From a502d96a860456ec5e8c96761db70f7cabb74751 Mon Sep 17 00:00:00 2001
From: Paul Martin <paul@paulsputer.com>
Date: Sat, 30 Apr 2016 04:19:14 -0400
Subject: [PATCH] Merge pull request #1073 from gitblit/1062-DocEditorUpdates

---
 src/main/java/com/gitblit/manager/PluginManager.java |  185 +++++++++++++++++++++++++++++++++++++++------
 1 files changed, 158 insertions(+), 27 deletions(-)

diff --git a/src/main/java/com/gitblit/manager/PluginManager.java b/src/main/java/com/gitblit/manager/PluginManager.java
index 1c26fa1..b3936e5 100644
--- a/src/main/java/com/gitblit/manager/PluginManager.java
+++ b/src/main/java/com/gitblit/manager/PluginManager.java
@@ -15,13 +15,15 @@
  */
 package com.gitblit.manager;
 
-import java.io.BufferedInputStream;
 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.net.HttpURLConnection;
+import java.net.InetSocketAddress;
 import java.net.Proxy;
 import java.net.URL;
 import java.net.URLConnection;
@@ -37,15 +39,21 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import ro.fortsoft.pf4j.DefaultPluginFactory;
 import ro.fortsoft.pf4j.DefaultPluginManager;
+import ro.fortsoft.pf4j.ExtensionFactory;
+import ro.fortsoft.pf4j.Plugin;
 import ro.fortsoft.pf4j.PluginClassLoader;
+import ro.fortsoft.pf4j.PluginFactory;
 import ro.fortsoft.pf4j.PluginState;
 import ro.fortsoft.pf4j.PluginStateEvent;
 import ro.fortsoft.pf4j.PluginStateListener;
-import ro.fortsoft.pf4j.PluginVersion;
 import ro.fortsoft.pf4j.PluginWrapper;
+import ro.fortsoft.pf4j.Version;
 
+import com.gitblit.Constants;
 import com.gitblit.Keys;
+import com.gitblit.extensions.GitblitPlugin;
 import com.gitblit.models.PluginRegistry;
 import com.gitblit.models.PluginRegistry.InstallState;
 import com.gitblit.models.PluginRegistry.PluginRegistration;
@@ -54,8 +62,9 @@
 import com.gitblit.utils.FileUtils;
 import com.gitblit.utils.JsonUtils;
 import com.gitblit.utils.StringUtils;
-import com.google.common.io.Files;
-import com.google.common.io.InputSupplier;
+import com.google.common.io.ByteStreams;
+import com.google.inject.Inject;
+import com.google.inject.Singleton;
 
 /**
  * The plugin manager maintains the lifecycle of plugins. It is exposed as
@@ -63,26 +72,31 @@
  * the Dagger DI and retrieve extensions provided by active plugins.
  *
  * @author David Ostrovsky
+ * @author James Moger
  *
  */
+@Singleton
 public class PluginManager implements IPluginManager, PluginStateListener {
 
 	private final Logger logger = LoggerFactory.getLogger(getClass());
 
-	private final DefaultPluginManager pf4j;
-
 	private final IRuntimeManager runtimeManager;
+
+	private DefaultPluginManager pf4j;
 
 	// timeout defaults of Maven 3.0.4 in seconds
 	private int connectTimeout = 20;
 
 	private int readTimeout = 12800;
 
+	@Inject
 	public PluginManager(IRuntimeManager runtimeManager) {
-		File dir = runtimeManager.getFileOrFolder(Keys.plugins.folder, "${baseFolder}/plugins");
-		dir.mkdirs();
 		this.runtimeManager = runtimeManager;
-		this.pf4j = new DefaultPluginManager(dir);
+	}
+
+	@Override
+	public Version getSystemVersion() {
+		return pf4j.getSystemVersion();
 	}
 
 	@Override
@@ -92,6 +106,28 @@
 
 	@Override
 	public PluginManager start() {
+		File dir = runtimeManager.getFileOrFolder(Keys.plugins.folder, "${baseFolder}/plugins");
+		dir.mkdirs();
+
+		pf4j = new DefaultPluginManager(dir) {
+
+			@Override
+			protected PluginFactory createPluginFactory() {
+				return new GuicePluginFactory();
+			}
+
+			@Override
+			protected ExtensionFactory createExtensionFactory() {
+				return new GuiceExtensionFactory();
+			}
+		};
+
+		try {
+			Version systemVersion = Version.createVersion(Constants.getVersion());
+			pf4j.setSystemVersion(systemVersion);
+		} catch (Exception e) {
+			logger.error(null, e);
+		}
 		pf4j.loadPlugins();
 		logger.debug("Starting plugins");
 		pf4j.startPlugins();
@@ -126,8 +162,45 @@
 			return false;
 		}
 
