Examples of java.net.Socket

java.net.Socket
This class implements client sockets (also called just "sockets"). A socket is an endpoint for communication between two machines.
The actual work of the socket is performed by an instance of the SocketImpl class. An application, by changing the socket factory that creates the socket implementation, can configure itself to create sockets appropriate to the local firewall. @author unascribed @version 1.115, 09/05/07 @see java.net.Socket#setSocketImplFactory(java.net.SocketImplFactory) @see java.net.SocketImpl @see java.nio.channels.SocketChannel @since JDK1.0

                        ssoc.setEnabledCipherSuites(ssl.getEnabledCipherSuites());
                    }
                    dataSoc = ssoc;
                } else {
                    LOG.debug("Opening active data connection");
                    dataSoc = new Socket();
                }


                dataSoc.setReuseAddress(true);


                InetAddress localAddr = resolveAddress(dataConfig
                        .getActiveLocalAddress());


                // if no local address has been configured, make sure we use the same as the client connects from
                if(localAddr == null) {
                    localAddr = ((InetSocketAddress)session.getLocalAddress()).getAddress();
                }       


                SocketAddress localSocketAddress = new InetSocketAddress(localAddr, dataConfig.getActiveLocalPort());
                
                LOG.debug("Binding active data connection to {}", localSocketAddress);
                dataSoc.bind(localSocketAddress);


                dataSoc.connect(new InetSocketAddress(address, port));
            } else {


                if (secure) {
                    LOG.debug("Opening secure passive data connection");
                    // this is where we wrap the unsecured socket as a SSLSocket. This is 
                    // due to the JVM bug described in FTPSERVER-241.


                    // get server socket factory
                    SslConfiguration ssl = getSslConfiguration();
                    
                    // we've already checked this, but let's do it again
                    if (ssl == null) {
                        throw new FtpException(
                                "Data connection SSL not configured");
                    }


                    SSLSocketFactory ssocketFactory = ssl.getSocketFactory();


                    Socket serverSocket = servSoc.accept();


                    SSLSocket sslSocket = (SSLSocket) ssocketFactory
                            .createSocket(serverSocket, serverSocket
                                    .getInetAddress().getHostAddress(),
                                    serverSocket.getPort(), true);
                    sslSocket.setUseClientMode(false);


                    // initialize server socket
                    if (ssl.getClientAuth() == ClientAuth.NEED) {
                        sslSocket.setNeedClientAuth(true);

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public class Start {
    public Start(String args[]) {
//      if(args.length == 0)
//        return;


      Socket sck = null;
      PrintWriter pw = null;
      try {          
        System.out.println("StartSocket: passing startup args to already-running Azureus java process.");
        
        sck = new Socket("127.0.0.1", 6880);
        
        pw = new PrintWriter(new OutputStreamWriter(sck.getOutputStream(),"UTF8"));
        
        StringBuffer buffer = new StringBuffer("Azureus Start Server Access;args;");
        
        for(int i = 0 ; i < args.length ; i++) {
          String arg = args[i].replaceAll("&","&&").replaceAll(";","&;");
          buffer.append(arg);
          buffer.append(';');
        }
       
        pw.println(buffer.toString());
        pw.flush();
      } catch(Exception e) {
        Debug.printStackTrace( e );
      } finally {
        try {
          if (pw != null)
            pw.close();
        } catch (Exception e) {
        }
        try {
          if (sck != null)
            sck.close();
        } catch (Exception e) {
        }
      }
    }

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     */
    private InputStream getDataInputStream() throws IOException {
        try {


            // get data socket
            Socket dataSoc = socket;
            if (dataSoc == null) {
                throw new IOException("Cannot open data connection.");
            }


            // create input stream
            InputStream is = dataSoc.getInputStream();
            if (factory.isZipMode()) {
                is = new InflaterInputStream(is);
            }
            return is;
        } catch (IOException ex) {

