001 /*
002 $Id: GroovySocketServer.java,v 1.7 2005/06/10 14:05:02 cstein Exp $
003
004 Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005
006 Redistribution and use of this software and associated documentation
007 ("Software"), with or without modification, are permitted provided
008 that the following conditions are met:
009
010 1. Redistributions of source code must retain copyright
011 statements and notices. Redistributions must also contain a
012 copy of this document.
013
014 2. Redistributions in binary form must reproduce the
015 above copyright notice, this list of conditions and the
016 following disclaimer in the documentation and/or other
017 materials provided with the distribution.
018
019 3. The name "groovy" must not be used to endorse or promote
020 products derived from this Software without prior written
021 permission of The Codehaus. For written permission,
022 please contact info@codehaus.org.
023
024 4. Products derived from this Software may not be called "groovy"
025 nor may "groovy" appear in their names without prior written
026 permission of The Codehaus. "groovy" is a registered
027 trademark of The Codehaus.
028
029 5. Due credit should be given to The Codehaus -
030 http://groovy.codehaus.org/
031
032 THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033 ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034 NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
036 THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043 OF THE POSSIBILITY OF SUCH DAMAGE.
044
045 */
046 package groovy.ui;
047
048 import groovy.lang.GroovyShell;
049 import groovy.lang.Script;
050
051 import java.io.BufferedReader;
052 import java.io.FileInputStream;
053 import java.io.IOException;
054 import java.io.InputStreamReader;
055 import java.io.PrintWriter;
056 import java.net.InetAddress;
057 import java.net.ServerSocket;
058 import java.net.Socket;
059 import java.net.URL;
060
061 /**
062 * Simple server that executes supplied script against a socket
063 * @author Jeremy Rayner
064 */
065
066 public class GroovySocketServer implements Runnable {
067 private URL url;
068 private GroovyShell groovy;
069 private boolean isScriptFile;
070 private String scriptFilenameOrText;
071 private boolean autoOutput;
072
073 public GroovySocketServer(GroovyShell groovy, boolean isScriptFile, String scriptFilenameOrText, boolean autoOutput, int port) {
074 this.groovy = groovy;
075 this.isScriptFile = isScriptFile;
076 this.scriptFilenameOrText = scriptFilenameOrText;
077 this.autoOutput = autoOutput;
078 try {
079 url = new URL("http", InetAddress.getLocalHost().getHostAddress(), port, "/");
080 System.out.println("groovy is listening on port " + port);
081 } catch (IOException e) {
082 e.printStackTrace();
083 }
084 new Thread(this).start();
085 }
086
087 public void run() {
088 try {
089 ServerSocket serverSocket = new ServerSocket(url.getPort());
090 while (true) {
091 // Create one script per socket connection.
092 // This is purposefully not caching the Script
093 // so that the script source file can be changed on the fly,
094 // as each connection is made to the server.
095 Script script;
096 if (isScriptFile) {
097 GroovyMain gm = new GroovyMain();
098 script = groovy.parse(new FileInputStream(gm.huntForTheScriptFile(scriptFilenameOrText)));
099 } 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 }