001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.fs.http.server;
020
021import com.sun.jersey.api.container.ContainerException;
022import org.apache.hadoop.classification.InterfaceAudience;
023import org.apache.hadoop.lib.service.FileSystemAccessException;
024import org.apache.hadoop.lib.wsrs.ExceptionProvider;
025import org.slf4j.Logger;
026import org.slf4j.LoggerFactory;
027import org.slf4j.MDC;
028
029import javax.ws.rs.core.Response;
030import javax.ws.rs.ext.Provider;
031import java.io.FileNotFoundException;
032import java.io.IOException;
033
034/**
035 * JAX-RS <code>ExceptionMapper</code> implementation that maps HttpFSServer's
036 * exceptions to HTTP status codes.
037 */
038@Provider
039@InterfaceAudience.Private
040public class HttpFSExceptionProvider extends ExceptionProvider {
041  private static Logger AUDIT_LOG = LoggerFactory.getLogger("httpfsaudit");
042  private static Logger LOG = LoggerFactory.getLogger(HttpFSExceptionProvider.class);
043
044  /**
045   * Maps different exceptions thrown by HttpFSServer to HTTP status codes.
046   * <p/>
047   * <ul>
048   * <li>SecurityException : HTTP UNAUTHORIZED</li>
049   * <li>FileNotFoundException : HTTP NOT_FOUND</li>
050   * <li>IOException : INTERNAL_HTTP SERVER_ERROR</li>
051   * <li>UnsupporteOperationException : HTTP BAD_REQUEST</li>
052   * <li>all other exceptions : HTTP INTERNAL_SERVER_ERROR </li>
053   * </ul>
054   *
055   * @param throwable exception thrown.
056   *
057   * @return mapped HTTP status code
058   */
059  @Override
060  public Response toResponse(Throwable throwable) {
061    Response.Status status;
062    if (throwable instanceof FileSystemAccessException) {
063      throwable = throwable.getCause();
064    }
065    if (throwable instanceof ContainerException) {
066      throwable = throwable.getCause();
067    }
068    if (throwable instanceof SecurityException) {
069      status = Response.Status.UNAUTHORIZED;
070    } else if (throwable instanceof FileNotFoundException) {
071      status = Response.Status.NOT_FOUND;
072    } else if (throwable instanceof IOException) {
073      status = Response.Status.INTERNAL_SERVER_ERROR;
074    } else if (throwable instanceof UnsupportedOperationException) {
075      status = Response.Status.BAD_REQUEST;
076    } else if (throwable instanceof IllegalArgumentException) {
077      status = Response.Status.BAD_REQUEST;
078    } else {
079      status = Response.Status.INTERNAL_SERVER_ERROR;
080    }
081    return createResponse(status, throwable);
082  }
083
084  /**
085   * Logs the HTTP status code and exception in HttpFSServer's log.
086   *
087   * @param status HTTP status code.
088   * @param throwable exception thrown.
089   */
090  @Override
091  protected void log(Response.Status status, Throwable throwable) {
092    String method = MDC.get("method");
093    String path = MDC.get("path");
094    String message = getOneLineMessage(throwable);
095    AUDIT_LOG.warn("FAILED [{}:{}] response [{}] {}", new Object[]{method, path, status, message});
096    LOG.warn("[{}:{}] response [{}] {}", new Object[]{method, path, status, message}, throwable);
097  }
098
099}