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1   /*
2    $Id: GroovySocketServer.java,v 1.6 2005/04/05 09:15:35 jez Exp $
3   
4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5   
6    Redistribution and use of this software and associated documentation
7    ("Software"), with or without modification, are permitted provided
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13  
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18  
19   3. The name "groovy" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Codehaus.  For written permission,
22      please contact info@codehaus.org.
23  
24   4. Products derived from this Software may not be called "groovy"
25      nor may "groovy" appear in their names without prior written
26      permission of The Codehaus. "groovy" is a registered
27      trademark of The Codehaus.
28  
29   5. Due credit should be given to The Codehaus -
30      http://groovy.codehaus.org/
31  
32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43   OF THE POSSIBILITY OF SUCH DAMAGE.
44  
45   */
46  
47  package groovy.ui;
48  import groovy.lang.*;
49  import java.io.*;
50  import java.net.*;
51  
52  /***
53   * Simple server that executes supplied script against a socket
54   * @author Jeremy Rayner
55   */
56  
57  public class GroovySocketServer implements Runnable {
58      private URL url;
59      private GroovyShell groovy;
60      private boolean isScriptFile;
61      private String scriptFilenameOrText;
62      private boolean autoOutput;
63      
64      public GroovySocketServer(GroovyShell groovy, boolean isScriptFile, String scriptFilenameOrText, boolean autoOutput, int port) {
65          this.groovy = groovy;
66          this.isScriptFile = isScriptFile;
67          this.scriptFilenameOrText = scriptFilenameOrText;
68          this.autoOutput = autoOutput;
69          try {
70              url = new URL("http", InetAddress.getLocalHost().getHostAddress(), port, "/");
71              System.out.println("groovy is listening on port " + port);
72          } catch (IOException e) { 
73              e.printStackTrace();
74          }
75          new Thread(this).start();
76      }
77  
78      public void run() {
79          try {
80              ServerSocket serverSocket = new ServerSocket(url.getPort());
81              while (true) {
82                  // Create one script per socket connection.
83                  // This is purposefully not caching the Script
84                  // so that the script source file can be changed on the fly,
85                  // as each connection is made to the server.
86                  Script script;
87                  if (isScriptFile) {
88                      GroovyMain gm = new GroovyMain();
89                      script = groovy.parse(new FileInputStream(gm.huntForTheScriptFile(scriptFilenameOrText)));
90                  } else {
91                      script = groovy.parse(scriptFilenameOrText);
92                  }
93                  new GroovyClientConnection(script, autoOutput, serverSocket.accept());
94              }
95          } catch (Exception e) {
96              e.printStackTrace();
97          }
98      }
99      
100     class GroovyClientConnection implements Runnable {
101         private Script script;
102         private Socket socket;
103         private BufferedReader reader;
104         private PrintWriter writer;
105         private boolean autoOutput;
106     
107         GroovyClientConnection(Script script, boolean autoOutput,Socket socket) throws IOException {
108             this.script = script;
109             this.autoOutput = autoOutput;
110             this.socket = socket;
111             reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
112             writer = new PrintWriter(socket.getOutputStream());
113             new Thread(this, "Groovy client connection - " + socket.getInetAddress().getHostAddress()).start();
114         }
115         public void run() {
116             try {
117                 String line = null;
118                 script.setProperty("out", writer);
119                 script.setProperty("socket", socket);
120                 script.setProperty("init", Boolean.TRUE);
121                 while ((line = reader.readLine()) != null) {
122                     // System.out.println(line);
123                     script.setProperty("line", line);
124                     Object o = script.run();
125                     script.setProperty("init", Boolean.FALSE);
126                     if (o != null) {
127                         if ("success".equals(o)) {
128                             break; // to close sockets gracefully etc...
129                         } else {
130                             if (autoOutput) {
131                                 writer.println(o);
132                             }
133                         }
134                     }
135                     writer.flush();
136                 }
137             } catch (IOException e) {
138                 e.printStackTrace();
139             } finally {
140                 try {
141                     writer.flush();
142                     writer.close();
143                 } finally {
144                     try {
145                         socket.close();
146                     } catch (IOException e3) {
147                         e3.printStackTrace();
148                     }
149                 }
150             }
151         }
152     }
153 }