001/* 002 * (C) Copyright 2006-2012 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 * 016 * Contributors: 017 * Nuxeo - initial API and implementation 018 * 019 */ 020 021package org.nuxeo.ecm.platform.web.common.exceptionhandling; 022 023import java.util.Arrays; 024import java.util.List; 025 026import javax.servlet.ServletException; 027 028import org.nuxeo.ecm.core.api.DocumentSecurityException; 029import org.nuxeo.ecm.core.io.download.DownloadHelper; 030 031public class ExceptionHelper { 032 033 private ExceptionHelper() { 034 } 035 036 public static Throwable unwrapException(Throwable t) { 037 Throwable cause = null; 038 if (t instanceof ServletException) { 039 cause = ((ServletException) t).getRootCause(); 040 } else if (t instanceof Exception) { 041 cause = t.getCause(); 042 } 043 044 if (cause == null) { 045 return t; 046 } else { 047 return unwrapException(cause); 048 } 049 } 050 051 protected static final List<String> ERROR_MESSAGES = Arrays.asList("java.lang.SecurityException", 052 DocumentSecurityException.class.getName(), SecurityException.class.getName()); 053 054 public static boolean isSecurityError(Throwable t) { 055 if (t == null) { 056 return false; 057 } else if (t instanceof DocumentSecurityException || t.getCause() instanceof DocumentSecurityException 058 || t.getCause() instanceof SecurityException) { 059 return true; 060 } else if (t.getMessage() != null) { 061 String message = t.getMessage(); 062 for (String errorMessage : ERROR_MESSAGES) { 063 if (message.contains(errorMessage)) { 064 return true; 065 } 066 } 067 } 068 return false; 069 } 070 071}