1 /*
2 $Id: GroovySocketServer.java,v 1.7 2005/06/10 14:05:02 cstein 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 package groovy.ui;
47
48 import groovy.lang.GroovyShell;
49 import groovy.lang.Script;
50
51 import java.io.BufferedReader;
52 import java.io.FileInputStream;
53 import java.io.IOException;
54 import java.io.InputStreamReader;
55 import java.io.PrintWriter;
56 import java.net.InetAddress;
57 import java.net.ServerSocket;
58 import java.net.Socket;
59 import java.net.URL;
60
61 /***
62 * Simple server that executes supplied script against a socket
63 * @author Jeremy Rayner
64 */
65
66 public class GroovySocketServer implements Runnable {
67 private URL url;
68 private GroovyShell groovy;
69 private boolean isScriptFile;
70 private String scriptFilenameOrText;
71 private boolean autoOutput;
72
73 public GroovySocketServer(GroovyShell groovy, boolean isScriptFile, String scriptFilenameOrText, boolean autoOutput, int port) {
74 this.groovy = groovy;
75 this.isScriptFile = isScriptFile;
76 this.scriptFilenameOrText = scriptFilenameOrText;
77 this.autoOutput = autoOutput;
78 try {
79 url = new URL("http", InetAddress.getLocalHost().getHostAddress(), port, "/");
80 System.out.println("groovy is listening on port " + port);
81 } catch (IOException e) {
82 e.printStackTrace();
83 }
84 new Thread(this).start();
85 }
86
87 public void run() {
88 try {
89 ServerSocket serverSocket = new ServerSocket(url.getPort());
90 while (true) {
91 // Create one script per socket connection.
92 // This is purposefully not caching the Script
93 // so that the script source file can be changed on the fly,
94 // as each connection is made to the server.
95 Script script;
96 if (isScriptFile) {
97 GroovyMain gm = new GroovyMain();
98 script = groovy.parse(new FileInputStream(gm.huntForTheScriptFile(scriptFilenameOrText)));
99 } else {
100 script = groovy.parse(scriptFilenameOrText);
101 }
102 new GroovyClientConnection(script, autoOutput, serverSocket.accept());
103 }
104 } catch (Exception e) {
105 e.printStackTrace();
106 }
107 }
108
109 class GroovyClientConnection implements Runnable {
110 private Script script;
111 private Socket socket;
112 private BufferedReader reader;
113 private PrintWriter writer;
114 private boolean autoOutputFlag;
115
116 GroovyClientConnection(Script script, boolean autoOutput,Socket socket) throws IOException {
117 this.script = script;
118 this.autoOutputFlag = autoOutput;
119 this.socket = socket;
120 reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
121 writer = new PrintWriter(socket.getOutputStream());
122 new Thread(this, "Groovy client connection - " + socket.getInetAddress().getHostAddress()).start();
123 }
124 public void run() {
125 try {
126 String line = null;
127 script.setProperty("out", writer);
128 script.setProperty("socket", socket);
129 script.setProperty("init", Boolean.TRUE);
130 while ((line = reader.readLine()) != null) {
131 // System.out.println(line);
132 script.setProperty("line", line);
133 Object o = script.run();
134 script.setProperty("init", Boolean.FALSE);
135 if (o != null) {
136 if ("success".equals(o)) {
137 break; // to close sockets gracefully etc...
138 } else {
139 if (autoOutputFlag) {
140 writer.println(o);
141 }
142 }
143 }
144 writer.flush();
145 }
146 } catch (IOException e) {
147 e.printStackTrace();
148 } finally {
149 try {
150 writer.flush();
151 writer.close();
152 } finally {
153 try {
154 socket.close();
155 } catch (IOException e3) {
156 e3.printStackTrace();
157 }
158 }
159 }
160 }
161 }
162 }