org.apache.camel.component.mail.MailBinding Maven / Gradle / Ivy
/*
* 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.camel.component.mail;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import java.util.UUID;
import jakarta.activation.DataHandler;
import jakarta.activation.DataSource;
import jakarta.mail.Address;
import jakarta.mail.BodyPart;
import jakarta.mail.Header;
import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.Multipart;
import jakarta.mail.Part;
import jakarta.mail.internet.AddressException;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeBodyPart;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMultipart;
import jakarta.mail.internet.MimeUtility;
import jakarta.mail.util.ByteArrayDataSource;
import org.apache.camel.Exchange;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.attachment.Attachment;
import org.apache.camel.attachment.AttachmentMessage;
import org.apache.camel.attachment.DefaultAttachment;
import org.apache.camel.spi.HeaderFilterStrategy;
import org.apache.camel.support.DefaultHeaderFilterStrategy;
import org.apache.camel.support.ExchangeHelper;
import org.apache.camel.support.ObjectHelper;
import org.apache.camel.util.CollectionHelper;
import org.apache.camel.util.FileUtil;
import org.apache.camel.util.IOHelper;
import org.apache.camel.util.StringHelper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import static org.apache.camel.component.mail.MailConstants.MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_NEVER;
import static org.apache.camel.component.mail.MailConstants.MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_UUID;
import static org.apache.camel.component.mail.MailConstants.MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_NEVER;
/**
* A Strategy used to convert between a Camel {@link Exchange} and {@link Message} to and from a Mail
* {@link MimeMessage}
*/
public class MailBinding {
private static final Logger LOG = LoggerFactory.getLogger(MailBinding.class);
private final HeaderFilterStrategy headerFilterStrategy;
private ContentTypeResolver contentTypeResolver;
private boolean decodeFilename;
private boolean mapMailMessage = true;
private boolean failOnDuplicateAttachment;
private String generateMissingAttachmentNames;
private String handleDuplicateAttachmentNames;
public MailBinding() {
headerFilterStrategy = new DefaultHeaderFilterStrategy();
}
@Deprecated
public MailBinding(HeaderFilterStrategy headerFilterStrategy, ContentTypeResolver contentTypeResolver,
boolean decodeFilename) {
this(headerFilterStrategy, contentTypeResolver, decodeFilename, true, false,
MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_NEVER, MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_NEVER);
}
public MailBinding(HeaderFilterStrategy headerFilterStrategy, ContentTypeResolver contentTypeResolver,
boolean decodeFilename, boolean mapMailMessage) {
this(headerFilterStrategy, contentTypeResolver, decodeFilename, mapMailMessage, false,
MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_NEVER, MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_NEVER);
}
public MailBinding(HeaderFilterStrategy headerFilterStrategy, ContentTypeResolver contentTypeResolver,
boolean decodeFilename, boolean mapMailMessage,
boolean failOnDuplicateAttachment) {
this(headerFilterStrategy, contentTypeResolver, decodeFilename, mapMailMessage, failOnDuplicateAttachment,
MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_NEVER, MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_NEVER);
}
public MailBinding(HeaderFilterStrategy headerFilterStrategy, ContentTypeResolver contentTypeResolver,
boolean decodeFilename, boolean mapMailMessage,
boolean failOnDuplicateAttachment, String generateMissingAttachmentNames,
String handleDuplicateAttachmentNames) {
this.headerFilterStrategy = headerFilterStrategy;
this.contentTypeResolver = contentTypeResolver;
this.decodeFilename = decodeFilename;
this.mapMailMessage = mapMailMessage;
this.failOnDuplicateAttachment = failOnDuplicateAttachment;
this.generateMissingAttachmentNames = generateMissingAttachmentNames;
this.handleDuplicateAttachmentNames = handleDuplicateAttachmentNames;
}
public boolean isFailOnDuplicateAttachment() {
return failOnDuplicateAttachment;
}
public void setFailOnDuplicateAttachment(boolean failOnDuplicateAttachment) {
this.failOnDuplicateAttachment = failOnDuplicateAttachment;
}
public void populateMailMessage(MailEndpoint endpoint, MimeMessage mimeMessage, Exchange exchange)
throws MessagingException, IOException {
// camel message headers takes precedence over endpoint configuration
if (hasRecipientHeaders(exchange)) {
setRecipientFromCamelMessage(mimeMessage, endpoint.getConfiguration(), exchange);
} else {
// fallback to endpoint configuration
setRecipientFromEndpointConfiguration(mimeMessage, endpoint, exchange);
}
// set the replyTo if it was passed in as an option in the uri. Note: if it is in both the URI
// and headers the headers win.
