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Comments on Cannot write multipart message to byte array

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Cannot write multipart message to byte array [closed]

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Closed as unclear by Alexei‭ on Feb 3, 2022 at 16:30

This question cannot be answered in its current form, because critical information is missing.

This question was closed; new answers can no longer be added. Users with the reopen privilege may vote to reopen this question if it has been improved or closed incorrectly.

I'm trying to write a MIME message to the console.

ByteArrayOutputStream out = new ByteArrayOutputStream();
MimeMultipart replyMsg = mdnCreator.createMDNData();
replyMsg.writeTo(out);
out.close();
System.out.println(new String(out.toByteArray()));

I'm using bouncycastle too in this code. If I use bouncycastle 1.65, it works well. If I use bouncycastle 1.66 or newer, I get this:

Exception in thread "main" javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/report; report-type=disposition-notification; 
boundary="----=_Part_0_1748430839.1643723297884"
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:909)
at javax.activation.DataHandler.writeTo(DataHandler.java:330)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1694)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:996)
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:561)

Do you have any idea why this is happening?

N.B. I'm running my code in an OSGI environment.

java mime bouncycastle osgi
posted almost 3 years ago
3y ago
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artaxerxe‭
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3 comment threads

downvote (2 comments)
I don't get it, `java.mail` doesn't use Bouncy Castle (BC). Perhaps the `mdnCreator.createMDNData()` ... (3 comments)
It looks like there's not enough info in this question to reproduce the problem. https://software.cod... (1 comment)
I don't get it, `java.mail` doesn't use Bouncy Castle (BC). Perhaps the `mdnCreator.createMDNData()` ...
hkotsubo‭ wrote almost 3 years ago · edited almost 3 years ago
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I don't get it, javax.mail doesn't use Bouncy Castle (BC). Perhaps the mdnCreator.createMDNData() method creates an object that uses BC to generate mime data? As you didn't provide the code for createMDNData, I've made a simple test:

ByteArrayInputStream in = new ByteArrayInputStream("abc".getBytes());
ByteArrayOutputStream out = new ByteArrayOutputStream();
MimeMultipart x = new MimeMultipart();
x.addBodyPart(new MimeBodyPart(in), 0);
x.writeTo(out);
System.out.println(new String(out.toByteArray()));

This works regardless of BC version. Actually, it works even without it - as I said, javax.mail doesn't depend on BC for anything, and the problem might be somewhere else...

artaxerxe‭ wrote almost 3 years ago · edited almost 3 years ago
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I didn't say that javax.mail is dependent on bouncycastle. I just presented my scenario. :). Yes, createMDNData() uses some MIME type which is handled by bouncycastle.

hkotsubo‭ wrote almost 3 years ago
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artaxerxe‭ Then please edit the question and show the code that uses Bouncy Castle, specifically the part that fails, so we can reproduce the problem.