Examples with DefaultTnefToICalendar com.zimbra.cs.util.tnef.DefaultTnefToICalendar used on opensource projects

Example 1 with DefaultTnefToICalendar

use of com.zimbra.cs.util.tnef.DefaultTnefToICalendar in project zm-mailbox by Zimbra.

the class TnefConverter method expandTNEF.

/**
 * Performs the TNEF->MIME conversion on any TNEF body parts that
 * make up the given message.
 * @throws ServiceException
 */
private MimeMultipart expandTNEF(MimeBodyPart bp) throws MessagingException, IOException {
    if (!TNEFUtils.isTNEFMimeType(bp.getContentType()))
        return null;
    MimeMessage converted = null;
    // convert TNEF to a MimeMessage and remove it from the parent
    InputStream is = null;
    try {
        TNEFInputStream tnefis = new TNEFInputStream(is = bp.getInputStream());
        converted = TNEFMime.convert(JMSession.getSession(), tnefis);
    // XXX bburtin: nasty hack.  Don't handle OOME since JTNEF can allocate a huge byte
    // array when the TNEF file is malformed.  See bug 42649.
    // } catch (OutOfMemoryError e) {
    // Zimbra.halt("Ran out of memory while expanding TNEF attachment", e);
    } catch (Throwable t) {
        ZimbraLog.extensions.warn("Conversion failed.  TNEF attachment will not be expanded.", t);
        return null;
    } finally {
        ByteUtil.closeStream(is);
    }
    Object convertedContent = converted.getContent();
    if (!(convertedContent instanceof MimeMultipart)) {
        ZimbraLog.extensions.debug("TNEF attachment doesn't contain valid MimeMultiPart");
        return null;
    }
    MimeMultipart convertedMulti = (MimeMultipart) convertedContent;
    // make sure that all the attachments are marked as attachments
    for (int i = 0; i < convertedMulti.getCount(); i++) {
        BodyPart subpart = convertedMulti.getBodyPart(i);
        if (subpart.getHeader("Content-Disposition") == null)
            subpart.setHeader("Content-Disposition", Part.ATTACHMENT);
    }
    // Create a MimeBodyPart for the converted data.  Currently we're throwing
    // away the top-level message because its content shows up as blank after
    // the conversion.
    MimeBodyPart convertedPart = new ZMimeBodyPart();
    convertedPart.setContent(convertedMulti);
    // If the TNEF object contains calendar data, create an iCalendar version.
    MimeBodyPart icalPart = null;
    if (DebugConfig.enableTnefToICalendarConversion) {
        try {
            TnefToICalendar calConverter = new DefaultTnefToICalendar();
            ZCalendar.DefaultContentHandler icalHandler = new ZCalendar.DefaultContentHandler();
            if (calConverter.convert(mMimeMessage, bp.getInputStream(), icalHandler)) {
                if (icalHandler.getNumCals() > 0) {
                    List<ZVCalendar> cals = icalHandler.getCals();
                    Writer writer = new StringWriter(1024);
                    ICalTok method = null;
                    for (ZVCalendar cal : cals) {
                        cal.toICalendar(writer);
                        if (method == null)
                            method = cal.getMethod();
                    }
                    writer.close();
                    icalPart = new ZMimeBodyPart();
                    icalPart.setText(writer.toString());
                    ContentType ct = new ContentType(MimeConstants.CT_TEXT_CALENDAR);
                    ct.setCharset(MimeConstants.P_CHARSET_UTF8);
                    if (method != null)
                        ct.setParameter("method", method.toString());
                    icalPart.setHeader("Content-Type", ct.toString());
                }
            }
        } catch (ServiceException e) {
            throw new MessagingException("TNEF to iCalendar conversion failure: " + e.getMessage(), e);
        } catch (Throwable t) {
            // don't allow TNEF errors to crash server
            ZimbraLog.extensions.warn("Failed to convert TNEF to iCal", t);
            throw new MessagingException("TNEF to iCalendar conversion failure");
        }
    }
    // create a multipart/alternative for the TNEF and its MIME version
    MimeMultipart altMulti = new ZMimeMultipart("alternative");
    // altMulti.addBodyPart(bp);
    altMulti.addBodyPart(convertedPart);
    if (icalPart != null)
        altMulti.addBodyPart(icalPart);
    return altMulti;
}