/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package co.cask.cdap.internal.app.runtime.webapp;
import co.cask.cdap.common.conf.Constants;
import co.cask.http.AbstractHttpHandler;
import co.cask.http.HandlerContext;
import co.cask.http.HttpResponder;
import com.google.common.base.Predicate;
import com.google.common.base.Throwables;
import com.google.common.collect.ImmutableMultimap;
import com.google.common.io.ByteStreams;
import com.google.inject.Inject;
import com.google.inject.assistedinject.Assisted;
import org.apache.twill.filesystem.Location;
import org.jboss.netty.handler.codec.http.HttpHeaders;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import javax.activation.MimetypesFileTypeMap;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
/**
* Http service handler that serves files in deployed jar without exploding the jar.
*/
public class IntactJarHttpHandler extends AbstractHttpHandler implements JarHttpHandler {
private static final Logger LOG = LoggerFactory.getLogger(IntactJarHttpHandler.class);
private static final MimetypesFileTypeMap mimeTypesMap = new MimetypesFileTypeMap();
private final Location jarLocation;
private JarFile jarFile;
private ServePathGenerator servePathGenerator;
@Inject
public IntactJarHttpHandler(@Assisted Location jarLocation) {
this.jarLocation = jarLocation;
}
@Override
public void init(HandlerContext context) {
super.init(context);
try {
jarFile = new JarFile(new File(jarLocation.toURI()));
Predicate<String> fileExists = new Predicate<String>() {
@Override
public boolean apply(String file) {
return file != null && jarFile.getJarEntry(file) != null;
}
};
servePathGenerator = new ServePathGenerator(Constants.Webapp.WEBAPP_DIR, fileExists);
} catch (IOException e) {
LOG.error("Got exception: ", e);
throw Throwables.propagate(e);
}
}
@Override
public void destroy(HandlerContext context) {
try {
jarFile.close();
} catch (IOException e) {
throw Throwables.propagate(e);
}
}
@Override
public String getServePath(String hostHeader, String uri) {
return servePathGenerator.getServePath(hostHeader, uri);
}
@GET
@Path("**")
public void serve(HttpRequest request, HttpResponder responder) {
try {
String path = request.getUri();
if (path == null) {
responder.sendStatus(HttpResponseStatus.NOT_FOUND);
return;
}
if (path.startsWith("/") && path.length() > 1) {
path = path.substring(1);
}
JarEntry jarEntry = jarFile.getJarEntry(path);
if (jarEntry == null) {
responder.sendStatus(HttpResponseStatus.NOT_FOUND);
return;
}
InputStream in = jarFile.getInputStream(jarEntry);
if (in == null) {
// path is directory
responder.sendStatus(HttpResponseStatus.FORBIDDEN);
return;
}
try {
responder.sendByteArray(HttpResponseStatus.OK, ByteStreams.toByteArray(in),
ImmutableMultimap.of(HttpHeaders.Names.CONTENT_TYPE,
mimeTypesMap.getContentType(path)));
} finally {
in.close();
}
} catch (Throwable t) {
LOG.error("Got exception: ", t);
responder.sendStatus(HttpResponseStatus.INTERNAL_SERVER_ERROR);
}
}
}