| /** |
| * 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.web.resources; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Type; |
| |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.ext.Provider; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.server.common.JspHelper; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.apache.hadoop.security.UserGroupInformation.AuthenticationMethod; |
| |
| import com.sun.jersey.api.core.HttpContext; |
| import com.sun.jersey.core.spi.component.ComponentContext; |
| import com.sun.jersey.core.spi.component.ComponentScope; |
| import com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable; |
| import com.sun.jersey.spi.inject.Injectable; |
| import com.sun.jersey.spi.inject.InjectableProvider; |
| |
| /** Inject user information to http operations. */ |
| @Provider |
| public class UserProvider |
| extends AbstractHttpContextInjectable<UserGroupInformation> |
| implements InjectableProvider<Context, Type> { |
| @Context HttpServletRequest request; |
| @Context ServletContext servletcontext; |
| |
| @Override |
| public UserGroupInformation getValue(final HttpContext context) { |
| final Configuration conf = (Configuration) servletcontext |
| .getAttribute(JspHelper.CURRENT_CONF); |
| try { |
| return JspHelper.getUGI(servletcontext, request, conf, |
| AuthenticationMethod.KERBEROS, false); |
| } catch (IOException e) { |
| throw new SecurityException( |
| "Failed to obtain user group information: " + e, e); |
| } |
| } |
| |
| @Override |
| public ComponentScope getScope() { |
| return ComponentScope.PerRequest; |
| } |
| |
| @Override |
| public Injectable<UserGroupInformation> getInjectable( |
| final ComponentContext componentContext, final Context context, |
| final Type type) { |
| return type.equals(UserGroupInformation.class)? this : null; |
| } |
| } |