+		// allow the plugin to prepare for operation after installation
+		PluginWrapper pluginWrapper = pf4j.getPlugin(pluginId);
+		if (pluginWrapper.getPlugin() instanceof GitblitPlugin) {
+			((GitblitPlugin) pluginWrapper.getPlugin()).onInstall();
+		}
+
 		PluginState state = pf4j.startPlugin(pluginId);
 		return PluginState.STARTED.equals(state);
+	}
+
+	@Override
+	public synchronized boolean upgradePlugin(String pluginId, String url, boolean verifyChecksum) throws IOException {
+		// ensure we can download the update BEFORE we remove the existing one
+		File file = download(url, verifyChecksum);
+		if (file == null || !file.exists()) {
+			logger.error("Failed to download plugin {}", url);
+			return false;
+		}
+
+		Version oldVersion = pf4j.getPlugin(pluginId).getDescriptor().getVersion();
+		if (removePlugin(pluginId, false)) {
+			String newPluginId = pf4j.loadPlugin(file);
+			if (StringUtils.isEmpty(newPluginId)) {
+				logger.error("Failed to load plugin {}", file);
+				return false;
+			}
+
+			// the plugin to handle an upgrade
+			PluginWrapper pluginWrapper = pf4j.getPlugin(newPluginId);
+			if (pluginWrapper.getPlugin() instanceof GitblitPlugin) {
+				((GitblitPlugin) pluginWrapper.getPlugin()).onUpgrade(oldVersion);
+			}
+
+			PluginState state = pf4j.startPlugin(newPluginId);
+			return PluginState.STARTED.equals(state);
+		} else {
+			logger.error("Failed to delete plugin {}", pluginId);
+		}
+		return false;
 	}
 
 	@Override
@@ -144,9 +217,21 @@
 	}
 
 	@Override
-	public synchronized boolean deletePlugin(String pluginId) {
+	public synchronized boolean uninstallPlugin(String pluginId) {
+		return removePlugin(pluginId, true);
+	}
+
+	protected boolean removePlugin(String pluginId, boolean isUninstall) {
 		PluginWrapper pluginWrapper = getPlugin(pluginId);
 		final String name = pluginWrapper.getPluginPath().substring(1);
+
+		if (isUninstall) {
+			// allow the plugin to prepare for uninstallation
+			if (pluginWrapper.getPlugin() instanceof GitblitPlugin) {
+				((GitblitPlugin) pluginWrapper.getPlugin()).onUninstall();
+			}
+		}
+
 		if (pf4j.deletePlugin(pluginId)) {
 
 			// delete the checksums
@@ -162,7 +247,6 @@
 							(file.getName().toLowerCase().endsWith(".sha1")
 									|| file.getName().toLowerCase().endsWith(".md5"));
 				}
-
 			});
 
 			if (checksums != null) {
@@ -296,9 +380,10 @@
 				map.put(reg.id, reg);
 			}
 		}
+
 		for (PluginWrapper pw : pf4j.getPlugins()) {
 			String id = pw.getDescriptor().getPluginId();
-			PluginVersion pv = pw.getDescriptor().getVersion();
+			Version pv = pw.getDescriptor().getVersion();
 			PluginRegistration reg = map.get(id);
 			if (reg != null) {
 				reg.installedRelease = pv.toString();
@@ -312,7 +397,7 @@
 		List<PluginRegistration> list = getRegisteredPlugins();
 		Iterator<PluginRegistration> itr = list.iterator();
 		while (itr.hasNext()) {
-			if (state != itr.next().getInstallState()) {
+			if (state != itr.next().getInstallState(getSystemVersion())) {
 				itr.remove();
 			}
 		}
@@ -320,9 +405,9 @@
 	}
 
