/*
* Syncany, www.syncany.org
* Copyright (C) 2011-2014 Philipp C. Heckel <philipp.heckel@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.syncany.operations.plugin;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.jar.JarInputStream;
import java.util.jar.Manifest;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.simpleframework.xml.core.Persister;
import org.syncany.Client;
import org.syncany.config.Config;
import org.syncany.config.LocalEventBus;
import org.syncany.config.UserConfig;
import org.syncany.crypto.CipherUtil;
import org.syncany.operations.Operation;
import org.syncany.operations.daemon.messages.PluginConnectToHostExternalEvent;
import org.syncany.operations.daemon.messages.PluginInstallExternalEvent;
import org.syncany.operations.plugin.PluginOperationOptions.PluginAction;
import org.syncany.operations.plugin.PluginOperationOptions.PluginListMode;
import org.syncany.operations.plugin.PluginOperationResult.PluginResultCode;
import org.syncany.plugins.Plugin;
import org.syncany.plugins.Plugins;
import org.syncany.util.EnvironmentUtil;
import org.syncany.util.FileUtil;
import org.syncany.util.StringUtil;
import com.github.zafarkhaja.semver.Version;
/**
* The plugin operation installs, removes and lists storage {@link Plugin}s.
*
* <p>The plugin implements these three functionalities as different
* {@link PluginAction}:
*
* <ul>
* <li><tt>INSTALL</tt>: Installation means copying a file to the user plugin directory
* as specified by {@link Client#getUserPluginLibDir()}. A plugin can be installed
* from a local JAR file, a URL (the operation downloads a JAR file), or the
* API host (the operation find the plugin using the 'list' action and downloads
* the JAR file).</li>
* <li><tt>REMOVE</tt>: Removal means deleting a JAR file from the user plugin
* directoryThis action. This action simply finds the responsible plugin JAR
* file and deletes it. Only JAR files inside the user plugin direcory can be
* deleted.</li>
* <li><tt>LIST</tt>: Listing refers to a local and a remote list. The locally installed
* plugins can be queried by {@link Plugins#list()}. These plugins' JAR files must be
* in the application's class path. Remotely available plugins are queried through the
* API.</li>
* </ul>
*
* @author Philipp C. Heckel <philipp.heckel@gmail.com>
*/
public class PluginOperation extends Operation {
private static final Logger logger = Logger.getLogger(PluginOperation.class.getSimpleName());
private static final String PLUGIN_LIST_URL = "https://api.syncany.org/v2/plugins/list?appVersion=%s&snapshots=%s&pluginId=%s&os=%s&arch=%s";
private static final String PURGEFILE_FILENAME = "purgefile";
private PluginOperationOptions options;
private PluginOperationResult result;
private LocalEventBus eventBus;
public PluginOperation(Config config, PluginOperationOptions options) {
super(config);
this.options = options;
this.result = new PluginOperationResult();
this.eventBus = LocalEventBus.getInstance();
}
@Override
public PluginOperationResult execute() throws Exception {
switch (options.getAction()) {
case LIST:
return executeList();
case INSTALL:
return executeInstall();
case REMOVE:
return executeRemove();
default:
throw new Exception("Unknown action: " + options.getAction());
}
}
private PluginOperationResult executeRemove() throws Exception {
String pluginId = options.getPluginId();
Plugin plugin = Plugins.get(pluginId);
if (plugin == null) {
throw new Exception("Plugin not installed.");
}
File pluginJarFile = getJarFile(plugin);
