/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.hdfs.server.datanode.web.resources;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.PrivilegedExceptionAction;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.Consumes;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.MD5MD5CRC32FileChecksum;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream;
import org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.web.JsonUtil;
import org.apache.hadoop.hdfs.web.ParamFilter;
import org.apache.hadoop.hdfs.web.WebHdfsFileSystem;
import org.apache.hadoop.hdfs.web.resources.BlockSizeParam;
import org.apache.hadoop.hdfs.web.resources.BufferSizeParam;
import org.apache.hadoop.hdfs.web.resources.DelegationParam;
import org.apache.hadoop.hdfs.web.resources.GetOpParam;
import org.apache.hadoop.hdfs.web.resources.HttpOpParam;
import org.apache.hadoop.hdfs.web.resources.LengthParam;
import org.apache.hadoop.hdfs.web.resources.OffsetParam;
import org.apache.hadoop.hdfs.web.resources.OverwriteParam;
import org.apache.hadoop.hdfs.web.resources.Param;
import org.apache.hadoop.hdfs.web.resources.PermissionParam;
import org.apache.hadoop.hdfs.web.resources.PostOpParam;
import org.apache.hadoop.hdfs.web.resources.PutOpParam;
import org.apache.hadoop.hdfs.web.resources.ReplicationParam;
import org.apache.hadoop.hdfs.web.resources.UriFsPathParam;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.token.Token;
import com.sun.jersey.spi.container.ResourceFilters;
/** Web-hdfs DataNode implementation. */
@Path("")
@ResourceFilters(ParamFilter.class)
public class DatanodeWebHdfsMethods {
public static final Log LOG = LogFactory.getLog(DatanodeWebHdfsMethods.class);
private static final UriFsPathParam ROOT = new UriFsPathParam("");
private @Context ServletContext context;
private @Context HttpServletResponse response;
private void init(final UserGroupInformation ugi, final DelegationParam delegation,
final UriFsPathParam path, final HttpOpParam<?> op,
final Param<?, ?>... parameters) throws IOException {
if (LOG.isTraceEnabled()) {
LOG.trace("HTTP " + op.getValue().getType() + ": " + op + ", " + path
+ ", ugi=" + ugi + Param.toSortedString(", ", parameters));
}
//clear content type
response.setContentType(null);
if (UserGroupInformation.isSecurityEnabled()) {
//add a token for RPC.
final DataNode datanode = (DataNode)context.getAttribute("datanode");
final InetSocketAddress nnRpcAddr = NameNode.getAddress(datanode.getConf());
final Token<DelegationTokenIdentifier> token = new Token<DelegationTokenIdentifier>();
token.decodeFromUrlString(delegation.getValue());
SecurityUtil.setTokenService(token, nnRpcAddr);
token.setKind(DelegationTokenIdentifier.HDFS_DELEGATION_KIND);
ugi.addToken(token);
}
}
/** Handle HTTP PUT request for the root. */
@PUT
@Path("/")
@Consumes({"*/*"})
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response putRoot(
final InputStream in,
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@QueryParam(PutOpParam.NAME) @DefaultValue(PutOpParam.DEFAULT)
final PutOpParam op,
@QueryParam(PermissionParam.NAME) @DefaultValue(PermissionParam.DEFAULT)
final PermissionParam permission,
@QueryParam(OverwriteParam.NAME) @DefaultValue(OverwriteParam.DEFAULT)
final OverwriteParam overwrite,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize,
@QueryParam(ReplicationParam.NAME) @DefaultValue(ReplicationParam.DEFAULT)
final ReplicationParam replication,
@QueryParam(BlockSizeParam.NAME) @DefaultValue(BlockSizeParam.DEFAULT)
final BlockSizeParam blockSize
) throws IOException, InterruptedException {
return put(in, ugi, delegation, ROOT, op, permission, overwrite, bufferSize,
replication, blockSize);
}
/** Handle HTTP PUT request. */
@PUT
@Path("{" + UriFsPathParam.NAME + ":.*}")
@Consumes({"*/*"})
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response put(
final InputStream in,
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@PathParam(UriFsPathParam.NAME) final UriFsPathParam path,
@QueryParam(PutOpParam.NAME) @DefaultValue(PutOpParam.DEFAULT)
final PutOpParam op,
@QueryParam(PermissionParam.NAME) @DefaultValue(PermissionParam.DEFAULT)
final PermissionParam permission,
@QueryParam(OverwriteParam.NAME) @DefaultValue(OverwriteParam.DEFAULT)
final OverwriteParam overwrite,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize,
@QueryParam(ReplicationParam.NAME) @DefaultValue(ReplicationParam.DEFAULT)
final ReplicationParam replication,
@QueryParam(BlockSizeParam.NAME) @DefaultValue(BlockSizeParam.DEFAULT)
final BlockSizeParam blockSize
) throws IOException, InterruptedException {
init(ugi, delegation, path, op, permission, overwrite, bufferSize,
replication, blockSize);
return ugi.doAs(new PrivilegedExceptionAction<Response>() {
@Override
public Response run() throws IOException, URISyntaxException {
final String fullpath = path.getAbsolutePath();
final DataNode datanode = (DataNode)context.getAttribute("datanode");
switch(op.getValue()) {
case CREATE:
{
final Configuration conf = new Configuration(datanode.getConf());
conf.set(FsPermission.UMASK_LABEL, "000");
final int b = bufferSize.getValue(conf);
DFSClient dfsclient = new DFSClient(conf);
FSDataOutputStream out = null;
try {
out = new FSDataOutputStream(dfsclient.create(
fullpath, permission.getFsPermission(), overwrite.getValue(),
