EchoServerpublic class EchoServer extends Object | EchoServer - create server socket, do I-O on it. |
| Fields Summary |
|---|
| protected ServerSocket | sockOur server-side rendezvous socket | | public static final int | ECHOPORTThe port number to use by default | | protected boolean | debugFlag to control debugging |
| Constructors Summary |
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public EchoServer(int port)Construct an EchoServer on the given port number
try {
sock = new ServerSocket(port);
} catch (IOException e) {
System.err.println("I/O error in setup");
System.err.println(e);
System.exit(1);
}
|
| Methods Summary |
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| protected void | handle()This handles the connections
Socket ios = null;
BufferedReader is = null;
PrintWriter os = null;
while (true) {
try {
System.out.println("Waiting for client...");
ios = sock.accept();
System.err.println("Accepted from " +
ios.getInetAddress().getHostName());
is = new BufferedReader(
new InputStreamReader(ios.getInputStream(), "8859_1"));
os = new PrintWriter(
new OutputStreamWriter(
ios.getOutputStream(), "8859_1"), true);
String echoLine;
while ((echoLine = is.readLine()) != null) {
System.err.println("Read " + echoLine);
os.print(echoLine + "\r\n");
os.flush();
System.err.println("Wrote " + echoLine);
}
System.err.println("All done!");
} catch (IOException e) {
System.err.println(e);
} finally {
try {
if (is != null)
is.close();
if (os != null)
os.close();
if (ios != null)
ios.close();
} catch (IOException e) {
// These are unlikely, but might indicate that
// the other end shut down early, a disk filled up
// but wasn't detected until close, etc.
System.err.println("IO Error in close");
}
}
}
/*NOTREACHED*/
| | public static void | main(java.lang.String[] argv)main: construct and run
new EchoServer(ECHOPORT).handle();
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