corner.orm.tapestry.utils.ComponentResponseUtils.java Source code

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Here is the source code for corner.orm.tapestry.utils.ComponentResponseUtils.java

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// Copyright 2007 the original author or authors.
// site: http://www.bjmaxinfo.com
// file: $Id: ComponentResponseUtils.java 3678 2007-11-14 04:43:52Z jcai $
// created at:2007-06-14
//
// Licensed 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 corner.orm.tapestry.utils;

import java.io.IOException;
import java.util.Calendar;

import org.apache.commons.codec.EncoderException;
import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.net.URLCodec;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.web.WebResponse;

/**
 * ??corner
 * 
 * @author <a href=mailto:Ghostbb@bjmaxinfo.com>Ghostbb</a>
 * @version $Revision: 3678 $
 * @since 0.8.5.1
 */
public class ComponentResponseUtils {

    private static final Log log = LogFactory.getLog(ComponentResponseUtils.class);
    /**
     * ?Excel??
     * 
     * full:?? page:????
     */
    public static final String EXCEL_DATA_GENERATE_TYPE_FULL = "full";// ?

    public static final String EXCEL_DATA_GENERATE_TYPE_PAGE = "page";// ???

    /**  * */
    private final static String ATTACHEMENT_FILE = "attachment; filename=\"%s\";";

    /** firefox base64? * */
    private final static String MOZILLA_DOWNLOAD_FILE_NAME = "=?UTF-8?B?%s?=";

    // ??encode
    // ?http://eddysheng.javaeye.com/blog/50414
    private static String processFileName(String fileName, String agent) throws IOException {
        String codedfilename = fileName;
        if (null != agent && -1 != agent.indexOf("MSIE")) {// IE

            //apachecodeC?:
            //http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6437829
            URLCodec codec = new URLCodec("UTF-8");
            try {
                codedfilename = codec.encode(fileName);
            } catch (EncoderException e) {
                log.warn(e);
            }
        } else if (null != agent && -1 != agent.indexOf("Mozilla")) { // Mozilla
            // firefox
            codedfilename = String.format(MOZILLA_DOWNLOAD_FILE_NAME,
                    new String(Base64.encodeBase64(fileName.getBytes("UTF-8"))));
        }
        return codedfilename;
    }

    /**
     * ????resoonse
     * 
     * @param fileName
     * @throws IOException
     */
    public static void constructResponse(String fileName, String extensionName, IRequestCycle requestCycle,
            WebResponse response) throws IOException {
        if (fileName == null || fileName.length() == 0) {// ????
            Calendar c = Calendar.getInstance();
            fileName = String.format("%1$tY%1$tm%1$td%1$tH%1$tM%1$tS%1$tL", c);
        }
        // ?
        if (extensionName != null && extensionName.trim().length() > 0) {
            fileName += extensionName;
        }
        // agent,??
        String userAgent = requestCycle.getInfrastructure().getRequest().getHeader("USER-AGENT");
        response.setHeader("Content-Disposition",
                String.format(ATTACHEMENT_FILE, processFileName(fileName, userAgent)));
    }
}