replication.getValue(conf), blockSize.getValue(conf), null, b), null);
IOUtils.copyBytes(in, out, b);
out.close();
out = null;
dfsclient.close();
dfsclient = null;
} finally {
IOUtils.cleanup(LOG, out);
IOUtils.cleanup(LOG, dfsclient);
}
final String nnAddr = NameNode.getInfoServer(conf);
final URI uri = new URI(WebHdfsFileSystem.SCHEME + "://" + nnAddr + fullpath);
return Response.created(uri).type(MediaType.APPLICATION_OCTET_STREAM).build();
}
default:
throw new UnsupportedOperationException(op + " is not supported");
}
}
});
}
/** Handle HTTP POST request for the root for the root. */
@POST
@Path("/")
@Consumes({"*/*"})
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response postRoot(
final InputStream in,
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@QueryParam(PostOpParam.NAME) @DefaultValue(PostOpParam.DEFAULT)
final PostOpParam op,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize
) throws IOException, InterruptedException {
return post(in, ugi, delegation, ROOT, op, bufferSize);
}
/** Handle HTTP POST request. */
@POST
@Path("{" + UriFsPathParam.NAME + ":.*}")
@Consumes({"*/*"})
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response post(
final InputStream in,
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@PathParam(UriFsPathParam.NAME) final UriFsPathParam path,
@QueryParam(PostOpParam.NAME) @DefaultValue(PostOpParam.DEFAULT)
final PostOpParam op,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize
) throws IOException, InterruptedException {
init(ugi, delegation, path, op, bufferSize);
return ugi.doAs(new PrivilegedExceptionAction<Response>() {
@Override
public Response run() throws IOException {
final String fullpath = path.getAbsolutePath();
final DataNode datanode = (DataNode)context.getAttribute("datanode");
switch(op.getValue()) {
case APPEND:
{
final Configuration conf = new Configuration(datanode.getConf());
final int b = bufferSize.getValue(conf);
DFSClient dfsclient = new DFSClient(conf);
FSDataOutputStream out = null;
try {
out = dfsclient.append(fullpath, b, null, null);
IOUtils.copyBytes(in, out, b);
out.close();
out = null;
dfsclient.close();
dfsclient = null;
} finally {
IOUtils.cleanup(LOG, out);
IOUtils.cleanup(LOG, dfsclient);
}
return Response.ok().type(MediaType.APPLICATION_OCTET_STREAM).build();
}
default:
throw new UnsupportedOperationException(op + " is not supported");
}
}
});
}
/** Handle HTTP GET request for the root. */
@GET
@Path("/")
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response getRoot(
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@QueryParam(GetOpParam.NAME) @DefaultValue(GetOpParam.DEFAULT)
final GetOpParam op,
@QueryParam(OffsetParam.NAME) @DefaultValue(OffsetParam.DEFAULT)
final OffsetParam offset,
@QueryParam(LengthParam.NAME) @DefaultValue(LengthParam.DEFAULT)
final LengthParam length,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize
) throws IOException, InterruptedException {
return get(ugi, delegation, ROOT, op, offset, length, bufferSize);
}
/** Handle HTTP GET request. */
@GET
@Path("{" + UriFsPathParam.NAME + ":.*}")
@Produces({MediaType.APPLICATION_OCTET_STREAM, MediaType.APPLICATION_JSON})
public Response get(
@Context final UserGroupInformation ugi,
@QueryParam(DelegationParam.NAME) @DefaultValue(DelegationParam.DEFAULT)
final DelegationParam delegation,
@PathParam(UriFsPathParam.NAME) final UriFsPathParam path,
@QueryParam(GetOpParam.NAME) @DefaultValue(GetOpParam.DEFAULT)
final GetOpParam op,
@QueryParam(OffsetParam.NAME) @DefaultValue(OffsetParam.DEFAULT)
final OffsetParam offset,
@QueryParam(LengthParam.NAME) @DefaultValue(LengthParam.DEFAULT)
final LengthParam length,
@QueryParam(BufferSizeParam.NAME) @DefaultValue(BufferSizeParam.DEFAULT)
final BufferSizeParam bufferSize
) throws IOException, InterruptedException {
init(ugi, delegation, path, op, offset, length, bufferSize);
return ugi.doAs(new PrivilegedExceptionAction<Response>() {
@Override
public Response run() throws IOException {
final String fullpath = path.getAbsolutePath();
final DataNode datanode = (DataNode)context.getAttribute("datanode");
final Configuration conf = new Configuration(datanode.getConf());
final InetSocketAddress nnRpcAddr = NameNode.getAddress(conf);
switch(op.getValue()) {
case OPEN:
{
final int b = bufferSize.getValue(conf);
final DFSClient dfsclient = new DFSClient(nnRpcAddr, conf);
DFSDataInputStream in = null;
try {
in = new DFSClient.DFSDataInputStream(
dfsclient.open(fullpath, b, true, null));
in.seek(offset.getValue());
} catch(IOException ioe) {
IOUtils.cleanup(LOG, in);
IOUtils.cleanup(LOG, dfsclient);
throw ioe;
}
final long n = length.getValue() != null? length.getValue()
: in.getVisibleLength();
return Response.ok(new OpenEntity(in, n, dfsclient)).type(
MediaType.APPLICATION_OCTET_STREAM).build();
}
case GETFILECHECKSUM:
{
MD5MD5CRC32FileChecksum checksum = null;
DFSClient dfsclient = new DFSClient(nnRpcAddr, conf);
try {
checksum = dfsclient.getFileChecksum(fullpath);
dfsclient.close();
dfsclient = null;
} finally {
IOUtils.cleanup(LOG, dfsclient);
}
final String js = JsonUtil.toJsonString(checksum);
return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
}
default:
throw new UnsupportedOperationException(op + " is not supported");
}
}
});
}
}