001    /**
002     * Copyright (c) 2000-2013 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("section of the Control Panel at: ");
047                            sb.append("http://<server>/group/control_panel/manage/-/server/");
048                            sb.append("external-services");
049    
050                            throw new IllegalStateException(sb.toString());
051                    }
052    
053                    LinkedList<String> arguments = new LinkedList<String>();
054    
055                    arguments.add(_commandPath);
056                    arguments.add("-dBATCH");
057                    arguments.add("-dSAFER");
058                    arguments.add("-dNOPAUSE");
059                    arguments.add("-dNOPROMPT");
060                    arguments.add("-sFONTPATH" + _globalSearchPath);
061                    arguments.addAll(commandArguments);
062    
063                    if (_log.isInfoEnabled()) {
064                            StringBundler sb = new StringBundler(arguments.size() * 2);
065    
066                            for (String argument : arguments) {
067                                    sb.append(argument);
068                                    sb.append(StringPool.SPACE);
069                            }
070    
071                            _log.info("Excecuting command '" + sb.toString() + "'");
072                    }
073    
074                    return ProcessUtil.execute(
075                            ProcessUtil.LOGGING_OUTPUT_PROCESSOR, arguments);
076            }
077    
078            public boolean isEnabled() {
079                    return ImageMagickUtil.isEnabled();
080            }
081    
082            public void reset() {
083                    if (isEnabled()) {
084                            try {
085                                    _globalSearchPath = ImageMagickUtil.getGlobalSearchPath();
086    
087                                    _commandPath = getCommandPath();
088                            }
089                            catch (Exception e) {
090                                    _log.error(e, e);
091                            }
092                    }
093            }
094    
095            protected String getCommandPath() throws Exception {
096                    String commandPath = null;
097    
098                    if (OSDetector.isWindows()) {
099                            commandPath = getCommandPathWindows();
100                    }
101                    else {
102                            commandPath = getCommandPathUnix();
103                    }
104    
105                    if (commandPath == null) {
106                            StringBundler sb = new StringBundler(4);
107    
108                            sb.append("Unable to find the Ghostscript command. Please verify ");
109                            sb.append("the path specified in the Server Administration ");
110                            sb.append("control panel at: http://<server>/group/control_panel/");
111                            sb.append("manage/-/server/external-services");
112    
113                            throw new FileNotFoundException(sb.toString());
114                    }
115    
116                    return commandPath;
117            }
118    
119            protected String getCommandPathUnix() throws Exception {
120                    String[] dirNames = _globalSearchPath.split(File.pathSeparator);
121    
122                    for (String dirName : dirNames) {
123                            File file = new File(dirName, _GHOSTSCRIPT_COMMAND_UNIX);
124    
125                            if (file.exists()) {
126                                    return file.getCanonicalPath();
127                            }
128                    }
129    
130                    return null;
131            }
132    
133            protected String getCommandPathWindows() throws Exception {
134                    String[] dirNames = _globalSearchPath.split(File.pathSeparator);
135    
136                    for (String dirName : dirNames) {
137                            for (String command : _GHOSTSCRIPT_COMMAND_WINDOWS) {
138                                    File file = new File(dirName, command + ".exe");
139    
140                                    if (!file.exists()) {
141                                            file = new File(dirName, command + ".cmd");
142    
143                                            if (!file.exists()) {
144                                                    file = new File(dirName, command + ".bat");
145    
146                                                    if (!file.exists()) {
147                                                            continue;
148                                                    }
149                                            }
150                                    }
151    
152                                    return file.getCanonicalPath();
153                            }
154                    }
155    
156                    return null;
157            }
158    
159            private static final String _GHOSTSCRIPT_COMMAND_UNIX = "gs";
160    
161            private static final String[] _GHOSTSCRIPT_COMMAND_WINDOWS = {
162                    "gswin32c", "gswin64c"
163            };
164    
165            private static Log _log = LogFactoryUtil.getLog(GhostscriptImpl.class);
166    
167            private String _commandPath;
168            private String _globalSearchPath;
169    
170    }