private void MessageReceived(string message, string ip, Information info, string recvIndex, string countRes)
// the clients who wants to download send me my index and how many resources there are
{
try
{
int start, end;
string name = "";
name = message; // file name
int resourceIndx = int.Parse(recvIndex);
int countResources = int.Parse(countRes);
/** sending file content to client**/
TcpClient fileClnt = new TcpClient(); // create tcp listener
fileClnt.Connect(ip, info.Port); // connect with port 8006 to endpoint
strm = fileClnt.GetStream();
string type = "file";
byte[] typeB = Encoding.ASCII.GetBytes(type);
Thread.Sleep(4000);
strm.Write(typeB, 0, typeB.Length); // send msg type
DownloadMessage downloadMsg = new DownloadMessage();
downloadMsg.fileName = name;
/** reading file content **/
byte[] fileContentMsg = File.ReadAllBytes(info.Path + "\\" + name);
start = resourceIndx * (fileContentMsg.Length / countResources);
if (resourceIndx == countResources - 1) // last index needs to add modolu
{
end = (resourceIndx + 1) * (fileContentMsg.Length / countResources) + (fileContentMsg.Length % countResources);
}
else
{
end = (resourceIndx + 1) * (fileContentMsg.Length / countResources);
}
byte[] sendFileB = new byte[end - start]; // create bytes array with section size (2 rows)
Array.Copy(fileContentMsg, start, sendFileB, 0, end - start);
downloadMsg.fileContent = sendFileB;
downloadMsg.index = "" + resourceIndx;
downloadMsg.numOfResorces = "" + countResources;
downloadMsg.fileSize = "" + fileContentMsg.Length;
string downloadSendMsg = MessageHendler.SerializeAnObject(downloadMsg); // convert from object to xml string
byte[] contentBytes = Encoding.ASCII.GetBytes(downloadSendMsg); // convert to bytes
Thread.Sleep(4000);
strm.Write(contentBytes, 0, contentBytes.Length); // send
strm.Close();
fileClnt.Close();
}
catch (Exception ex)
{
System.Windows.MessageBox.Show("In download progress, please try later");
}
}
/** this is the thread function which recieves messages and listen to clients - server **/
private void Receiver(Object obj)
{
Information info = (Information)obj;
receivingClient.Start(); // strat tcpListener
IPEndPoint endPoint = new IPEndPoint(IPAddress.Any, port); // get messages from any ip
event1 += new AddMessage(MessageReceived); // add action listener to delegete
string message;
while (true)
{
try
{
Socket s = receivingClient.AcceptSocket();
/** recieving request type **/
byte[] bReq = new byte[s.SendBufferSize];
int reqSize = s.Receive(bReq);
message = "";
for (int i = 0; i < reqSize; i++) // convert from byte to string
{
message += Convert.ToChar(bReq[i]);
}
// check request type:
if (info.IpAddress.Equals(message)) // log out
{
// closing window request - if recieved ip is equal to my ip - stop listening.
break;
}
else
{
if (message.Equals("file")) // recieve file that i downloaded
{
byte[] recvFileInfoB = new byte[s.SendBufferSize]; // get file info in bytes
int k = s.Receive(recvFileInfoB);
string recvFileInfo = "";
for (int i = 0; i < k; i++) // convert from byte to string
{
recvFileInfo += Convert.ToChar(recvFileInfoB[i]);
}
Array.Clear(recvFileInfoB, 0, recvFileInfoB.Length);
DownloadMessage DownloadMessage = new DownloadMessage(); // class of downloaded message details
Object ob = MessageHendler.DeSerializeAnObject(recvFileInfo, DownloadMessage.GetType()); // convert from string to DownloadMessage object (2 rows)
DownloadMessage myDownloadMessage = (DownloadMessage)ob;
int resourceIndex = int.Parse(myDownloadMessage.index); // get idx from DownloadMessage obj
int countResources = int.Parse(myDownloadMessage.numOfResorces); // get num of resources from DownloadMessage obj
int fileSize = int.Parse(myDownloadMessage.fileSize); // get file size from DownloadMessage obj
string fileInfo = "";
fileInfo = info.Path + "\\" + myDownloadMessage.fileName;
if (resourceIndex == 0) // create new file only if this is the first source index
{
File.WriteAllBytes(fileInfo, myDownloadMessage.fileContent);
}
else // not first source index
{
using (var stream = new FileStream(fileInfo, FileMode.Append))
{
// concat to last part of file
stream.Write(myDownloadMessage.fileContent, 0, myDownloadMessage.fileContent.Length);
}
}
ts = DateTime.Now - dt; // calc dowmload time
string downloadedMsg = "";
int idx = resourceIndex + 1;
downloadedMsg += "" + idx + " / " + countResources + " arrived! \n";
downloadedMsg += "total time: " + ts.Seconds + " seconds. \n";
downloadedMsg += "total length: " + myDownloadMessage.fileContent.Length + " kb. \n";
downloadedMsg += "bit rate: " + myDownloadMessage.fileContent.Length / ts.Seconds + " kb/s. \n";
System.Windows.MessageBox.Show(downloadedMsg);
if (resourceIndex == countResources - 1) // last resource
{
// create new MyFile and add it to DB
long length = new System.IO.FileInfo(fileInfo).Length;
MyFile myFile = new MyFile();
myFile.fileName = myDownloadMessage.fileName;
myFile.size = fileSize;
myFile.IP = info.IpAddress;
myFile.port = info.Port;
myFile.path = info.Path;
MessageHendler.insertNewFile(myFile);
}
}
else // another client download file from me
{
byte[] recvFileInfoB = new byte[s.SendBufferSize]; // get wanted file info
int k = s.Receive(recvFileInfoB);
string recvFileInfo = "";
for (int i = 0; i < k; i++)
{
recvFileInfo += Convert.ToChar(recvFileInfoB[i]);
}
Array.Clear(recvFileInfoB, 0, recvFileInfoB.Length);
FileReqMessage fileReq = new FileReqMessage();
Object ob = MessageHendler.DeSerializeAnObject(recvFileInfo, fileReq.GetType()); // convert from string to FileReqMessage obj (2 rows)
FileReqMessage myfileReq = (FileReqMessage)ob;
event1(myfileReq.fileName, myfileReq.myIP, info, myfileReq.resourceIndex, myfileReq.numOfResources); // call delegete func
}
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show("In download progress, please try later");
}
}
receivingClient.Stop(); // stop listening
System.Windows.MessageBox.Show("bye bye");
return;
}
