failed;
}
}
return(0);
}
long size = data.Length;
if (size > slice.totalSize - slice.doneSize)
{
size = slice.totalSize - slice.doneSize;
}
if (size > 0)
{
try
{
bigfile.Update(slice.start + slice.doneSize, data, 0, (int)size);
}
catch (Exception ex)
{
throw;
}
}
slice.doneSize += size;
lock (locker) DoneSize += size;
if (slice.doneSize == slice.totalSize) //分片已经下载完成
{
slice.status = SliceStatus.Successed;
size = 0;
}
lock (sliceFileLocker) SliceHelper.SaveSliceList(SliceFileName, SliceList); // 保存最新的分片数据
long downloadedSize = 0;
lock (locker) downloadedSize = DoneSize;
ProgressEventArgs args = new ProgressEventArgs(downloadedSize, from.size);
fireProgress(args);
if (args.Cancel)
{
slice.status = SliceStatus.Cancelled;
return(0);
}
return((uint)size);
}
private void CreateOrRestoreSliceList()
{
// 分片文件存在，则从该文件中还原分片信息
if (File.Exists(SliceFileName))
{
SliceList = SliceHelper.RestoreSliceList(SliceFileName);
return;
}
// 新建分片
SliceList = SliceHelper.CreateSliceList(from.size, MinSliceSize);
//保存一次新创建的分片列表
SliceHelper.SaveSliceList(SliceFileName, SliceList);
}
private void CreateOrRestoreSliceList()
{
// 分片文件存在，则从该文件中还原分片信息
if (File.Exists(SliceFileName))
{
SliceList = SliceHelper.RestoreSliceList(SliceFileName);
return;
}
long slizeSize = SliceHelper.CalculateSliceSize(fromFileInfo.Length, MIN_SLICE_SIZE, MAX_SLICE_COUNT);
// 新建分片
SliceList = SliceHelper.CreateSliceList(fromFileInfo.Length, (int)slizeSize);
//保存一次新创建的分片列表
SliceHelper.SaveSliceList(SliceFileName, SliceList);
}
private void Flush()
{
if (cache.TotalSize > 0)
{
lock (cache)
{
if (cache.TotalSize > 0)
{
cache.Flush();
cache.Reset();
SliceHelper.SaveSliceList(SliceFileName, SliceList); // 保存最新的分片数据
}
}
}
}
private void uploadTask(object objTID)
{
long tid = (long)objTID;
try
{
BaiduPCS pcs;
Slice slice;
PcsFileInfo rf;
pcs = this.pcs.clone();
while (tid == Interlocked.Read(ref taskId))
{
slice = popSlice();
if (slice == null)
{
break;
}
slice.tid = tid;
pcs.WriteUserData = slice;
rf = pcs.upload_slicefile(new OnReadBlockFunction(Read), slice, (uint)slice.totalSize);
if (!string.IsNullOrEmpty(rf.md5))
{
slice.md5 = rf.md5;
slice.status = SliceStatus.Successed;
}
else if (slice.status == SliceStatus.Cancelled)
{
Cancel();
}
else
{
slice.status = SliceStatus.Failed;
lock (locker) Error = new Exception(pcs.getError());
StopAllDownloadThreads();
}
lock (sliceFileLocker) SliceHelper.SaveSliceList(SliceFileName, SliceList);
}
}
catch (Exception ex)
{
lock (locker) Error = ex;
StopAllDownloadThreads();
}
Interlocked.Decrement(ref runningThreadCount);
}
public override void Download()
{
if (Downloading)
{
throw new Exception("Can't download, since the previous download is not complete.");
}
DoneSize = 0;
Success = false;
IsCancelled = false;
Error = null;
Downloading = true;
SliceFileName = null;
SliceList = null;
bigfile = null;
try
{
SliceFileName = "download-" + from.md5 + ".slice";
SliceFileName = Path.Combine(Path.Combine(WorkFolder, pcs.getUID()), SliceFileName);
StateFileNameDecideEventArgs args = new StateFileNameDecideEventArgs()
{
SliceFileName = SliceFileName
};
fireStateFileNameDecide(args);
SliceFileName = args.SliceFileName;
CreateOrRestoreSliceList(); // 创建或还原分片列表
CreateDirectory(to); //创建目录
CreateLocalFile(); // 如果需要则创建本地文件
bigfile = new BigFileHelper(to, from.size); //映射文件到内存
foreach (Slice slice in SliceList)
{
if (slice.status != SliceStatus.Successed)
{
slice.status = SliceStatus.Pending; //重新下载未成功的分片
slice.doneSize = 0;
}
else
{
DoneSize += slice.doneSize;
}
}
DownloadSliceList(); // 启动线程来下载分片
Wait(); // 等待所有线程退出
CheckResult(); // 检查下载结果
}
