public bool SendAllHashes()
{
if (!RegistrationProcessStarted)
{
return(false);
}
else
{
RegistrationProcessStarted = true;
sendAllInProgress = true;
int count = Sizes.GetChunksNumber(fd.FileSize);
for (int i = 0; i < count - 1; i++)
{
if (i != count - 1)
{
if (ReadChunk(0) == null)
{
return(false);
}
SendHash(i, MakeHash(ReadChunk(i)));
}
}
SendHash(count - 1, MakeHash(ReadLastChunk(count - 1)));
sendAllInProgress = false;
return(true);
}
}
public void InitReceiver(FileDescription fd)
{
this.fd = fd;
hm = new HashManager(-1, Sizes.GetChunksNumber(fd.FileSize), fd.FileId, this);
DataMessageProvider dmp = new DataMessageProvider(SocketResourcesManager.srm.ProvideBuffer());
OutputMessage om = dmp.ProvideFileHashTransferRequestMessage(fd.FileId);
ClientCommunicationCenter.commCenter.SendMessageToServer(om);
}
public bool CheckChunkHash(Chunk chunk)
{
int chunkCount = Sizes.GetChunksNumber(this.FileDescription.FileSize);
byte[] correctHash = fileManager.ReadHashFromDescriptor(chunk.ChunkId, chunkCount);
byte[] calculatedHash = new SHA256Managed().ComputeHash(chunk.Data);
for (int i = 0; i < Sizes.HashSizeByte; i++)
{
if (correctHash[i] != calculatedHash[i])
{
return(false);
}
}
return(true);
}
public void ResendHash(int chunkId)
{
if (sendAllInProgress)
{
return;
}
if (chunkId != Sizes.GetChunksNumber(fd.FileSize) + 1)
{
SendHash(chunkId, MakeHash(ReadChunk(chunkId)));
}
else
{
SendHash(chunkId, MakeHash(ReadLastChunk(chunkId)));
}
}
public FileState ProvideFileState(int fileId)
{
FileDescription fd = FileDescriptions[fileId];
string fullName = fd.FileName;
if (fd.FileExtension != null && fd.FileExtension != "")
{
fullName += "." + fd.FileExtension;
}
FileStream mainFileStream = new FileStream(fd.Path + "\\" + fullName, FileMode.Open, FileAccess.ReadWrite);
if (fd.Fts != FileTransferState.Deleted && fd.Fts != FileTransferState.Finished)
{
FileStream descriptorFile = new FileStream(".\\descriptors\\descriptor_" + fullName + ".desc", FileMode.Open, FileAccess.ReadWrite);
FileState fs = new FileState();
fs.FileDescription = fd;
byte[] chunksState = new byte[Sizes.GetChunksNumber(fd.FileSize)];
descriptorFile.Seek(0, SeekOrigin.Begin);
int numberOfChunks = Sizes.GetChunksNumber(fd.FileSize);
descriptorFile.Read(chunksState, 0, numberOfChunks);
fs.ChunksState = Utils.GetBitForByte(chunksState);
int downloaded = 0;
foreach (bool b in fs.ChunksState)
{
if (b == true)
{
downloaded++;
}
}
fs.FinishedChunksNumber = downloaded;
fs.FileManager = new FileIOManager(mainFileStream, descriptorFile);
return(fs);
}
else
{
FileState fs = new FileState();
fs.FileDescription = fd;
fs.FinishedChunksNumber = fs.NumberOfChunks;
fs.FileManager = new FileIOManager(mainFileStream);
return(fs);
}
}
private void CreateDescriptorFile(FileDescription fd, ChunkHash[] hashes)
{
FileStream fileStream = new FileStream(".\\descriptors\\descriptor_" + fd.FileName + "." + fd.FileExtension + ".desc", FileMode.Create, FileAccess.Write);
byte[] data = new byte[Sizes.GetChunksNumber(fd.FileSize)];
for (int i = 0; i < data.Length; i++)
{
data[i] = 0;
}
fileStream.Write(data, 0, data.Length);
foreach (ChunkHash h in hashes)
{
fileStream.Write(h.Hash, 0, h.Hash.Length);
}
fileStream.Flush();
fileStream.Close();
}
public void HandleRequestFileUpload(C2SMessageReader mr)
{
if (!ServerCommunicationCenter.commCenter.ClientsEndPoint.ContainsKey(mr.ClientEP()))
{
return;
}
Debug.WriteLine("SR: Received request for registration");
ServerMessageProvider smp = new ServerMessageProvider(SocketResourcesManager.srm.ProvideBuffer());
OutputMessage om;
string fileFullName = mr.ReadRegisteringFileFullName();
string ext = Utils.GetFileExtensionFromPath(fileFullName);
string name = Utils.GetFileNameFromPath(fileFullName);
bool duplikat = File.Exists(name, ext, mr.ReadRegisteringFileSize());
if (!duplikat)
{
File f = new File();
f.ApplicationId = mr.ClientEP();
f.FileExtension = ext;
f.FileName = name;
f.FileSize = mr.ReadRegisteringFileSize();
int fileId = f.Add();
om = smp.ProvidePositiveUploadFileMessage(fileId);
HashManager shr = new HashManager(mr.ClientEP(), Sizes.GetChunksNumber(mr.ReadRegisteringFileSize()), fileId, new ServerHashManagerListener());
Debug.WriteLine("File: " + fileId);
Debug.WriteLine("FileSize: " + f.FileSize);
ServerObjectGraph.sog.FileRegistrations.Add(fileId, shr);
Debug.WriteLine("SR: Registration approved");
}
else
{
om = smp.ProvideNegativeUploadFileMessage();
}
ServerCommunicationCenter.commCenter.SendMessageTo(mr.ClientEP(), om);
}