String replyTo = exchange.getIn().getHeader(MailConstants.MAIL_REPLY_TO, String.class);
if (replyTo == null) {
replyTo = endpoint.getConfiguration().getReplyTo();
}
if (replyTo != null) {
List replyToAddresses = new ArrayList<>();
for (String reply : splitRecipients(replyTo)) {
replyToAddresses
.add(asEncodedInternetAddress(reply.trim(), determineCharSet(endpoint.getConfiguration(), exchange)));
}
mimeMessage.setReplyTo(replyToAddresses.toArray(new InternetAddress[0]));
}
// must have at least one recipients otherwise we do not know where to send the mail
if (mimeMessage.getAllRecipients() == null) {
throw new IllegalArgumentException("The mail message does not have any recipients set.");
}
// set the subject if it was passed in as an option in the uri. Note: if it is in both the URI
// and headers the headers win.
String subject = endpoint.getConfiguration().getSubject();
if (subject != null) {
mimeMessage.setSubject(subject, ExchangeHelper.getCharsetName(exchange, false));
}
// append the rest of the headers (no recipients) that could be subject, reply-to etc.
appendHeadersFromCamelMessage(mimeMessage, endpoint.getConfiguration(), exchange);
if (empty(mimeMessage.getFrom())) {
// lets default the address to the endpoint destination
String from = endpoint.getConfiguration().getFrom();
mimeMessage.setFrom(asEncodedInternetAddress(from, determineCharSet(endpoint.getConfiguration(), exchange)));
}
// if there is an alternative body provided, set up a mime multipart alternative message
if (hasAlternativeBody(endpoint.getConfiguration(), exchange)) {
createMultipartAlternativeMessage(mimeMessage, endpoint.getConfiguration(), exchange);
} else {
if (exchange.getIn(AttachmentMessage.class).hasAttachments()) {
appendAttachmentsFromCamel(mimeMessage, endpoint.getConfiguration(), exchange);
} else {
populateContentOnMimeMessage(mimeMessage, endpoint.getConfiguration(), exchange);
}
}
}
protected String determineContentType(MailConfiguration configuration, Exchange exchange) {
// see if we got any content type set
String contentType = configuration.getContentType();
if (exchange.getIn().getHeader(MailConstants.MAIL_CONTENT_TYPE) != null) {
contentType = exchange.getIn().getHeader(MailConstants.MAIL_CONTENT_TYPE, String.class);
} else if (exchange.getIn().getHeader(Exchange.CONTENT_TYPE) != null) {
contentType = exchange.getIn().getHeader(Exchange.CONTENT_TYPE, String.class);
}
// fix content-type to have space after semi colons, otherwise some mail servers will choke
if (contentType != null && contentType.contains(";")) {
contentType = MailUtils.padContentType(contentType);
}
if (contentType != null) {
// no charset in content-type, then try to see if we can determine one
String charset = determineCharSet(configuration, exchange);
// must replace charset, even with null in case its an unsupported charset
contentType = MailUtils.replaceCharSet(contentType, charset);
}
LOG.trace("Determined Content-Type: {}", contentType);
return contentType;
}
protected static String determineCharSet(MailConfiguration configuration, Exchange exchange) {
// see if we got any content type set
String contentType = configuration.getContentType();
if (exchange.getIn().getHeader(MailConstants.MAIL_CONTENT_TYPE) != null) {
contentType = exchange.getIn().getHeader(MailConstants.MAIL_CONTENT_TYPE, String.class);
} else if (exchange.getIn().getHeader(Exchange.CONTENT_TYPE) != null) {
contentType = exchange.getIn().getHeader(Exchange.CONTENT_TYPE, String.class);
}
// look for charset
String charset = MailUtils.getCharSetFromContentType(contentType);
if (charset != null) {
charset = IOHelper.normalizeCharset(charset);
if (charset != null) {
boolean supported;
try {
supported = Charset.isSupported(charset);
} catch (IllegalCharsetNameException e) {
supported = false;
}
