001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.image;
016    
017    import com.liferay.portal.kernel.image.Ghostscript;
018    import com.liferay.portal.kernel.image.ImageMagickUtil;
019    import com.liferay.portal.kernel.log.Log;
020    import com.liferay.portal.kernel.log.LogFactoryUtil;
021    import com.liferay.portal.kernel.process.ProcessUtil;
022    import com.liferay.portal.kernel.util.OSDetector;
023    import com.liferay.portal.kernel.util.StringBundler;
024    
025    import java.io.File;
026    import java.io.FileNotFoundException;
027    
028    import java.util.LinkedList;
029    import java.util.List;
030    import java.util.concurrent.Future;
031    
032    import jodd.util.StringPool;
033    
034    /**
035     * @author Ivica Cardic
036     */
037    public class GhostscriptImpl implements Ghostscript {
038    
039            public Future<?> execute(List<String> commandArguments) throws Exception {
040                    if (!isEnabled()) {
041                            StringBundler sb = new StringBundler(5);
042    
043                            sb.append("Cannot execute the Ghostscript command. Please install");
044                            sb.append("ImageMagick and Ghostscript and enable ImageMagick in ");
045                            sb.append("portal-ext.properties or in the Server Administration ");
046                            sb.append("control panel at: http://<server>/group/control_panel/");
047                            sb.append("manage/-/server/external-services");
048    
049                            throw new IllegalStateException(sb.toString());
050                    }
051    
052                    LinkedList<String> arguments = new LinkedList<String>();
053    
054                    arguments.add(_commandPath);
055                    arguments.add("-dBATCH");
056                    arguments.add("-dSAFER");
057                    arguments.add("-dNOPAUSE");
058                    arguments.add("-dNOPROMPT");
059                    arguments.add("-sFONTPATH" + _globalSearchPath);
060                    arguments.addAll(commandArguments);
061    
062                    if (_log.isInfoEnabled()) {
063                            StringBundler sb = new StringBundler(arguments.size() * 2);
064    
065                            for (String argument : arguments) {
066                                    sb.append(argument);
067                                    sb.append(StringPool.SPACE);
068                            }
069    
070                            _log.info("Excecuting command '" + sb.toString() + "'");
071                    }
072    
073                    return ProcessUtil.execute(
074                            ProcessUtil.LOGGING_OUTPUT_PROCESSOR, arguments);
075            }
076    
077            public boolean isEnabled() {
078                    return ImageMagickUtil.isEnabled();
079            }
080    
081            public void reset() {
082                    if (isEnabled()) {
083                            try {
084                                    _globalSearchPath = ImageMagickUtil.getGlobalSearchPath();
085    
086                                    _commandPath = getCommandPath();
087                            }
088                            catch (Exception e) {
089                                    _log.warn(e, e);
090                            }
091                    }
092            }
093    
094            protected String getCommandPath() throws Exception {
095                    String commandPath = null;
096    
097                    if (OSDetector.isWindows()) {
098                            commandPath = getCommandPathWindows();
099                    }
100                    else {
101                            commandPath = getCommandPathUnix();
102                    }
103    
104                    if (commandPath == null) {
105                            throw new FileNotFoundException(
106                                    "Unable to find Ghostscript command");
107                    }
108    
109                    return commandPath;
110            }
111    
112            protected String getCommandPathUnix() throws Exception {
113                    String[] dirNames = _globalSearchPath.split(File.pathSeparator);
114    
115                    for (String dirName : dirNames) {
116                            File file = new File(dirName, _GHOSTSCRIPT_COMMAND_UNIX);
117    
118                            if (file.exists()) {
119                                    return file.getCanonicalPath();
120                            }
121                    }
122    
123                    return null;
124            }
125    
126            protected String getCommandPathWindows() throws Exception {
127                    String[] dirNames = _globalSearchPath.split(File.pathSeparator);
128    
129                    for (String dirName : dirNames) {
130                            for (String command : _GHOSTSCRIPT_COMMAND_WINDOWS) {
131                                    File file = new File(dirName, command + ".exe");
132    
133                                    if (!file.exists()) {
134                                            file = new File(dirName, command + ".cmd");
135    
136                                            if (!file.exists()) {
137                                                    file = new File(dirName, command + ".bat");
138    
139                                                    if (!file.exists()) {
140                                                            continue;
141                                                    }
142                                            }
143                                    }
144    
145                                    return file.getCanonicalPath();
146                            }
147                    }
148    
149                    return null;
150            }
151    
152            private static final String _GHOSTSCRIPT_COMMAND_UNIX = "gs";
153    
154            private static final String[] _GHOSTSCRIPT_COMMAND_WINDOWS = {
155                    "gswin32c", "gswin64c"
156            };
157    
158            private static Log _log = LogFactoryUtil.getLog(GhostscriptImpl.class);
159    
160            private String _commandPath;
161            private String _globalSearchPath;
162    
163    }