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package com.xxx.xxx.util;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.ResourceBundle;
import javax.jcr.Node;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.version.Version;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.io.IOUtils;
import javax.activation.MimetypesFileTypeMap;
/**
* The Class LivelinkDataContentServlet.
*/
public class LivelinkDataContentServlet {
/** The log. */
private static Log log = LogFactory.getLog(LivelinkDataContentServletTest.class);
/** The field. */
private static String field = null;
/** The bundle. */
private static ResourceBundle bundle = null;
/** The livelink connection util. */
private static LivelinkConnectionUtil livelinkConnectionUtil = null;
/**
* Inits the servlet. Specify in web xml init parameter value for fieldName.
* It's the name of input field in web page. <code><init-param>
* <param-name>uuidName</param-name>
* <param-value>uuid</param-value>
* <description>The name of input field</description>
* </init-param></code>
*
* @param config
* the config
*
* @throws ServletException
* the servlet exception
*/
public void init(ServletConfig config) throws ServletException {
if (field == null) {
field = config.getInitParameter("uuidName");
}
if (bundle == null) {
bundle = ResourceBundle.getBundle("livelink");
}
if (livelinkConnectionUtil == null) {
livelinkConnectionUtil = new LivelinkConnectionUtil(bundle);
}
}
/**
* Do get.
*
* @param request
* the request
* @param response
* the response
*
* @throws ServletException
* the servlet exception
* @throws IOException
* Signals that an I/O exception has occurred.
*
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String objectId = request.getParameter(field);
Node document = null;
byte[] contentData = null;
String documentName = null;
String mimeType = null;
try {
document = getDocumentByUuid(objectId);
contentData = getContentDataForDocument(document);
documentName = document.getName();
} catch (RepositoryException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
if (document != null) {
File tempFile = null;
try {
tempFile = createTempFile(documentName, contentData);
} catch (IOException iox) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
}
mimeType = new MimetypesFileTypeMap().getContentType(tempFile);
response.setContentType(mimeType);
response.setContentLength((int) tempFile.length());
response.setHeader("Content-Disposition", "attachment; filename=" + documentName);
response.setHeader("Cache-Control", "private, must-revalidate");
OutputStream out = response.getOutputStream();
try {
out.write(contentData);
out.flush();
} catch (IOException e) {
response.sendError(HttpServletResponse.SC_NOT_FOUND);
} finally {
try {
out.close();
tempFile.delete();
} catch (IOException e) {
throw e;
}
}
}
}
/**
* Creates the temp file.
*
* @param fileName
* the file name
* @param contentData
* the content data
*
* @return the file
*
* @throws IOException
* Signals that an I/O exception has occurred.
*/
private File createTempFile(String fileName, byte[] contentData) throws IOException {
Date date = new Date();
SimpleDateFormat format = new SimpleDateFormat("ddMMMyyyyHHmmss");
File file = new File(fileName + format.format(date));
log.info(file.getAbsolutePath());
OutputStream out = null;
try {
out = new FileOutputStream(file);
out.write(contentData);
out.flush();
} catch (IOException e) {
throw e;
} finally {
if (out != null) {
try {
out.close();
} catch (IOException iox) {
log.warn(iox);
}
}
}
return file;
}
/**
* Gets the document by uuid.
*
* @param uuid
* the uuid
*
* @return the document by uuid
*
* @throws RepositoryException
* the repository exception
*/
private Node getDocumentByUuid(String uuid) throws RepositoryException {
Session session = livelinkConnectionUtil.getSession(LivelinkConnectionUtil.ENTERPRISE_WORKSPACE);
return session.getNodeByUUID(uuid);
}
/**
* Gets the content data for document.
*
* @param document
* the document
*
* @return the content data for document
*
* @throws RepositoryException
* the repository exception
* @throws IOException
* Signals that an I/O exception has occurred.
*/
private byte[] getContentDataForDocument(Node document) throws RepositoryException, IOException {
byte[] contentByte = null;
InputStream in = null;
try {
if (document != null) {
Version version = document.getBaseVersion();
if (version != null) {
in = version.getProperty("ll:contentData").getStream();
if (in != null) {
contentByte = IOUtils.toByteArray(in);
}
}
}
} catch (RepositoryException e) {
throw e;
} catch (IOException e) {
throw e;
} finally {
if (in != null) {
in.close();
}
}
return contentByte;
}
/**
* Do post.
*
* @param request
* the request
* @param response
* the response
*
* @throws ServletException
* the servlet exception
* @throws IOException
* Signals that an I/O exception has occurred.
*
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
}
} |
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