if (supported) {
return charset;
} else if (!configuration.isIgnoreUnsupportedCharset()) {
return charset;
} else if (configuration.isIgnoreUnsupportedCharset()) {
LOG.warn("Charset: {} is not supported and cannot be used as charset in Content-Type header.", charset);
return null;
}
}
}
// Using the charset header of exchange as a fall back
return ExchangeHelper.getCharsetName(exchange, false);
}
protected String populateContentOnMimeMessage(MimeMessage part, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
String contentType = determineContentType(configuration, exchange);
LOG.trace("Using Content-Type {} for MimeMessage: {}", contentType, part);
String body = exchange.getIn().getBody(String.class);
if (body == null) {
body = "";
}
// always store content in a byte array data store to avoid various content type and charset issues
DataSource ds = new ByteArrayDataSource(body, contentType);
part.setDataHandler(new DataHandler(ds));
// set the content type header afterwards
part.setHeader("Content-Type", contentType);
return contentType;
}
protected String populateContentOnBodyPart(BodyPart part, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
String contentType = determineContentType(configuration, exchange);
if (contentType != null) {
LOG.trace("Using Content-Type {} for BodyPart: {}", contentType, part);
// always store content in a byte array data store to avoid various content type and charset issues
String data = exchange.getContext().getTypeConverter().tryConvertTo(String.class, exchange.getIn().getBody());
// use empty data if the body was null for some reason (otherwise there is a NPE)
data = data != null ? data : "";
DataSource ds = new ByteArrayDataSource(data, contentType);
part.setDataHandler(new DataHandler(ds));
// set the content type header afterwards
part.setHeader("Content-Type", contentType);
}
return contentType;
}
/**
* Extracts the body from the Mail message
*/
public Object extractBodyFromMail(Exchange exchange, MailMessage mailMessage) {
Message message = mailMessage.getMessage();
try {
if (mapMailMessage) {
return message.getContent();
}
return message; // raw message
} catch (Exception e) {
// try to fix message in case it has an unsupported encoding in the Content-Type header
UnsupportedEncodingException uee
= org.apache.camel.util.ObjectHelper.getException(UnsupportedEncodingException.class, e);
if (uee != null) {
LOG.debug("Unsupported encoding detected: {}", uee.getMessage());
try {
String contentType = message.getContentType();
String type = StringHelper.before(contentType, "charset=");
if (type != null) {
// try again with fixed content type
LOG.debug("Trying to extract mail message again with fixed Content-Type: {}", type);
// Since message is read-only, we need to use a copy
MimeMessage messageCopy = new MimeMessage((MimeMessage) message);
messageCopy.setHeader("Content-Type", type);
Object body = messageCopy.getContent();
// If we got this far, our fix worked...
// Replace the MailMessage's Message with the copy
mailMessage.setMessage(messageCopy);
return body;
}
} catch (Exception e2) {
// fall through and let original exception be thrown
}
}
throw new RuntimeCamelException(
"Failed to extract body due to: " + e.getMessage()
+ ". Exchange: " + exchange + ". Message: " + message,
e);
}
}
/**
* Parses the attachments of the given mail message and adds them to the map
*
* @param message the mail message with attachments
* @param map the map to add found attachments (attachmentFilename is the key)
*/
public void extractAttachmentsFromMail(Message message, Map map)
throws MessagingException, IOException {
LOG.trace("Extracting attachments +++ start +++");
Object content = message.getContent();
if (content instanceof Multipart) {
extractAttachmentsFromMultipart((Multipart) content, map);
