Java Code Examples for javax.mail.Part#getHeader()

public static String getFilename( Part Mess ) throws MessagingException{
// Part.getFileName() doesn't take into account any encoding that may have been 
// applied to the filename so in order to obtain the correct filename we
// need to retrieve it from the Content-Disposition

String [] contentType = Mess.getHeader( "Content-Disposition" );
	if ( contentType != null && contentType.length > 0 ){
		int nameStartIndx = contentType[0].indexOf( "filename=\"" );
		if ( nameStartIndx != -1 ){
			String filename = contentType[0].substring( nameStartIndx+10, contentType[0].indexOf( '\"', nameStartIndx+10 ) );
			try {
			filename = MimeUtility.decodeText( filename );
			return filename;
		} catch (UnsupportedEncodingException e) {}
		}  		
	}

	// couldn't determine it using the above, so fall back to more reliable but 
// less correct option
	return Mess.getFileName();
}
 

@SuppressWarnings("squid:S1168")
private static List<String> getHeaderValues(Part part, String headerName) throws MessagingException {
	if (part != null) {
		String[] vals = part.getHeader(headerName);
		if (vals != null) {
			return asList(vals);
		}
	}
	return null;
}
 

private static void setContentFromPart(Message m, Part p, String newText, boolean setTextPlain) throws MessagingException, IOException {
    String contentType = p.getContentType();
    if (setTextPlain) {
        ContentType ct = new ContentType(contentType);
        ct.setPrimaryType("text");
        ct.setSubType("plain");
        contentType = ct.toString();
    }
    m.setContent(newText != null ? newText : p.getContent(), contentType);
    String[] h = p.getHeader("Content-Transfer-Encoding");
    if (h != null && h.length > 0) {
        m.setHeader("Content-Transfer-Encoding", h[0]);
    }
    m.saveChanges();
}
 

public static String getDisposition( Part _mess ) throws MessagingException{
	String dispos = _mess.getDisposition();
// getDisposition isn't 100% reliable 
	if ( dispos == null ){
		String [] disposHdr = _mess.getHeader( "Content-Disposition" );
		if ( disposHdr != null && disposHdr.length > 0 && disposHdr[0].startsWith( Part.ATTACHMENT ) ){
			return Part.ATTACHMENT;
		}
	}
	
	return dispos;
}
 

/**
 * 获取消息附件中的文件.
 * @param part
 *            Part 对象
 * @param resourceList
 *            文件的集合(每个 ResourceFileBean 对象中存放文件名和 InputStream 对象)
 * @throws MessagingException
 *             the messaging exception
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
private void getRelatedPart(Part part, List<ResourceFileBean> resourceList) throws MessagingException, IOException {
	//验证 Part 对象的 MIME 类型是否与指定的类型匹配。
	if (part.isMimeType("multipart/related")) {
		Multipart mulContent = (Multipart) part.getContent();
		for (int j = 0, m = mulContent.getCount(); j < m; j++) {
			Part contentPart = mulContent.getBodyPart(j);
			if (!contentPart.isMimeType("text/*")) {
				String fileName = "Resource";
				//此方法返回 Part 对象的内容类型。
				String type = contentPart.getContentType();
				if (type != null) {
					type = type.substring(0, type.indexOf("/"));
				}
				fileName = fileName + "[" + type + "]";
				if (contentPart.getHeader("Content-Location") != null
						&& contentPart.getHeader("Content-Location").length > 0) {
					fileName = contentPart.getHeader("Content-Location")[0];
				}
				InputStream is = contentPart.getInputStream();
				resourceList.add(new ResourceFileBean(fileName, is));
			}
		}
	} else {
		Multipart mp = null;
		Object content = part.getContent();
		if (content instanceof Multipart) {
			mp = (Multipart) content;
		} else {
			return;
		}
		for (int i = 0, n = mp.getCount(); i < n; i++) {
			Part body = mp.getBodyPart(i);
			getRelatedPart(body, resourceList);
		}
	}
}
 

/**
 * 获取消息附件中的文件.
 * @param part
 *            Part 对象
 * @param resourceList
 *            文件的集合(每个 ResourceFileBean 对象中存放文件名和 InputStream 对象)
 * @throws MessagingException
 *             the messaging exception
 * @throws IOException
 *             Signals that an I/O exception has occurred.
 */
private void getRelatedPart(Part part, List<ResourceFileBean> resourceList) throws MessagingException, IOException {
	//验证 Part 对象的 MIME 类型是否与指定的类型匹配。
	if (part.isMimeType("multipart/related")) {
		Multipart mulContent = (Multipart) part.getContent();
		for (int j = 0, m = mulContent.getCount(); j < m; j++) {
			Part contentPart = mulContent.getBodyPart(j);
			if (!contentPart.isMimeType("text/*")) {
				String fileName = "Resource";
				//此方法返回 Part 对象的内容类型。
				String type = contentPart.getContentType();
				if (type != null) {
					type = type.substring(0, type.indexOf("/"));
				}
				fileName = fileName + "[" + type + "]";
				if (contentPart.getHeader("Content-Location") != null
						&& contentPart.getHeader("Content-Location").length > 0) {
					fileName = contentPart.getHeader("Content-Location")[0];
				}
				InputStream is = contentPart.getInputStream();
				resourceList.add(new ResourceFileBean(fileName, is));
			}
		}
	} else {
		Multipart mp = null;
		Object content = part.getContent();
		if (content instanceof Multipart) {
			mp = (Multipart) content;
		} else {
			return;
		}
		for (int i = 0, n = mp.getCount(); i < n; i++) {
			Part body = mp.getBodyPart(i);
			getRelatedPart(body, resourceList);
		}
	}
}
 

protected List<_BridgeMessageContent> extractContent(Part p) throws MessagingException, IOException {
    if (p.isMimeType("multipart/*")) {
        log.info("Found multipart content, extracting");

        List<_BridgeMessageContent> contents = new ArrayList<>();
        Multipart mp = (Multipart) p.getContent();
        int count = mp.getCount();
        for (int i = 0; i < count; i++) {
            contents.addAll(extractContent(mp.getBodyPart(i)));
        }
        return contents;
    }

    if (p.isMimeType("message/rfc822")) {
        log.info("Found nested content, extracting");
        return extractContent((Part) p.getContent());
    }

    String content = p.getContent().toString();
    String[] encodings = p.getHeader("Content-Transfer-Encoding");
    String encoding = (encodings != null && encodings.length > 0) ? encodings[0] : null;

    if (StringUtils.equalsIgnoreCase("quoted-printable", encoding)) {
        try {
            // TODO actually extract the charset properly
            // TODO read RFC to know default charset
            log.info("Transfer encoding is {}, decoding", encoding);
            content = new String(QuotedPrintableCodec.decodeQuotedPrintable(content.getBytes()));
        } catch (DecoderException e) {
            log.warn("Content transfer encoding is set to {} but enable to decode: {}", encoding, e.getMessage());
        }
    }

    if (p.isMimeType(MimeTypeUtils.TEXT_PLAIN_VALUE)) {
        log.info("Found plain text content");
        return Collections.singletonList(new BridgeMessageTextContent(content, encoding));
    }

    if (p.isMimeType(MimeTypeUtils.TEXT_HTML_VALUE)) {
        log.info("Found HTML content");
        return Collections.singletonList(new BridgeMessageHtmlContent(content, encoding));
    }

    return Collections.emptyList();
}