org.apache.myfaces.shared_tomahawk.renderkit.ContentTypeUtils Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of tomahawk21 Show documentation
JSF components and utilities that can be used with any JSF implementation. This library is based on the JSF1.1 version of Tomahawk, but with minor source code and build changes to take advantage of JSF2.1 features. A JSF2.1 implementation is required to use this version of the Tomahawk library.
The newest version!
/*
 * 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.shared_tomahawk.renderkit;

import javax.faces.context.FacesContext;

import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRendererUtils;
import org.apache.myfaces.shared_tomahawk.util.StringUtils;

/**
 * 
 * @author Leonardo Uribe
 *
 */
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};


    /**
     * 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].indexOf(contentType) != -1)
            {
                return true;
            }
        }
        return false;
    }

    public static String chooseWriterContentType(String contentTypeListString, 
            String[] htmlContentTypes, String[] xhtmlContentTypes)
    {
        String[] contentTypeList = splitContentTypeListString(contentTypeListString);
        String[] supportedContentTypeArray = HtmlRendererUtils.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.indexOf(supportedContentType) != -1)
                {
                    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;
    }

}