boolean canUninstall = canUninstall(pluginJarFile);
if (canUninstall) {
PluginInfo pluginInfo = readPluginInfoFromJar(pluginJarFile);
logger.log(Level.INFO, "Uninstalling plugin from file " + pluginJarFile);
pluginJarFile.delete();
// JAR files are locked on Windows, adding JAR filename to a list for delayed deletion (by batch file)
if (EnvironmentUtil.isWindows()) {
File purgefilePath = new File(UserConfig.getUserConfigDir(), PURGEFILE_FILENAME);
try (PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(purgefilePath, true)))) {
out.println(pluginJarFile.getAbsolutePath());
}
catch (IOException e) {
logger.log(Level.SEVERE, "Unable to append to purgefile " + purgefilePath, e);
}
}
result.setSourcePluginPath(pluginJarFile.getAbsolutePath());
result.setAffectedPluginInfo(pluginInfo);
result.setResultCode(PluginResultCode.OK);
}
else {
logger.log(Level.INFO, "Plugin can NOT be uninstalled because class location not in " + UserConfig.getUserPluginLibDir());
result.setResultCode(PluginResultCode.NOK);
}
return result;
}
private boolean canUninstall(File pluginJarFile) {
File globalUserPluginDir = UserConfig.getUserPluginLibDir();
boolean canUninstall = pluginJarFile != null && pluginJarFile.getAbsolutePath().startsWith(globalUserPluginDir.getAbsolutePath());
return canUninstall;
}
private File getJarFile(Plugin plugin) {
Class<? extends Plugin> pluginClass = plugin.getClass();
URL pluginClassLocation = pluginClass.getResource('/' + pluginClass.getName().replace('.', '/') + ".class");
String pluginClassLocationStr = pluginClassLocation.toString();
logger.log(Level.INFO, "Plugin class is at " + pluginClassLocationStr);
if (pluginClassLocationStr.startsWith("jar:file:")) {
int indexStartAfterSchema = "jar:file:".length();
int indexEndAtExclamationPoint = pluginClassLocationStr.indexOf("!");
File pluginJarFile = new File(pluginClassLocationStr.substring(indexStartAfterSchema, indexEndAtExclamationPoint));
logger.log(Level.INFO, "Plugin is in JAR at " + pluginJarFile);
return pluginJarFile;
}
else {
logger.log(Level.INFO, "Plugin is not in a JAR file. Probably in test environment.");
return null;
}
}
private PluginOperationResult executeInstall() throws Exception {
String pluginId = options.getPluginId();
File potentialLocalPluginJarFile = new File(pluginId);
if (pluginId.matches("^https?://.+")) {
return executeInstallFromUrl(pluginId);
}
else if (potentialLocalPluginJarFile.exists()) {
return executeInstallFromLocalFile(potentialLocalPluginJarFile);
}
else {
return executeInstallFromApiHost(pluginId);
}
}
private PluginOperationResult executeInstallFromApiHost(String pluginId) throws Exception {
checkPluginNotInstalled(pluginId);
PluginInfo pluginInfo = getRemotePluginInfo(pluginId);
if (pluginInfo == null) {
throw new Exception("Plugin with ID '" + pluginId + "' not found");
}
checkPluginCompatibility(pluginInfo);
eventBus.post(new PluginInstallExternalEvent(pluginInfo.getDownloadUrl()));
File tempPluginJarFile = downloadPluginJar(pluginInfo.getDownloadUrl());
String expectedChecksum = pluginInfo.getSha256sum();
String actualChecksum = calculateChecksum(tempPluginJarFile);
if (expectedChecksum == null || !expectedChecksum.equals(actualChecksum)) {
throw new Exception("Checksum mismatch. Expected: " + expectedChecksum + ", but was: " + actualChecksum);
}
logger.log(Level.INFO, "Plugin JAR checksum verified: " + actualChecksum);
File targetPluginJarFile = installPlugin(tempPluginJarFile, pluginInfo);
result.setSourcePluginPath(pluginInfo.getDownloadUrl());