catch (Exception ex)
{
Success = false;
IsCancelled = false;
Error = ex;
}
if (bigfile != null)
{
bigfile.Dispose();
bigfile = null;
}
if (Success)
{
SliceHelper.DeleteSliceFile(SliceFileName);
}
Downloading = false;
fireCompleted(new CompletedEventArgs(Success, IsCancelled, Error));
}
public override void Upload()
{
if (Uploading)
{
throw new Exception("Can't upload, since the previous upload is not complete.");
}
DoneSize = 0;
Success = false;
IsCancelled = false;
Error = null;
Uploading = true;
SliceFileName = null;
SliceList = null;
fromFileInfo = null;
try
{
BaiduPCS pcs = this.pcs.clone();
string key;
if (string.IsNullOrEmpty(FileMD5))
{
string validate_md5, validate2_md5;
fromFileInfo = new FileInfo(from);
if (!pcs.md5(from, 0, MIN_SLICE_SIZE, out validate_md5))
{
throw new Exception("Can't calculate md5 for " + from + ".");
}
if (!pcs.md5(from, fromFileInfo.Length - MIN_SLICE_SIZE, MIN_SLICE_SIZE, out validate2_md5))
{
throw new Exception("Can't calculate md5 for " + from + ".");
}
key = from + " => " + to + ", size=" + fromFileInfo.Length.ToString() + ", validate1_md5=" + validate_md5 + ", validate2_md5=" + validate2_md5;
key = Utils.md5(key.ToLower());
}
else
{
key = FileMD5;
}
SliceFileName = "upload-" + key + ".slice";
SliceFileName = Path.Combine(WorkFolder, pcs.getUID(), SliceFileName);
StateFileNameDecideEventArgs args = new StateFileNameDecideEventArgs()
{
SliceFileName = SliceFileName
};
fireStateFileNameDecide(args);
SliceFileName = args.SliceFileName;
CreateOrRestoreSliceList(); // 创建或还原分片列表
foreach (Slice slice in SliceList)
{
if (slice.status != SliceStatus.Successed)
{
slice.status = SliceStatus.Pending; //重新上传未成功的分片
slice.doneSize = 0;
}
else
{
DoneSize += slice.doneSize;
}
}
UploadSliceList(); // 启动线程来下载分片
Wait(); // 等待所有线程退出
List <string> md5list = new List <string>();
if (CheckResult(md5list)) // 检查下载结果
{
Result = pcs.create_superfile(to, md5list.ToArray(), IsOverWrite);
if (!Result.IsEmpty)
{
Success = true;
IsCancelled = false;
}
else
{
Success = false;
IsCancelled = false;
Error = new Exception(pcs.getError());
}
}
else
{
Success = false;
}
}
catch (Exception ex)
{
Success = false;
IsCancelled = false;
Error = ex;
}
if (Success)
{
SliceHelper.DeleteSliceFile(SliceFileName);
}
Uploading = false;
fireCompleted(new CompletedEventArgs(Success, IsCancelled, Error));
}
private uint onWrite(BaiduPCS sender, byte[] data, uint contentlength, object userdata)
{
Slice slice = (Slice)userdata;
try
{
if (slice.tid != Interlocked.Read(ref taskId))//本次任务被取消
{
lock (locker)
{
if (IsCancelled)
{
slice.status = SliceStatus.Cancelled;
}
else
{
slice.status = SliceStatus.Failed;
}
}
return(0);
}
long size = data.Length;
if (size > slice.totalSize - slice.doneSize)
{
size = slice.totalSize - slice.doneSize;
}
if (size > 0)
{
lock (cache)
cache.Add(slice.start + slice.doneSize, data, (int)size);
}
slice.doneSize += size;
lock (locker) DoneSize += size;
if (slice.doneSize == slice.totalSize) //分片已经下载完成
{
slice.status = SliceStatus.Successed;
size = 0;
}
lock (cache)
{
if (cache.TotalSize >= AppSettings.MaxCacheSize * 1024)
{
cache.Flush();
cache.Reset();
SliceHelper.SaveSliceList(SliceFileName, SliceList); // 保存最新的分片数据
}
}
long downloadedSize = 0;
lock (locker) downloadedSize = DoneSize;
ProgressEventArgs args = new ProgressEventArgs(downloadedSize, from.size);
fireProgress(args);
if (args.Cancel)
{
slice.status = SliceStatus.Cancelled;
lock (locker) Error = new Exception("Cancelled");
return(0);
}
return((uint)size);
}
catch (Exception ex)
{
lock (locker) Error = ex;
slice.status = SliceStatus.Error;
}
return(0);
}