I am using following Java
code to try extract email attachments:
private static List<File> extractAttachment(Message message) {
List<File> attachments = new ArrayList<File>();
try {
Multipart multipart = (Multipart) message.getContent();
for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
System.out.println("bodyPart.getDisposition(): " + bodyPart.getDisposition());
if (!Part.ATTACHMENT.equalsIgnoreCase(bodyPart.getDisposition())) {
continue; // dealing with attachments only
}
InputStream is = bodyPart.getInputStream();
String filePath = "/tmp/" + bodyPart.getFileName();
System.out.println("Saving: " + filePath);
File f = new File(filePath);
FileOutputStream fos = new FileOutputStream(f);
byte[] buf = new byte[4096];
int bytesRead;
while ((bytesRead = is.read(buf)) != -1) {
fos.write(buf, 0, bytesRead);
}
fos.close();
attachments.add(f);
}
} catch (IOException | MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return attachments;
}
However, I always get bodyPart.getDisposition(): null
. Any clue how should I extract inline attachments?
Thanks
PS: I am using Apple Mail
client on my Mac for sending test emails with attachment. Email client however should not be of concern.
I got it, indeed I had to some "recursion" and check for nested content and check for Part.INLINE.equalsIgnoreCase(bodyPart.getDisposition()
.
Below is the code, think will be useful to someone:
private static List<File> extractAttachment(Multipart multipart) {
List<File> attachments = new ArrayList<File>();
try {
for (int i = 0; i < multipart.getCount(); i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
if (bodyPart.getContent() instanceof Multipart) {
// part-within-a-part, do some recursion...
extractAttachment((Multipart) bodyPart.getContent());
}
System.out.println("bodyPart.getDisposition(): " + bodyPart.getDisposition());
if (!Part.INLINE.equalsIgnoreCase(bodyPart.getDisposition())) {
continue; // dealing with attachments only
}
InputStream is = bodyPart.getInputStream();
String filePath = "/tmp/" + bodyPart.getFileName();
System.out.println("Saving: " + filePath);
File f = new File(filePath);
FileOutputStream fos = new FileOutputStream(f);
byte[] buf = new byte[4096];
int bytesRead;
while ((bytesRead = is.read(buf)) != -1) {
fos.write(buf, 0, bytesRead);
}
fos.close();
attachments.add(f);
}
} catch (IOException | MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return attachments;
}
I had a similar issue when messages were sent from a mac with no body content but attachments the attachments were not showing up when iterating over the the initial message content and had to be found recursively as well.
I posted what worked for me below.
private Map<String, String> extractAttachments(Multipart multiPart, Map<String, String> attachmentAndName) {
try {
for (int i = 0; i < multiPart.getCount(); i++) {
BodyPart part = multiPart.getBodyPart(i);
if (part.getContent() instanceof Multipart) {
attachmentAndName = extractAttachments((Multipart) part.getContent(), attachmentAndName);
} else if (part instanceof MimeBodyPart) {
MimeBodyPart mimeBodyPart = (MimeBodyPart) part;
String fileName = createUniqueFileName(mimeBodyPart.getFileName());
if (Part.ATTACHMENT.equalsIgnoreCase(mimeBodyPart.getDisposition())) {
String attachmentAsString = IOUtils.toString(mimeBodyPart.getInputStream(), StandardCharsets.UTF_8);
attachmentAndName.put(fileName, attachmentAsString);
if (SAVE_ATTACHMENTS_LOCALLY) {
saveFile(mimeBodyPart, fileName);
}
}
}
}
} catch (IOException | MessagingException e) {
logger.error("Failed to process attachment. Continuing to process other message parts in search of attachments...");
}
return attachmentAndName;
}
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