} else if (content != null) {
LOG.trace("No attachments to extract as content is not Multipart: {}", content.getClass().getName());
}
LOG.trace("Extracting attachments +++ done +++");
}
protected void extractAttachmentsFromMultipart(Multipart mp, Map map)
throws MessagingException, IOException {
for (int i = 0; i < mp.getCount(); i++) {
Part part = mp.getBodyPart(i);
LOG.trace("Part #{}: {}", i, part);
if (part.isMimeType("multipart/*")) {
LOG.trace("Part #{}: is mimetype: multipart/*", i);
extractAttachmentsFromMultipart((Multipart) part.getContent(), map);
} else {
String disposition = part.getDisposition();
String fileName = part.getFileName();
// fix file name if using malicious parameter name
if (fileName != null) {
fileName = fileName.replaceAll("[\n\r\t]", "_");
}
if (isAttachment(disposition) && (fileName == null || fileName.isEmpty())) {
if (generateMissingAttachmentNames != null
&& generateMissingAttachmentNames.equalsIgnoreCase(MAIL_GENERATE_MISSING_ATTACHMENT_NAMES_UUID)) {
fileName = UUID.randomUUID().toString();
}
}
if (fileName != null && decodeFilename) {
fileName = MimeUtility.decodeText(fileName);
}
if (fileName != null) {
fileName = FileUtil.stripPath(fileName);
}
if (fileName != null) {
fileName = fileName.trim();
}
if (LOG.isTraceEnabled()) {
LOG.trace("Part #{}: Disposition: {}", i, disposition);
LOG.trace("Part #{}: Description: {}", i, part.getDescription());
LOG.trace("Part #{}: ContentType: {}", i, part.getContentType());
LOG.trace("Part #{}: FileName: {}", i, fileName);
LOG.trace("Part #{}: Size: {}", i, part.getSize());
LOG.trace("Part #{}: LineCount: {}", i, part.getLineCount());
}
if (validDisposition(disposition, fileName) || (fileName != null && !fileName.isEmpty())) {
LOG.debug("Mail contains file attachment: {}", fileName);
if (handleDuplicateAttachmentNames != null) {
if (handleDuplicateAttachmentNames
.equalsIgnoreCase(MailConstants.MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_UUID_PREFIX)) {
fileName = prefixDuplicateFilenames(map, fileName);
} else if (handleDuplicateAttachmentNames
.equalsIgnoreCase(MailConstants.MAIL_HANDLE_DUPLICATE_ATTACHMENT_NAMES_UUID_SUFFIX)) {
fileName = suffixDuplicateFilenames(map, fileName);
}
}
if (!map.containsKey(fileName)) {
// Parts marked with a disposition of Part.ATTACHMENT are clearly attachments
final DataHandler dataHandler = part.getDataHandler();
final DataSource dataSource = dataHandler.getDataSource();
final DataHandler replacement = new DataHandler(new DelegatingDataSource(fileName, dataSource));
DefaultAttachment camelAttachment = new DefaultAttachment(replacement);
@SuppressWarnings("unchecked")
Enumeration headers = part.getAllHeaders();
while (headers.hasMoreElements()) {
Header header = headers.nextElement();
camelAttachment.addHeader(header.getName(), header.getValue());
}
map.put(fileName, camelAttachment);
} else {
handleDuplicateFileAttachment(mp, fileName);
}
}
}
}
}
/**
* Strategy for handling extracting mail message that has duplicate file attachments
*
* @param mp the multipart entity
* @param duplicateFileName the duplicated file name
* @throws MessagingException is thrown, failing with an error
*/
protected void handleDuplicateFileAttachment(Multipart mp, String duplicateFileName) throws MessagingException {
if (failOnDuplicateAttachment) {
throw new MessagingException("Duplicate file attachment: " + duplicateFileName);
} else {
LOG.warn("Cannot extract duplicate file attachment: {}.", duplicateFileName);
}
}
/**
* Updates already existing filenames in the map and prefixes the current filename
*
* @param map
* @param fileName
* @return
*/
private String prefixDuplicateFilenames(Map map, String fileName) {
if (map.containsKey(fileName)) {
Attachment obj = map.remove(fileName);
map.put(prefixWithUUID(fileName), obj);
return prefixWithUUID(fileName);
