| /** |
| * 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.FileNotFoundException; |
| import java.io.IOException; |
| |
| import javax.servlet.http.HttpServletResponse; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.Response; |
| import javax.ws.rs.ext.ExceptionMapper; |
| import javax.ws.rs.ext.Provider; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hdfs.web.JsonUtil; |
| import org.apache.hadoop.ipc.RemoteException; |
| import org.apache.hadoop.security.authorize.AuthorizationException; |
| |
| import com.sun.jersey.api.ParamException; |
| import com.sun.jersey.api.container.ContainerException; |
| |
| /** Handle exceptions. */ |
| @Provider |
| public class ExceptionHandler implements ExceptionMapper<Exception> { |
| public static final Log LOG = LogFactory.getLog(ExceptionHandler.class); |
| |
| private static Exception toCause(Exception e) { |
| final Throwable t = e.getCause(); |
| if (t != null && t instanceof Exception) { |
| e = (Exception)e.getCause(); |
| } |
| return e; |
| } |
| |
| private @Context HttpServletResponse response; |
| |
| @Override |
| public Response toResponse(Exception e) { |
| if (LOG.isTraceEnabled()) { |
| LOG.trace("GOT EXCEPITION", e); |
| } |
| |
| //clear content type |
| response.setContentType(null); |
| |
| //Convert exception |
| if (e instanceof ParamException) { |
| final ParamException paramexception = (ParamException)e; |
| e = new IllegalArgumentException("Invalid value for webhdfs parameter \"" |
| + paramexception.getParameterName() + "\": " |
| + e.getCause().getMessage(), e); |
| } |
| if (e instanceof ContainerException) { |
| e = toCause(e); |
| } |
| if (e instanceof RemoteException) { |
| e = ((RemoteException)e).unwrapRemoteException(); |
| } |
| |
| //Map response status |
| final Response.Status s; |
| if (e instanceof SecurityException) { |
| s = Response.Status.UNAUTHORIZED; |
| } else if (e instanceof AuthorizationException) { |
| s = Response.Status.UNAUTHORIZED; |
| } else if (e instanceof FileNotFoundException) { |
| s = Response.Status.NOT_FOUND; |
| } else if (e instanceof IOException) { |
| s = Response.Status.FORBIDDEN; |
| } else if (e instanceof UnsupportedOperationException) { |
| s = Response.Status.BAD_REQUEST; |
| } else if (e instanceof IllegalArgumentException) { |
| s = Response.Status.BAD_REQUEST; |
| } else { |
| LOG.warn("INTERNAL_SERVER_ERROR", e); |
| s = Response.Status.INTERNAL_SERVER_ERROR; |
| } |
| |
| final String js = JsonUtil.toJsonString(e); |
| return Response.status(s).type(MediaType.APPLICATION_JSON).entity(js).build(); |
| } |
| } |