result.setTargetPluginPath(targetPluginJarFile.getAbsolutePath());
result.setAffectedPluginInfo(pluginInfo);
result.setResultCode(PluginResultCode.OK);
return result;
}
private void checkPluginCompatibility(PluginInfo pluginInfo) throws Exception {
Version applicationVersion = Version.valueOf(Client.getApplicationVersion());
Version pluginAppMinVersion = Version.valueOf(pluginInfo.getPluginAppMinVersion());
logger.log(Level.INFO, "Checking plugin compatibility:");
logger.log(Level.INFO, "- Application version: " + Client.getApplicationVersion() + "(" + applicationVersion + ")");
logger.log(Level.INFO, "- Plugin min. application version: " + pluginInfo.getPluginAppMinVersion() + "(" + pluginAppMinVersion + ")");
if (!applicationVersion.greaterThanOrEqualTo(pluginAppMinVersion)) {
throw new Exception("Plugin is incompatible to this application version. Plugin min. application version is "
+ pluginInfo.getPluginAppMinVersion() + ", current application version is " + Client.getApplicationVersion());
}
// Verify if any conflicting plugins are installed
logger.log(Level.INFO, "Checking for conflicting plugins.");
List<String> conflictingIds = pluginInfo.getConflictingPluginIds();
List<String> conflictingInstalledIds = new ArrayList<String>();
if (conflictingIds != null) {
for (String pluginId : conflictingIds) {
Plugin plugin = Plugins.get(pluginId);
if (plugin != null) {
logger.log(Level.INFO, "- Conflicting plugin " + pluginId + " found.");
conflictingInstalledIds.add(pluginId);
}
logger.log(Level.FINE, "- Conflicting plugin " + pluginId + " not installed");
}
}
result.setConflictingPlugins(conflictingInstalledIds);
}
private String calculateChecksum(File tempPluginJarFile) throws Exception {
CipherUtil.enableUnlimitedStrength();
byte[] actualChecksum = FileUtil.createChecksum(tempPluginJarFile, "SHA256");
return StringUtil.toHex(actualChecksum);
}
private PluginOperationResult executeInstallFromLocalFile(File pluginJarFile) throws Exception {
eventBus.post(new PluginInstallExternalEvent(pluginJarFile.getAbsolutePath()));
PluginInfo pluginInfo = readPluginInfoFromJar(pluginJarFile);
checkPluginNotInstalled(pluginInfo.getPluginId());
checkPluginCompatibility(pluginInfo);
File targetPluginJarFile = installPlugin(pluginJarFile, pluginInfo);
result.setSourcePluginPath(pluginJarFile.getPath());
result.setTargetPluginPath(targetPluginJarFile.getPath());
result.setAffectedPluginInfo(pluginInfo);
result.setResultCode(PluginResultCode.OK);
return result;
}
private PluginOperationResult executeInstallFromUrl(String downloadJarUrl) throws Exception {
eventBus.post(new PluginInstallExternalEvent(downloadJarUrl));
File tempPluginJarFile = downloadPluginJar(downloadJarUrl);
PluginInfo pluginInfo = readPluginInfoFromJar(tempPluginJarFile);
checkPluginNotInstalled(pluginInfo.getPluginId());
checkPluginCompatibility(pluginInfo);
File targetPluginJarFile = installPlugin(tempPluginJarFile, pluginInfo);
result.setSourcePluginPath(downloadJarUrl);
result.setTargetPluginPath(targetPluginJarFile.getPath());
result.setAffectedPluginInfo(pluginInfo);
result.setResultCode(PluginResultCode.OK);
return result;
}
private void checkPluginNotInstalled(String pluginId) throws Exception {
Plugin locallyInstalledPlugin = Plugins.get(pluginId);
if (locallyInstalledPlugin != null) {
throw new Exception("Plugin '" + pluginId + "' already installed. Use 'sy plugin remove " + pluginId + "' to uninstall it first.");
}
logger.log(Level.INFO, "Plugin '" + pluginId + "' not installed. Okay!");
