| /******************************************************************************* |
| * 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.olingo.odata2.core.rest; |
| |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map.Entry; |
| import java.util.Set; |
| |
| import javax.servlet.ServletConfig; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.Application; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.HttpHeaders; |
| import javax.ws.rs.core.MediaType; |
| import javax.ws.rs.core.MultivaluedMap; |
| import javax.ws.rs.core.Response; |
| import javax.ws.rs.core.UriInfo; |
| import javax.ws.rs.ext.ExceptionMapper; |
| import javax.ws.rs.ext.Provider; |
| |
| import org.apache.olingo.odata2.api.ODataServiceFactory; |
| import org.apache.olingo.odata2.api.commons.HttpStatusCodes; |
| import org.apache.olingo.odata2.api.ep.EntityProviderException; |
| import org.apache.olingo.odata2.api.exception.ODataApplicationException; |
| import org.apache.olingo.odata2.api.processor.ODataErrorCallback; |
| import org.apache.olingo.odata2.api.processor.ODataErrorContext; |
| import org.apache.olingo.odata2.api.processor.ODataResponse; |
| import org.apache.olingo.odata2.core.commons.ContentType; |
| import org.apache.olingo.odata2.core.ep.ProviderFacadeImpl; |
| |
| /** |
| * Creates an error response according to the format defined by the OData standard |
| * if an exception occurs that is not handled elsewhere. |
| * |
| */ |
| @Provider |
| public class ODataExceptionMapperImpl implements ExceptionMapper<Exception> { |
| |
| private static final String DOLLAR_FORMAT = "$format"; |
| private static final String DOLLAR_FORMAT_JSON = "json"; |
| |
| private static final Locale DEFAULT_RESPONSE_LOCALE = Locale.ENGLISH; |
| |
| @Context |
| UriInfo uriInfo; |
| @Context |
| HttpHeaders httpHeaders; |
| @Context |
| ServletConfig servletConfig; |
| @Context |
| HttpServletRequest servletRequest; |
| @Context |
| Application app; |
| |
| @Override |
| public Response toResponse(final Exception exception) { |
| ODataResponse response; |
| try { |
| if (exception instanceof WebApplicationException) { |
| response = handleWebApplicationException(exception); |
| } else { |
| response = handleException(exception); |
| } |
| } catch (Exception e) { |
| response = ODataResponse.entity("Exception during error handling occured!") |
| .contentHeader(ContentType.TEXT_PLAIN.toContentTypeString()) |
| .status(HttpStatusCodes.INTERNAL_SERVER_ERROR).build(); |
| } |
| // Convert OData response to JAX-RS response. |
| return RestUtil.convertResponse(response); |
| } |
| |
| private ODataResponse handleException(final Exception exception) { |
| |
| ODataExceptionWrapper exceptionWrapper = |
| new ODataExceptionWrapper(uriInfo, httpHeaders, getErrorHandlerCallback()); |
| return exceptionWrapper.wrapInExceptionResponse(exception); |
| } |
| |
| private ODataResponse handleWebApplicationException(final Exception exception) throws ClassNotFoundException, |
| InstantiationException, IllegalAccessException, EntityProviderException { |
| ODataErrorContext errorContext = createErrorContext((WebApplicationException) exception); |
| ODataErrorCallback callback = getErrorHandlerCallback(); |
| return callback == null ? |
| new ProviderFacadeImpl().writeErrorDocument(errorContext) : executeErrorCallback(errorContext, callback); |
| } |
| |
| private ODataResponse executeErrorCallback(final ODataErrorContext errorContext, final ODataErrorCallback callback) { |
| ODataResponse oDataResponse; |
| try { |
| oDataResponse = callback.handleError(errorContext); |
| } catch (ODataApplicationException e) { |
| oDataResponse = handleException(e); |
| } |
| return oDataResponse; |
| } |
| |
| private ODataErrorContext createErrorContext(final WebApplicationException exception) { |