 	@Override
-	public synchronized PluginRegistration lookupPlugin(String idOrName) {
+	public synchronized PluginRegistration lookupPlugin(String pluginId) {
 		for (PluginRegistration reg : getRegisteredPlugins()) {
-			if (reg.id.equalsIgnoreCase(idOrName) || reg.name.equalsIgnoreCase(idOrName)) {
+			if (reg.id.equalsIgnoreCase(pluginId)) {
 				return reg;
 			}
 		}
@@ -330,15 +415,15 @@
 	}
 
 	@Override
-	public synchronized PluginRelease lookupRelease(String idOrName, String version) {
-		PluginRegistration reg = lookupPlugin(idOrName);
+	public synchronized PluginRelease lookupRelease(String pluginId, String version) {
+		PluginRegistration reg = lookupPlugin(pluginId);
 		if (reg == null) {
 			return null;
 		}
 
 		PluginRelease pv;
 		if (StringUtils.isEmpty(version)) {
-			pv = reg.getCurrentRelease();
+			pv = reg.getCurrentRelease(getSystemVersion());
 		} else {
 			pv = reg.getRelease(version);
 		}
@@ -356,6 +441,10 @@
 	protected File download(String url, boolean verifyChecksum) throws IOException {
 		File file = downloadFile(url);
 
+		if (!verifyChecksum) {
+			return file;
+		}
+
 		File sha1File = null;
 		try {
 			sha1File = downloadFile(url + ".sha1");
@@ -369,7 +458,7 @@
 
 		}
 
-		if (sha1File == null && md5File == null && verifyChecksum) {
+		if (sha1File == null && md5File == null) {
 			throw new IOException("Missing SHA1 and MD5 checksums for " + url);
 		}
 
@@ -444,12 +533,9 @@
 		// try to get the server-specified last-modified date of this artifact
 		long lastModified = conn.getHeaderFieldDate("Last-Modified", System.currentTimeMillis());
 
-		Files.copy(new InputSupplier<InputStream>() {
-			@Override
-			public InputStream getInput() throws IOException {
-				return new BufferedInputStream(conn.getInputStream());
-			}
-		}, tmpFile);
+		try (InputStream is = conn.getInputStream(); OutputStream os = new FileOutputStream(tmpFile);) {
+			ByteStreams.copy(is, os);
+		}
 
 		File destFile = new File(pFolder, StringUtils.getLastPathElement(u.getPath()));
 		if (destFile.exists()) {
@@ -498,10 +584,55 @@
 	}
 
 	protected Proxy getProxy(URL url) {
-		return java.net.Proxy.NO_PROXY;
+		String proxyHost = runtimeManager.getSettings().getString(Keys.plugins.httpProxyHost, "");
+		String proxyPort = runtimeManager.getSettings().getString(Keys.plugins.httpProxyPort, "");
+
+		if (!StringUtils.isEmpty(proxyHost)  && !StringUtils.isEmpty(proxyPort)) {
+			return new Proxy(Proxy.Type.HTTP, new InetSocketAddress(proxyHost, Integer.parseInt(proxyPort)));
+		} else {
+			return java.net.Proxy.NO_PROXY;
+		}
 	}
 
 	protected String getProxyAuthorization(URL url) {
-		return "";
+		String proxyAuth = runtimeManager.getSettings().getString(Keys.plugins.httpProxyAuthorization, "");
+		return proxyAuth;
+	}
+
+	/**
+	 * Instantiates a plugin using pf4j but injects member fields
+	 * with Guice.
+	 */
+	private class GuicePluginFactory extends DefaultPluginFactory {
+
+		@Override
+		public Plugin create(PluginWrapper pluginWrapper) {
+			// use pf4j to create the plugin
+			Plugin plugin = super.create(pluginWrapper);
+
+			if (plugin != null) {
+				// allow Guice to inject member fields
+				runtimeManager.getInjector().injectMembers(plugin);
+			}
+
+			return plugin;
+		}
+	}
+
+	/**
+	 * Instantiates an extension using Guice.
+	 */
+	private class GuiceExtensionFactory implements ExtensionFactory {
+		@Override
+		public Object create(Class<?> extensionClass) {
+			// instantiate && inject the extension
+			logger.debug("Create instance for extension '{}'", extensionClass.getName());
+			try {
+				return runtimeManager.getInjector().getInstance(extensionClass);
+			} catch (Exception e) {
+				logger.error(e.getMessage(), e);
+			}
+			return null;
+		}
 	}
 }

--
Gitblit v1.9.1