public static bool upload(string fileHash, NetworkStream serverStream, string peerName)
{
Configuration.writeLog("Upload module started.");
bool successfulTransfer = false;
byte[] byteSend = new byte[8096];
//byte[] byteSend = new byte[1450];
string filePath = "";
string fileName = "";
long fileSize = 0;
TransferDetail tdCurrent = new TransferDetail(fileHash, 'u');
tdCurrent.peerName = peerName;
//Get file path from hash.
//TODO - Add error checking here.!!
filePath = (string)Index.filehashes[fileHash];
FileStream fstFile;
string[] temp;
try
{
if (filePath == null)
{
Configuration.writeLog("upload : Incorrect args passed.");
return false;
}
temp = filePath.Split('\\');
fileName = temp[temp.Length - 1];
//Start reading the file as binary
fstFile = null;
fstFile = new FileStream(filePath, FileMode.Open, FileAccess.Read);
}
//TODO - Put better exception handling
catch (Exception e)
{
Configuration.writeLog("Upload module reported error : " + e.ToString());
sendMessage("404", serverStream);
serverStream.Close();
return false;
}
BinaryReader binFile = new BinaryReader(fstFile);
FileInfo fInfo = new FileInfo(filePath);
Configuration.writeLog("Upload module : Started reading file from disk : " + filePath);
Thread.Sleep(1000);
fileName = fInfo.Name;
fileSize = fInfo.Length;
long bytesUploaded = 0;
TimeSpan duration = new TimeSpan();
float tempTransferRate = 0;
try
{
Configuration.writeLog("Upload module : Sending file details..");
sendMessage(fileName + "\n" + fileSize.ToString() + "\n", serverStream);
tdCurrent.newTransfer(fileName, fileSize, "", "");
passiveWorker.ReportProgress(0, tdCurrent);
Configuration.writeLog("Upload module : Sending the file " + fileName + "(" + fileSize + ")");
int bytesSize = 0;
//Changes how fast the upload progress in the UI changes.
int displayRefreshFactor = 10;
int currentCycle = 0;
DateTime startTime = DateTime.Now;
DateTime currentTime;
//Send the file.
while ((bytesSize = fstFile.Read(byteSend, 0, byteSend.Length)) > 0)
{
//TODO - Remove the next line, it's for simulation only.
//Thread.Sleep(30);
currentCycle = currentCycle + 1;
bytesUploaded = bytesUploaded + bytesSize;
serverStream.Write(byteSend, 0, bytesSize);
if (currentCycle == displayRefreshFactor)
{
tempTransferRate = (float)(1.0 * bytesUploaded / (1024 * duration.Seconds));
tdCurrent.updateTransferProgress(bytesUploaded, tempTransferRate, 0);
passiveWorker.ReportProgress(0, tdCurrent);
currentCycle = 0;
}
currentTime = DateTime.Now;
duration = currentTime - startTime;
}
tdCurrent.updateTransferProgress(bytesUploaded, tempTransferRate, 0);
tdCurrent.status = ("Uploaded in " + duration.Seconds.ToString() + " secs");
passiveWorker.ReportProgress(0, tdCurrent);
Configuration.writeLog("Upload module : Sent file " + fileName);
successfulTransfer = true;
}
catch (Exception e)
{
Configuration.writeLog("Upload module reported error : " + e.ToString());
tdCurrent.updateTransferProgress(bytesUploaded, tempTransferRate, 0);
tdCurrent.status = ("Upload error.");
passiveWorker.ReportProgress(0, tdCurrent);
successfulTransfer = false;
}
finally
{
serverStream.Close();
fstFile.Close();
}
return successfulTransfer;
}
public static string download(TcpClient tcpClient, NetworkStream clientStream, string fileHash, string peerIP, string peerName)
{
//Downloads a file from peer. Returns the path of the downloaded file.
FileStream strLocal = null;
string fileName = "";
bool successfulTransfer = false;
long fileSize = 0;
TransferDetail tdCurrent = new TransferDetail(fileHash, 'd');
try
{
//Setting state of file to 'downloading'
userDownloadState[fileHash] = 1;
// For holding the number of bytes we are reading at one time from the stream
int bytesSize = 0;
byte[] downBuffer = new byte[4096];
//byte[] downBuffer = new byte[1300];
Configuration.writeLog("Download module : Getting file details..");
string instruction_params = receiveMessage(clientStream);
//TODO - If 404, tell user better instead of silently failing
if (instruction_params == "404")
{
Configuration.writeLog("Download module : Peer reported file not found.");
return "ERROR";
}
string[] instructions = instruction_params.Split('\n');
if(instructions.Length<2)
{
Configuration.writeLog("download : Incorrect params passed " + instruction_params);
}
fileName = instructions[0];
fileSize = Convert.ToInt64(instructions[1]);
Configuration.writeLog("Download module : Beginning download of " + fileName + " (" + fileSize + ") bytes");
//Reporting addition to UI.
tdCurrent.newTransfer(fileName, fileSize, peerIP, peerName);
passiveWorker.ReportProgress(0, tdCurrent);
long bytesUploaded = 0;
int displayRefreshFactor = (int)fileSize/1000000; //Changes how fast the download progress in the UI changes.
int currentCycle = 0;
DateTime startTime = DateTime.Now;
DateTime currentTime;
TimeSpan duration = new TimeSpan();
float tempTransferRate = 0;
strLocal = new FileStream(Configuration.downloadFolder + "\\" + fileName, FileMode.Create, FileAccess.Write, FileShare.ReadWrite);
//Performing file transfer.
while ((bytesSize = clientStream.Read(downBuffer, 0, downBuffer.Length)) > 0)
{
//In case user cancels download.
if ((int)userDownloadState[fileHash] == 0)
{
tdCurrent.systemStatus = "CANCELED";
tdCurrent.status = "Canceled.";
passiveWorker.ReportProgress(0, tdCurrent);
return "ERROR";
}
currentCycle = currentCycle + 1;
bytesUploaded = bytesUploaded + bytesSize;
strLocal.Write(downBuffer, 0, bytesSize);
//TODO: Make this fixed update - every half a second or so, and not dependent on file
//size.
if (currentCycle == displayRefreshFactor)
{
tempTransferRate = (float)(1.0 * bytesUploaded / (1024 * duration.Seconds));
tdCurrent.updateTransferProgress(bytesUploaded, tempTransferRate, 0);
passiveWorker.ReportProgress(0, tdCurrent);
currentCycle = 0;
}
currentTime = DateTime.Now;
duration = currentTime - startTime;
}
tdCurrent.updateTransferProgress(bytesUploaded, tempTransferRate, 0);
tdCurrent.status=("Downloaded in " + duration.Seconds.ToString() + " secs");
passiveWorker.ReportProgress(0, tdCurrent);
successfulTransfer = true;
strLocal.Close();
}
catch (Exception e)
{
successfulTransfer = false;
Configuration.writeLog("Download module reported error : " + e.ToString());
tdCurrent.transferRate = 0;
tdCurrent.status = "Download failed.";
}
finally
{
clientStream.Close();
}
if (successfulTransfer)
{
Configuration.writeLog("Download module : Successfully downloaded " + fileName + "(" + fileSize + ")");
}
return Configuration.downloadFolder + "\\" + fileName;
}