| ODataErrorContext context = new ODataErrorContext(); |
| if (uriInfo != null) { |
| context.setRequestUri(uriInfo.getRequestUri()); |
| } |
| if (httpHeaders != null && httpHeaders.getRequestHeaders() != null) { |
| MultivaluedMap<String, String> requestHeaders = httpHeaders.getRequestHeaders(); |
| Set<Entry<String, List<String>>> entries = requestHeaders.entrySet(); |
| for (Entry<String, List<String>> entry : entries) { |
| context.putRequestHeader(entry.getKey(), entry.getValue()); |
| } |
| } |
| context.setContentType(getContentType().toContentTypeString()); |
| context.setException(exception); |
| context.setErrorCode(null); |
| context.setMessage(exception.getMessage()); |
| context.setLocale(DEFAULT_RESPONSE_LOCALE); |
| HttpStatusCodes statusCode = HttpStatusCodes.fromStatusCode(exception.getResponse().getStatus()); |
| context.setHttpStatus(statusCode); |
| if (statusCode == HttpStatusCodes.METHOD_NOT_ALLOWED) { |
| // RFC 2616, 5.1.1: " An origin server SHOULD return the status code |
| // 405 (Method Not Allowed) if the method is known by the origin server |
| // but not allowed for the requested resource, and 501 (Not Implemented) |
| // if the method is unrecognized or not implemented by the origin server." |
| // Since all recognized methods are handled elsewhere, we unconditionally |
| // switch to 501 here for not-allowed exceptions thrown directly from |
| // JAX-RS implementations. |
| context.setHttpStatus(HttpStatusCodes.NOT_IMPLEMENTED); |
| context.setMessage("The request dispatcher does not allow the HTTP method used for the request."); |
| context.setLocale(Locale.ENGLISH); |
| } |
| return context; |
| } |
| |
| private ContentType getContentType() { |
| ContentType contentType = getContentTypeByUriInfo(); |
| if (contentType == null) { |
| contentType = getContentTypeByAcceptHeader(); |
| } |
| return contentType; |
| } |
| |
| private ContentType getContentTypeByUriInfo() { |
| ContentType contentType = null; |
| if (uriInfo != null && uriInfo.getQueryParameters() != null) { |
| MultivaluedMap<String, String> queryParameters = uriInfo.getQueryParameters(); |
| if (queryParameters.containsKey(DOLLAR_FORMAT)) { |
| String contentTypeString = queryParameters.getFirst(DOLLAR_FORMAT); |
| if (DOLLAR_FORMAT_JSON.equals(contentTypeString)) { |
| contentType = ContentType.APPLICATION_JSON; |
| } else { |
| // Any format mentioned in the $format parameter other than json results in an application/xml content type |
| // for error messages due to the OData V2 Specification. |
| contentType = ContentType.APPLICATION_XML; |
| } |
| } |
| } |
| return contentType; |
| } |
| |
| private ContentType getContentTypeByAcceptHeader() { |
| for (MediaType type : httpHeaders.getAcceptableMediaTypes()) { |
| if (ContentType.isParseable(type.toString())) { |
| ContentType convertedContentType = ContentType.create(type.toString()); |
| if (convertedContentType.isWildcard() |
| || ContentType.APPLICATION_XML.equals(convertedContentType) |
| || ContentType.APPLICATION_XML_CS_UTF_8.equals(convertedContentType) |
| || ContentType.APPLICATION_ATOM_XML.equals(convertedContentType) |
| || ContentType.APPLICATION_ATOM_XML_CS_UTF_8.equals(convertedContentType)) { |
| return ContentType.APPLICATION_XML; |
| } else if (ContentType.APPLICATION_JSON.equals(convertedContentType) |
| || ContentType.APPLICATION_JSON_CS_UTF_8.equals(convertedContentType)) { |
| return ContentType.APPLICATION_JSON; |
| } |
| } |
| } |
| return ContentType.APPLICATION_XML; |
| } |
| |
| private ODataErrorCallback getErrorHandlerCallback() { |
| final ODataServiceFactory serviceFactory = |
| ODataRootLocator.createServiceFactoryFromContext(app, servletRequest, servletConfig); |
| return serviceFactory.getCallback(ODataErrorCallback.class); |
| } |
| } |