Java tutorial
/** * Copyright (c) 2008-2014 Regents of the University of California (Regents). * Created by WISE, Graduate School of Education, University of California, Berkeley. * * This software is distributed under the GNU General Public License, v3, * or (at your option) any later version. * * Permission is hereby granted, without written agreement and without license * or royalty fees, to use, copy, modify, and distribute this software and its * documentation for any purpose, provided that the above copyright notice and * the following two paragraphs appear in all copies of this software. * * REGENTS SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE. THE SOFTWAREAND ACCOMPANYING DOCUMENTATION, IF ANY, PROVIDED * HEREUNDER IS PROVIDED "AS IS". REGENTS HAS NO OBLIGATION TO PROVIDE * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. * * IN NO EVENT SHALL REGENTS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF * REGENTS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ package org.wise.portal.service.wiseup.impl; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.URL; import java.net.URLConnection; import java.util.Calendar; import java.util.Enumeration; import java.util.HashSet; import java.util.Properties; import java.util.Set; import java.util.zip.ZipEntry; import java.util.zip.ZipFile; import org.apache.commons.io.FileUtils; import org.json.JSONObject; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.wise.portal.domain.module.Curnit; import org.wise.portal.domain.module.impl.CreateUrlModuleParameters; import org.wise.portal.domain.project.Project; import org.wise.portal.domain.project.ProjectMetadata; import org.wise.portal.domain.project.impl.ProjectMetadataImpl; import org.wise.portal.domain.project.impl.ProjectParameters; import org.wise.portal.domain.project.impl.ProjectType; import org.wise.portal.domain.user.User; import org.wise.portal.service.module.CurnitService; import org.wise.portal.service.project.ProjectService; import org.wise.portal.service.wiseup.WiseUpService; /** * @author Hiroki Terashima * @version $Id:$ */ @Service public class WiseUpServiceImpl implements WiseUpService { @Autowired private ProjectService projectService; @Autowired private CurnitService curnitService; @Autowired private Properties wiseProperties; private String wiseUpHubUrl = "http://wise4.org"; /** * @throws Exception * @see org.wise.portal.service.wiseup.WiseUpService#importExternalProject(net.sf.sail.webapp.domain.User, java.lang.String, java.lang.String) */ @Override public void importExternalProject(User newProjectOwner, String externalWiseInstanceId, String externalWiseProjectId) throws Exception { String exportProjectPath = wiseUpHubUrl + "/projectLibrary/exportProject.php" + "?wiseInstanceId=" + externalWiseInstanceId + "&wiseProjectId=" + externalWiseProjectId; // upload the zipfile to curriculum_base_dir String curriculumBaseDir = wiseProperties.getProperty("curriculum_base_dir"); File uploadDir = new File(curriculumBaseDir); if (!uploadDir.exists()) { throw new Exception("curriculum upload directory does not exist."); } // save the downloaded zip file temporarily in the curriculum folder. String sep = System.getProperty("file.separator"); long timeInMillis = Calendar.getInstance().getTimeInMillis(); String filename = ""; String newFilename = ""; String newFileFullPath = ""; File downloadedFile = null; try { URL url = new URL(exportProjectPath); URLConnection conn = url.openConnection(); InputStream in = conn.getInputStream(); URL downloadFileUrl = conn.getURL(); String downloadFileUrlString = downloadFileUrl.toString(); filename = downloadFileUrlString.substring(downloadFileUrlString.lastIndexOf("/") + 1, downloadFileUrlString.indexOf(".zip")); newFilename = filename; if (new File(curriculumBaseDir + sep + filename).exists()) { // if this directory already exists, add a date time in milliseconds to the filename to make it unique newFilename = filename + "-" + timeInMillis; } newFileFullPath = curriculumBaseDir + sep + newFilename + ".zip"; downloadedFile = new File(newFileFullPath); FileOutputStream out = new FileOutputStream(downloadedFile); byte[] b = new byte[1024]; int count; while ((count = in.read(b)) >= 0) { out.write(b, 0, count); } out.flush(); out.close(); in.close(); } catch (IOException e) { e.printStackTrace(); } // make a new folder where the contents of the zip should go String newFileFullDir = curriculumBaseDir + sep + newFilename; File newFileFullDirFile = new File(newFileFullDir); newFileFullDirFile.mkdir(); // unzip the zip file try { ZipFile zipFile = new ZipFile(newFileFullPath); Enumeration entries = zipFile.entries(); int i = 0; // index used later to check for first folder in the zip file while (entries.hasMoreElements()) { ZipEntry entry = (ZipEntry) entries.nextElement(); if (entry.getName().startsWith("__MACOSX")) { // if this entry starts with __MACOSX, this zip file was created by a user using mac's "compress" feature. // ignore it. continue; } if (entry.isDirectory()) { // first check to see if the user has changed the zip file name and therefore the zipfile name // is no longer the same as the name of the first folder in the top-level of the zip file. // if this is the case, import will fail, so throw an error. if (i == 0) { if (!entry.getName().startsWith(filename)) { throw new Exception( "Zip file name does not match folder name. Do not change zip filename"); } i++; } // Assume directories are stored parents first then children. System.out.println("Extracting directory: " + entry.getName()); // This is not robust, just for demonstration purposes. (new File(entry.getName().replace(filename, newFileFullDir))).mkdir(); continue; } System.out.println("Extracting file: " + entry.getName()); copyInputStream(zipFile.getInputStream(entry), new BufferedOutputStream( new FileOutputStream(entry.getName().replaceFirst(filename, newFileFullDir)))); } zipFile.close(); } catch (IOException ioe) { System.err.println("Unhandled exception during project import. Project was not properly imported."); ioe.printStackTrace(); throw ioe; } // remove the temp zip file downloadedFile.delete(); // now create a project in the db with the new path String path = sep + newFilename + sep + "wise4.project.json"; String name = "hiroki's project 4.zip"; Set<User> owners = new HashSet<User>(); owners.add(newProjectOwner); CreateUrlModuleParameters cParams = new CreateUrlModuleParameters(); cParams.setUrl(path); Curnit curnit = curnitService.createCurnit(cParams); ProjectParameters pParams = new ProjectParameters(); pParams.setCurnitId(curnit.getId()); pParams.setOwners(owners); pParams.setProjectname(name); pParams.setProjectType(ProjectType.LD); ProjectMetadata metadata = null; // see if a file called wise4.project-meta.json exists. if yes, try parsing it. try { String projectMetadataFilePath = newFileFullDir + sep + "wise4.project-meta.json"; String projectMetadataStr = FileUtils.readFileToString(new File(projectMetadataFilePath)); JSONObject metadataJSONObj = new JSONObject(projectMetadataStr); metadata = new ProjectMetadataImpl(); metadata.populateFromJSON(metadataJSONObj); } catch (Exception e) { // if there is any error during the parsing of the metadata, set the metadata to null metadata = null; } // If metadata is null at this point, either wise4.project-meta.json was not // found in the zip file, or there was an error parsing. // Set a new fresh metadata object if (metadata == null) { metadata = new ProjectMetadataImpl(); metadata.setTitle(name); } pParams.setMetadata(metadata); Project project = projectService.createProject(pParams); } public static final void copyInputStream(InputStream in, OutputStream out) throws IOException { byte[] buffer = new byte[1024]; int len; while ((len = in.read(buffer)) >= 0) out.write(buffer, 0, len); in.close(); out.close(); } }