}
return fileName;
}
/**
* Updates already existing filenames in the map and suffixes the current filename Filename will be suffixed, the
* file extension will remain If the string starts with a dot and no further dots are contained in the string, this
* is considered as a filename without file extension
*
* @param map
* @param fileName
* @return
*/
private String suffixDuplicateFilenames(Map map, String fileName) {
if (map.containsKey(fileName)) {
Attachment obj = map.remove(fileName);
map.put(suffixWithUUID(fileName), obj);
return suffixWithUUID(fileName);
}
return fileName;
}
private String prefixWithUUID(String string) {
return UUID.randomUUID() + "_" + string;
}
private String suffixWithUUID(String string) {
if (string.lastIndexOf(".") > 0) {
string = new StringBuilder(string).insert(string.lastIndexOf("."), "_" + UUID.randomUUID()).toString();
} else {
string = string + "_" + UUID.randomUUID();
}
return string;
}
private boolean validDisposition(String disposition, String fileName) {
if (fileName == null || fileName.isEmpty()) {
return false;
}
return isAttachment(disposition);
}
private boolean isAttachment(String disposition) {
return disposition != null
&& (disposition.equalsIgnoreCase(Part.ATTACHMENT) || disposition.equalsIgnoreCase(Part.INLINE));
}
/**
* Appends the Mail headers from the Camel {@link MailMessage}
*/
protected void appendHeadersFromCamelMessage(MimeMessage mimeMessage, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
for (Map.Entry entry : exchange.getIn().getHeaders().entrySet()) {
String headerName = entry.getKey();
Object headerValue = entry.getValue();
if (headerValue != null) {
if (headerFilterStrategy != null
&& !headerFilterStrategy.applyFilterToCamelHeaders(headerName, headerValue, exchange)) {
if (headerName.equalsIgnoreCase("subject")) {
mimeMessage.setSubject(asString(exchange, headerValue), determineCharSet(configuration, exchange));
continue;
}
if (headerName.equalsIgnoreCase("from")) {
mimeMessage.setFrom(asEncodedInternetAddress(asString(exchange, headerValue),
determineCharSet(configuration, exchange)));
continue;
}
if (headerName.equalsIgnoreCase("sender")) {
mimeMessage.setSender(asEncodedInternetAddress(asString(exchange, headerValue),
determineCharSet(configuration, exchange)));
continue;
}
if (isRecipientHeader(headerName)) {
// skip any recipients as they are handled specially
continue;
}
// alternative body should also be skipped
if (headerName.equalsIgnoreCase(configuration.getAlternativeBodyHeader())) {
// skip alternative body
continue;
}
// Mail messages can repeat the same header...
if (isCollection(headerValue)) {
Iterator iter = ObjectHelper.createIterator(headerValue);
while (iter.hasNext()) {
Object value = iter.next();
mimeMessage.addHeader(StringHelper.removeCRLF(headerName), asString(exchange, value));
}
} else {
mimeMessage.setHeader(StringHelper.removeCRLF(headerName), asString(exchange, headerValue));
}
}
}
}
}
private void setRecipientFromCamelMessage(MimeMessage mimeMessage, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
for (Map.Entry entry : exchange.getIn().getHeaders().entrySet()) {
String headerName = entry.getKey();
Object headerValue = entry.getValue();
if (headerValue != null && isRecipientHeader(headerName)) {
// special handling of recipients
if (isCollection(headerValue)) {
Iterator iter = ObjectHelper.createIterator(headerValue);
while (iter.hasNext()) {
Object recipient = iter.next();
appendRecipientToMimeMessage(mimeMessage, configuration, exchange,
StringHelper.removeCRLF(headerName), asString(exchange, recipient));
}
} else {
appendRecipientToMimeMessage(mimeMessage, configuration, exchange,
StringHelper.removeCRLF(headerName), asString(exchange, headerValue));
}
}
}
}
/**
* Appends the Mail headers from the endpoint configuration.
