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.http.commons.domain.RDFMediaType.TEXT_PLAIN_WITH_CHARSET; 023import static org.fcrepo.kernel.api.RdfLexicon.CONSTRAINED_BY; 024import static org.slf4j.LoggerFactory.getLogger; 025 026import javax.ws.rs.core.Link; 027import javax.ws.rs.core.Response; 028import javax.ws.rs.ext.ExceptionMapper; 029import javax.ws.rs.ext.Provider; 030 031import org.fcrepo.kernel.api.exception.MalformedRdfException; 032 033import org.apache.commons.codec.binary.Base64; 034import org.slf4j.Logger; 035 036/** 037 * @author cabeer 038 * @since 9/30/14 039 */ 040@Provider 041public class MalformedRdfExceptionMapper implements 042 ExceptionMapper<MalformedRdfException>, ExceptionDebugLogging { 043 044 private static final Logger LOGGER = 045 getLogger(MalformedRdfExceptionMapper.class); 046 047 private static final int REASONABLE_LENGTH = 500; 048 049 @Override 050 public Response toResponse(final MalformedRdfException e) { 051 debugException(this, e, LOGGER); 052 final Link link = Link.fromUri(getConstraintUri(e)).rel(CONSTRAINED_BY.getURI()).build(); 053 final String msg = e.getMessage(); 054 if (msg.matches(".*org.*Exception: .*")) { 055 return status(BAD_REQUEST).entity(msg.replaceAll("org.*Exception: ", "")).links(link).type( 056 TEXT_PLAIN_WITH_CHARSET).build(); 057 } 058 return status(BAD_REQUEST).entity(msg).links(link).type(TEXT_PLAIN_WITH_CHARSET).build(); 059 } 060 061 private static String getConstraintUri(final MalformedRdfException e) { 062 final int index = Math.min(e.getMessage().length(), REASONABLE_LENGTH); 063 if (index > e.getMessage().length()) { 064 LOGGER.debug("Truncating Link header to {} characters.", REASONABLE_LENGTH); 065 } 066 067 return "data:text/plain;base64," + Base64.encodeBase64String(e.getMessage().substring(0, index).getBytes()); 068 } 069}