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     */
    private OutputStream getDataOutputStream() throws IOException {
        try {


            // get data socket
            Socket dataSoc = socket;
            if (dataSoc == null) {
                throw new IOException("Cannot open data connection.");
            }


            // create output stream
            OutputStream os = dataSoc.getOutputStream();
            if (factory.isZipMode()) {
                os = new DeflaterOutputStream(os);
            }
            return os;
        } catch (IOException ex) {

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  public void
  connect()
    throws IOException
    
  {
    socket = new Socket( "127.0.0.1", MagnetURIHandler.getSingleton().getPort());
            
    String  get = "GET " + "/download/" + getURL().toString().substring( 7 ) + " HTTP/1.0" + NL + NL;
    
    socket.getOutputStream().write( get.getBytes());

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  {
    bContinue = true;
    while (bContinue) {
      BufferedReader br = null;
      try {
        Socket sck = socket.accept();
        String address = sck.getInetAddress().getHostAddress();
        if (address.equals("localhost") || address.equals("127.0.0.1")) {
          br = new BufferedReader(new InputStreamReader(sck.getInputStream(),Constants.DEFAULT_ENCODING));
          String line = br.readLine();
          //System.out.println("received : " + line);
          
          if (Logger.isEnabled())
            Logger.log(new LogEvent(LOGID, "Main::startServer: received '"
                + line + "'"));
         
          if (line != null) {
            String [] args = parseArgs(line);
            if (args != null && args.length > 0) {
              String debug_str = args[0];
              for (int i=1; i<args.length; i++) {
                debug_str += " ; " + args[i];
              }
              Logger.log(new LogEvent(LOGID, "Main::startServer: decoded to '" + debug_str + "'"));
              processArgs(core,args);
            }
          }
        }
        sck.close();


      }
      catch (Exception e) {
        if(!(e instanceof SocketException))
          Debug.printStackTrace( e );

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        return openSocket(sockAddr, connectTimeout, POLL_DELAY, maxRetry);
    }


    public static Socket openSocket(SocketAddress sockAddr, int connectTimeout, long pollDelay, int maxRetry)
            throws IOException {
        Socket socket = new Socket();
        return openSocket(socket, sockAddr, connectTimeout, pollDelay, maxRetry);
    }

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            ch.configureBlocking(blocking);
        } catch (IOException e) {
            LOG.error("Failed to open SocketChannel.", e);
            throw new IllegalStateException(e);
        }
        final Socket sock = ch.socket();
        if(rcvbufSize != -1) {
            try {
                sock.setReceiveBufferSize(rcvbufSize);
            } catch (SocketException e) {
                LOG.error("Failed to setReceiveBufferSize.", e);
                throw new IllegalStateException(e);
            }
        }

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                    throw new Exception( "Invalid Password!" );
                }
            }


            // Open the connection.
            Socket socket = new Socket( InetAddress.getByName( host ), Integer.parseInt( port ) );


            // Capture the information about the connection.
            ConnectionInfo connectionInfo = new ConnectionInfo(
                    user,
                    request.getRemoteHost(),
                    host,
                    port,
                    socket,
                    new Date(),
                    socket.getInputStream(),
                    socket.getOutputStream() );


            // Add the connection to the manager.
            connectionManager.addConnection( connectionInfo );


            log.info( "Connection Opened: " + connectionInfo.toString() );

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    long  failed_accepts    = 0;
    
    while( !closed ){
      
      try{        
        Socket socket = ss.accept();
          
        successfull_accepts++;
        
        String  ip = socket.getInetAddress().getHostAddress();
                
        if ( (!isIPFilterEnabled()) || (!ip_filter.isInRange( ip, "Tracker", null ))){
          
          runProcessor( new TRBlockingServerProcessor( this, socket ));
          
        }else{
          
          socket.close();
        }
        
      }catch( Throwable e ){
        
        if ( !closed ){

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