*/
protected void setRecipientFromEndpointConfiguration(MimeMessage mimeMessage, MailEndpoint endpoint, Exchange exchange)
throws MessagingException, IOException {
Map recipients = endpoint.getConfiguration().getRecipients();
if (recipients.containsKey(Message.RecipientType.TO)) {
appendRecipientToMimeMessage(mimeMessage, endpoint.getConfiguration(), exchange,
Message.RecipientType.TO.toString(), recipients.get(Message.RecipientType.TO));
}
if (recipients.containsKey(Message.RecipientType.CC)) {
appendRecipientToMimeMessage(mimeMessage, endpoint.getConfiguration(), exchange,
Message.RecipientType.CC.toString(), recipients.get(Message.RecipientType.CC));
}
if (recipients.containsKey(Message.RecipientType.BCC)) {
appendRecipientToMimeMessage(mimeMessage, endpoint.getConfiguration(), exchange,
Message.RecipientType.BCC.toString(), recipients.get(Message.RecipientType.BCC));
}
}
/**
* Appends the Mail attachments from the Camel {@link MailMessage}
*/
protected void appendAttachmentsFromCamel(MimeMessage mimeMessage, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
// Put parts in message
mimeMessage.setContent(createMixedMultipartAttachments(configuration, exchange));
}
private MimeMultipart createMixedMultipartAttachments(MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
// fill the body with text
MimeMultipart multipart = new MimeMultipart();
multipart.setSubType("mixed");
addBodyToMultipart(configuration, multipart, exchange);
String partDisposition = configuration.isUseInlineAttachments() ? Part.INLINE : Part.ATTACHMENT;
AttachmentsContentTransferEncodingResolver contentTransferEncodingResolver
= configuration.getAttachmentsContentTransferEncodingResolver();
if (exchange.getIn(AttachmentMessage.class).hasAttachments()) {
addAttachmentsToMultipart(multipart, partDisposition, contentTransferEncodingResolver, exchange);
}
return multipart;
}
protected void addAttachmentsToMultipart(
MimeMultipart multipart, String partDisposition,
AttachmentsContentTransferEncodingResolver encodingResolver, Exchange exchange)
throws MessagingException {
LOG.trace("Adding attachments +++ start +++");
int i = 0;
for (Map.Entry entry : exchange.getIn(AttachmentMessage.class).getAttachmentObjects().entrySet()) {
String attachmentFilename = entry.getKey();
Attachment attachment = entry.getValue();
if (LOG.isTraceEnabled()) {
LOG.trace("Attachment #{}: Disposition: {}", i, partDisposition);
LOG.trace("Attachment #{}: DataHandler: {}", i, attachment.getDataHandler());
LOG.trace("Attachment #{}: FileName: {}", i, attachmentFilename);
}
if (attachment != null) {
if (shouldAddAttachment()) {
// Create another body part
BodyPart messageBodyPart = new MimeBodyPart();
// Set the data handler to the attachment
messageBodyPart.setDataHandler(attachment.getDataHandler());
// Set headers to the attachment
for (String headerName : attachment.getHeaderNames()) {
List values = attachment.getHeaderAsList(headerName);
for (String value : values) {
messageBodyPart.setHeader(headerName, value);
}
}
// Perform a case insensitive "startsWith" check that works for different locales
String pattern = "cid";
if (attachmentFilename.regionMatches(true, 0, pattern, 0, pattern.length())) {
// add a Content-ID header to the attachment
// must use angle brackets according to RFC: http://www.ietf.org/rfc/rfc2392.txt
messageBodyPart.addHeader("Content-ID", "<" + attachmentFilename.substring(4) + ">");
// Set the filename without the cid
messageBodyPart.setFileName(attachmentFilename.substring(4));
} else {
// Set the filename
messageBodyPart.setFileName(attachmentFilename);
}
LOG.trace("Attachment #{}: ContentType: {}", i, messageBodyPart.getContentType());
if (contentTypeResolver != null) {
String contentType = contentTypeResolver.resolveContentType(attachmentFilename);
LOG.trace("Attachment #{}: Using content type resolver: {} resolved content type as: {}", i,
contentTypeResolver, contentType);
if (contentType != null) {
String value = contentType + "; name=" + attachmentFilename;
messageBodyPart.setHeader("Content-Type", value);
LOG.trace("Attachment #{}: ContentType: {}", i, messageBodyPart.getContentType());
}
}
// set Content-Transfer-Encoding using resolver if possible
resolveContentTransferEncoding(encodingResolver, i, messageBodyPart);
// Set Disposition
messageBodyPart.setDisposition(partDisposition);
// Add part to multipart
