add the Java Client from M0AZM

[spider.git] / SpiderConsole / src / Connection.java

diff --git a/SpiderConsole/src/Connection.java b/SpiderConsole/src/Connection.java
new file mode 100644 (file)
index 0000000..8f183a3
--- /dev/null
+++ b/SpiderConsole/src/Connection.java
@@ -0,0 +1,193 @@
+/**
+ * Ian's attempt at writing a socket module for the Spider GUI.
+ * @author Ian Norton
+ * @version 1.00 - 20010418.
+ *
+ * Copyright (C) 2001 Ian Norton.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public Licence as published by
+ * the Free Software Foundation; either version 2 of the Licence, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public Licence for more details.
+ *
+ * You should have received a copy of the GNU General Public Licence
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Contacting the author :
+ * Ian Norton
+ * i.norton@lancaster.ac.uk
+ * http://www.lancs.ac.uk/~norton/
+ **/
+
+import java.io.* ;
+import java.net.* ;
+
+public class Connection
+    {
+    // Host information.
+    private String host ;
+    private int port ;
+
+    // Socket.
+    private Socket socket ;
+    
+    // Socket input and output streams.
+    private InputStream is ;
+    private OutputStream os ;
+    
+    // Piped IO back up the chain.
+    private PipedInputStream pin ;
+    private PipedOutputStream pos ;
+
+    // IO readers.
+    private ConnectionInput conin ;
+    private ConnectionOutput conout ;
+
+    // Encoding String.
+    public static final String encoding = "latin1"; // "ISO8859_1";   
+
+    // Connection status.
+    private boolean disconnected ;
+
+    // Default port to use if one isn't specified.
+    // private static final int DEFAULTPORT = 8000 ; // Use this for user client
+    private static final int DEFAULTPORT = 27754 ;
+
+    /**
+     * Connection
+     * @param PipedInputStream - Stream to read from
+     * @param PipedOutputStream - Stream to send data to
+     * @param Console - Where to send status alerts to.
+     **/
+    public Connection(PipedInputStream i, PipedOutputStream o, Console c)
+        {
+        // Initialise the IO pipes.
+        pin = i ;
+        pos = o ;
+
+        // Yep, we're definately disconnected.
+        disconnected = false ;
+
+        // Initialise the Input and Output readers.
+        conin = new ConnectionInput(pos, this) ;
+        conout = new ConnectionOutput(pin, this) ;
+        }
+
+    /**
+     * connect
+     * @param String - host to connect to.  Port after a ':'.
+     **/
+    public void connect(String s)
+        {
+        // Has the socket been initialised?
+        if(socket != null)
+            disconnect() ;
+        
+        // Work out the hostname and port.
+        if(s.indexOf(":") > - 1)
+            {
+            try
+                {
+                port = Integer.valueOf(s.substring(s.indexOf(":") + 1, s.length())).intValue() ;
+                }
+            catch(NumberFormatException ex)
+                {
+                System.out.println("Number format exception - bad int in String.") ;
+                }
+
+            s = s.substring(0, s.indexOf(":")) ;
+            }
+        else
+            {
+            port = DEFAULTPORT ;
+            }
+
+        host = s ;
+
+        // Try and make the connection.
+        try
+            {
+            socket = new Socket(host, port) ;
+            }
+        catch(UnknownHostException ex)
+            {
+            System.out.println("Connection: UnknownHostException") ;
+            System.out.println(ex) ;
+            }
+        catch(IOException ex)
+            {
+            System.out.println("Connection: IOException") ;
+            System.out.println(ex) ;
+            }
+
+        // Get the streams from the connection.
+        try
+            {
+            is = socket.getInputStream() ;
+            os = socket.getOutputStream() ;
+            }
+        catch(IOException ex)
+            {
+            System.out.println("Connection: IOException getting the connection streams") ;
+            System.out.println(ex) ;
+            }
+
+        // Start the readers.
+        conin.start(is) ;
+        conout.start(os) ;
+
+        // Write a "Connected to " message to the multiplexor.
+        try
+            {
+            // Write disconnected to the PipedOutputStream.
+            String output = "\nConnected to " + host + ":" + port + "\n" ;
+            for(int i=0;i<output.length();i++)
+                {
+                pos.write(output.charAt(i)) ;
+                }
+            }
+        catch(IOException ex)
+            {
+
+            }
+            
+        disconnected = false ;
+        }
+
+    /**
+     * disconnect - disconnect the current connection.
+     **/
+    public void disconnect()
+        {
+        try
+            {
+            if(!disconnected)
+                {
+                disconnected = true ;
+                conin.disconnect() ;
+                conout.disconnect() ;
+
+                // Write disconnected to the PipedOutputStream.
+                String output = "\nDisconnected from " + host + ":" + port + "\n" ;
+                for(int i=0;i<output.length();i++)
+                    {
+                    pos.write(output.charAt(i)) ;
+                    }
+                }
+
+
+            if(socket != null) socket.close() ;
+            }
+        catch(IOException ex)
+            {
+            System.out.println("Connection: IOException closing socket") ;
+            System.out.println(ex) ;
+            }
+        }
+    } // End of class