org.ops4j.pax.web.deployer.internal.WarDeployer Maven / Gradle / Ivy

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package org.ops4j.pax.web.deployer.internal;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.jar.Attributes;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.jar.Manifest;

import org.apache.felix.fileinstall.ArtifactUrlTransformer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * An Apache Felix FileInstall transform for WAR files.
 * 
 * @author Alin Dreghiciu, Achim Nierbeck
 */
public class WarDeployer implements ArtifactUrlTransformer {

	/**
	 * Logger.
	 */
	private static final Logger LOG = LoggerFactory
			.getLogger(WarDeployer.class);

	/**
	 * Standard PATH separator
	 */
	private static final String PATH_SEPERATOR = "/";

	public boolean canHandle(final File artifact) {
		JarFile jar = null;
		try {
			if (artifact.isFile()) {
				// if it's a file it needs to end with war
				if (!artifact.getName().endsWith(".war")) {
					return false;
				}
			} else {
				// if it isn't a file it needs to end with .war.jar
				if (!artifact.getName().endsWith(".war.jar")) {
					return false;
				}
			}

			jar = new JarFile(artifact);
			JarEntry entry = jar.getJarEntry("WEB-INF/web.xml");
			// Only handle WAR artifacts
			if (entry == null) {
				if (LOG.isDebugEnabled()) {
					LOG.debug("No war file do not handle artifact:"
							+ artifact.getName());
				}
				return false;
			}
			// Only handle non OSGi bundles
			Manifest m = jar.getManifest();
			if (m != null
					&& m.getMainAttributes().getValue(
							new Attributes.Name("Bundle-SymbolicName")) != null
					&& m.getMainAttributes().getValue(
							new Attributes.Name("Bundle-Version")) != null) {
				if (LOG.isDebugEnabled()) {
					LOG.debug("This artifact has OSGi Manifest Header skipping: "
							+ artifact.getName());
				}
				return false;
			}
		//CHECKSTYLE:OFF	
		} catch (Exception e) {
			if (LOG.isTraceEnabled())
				LOG.trace("Can't handle file " + artifact.getName(), e);
			return false;
		} finally {
			if (jar != null) {
				try {
					jar.close();
				} catch (IOException ignore) {
					if (LOG.isDebugEnabled()) {
						LOG.debug("failed to close war file", ignore);
					}
				}
			}
		}
		//CHECKSTYLE:ON
		try {
			new URL("webbundle", null, artifact.toURI().toURL()
					.toExternalForm());
		} catch (MalformedURLException e) {
			LOG.warn(String
					.format("File %s could not be transformed. Most probably that Pax URL WAR handler is not installed",
							artifact.getAbsolutePath()));
			return false;
		}

		return true;
	}

	public URL transform(final URL artifact) throws Exception {
		if (LOG.isDebugEnabled()) {
			LOG.debug("Transforming artifact with URL: " + artifact);
		}
		final String path = artifact.getPath();
		final String protocol = artifact.getProtocol();
		if (path != null) {
			int idx = -1;
			// match the last slash to retrieve the name of the archive
			if ("jardir".equalsIgnoreCase(protocol)) {
				// just to make sure this works on all kinds of windows
				File fileInstance = new File(path);
				// with a jardir this is system specific
				idx = fileInstance.getAbsolutePath()
						.lastIndexOf(File.separator);
			} else {
				// a standard file is not system specific, this is always a
				// standardized URL path
				idx = path.lastIndexOf(PATH_SEPERATOR);
			}
			// match the suffix so we get rid of it for displaying
			if (idx > 0) {
				final String[] name = DeployerUtils.extractNameVersionType(path
						.substring(idx + 1));
				final StringBuilder url = new StringBuilder();
				url.append(artifact.toExternalForm());
				if (artifact.toExternalForm().contains("?")) {
					url.append("&");
				} else {
					url.append("?");
				}
				url.append("Web-ContextPath=").append(name[0]);
				url.append("&");
				url.append("Bundle-SymbolicName=").append(name[0]);
				url.append("&");
				url.append("Bundle-Version=").append(name[1]);

				LOG.debug("Transformed URL of {} to following {}", path, url);
				return new URL("webbundle", null, url.toString());
			}
		}
		if (LOG.isDebugEnabled()) {
			LOG.debug("No path for given artifact, retry with webbundle prepended");
		}
		return new URL("webbundle", null, artifact.toExternalForm());
	}

}