| /* |
| * 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.myfaces.renderkit; |
| |
| import javax.faces.context.FacesContext; |
| |
| import org.apache.myfaces.util.lang.StringUtils; |
| |
| public class ContentTypeUtils |
| { |
| public static final String HTML_CONTENT_TYPE = "text/html"; |
| public static final String TEXT_ANY_CONTENT_TYPE = "text/*"; |
| public static final String ANY_CONTENT_TYPE = "*/*"; |
| |
| public static final String[] HTML_ALLOWED_CONTENT_TYPES = {HTML_CONTENT_TYPE, |
| ANY_CONTENT_TYPE, TEXT_ANY_CONTENT_TYPE}; |
| |
| public static final String XHTML_CONTENT_TYPE = "application/xhtml+xml"; |
| public static final String APPLICATION_XML_CONTENT_TYPE = "application/xml"; |
| public static final String TEXT_XML_CONTENT_TYPE = "text/xml"; |
| |
| public static final String[] XHTML_ALLOWED_CONTENT_TYPES = {XHTML_CONTENT_TYPE, |
| APPLICATION_XML_CONTENT_TYPE, TEXT_XML_CONTENT_TYPE}; |
| |
| public static final String[] AJAX_XHTML_ALLOWED_CONTENT_TYPES = {XHTML_CONTENT_TYPE}; |
| |
| public static final String DEFAULT_CHAR_ENCODING = "ISO-8859-1"; |
| |
| // The order is important in this case. |
| private static final String[] SUPPORTED_CONTENT_TYPES = { |
| HTML_CONTENT_TYPE, //Prefer this over any other, because IE does not support XHTML content type |
| XHTML_CONTENT_TYPE, APPLICATION_XML_CONTENT_TYPE, |
| TEXT_XML_CONTENT_TYPE, TEXT_ANY_CONTENT_TYPE, ANY_CONTENT_TYPE }; |
| |
| /** |
| * Indicate if the passes content type match one of the options passed. |
| */ |
| public static boolean containsContentType(String contentType, String[] allowedContentTypes) |
| { |
| if (allowedContentTypes == null) |
| { |
| return false; |
| } |
| for (int i = 0; i < allowedContentTypes.length; i++) |
| { |
| if (allowedContentTypes[i].contains(contentType)) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| public static String chooseWriterContentType(String contentTypeListString, |
| String[] htmlContentTypes, String[] xhtmlContentTypes) |
| { |
| String[] contentTypeList = splitContentTypeListString(contentTypeListString); |
| String[] supportedContentTypeArray = getSupportedContentTypes(); |
| String selectedContentType = null; |
| for (int i = 0; i < supportedContentTypeArray.length; i++) |
| { |
| String supportedContentType = supportedContentTypeArray[i].trim(); |
| |
| for (int j = 0; j < contentTypeList.length; j++) |
| { |
| String contentType = (String) contentTypeList[j]; |
| if (contentType.contains(supportedContentType)) |
| { |
| if (containsContentType(contentType, htmlContentTypes)) |
| { |
| selectedContentType = HTML_CONTENT_TYPE; |
| } |
| else if (containsContentType(contentType, xhtmlContentTypes)) |
| { |
| selectedContentType = XHTML_CONTENT_TYPE; |
| } |
| break; |
| } |
| } |
| if (selectedContentType != null) |
| { |
| break; |
| } |
| } |
| return selectedContentType; |
| } |
| |
| public static String[] splitContentTypeListString(String contentTypeListString) |
| { |
| String[] splittedArray = StringUtils.splitShortString(contentTypeListString, ','); |
| for (int i = 0; i < splittedArray.length; i++) |
| { |
| int semicolonIndex = splittedArray[i].indexOf(';'); |
| if (semicolonIndex != -1) |
| { |
| splittedArray[i] = splittedArray[i].substring(0,semicolonIndex); |
| } |
| } |
| return splittedArray; |
| } |
| |
| public static String getContentTypeFromAcceptHeader(FacesContext context) |
| { |
| String contentTypeListString = (String) context.getExternalContext() |
| .getRequestHeaderMap().get("Accept"); |
| // There is a windows mobile IE client (6.12) sending |
| // "application/vnd.wap.mms-message;*/*" |
| // Note that the Accept header should be written as |
| // "application/vnd.wap.mms-message,*/*" , |
| // so this is bug of the client. Anyway, this is a workaround ... |
| if (contentTypeListString != null |
| && contentTypeListString.startsWith("application/vnd.wap.mms-message;*/*")) |
| { |
| contentTypeListString = "*/*"; |
| } |
| return contentTypeListString; |
| } |
| |
| public static String[] getSupportedContentTypes() |
| { |
| return SUPPORTED_CONTENT_TYPES; |
| } |
| |
| public static boolean isXHTMLContentType(String contentType) |
| { |
| return contentType.contains(XHTML_CONTENT_TYPE) |
| || contentType.contains(APPLICATION_XML_CONTENT_TYPE) |
| || contentType.contains(TEXT_XML_CONTENT_TYPE); |
| } |
| |
| } |