multipart.addBodyPart(messageBodyPart);
} else {
LOG.trace("shouldAddAttachment: false");
}
} else {
LOG.warn("Cannot add attachment: {} as DataHandler is null", attachmentFilename);
}
i++;
}
LOG.trace("Adding attachments +++ done +++");
}
protected void resolveContentTransferEncoding(
AttachmentsContentTransferEncodingResolver resolver, int i, BodyPart messageBodyPart)
throws MessagingException {
if (resolver != null) {
String contentTransferEncoding = resolver.resolveContentTransferEncoding(messageBodyPart);
LOG.trace("Attachment #{}: Using content transfer encoding resolver: {} resolved content transfer encoding as: {}",
i, resolver, contentTransferEncoding);
if (contentTransferEncoding != null) {
messageBodyPart.setHeader("Content-Transfer-Encoding", contentTransferEncoding);
}
}
}
protected void createMultipartAlternativeMessage(
MimeMessage mimeMessage, MailConfiguration configuration, Exchange exchange)
throws MessagingException, IOException {
MimeMultipart multipartAlternative = new MimeMultipart("alternative");
mimeMessage.setContent(multipartAlternative);
MimeBodyPart plainText = new MimeBodyPart();
plainText.setText(getAlternativeBody(configuration, exchange), determineCharSet(configuration, exchange));
// remove the header with the alternative mail now that we got it
// otherwise it might end up twice in the mail reader
exchange.getIn().removeHeader(configuration.getAlternativeBodyHeader());
multipartAlternative.addBodyPart(plainText);
// if there are no attachments, add the body to the same mulitpart message
if (!exchange.getIn(AttachmentMessage.class).hasAttachments()) {
addBodyToMultipart(configuration, multipartAlternative, exchange);
} else {
// if there are attachments, but they aren't set to be inline, add them to
// treat them as normal. It will append a multipart-mixed with the attachments and the body text
if (!configuration.isUseInlineAttachments()) {
BodyPart mixedAttachments = new MimeBodyPart();
mixedAttachments.setContent(createMixedMultipartAttachments(configuration, exchange));
multipartAlternative.addBodyPart(mixedAttachments);
} else {
// if the attachments are set to be inline, attach them as inline attachments
MimeMultipart multipartRelated = new MimeMultipart("related");
BodyPart related = new MimeBodyPart();
related.setContent(multipartRelated);
multipartAlternative.addBodyPart(related);
addBodyToMultipart(configuration, multipartRelated, exchange);
AttachmentsContentTransferEncodingResolver resolver
= configuration.getAttachmentsContentTransferEncodingResolver();
addAttachmentsToMultipart(multipartRelated, Part.INLINE, resolver, exchange);
}
}
}
protected void addBodyToMultipart(MailConfiguration configuration, MimeMultipart activeMultipart, Exchange exchange)
throws MessagingException, IOException {
BodyPart bodyMessage = new MimeBodyPart();
populateContentOnBodyPart(bodyMessage, configuration, exchange);
activeMultipart.addBodyPart(bodyMessage);
}
/**
* Strategy to allow filtering of attachments which are added on the Mail message
*/
protected boolean shouldAddAttachment() {
return true;
}
protected Map extractHeadersFromMail(Message mailMessage, Exchange exchange)
throws MessagingException, IOException {
Map answer = new TreeMap<>(String.CASE_INSENSITIVE_ORDER);
Enumeration names = mailMessage.getAllHeaders();
MailConfiguration mailConfiguration = ((MailEndpoint) exchange.getFromEndpoint()).getConfiguration();
while (names.hasMoreElements()) {
Header header = (Header) names.nextElement();
String value = header.getValue();
if (value != null && mailConfiguration.isMimeDecodeHeaders()) {
value = MimeUtility.decodeText(MimeUtility.unfold(value));
}
if (headerFilterStrategy != null
&& !headerFilterStrategy.applyFilterToExternalHeaders(header.getName(), value, exchange)) {
CollectionHelper.appendValue(answer, header.getName(), value);
}
}
// if the message is a multipart message, do not set the content type to multipart/*
if (mapMailMessage) {
Object content = mailMessage.getContent();
if (content instanceof MimeMultipart) {
MimeMultipart multipart = (MimeMultipart) content;
int size = multipart.getCount();
for (int i = 0; i < size; i++) {
BodyPart part = multipart.getBodyPart(i);
content = part.getContent();
// in case of nested multiparts iterate into them
while (content instanceof MimeMultipart) {
if (multipart.getCount() < 1) {
break;
