001/* 002 * Licensed to DuraSpace under one or more contributor license agreements. 003 * See the NOTICE file distributed with this work for additional information 004 * regarding copyright ownership. 005 * 006 * DuraSpace licenses this file to you under the Apache License, 007 * Version 2.0 (the "License"); you may not use this file except in 008 * compliance 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 */ 018package org.fcrepo.http.commons.exceptionhandlers; 019 020import static javax.ws.rs.core.Response.status; 021import static javax.ws.rs.core.Response.Status.BAD_REQUEST; 022import static org.fcrepo.kernel.api.RdfLexicon.CONSTRAINED_BY; 023import static org.slf4j.LoggerFactory.getLogger; 024 025import javax.ws.rs.core.Link; 026import javax.ws.rs.core.Response; 027import javax.ws.rs.ext.ExceptionMapper; 028import javax.ws.rs.ext.Provider; 029 030import org.fcrepo.kernel.api.exception.MalformedRdfException; 031 032import org.apache.commons.codec.binary.Base64; 033import org.slf4j.Logger; 034 035/** 036 * @author cabeer 037 * @since 9/30/14 038 */ 039@Provider 040public class MalformedRdfExceptionMapper implements 041 ExceptionMapper<MalformedRdfException>, ExceptionDebugLogging { 042 043 private static final Logger LOGGER = 044 getLogger(MalformedRdfExceptionMapper.class); 045 046 private static final int REASONABLE_LENGTH = 500; 047 048 @Override 049 public Response toResponse(final MalformedRdfException e) { 050 debugException(this, e, LOGGER); 051 final Link link = Link.fromUri(getConstraintUri(e)).rel(CONSTRAINED_BY.getURI()).build(); 052 final String msg = e.getMessage(); 053 if (msg.matches(".*org.*Exception: .*")) { 054 return status(BAD_REQUEST).entity(msg.replaceAll("org.*Exception: ", "")).links(link).build(); 055 } 056 return status(BAD_REQUEST).entity(msg).links(link).build(); 057 } 058 059 private static String getConstraintUri(final MalformedRdfException e) { 060 final int index = Math.min(e.getMessage().length(), REASONABLE_LENGTH); 061 if (index > e.getMessage().length()) { 062 LOGGER.debug("Truncating Link header to {} characters.", REASONABLE_LENGTH); 063 } 064 065 return "data:text/plain;base64," + Base64.encodeBase64String(e.getMessage().substring(0, index).getBytes()); 066 } 067}