Re: Socket IO
Chase Preuninger wrote:
I am writing a program that transfers files over a socket, the only
problem is that when the receiving side calls the read method it
always returns -1.
A few things seems "unusual" to me:
1) The order you are closing streams and sockets in - I would
close streams before socket.
2) Maybe a flush when writing would be a good idea.
3) Single byte read and write are very inefficient (even when
buffered).
Arne
//SENDING END
public void run()
{
Socket s = null;
InputStream in = null;
try
{
s = server.accept();
if(s.getInetAddress().getHostAddress().equalsIgnoreCase(validIP))
{
in = new BufferedInputStream(new
FileInputStream(from));
OutputStream out = new
BufferedOutputStream(s.getOutputStream());
for(int b = in.read(); b != -1; b = in.read())
{
out.write(b);
}
out.flush();
}
}
catch(Exception ex)
{
ex.printStackTrace();
}
finally
{
try
{
s.close();
}
catch(Exception ex){}
try
{
server.close();
}
catch(Exception ex){}
try
{
in.close();
}
catch(Exception ex){}
}
}
//DOWNLOADING SIDE
public void run()
{
Socket s = new Socket();
OutputStream out = null;
try
{
s.connect(addr);
ProgressMonitorInputStream in = new
ProgressMonitorInputStream(parent, "Downloading " + file,
s.getInputStream());
in.getProgressMonitor().setMaximum(1000);
out = new BufferedOutputStream(new FileOutputStream(to));
int b;
int read = 0;
while(!s.isClosed() && (b = in.read()) != -1)
{
out.write(b);
read++;
double frac = (double)read / (double)size;
frac *= 1000;
in.getProgressMonitor().setProgress((int)frac);
}
}
catch(Exception ex)
{
ex.printStackTrace();
}
finally
{
if(s != null && s.isConnected())
{
try
{
s.close();
}
catch(Exception ex){}
}
if(out != null)
{
try
{
out.close();
}
catch(Exception ex){}
}
}
}
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