}
part = ((MimeMultipart) content).getBodyPart(0);
content = part.getContent();
}
// Perform a case insensitive "startsWith" check that works for different locales
String prefix = "text";
if (part.getContentType().regionMatches(true, 0, prefix, 0, prefix.length())) {
answer.put(Exchange.CONTENT_TYPE, part.getContentType());
break;
}
}
}
}
if (mailMessage.getSentDate() != null) {
answer.put(Exchange.MESSAGE_TIMESTAMP, mailMessage.getSentDate().getTime());
}
return answer;
}
private static void appendRecipientToMimeMessage(
MimeMessage mimeMessage, MailConfiguration configuration, Exchange exchange,
String type, String recipient)
throws MessagingException, IOException {
List recipientsAddresses = new ArrayList<>();
for (String line : splitRecipients(recipient)) {
String address = line.trim();
// Only add the address which is not empty
if (org.apache.camel.util.ObjectHelper.isNotEmpty(address)) {
recipientsAddresses.add(asEncodedInternetAddress(address, determineCharSet(configuration, exchange)));
}
}
mimeMessage.addRecipients(asRecipientType(type),
recipientsAddresses.toArray(new InternetAddress[0]));
}
private static String[] splitRecipients(String recipients) {
// we support that multi recipient can be given as a string separated by comma or semicolon
// regex ignores comma and semicolon inside of double quotes
return recipients.split("[,;]++(?=(?:(?:[^\\\"]*+\\\"){2})*+[^\\\"]*+$)");
}
/**
* Does the given camel message contain any To, CC or BCC header names?
*/
private static boolean hasRecipientHeaders(Exchange exchange) {
for (String key : exchange.getIn().getHeaders().keySet()) {
if (isRecipientHeader(key)) {
return true;
}
}
return false;
}
protected static boolean hasAlternativeBody(MailConfiguration configuration, Exchange exchange) {
return getAlternativeBody(configuration, exchange) != null;
}
protected static String getAlternativeBody(MailConfiguration configuration, Exchange exchange) {
String alternativeBodyHeader = configuration.getAlternativeBodyHeader();
return exchange.getIn().getHeader(alternativeBodyHeader, java.lang.String.class);
}
/**
* Is the given key a mime message recipient header (To, CC or BCC)
*/
private static boolean isRecipientHeader(String key) {
if (Message.RecipientType.TO.toString().equalsIgnoreCase(key)) {
return true;
} else if (Message.RecipientType.CC.toString().equalsIgnoreCase(key)) {
return true;
} else if (Message.RecipientType.BCC.toString().equalsIgnoreCase(key)) {
return true;
}
return false;
}
/**
* Returns the RecipientType object.
*/
private static Message.RecipientType asRecipientType(String type) {
if (Message.RecipientType.TO.toString().equalsIgnoreCase(type)) {
return Message.RecipientType.TO;
} else if (Message.RecipientType.CC.toString().equalsIgnoreCase(type)) {
return Message.RecipientType.CC;
} else if (Message.RecipientType.BCC.toString().equalsIgnoreCase(type)) {
return Message.RecipientType.BCC;
}
throw new IllegalArgumentException("Unknown recipient type: " + type);
}
private static boolean empty(Address[] addresses) {
return addresses == null || addresses.length == 0;
}
private static String asString(Exchange exchange, Object value) {
String strValue = exchange.getContext().getTypeConverter().convertTo(String.class, exchange, value);
return StringHelper.removeCRLF(strValue);
}
/**
* Returns internet address with encoded personal.
*/
private static InternetAddress asEncodedInternetAddress(String address, String charset)
throws UnsupportedEncodingException, AddressException {
InternetAddress internetAddress = new InternetAddress(address);
internetAddress.setPersonal(internetAddress.getPersonal(), charset);
return internetAddress;
}
private static boolean isCollection(Object value) {
return value instanceof Collection || value != null && value.getClass().isArray();
}
public String getGenerateMissingAttachmentNames() {
return generateMissingAttachmentNames;
}
public void setGenerateMissingAttachmentNames(String generateMissingAttachmentNames) {
this.generateMissingAttachmentNames = generateMissingAttachmentNames;
}
public String getHandleDuplicateAttachmentNames() {
return handleDuplicateAttachmentNames;
}
public void setHandleDuplicateAttachmentNames(String handleDuplicateAttachmentNames) {
this.handleDuplicateAttachmentNames = handleDuplicateAttachmentNames;
}
}
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