Java tutorial
package at.ac.tuwien.ims.latex2mobiformulaconv.converter.html2mobi; import org.apache.commons.cli.Option; import org.apache.commons.exec.*; import org.apache.commons.io.output.WriterOutputStream; import org.apache.log4j.Logger; import java.io.File; import java.io.IOException; import java.io.StringWriter; import java.nio.charset.Charset; import java.nio.file.Path; import java.nio.file.Paths; /* * The MIT License (MIT) * latex2mobi -- LaTeX Formulas to Mobi Converter * Copyright (c) 2014 Michael Au * <p/> * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * <p/> * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * <p/> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * <p/> * <p/> * For Third Party Software Licenses read LICENSE file in base dir. */ /** * Converts HTML to Mobi by using the Calibre CLI tool "ebook-convert" * * @author Michael Au * Created: 21.05.14 00:12 */ public class CalibreHtmlToMobiConverter implements HtmlToMobiConverter { private static final Logger logger = Logger.getLogger(CalibreHtmlToMobiConverter.class); private static String command = "ebook-convert"; private Path execPath = null; @Override public File convertToMobi(File htmlFile) { logger.debug("Enter convertToMobi()..."); if (htmlFile == null) { logger.error("Document is null, aborting..."); System.exit(1); } CommandLine cmdLine; if (execPath != null) { // Run the configured calibre ebook-convert executable logger.info("Calibre ebook-convert will be run from: " + execPath.toString()); cmdLine = new CommandLine(execPath.toFile()); } else { // Run in system PATH environment logger.info("Calibre ebook-convert will be run within the PATH variable."); cmdLine = new CommandLine(command); } // cli command: ebook-convert input_file.html output_file.mobi --mobi-file-type=new // Run configuration cmdLine.addArgument(Paths.get(htmlFile.toURI()).toAbsolutePath().toString()); String mobiFilename = htmlFile.getName().toString().replace(".html", ".mobi").toString(); Path tempMobiFilepath = Paths.get(htmlFile.toURI()).getParent().resolve(mobiFilename); logger.debug("Mobi output file: " + tempMobiFilepath.toAbsolutePath().toString()); cmdLine.addArgument(tempMobiFilepath.toAbsolutePath().toString()); // Output will be in format "KF8" only, old format does not allow external CSS files cmdLine.addArgument("--mobi-file-type=new"); DefaultExecuteResultHandler resultHandler = new DefaultExecuteResultHandler(); ExecuteWatchdog watchdog = new ExecuteWatchdog(60 * 1000); Executor executor = new DefaultExecutor(); executor.setExitValue(1); executor.setWatchdog(watchdog); StringWriter writer = new StringWriter(); WriterOutputStream writerOutputStream = new WriterOutputStream(writer, Charset.forName("UTF-8")); ExecuteStreamHandler calibreStreamHandler = new PumpStreamHandler(writerOutputStream, System.err); executor.setStreamHandler(calibreStreamHandler); logger.debug("Launching calibres ebook-convert:"); logger.debug(cmdLine.toString()); try { executor.execute(cmdLine, resultHandler); } catch (IOException e) { logger.error("calibres ebook-convert failed to execute:"); logger.error(e.getMessage(), e); System.exit(-1); } try { resultHandler.waitFor(); int exitValue = resultHandler.getExitValue(); logger.debug("calibre ebook-converts execution's exit value: " + exitValue); ExecuteException executeException = resultHandler.getException(); if (executeException != null && executeException.getCause() != null) { String exceptionKlass = executeException.getCause().getClass().getCanonicalName(); String exceptionMessage = executeException.getCause().getMessage(); if (exceptionKlass.endsWith("IOException") || exceptionMessage.contains("Cannot run program \"ebook-convert\"")) { logger.error("calibres ebook-convert could not be run! Exiting..."); logger.debug(executeException); System.exit(1); } logger.debug(exceptionKlass + ": " + exceptionMessage); } } catch (InterruptedException e) { logger.error("calibre ebook-converts execution got interrupted: "); logger.error(e.getMessage(), e); } String output = ""; try { output += writer.getBuffer().toString(); writer.close(); } catch (IOException e) { logger.error("Error reading calibre ebook-converts output from buffer:"); logger.error(e.getMessage(), e); } logger.debug("Calibre ebook-convert output: \n" + output); return tempMobiFilepath.toFile(); } @Override public Option getExecOption() { return new Option("c", "calibre-exec", true, "Calibre executable location"); } @Override public void setExecPath(Path execPath) { this.execPath = execPath; } }