}
private PluginInfo readPluginInfoFromJar(File pluginJarFile) throws Exception {
try (JarInputStream jarStream = new JarInputStream(new FileInputStream(pluginJarFile))) {
Manifest jarManifest = jarStream.getManifest();
if (jarManifest == null) {
throw new Exception("Given file is not a valid Syncany plugin file (not a JAR file, or no manifest).");
}
String pluginId = jarManifest.getMainAttributes().getValue("Plugin-Id");
if (pluginId == null) {
throw new Exception("Given file is not a valid Syncany plugin file (no plugin ID in manifest).");
}
PluginInfo pluginInfo = new PluginInfo();
pluginInfo.setPluginId(pluginId);
pluginInfo.setPluginName(jarManifest.getMainAttributes().getValue("Plugin-Name"));
pluginInfo.setPluginVersion(jarManifest.getMainAttributes().getValue("Plugin-Version"));
pluginInfo.setPluginDate(jarManifest.getMainAttributes().getValue("Plugin-Date"));
pluginInfo.setPluginAppMinVersion(jarManifest.getMainAttributes().getValue("Plugin-App-Min-Version"));
pluginInfo.setPluginRelease(Boolean.parseBoolean(jarManifest.getMainAttributes().getValue("Plugin-Release")));
if (jarManifest.getMainAttributes().getValue("Plugin-Conflicts-With") != null) {
pluginInfo.setConflictingPluginIds(Arrays.asList(jarManifest.getMainAttributes().getValue("Plugin-Conflicts-With")));
}
return pluginInfo;
}
}
private File installPlugin(File pluginJarFile, PluginInfo pluginInfo) throws IOException {
File globalUserPluginDir = UserConfig.getUserPluginLibDir();
globalUserPluginDir.mkdirs();
File targetPluginJarFile = new File(globalUserPluginDir, String.format("syncany-plugin-%s-%s.jar", pluginInfo.getPluginId(),
pluginInfo.getPluginVersion()));
logger.log(Level.INFO, "Installing plugin from " + pluginJarFile + " to " + targetPluginJarFile + " ...");
FileUtils.copyFile(pluginJarFile, targetPluginJarFile);
return targetPluginJarFile;
}
/**
* Downloads the plugin JAR from the given URL to a temporary
* local location.
*/
private File downloadPluginJar(String pluginJarUrl) throws Exception {
URL pluginJarFile = new URL(pluginJarUrl);
logger.log(Level.INFO, "Querying " + pluginJarFile + " ...");
URLConnection urlConnection = pluginJarFile.openConnection();
urlConnection.setConnectTimeout(2000);
urlConnection.setReadTimeout(2000);
File tempPluginFile = File.createTempFile("syncany-plugin", "tmp");
tempPluginFile.deleteOnExit();
logger.log(Level.INFO, "Downloading to " + tempPluginFile + " ...");
FileOutputStream tempPluginFileOutputStream = new FileOutputStream(tempPluginFile);
InputStream remoteJarFileInputStream = urlConnection.getInputStream();
IOUtils.copy(remoteJarFileInputStream, tempPluginFileOutputStream);
remoteJarFileInputStream.close();
tempPluginFileOutputStream.close();
if (!tempPluginFile.exists() || tempPluginFile.length() == 0) {
throw new Exception("Downloading plugin file failed, URL was " + pluginJarUrl);
}
return tempPluginFile;
}
private PluginOperationResult executeList() throws Exception {
Map<String, ExtendedPluginInfo> pluginInfos = new TreeMap<String, ExtendedPluginInfo>();
// First, list local plugins
if (options.getListMode() == PluginListMode.ALL || options.getListMode() == PluginListMode.LOCAL) {
for (PluginInfo localPluginInfo : getLocalList()) {
if (options.getPluginId() != null && !localPluginInfo.getPluginId().equals(options.getPluginId())) {
continue;
}
// Determine standard plugin information
ExtendedPluginInfo extendedPluginInfo = new ExtendedPluginInfo();
extendedPluginInfo.setLocalPluginInfo(localPluginInfo);
extendedPluginInfo.setInstalled(true);
// Test if plugin can be uninstalled
Plugin plugin = Plugins.get(localPluginInfo.getPluginId());
File pluginJarFile = getJarFile(plugin);
boolean canUninstall = canUninstall(pluginJarFile);
extendedPluginInfo.setCanUninstall(canUninstall);
// Add to list
pluginInfos.put(localPluginInfo.getPluginId(), extendedPluginInfo);
}
}
// Then, list remove plugins
if (options.getListMode() == PluginListMode.ALL || options.getListMode() == PluginListMode.REMOTE) {
for (PluginInfo remotePluginInfo : getRemotePluginInfoList()) {
if (options.getPluginId() != null && !remotePluginInfo.getPluginId().equals(options.getPluginId())) {
continue;
}
ExtendedPluginInfo extendedPluginInfo = pluginInfos.get(remotePluginInfo.getPluginId());
boolean localPluginInstalled = extendedPluginInfo != null;
if (!localPluginInstalled) { // Locally not installed
extendedPluginInfo = new ExtendedPluginInfo();
extendedPluginInfo.setInstalled(false);
extendedPluginInfo.setRemoteAvailable(true);
}
else { // Locally also installed
extendedPluginInfo.setRemoteAvailable(true);
}
extendedPluginInfo.setRemotePluginInfo(remotePluginInfo);
pluginInfos.put(remotePluginInfo.getPluginId(), extendedPluginInfo);
}
}
result.setPluginList(new ArrayList<ExtendedPluginInfo>(pluginInfos.values()));
result.setResultCode(PluginResultCode.OK);
return result;
}
private List<PluginInfo> getLocalList() {
List<PluginInfo> localPluginInfos = new ArrayList<PluginInfo>();
for (Plugin plugin : Plugins.list()) {
PluginInfo pluginInfo = new PluginInfo();
pluginInfo.setPluginId(plugin.getId());
pluginInfo.setPluginName(plugin.getName());
pluginInfo.setPluginVersion(plugin.getVersion());
localPluginInfos.add(pluginInfo);
}
return localPluginInfos;
}
private List<PluginInfo> getRemotePluginInfoList() throws Exception {
String remoteListStr = getRemoteListStr(null);
PluginListResponse pluginListResponse = new Persister().read(PluginListResponse.class, remoteListStr);
return pluginListResponse.getPlugins();
}
private PluginInfo getRemotePluginInfo(String pluginId) throws Exception {
String remoteListStr = getRemoteListStr(pluginId);
PluginListResponse pluginListResponse = new Persister().read(PluginListResponse.class, remoteListStr);
if (pluginListResponse.getPlugins().size() > 0) {
return pluginListResponse.getPlugins().get(0);
}
else {
return null;
}
}
private String getRemoteListStr(String pluginId) throws Exception {
String appVersion = Client.getApplicationVersion();
String snapshotsEnabled = (options.isSnapshots()) ? "true" : "false";
String pluginIdQueryStr = (pluginId != null) ? pluginId : "";
String osStr = EnvironmentUtil.getOperatingSystemDescription();
String archStr = EnvironmentUtil.getArchDescription();
URL pluginListUrl = new URL(String.format(PLUGIN_LIST_URL, appVersion, snapshotsEnabled, pluginIdQueryStr, osStr, archStr));
logger.log(Level.INFO, "Querying " + pluginListUrl + " ...");
eventBus.post(new PluginConnectToHostExternalEvent(pluginListUrl.getHost()));
URLConnection urlConnection = pluginListUrl.openConnection();
urlConnection.setConnectTimeout(2000);
urlConnection.setReadTimeout(2000);
BufferedReader urlStreamReader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder responseStringBuilder = new StringBuilder();
String line;
while ((line = urlStreamReader.readLine()) != null) {
responseStringBuilder.append(line);
}
String responseStr = responseStringBuilder.toString();
logger.log(Level.INFO, "Response from api.syncany.org: " + responseStr);
return responseStr;
}
}