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From "Niklas Therning (JIRA)" <server-...@james.apache.org>
Subject [jira] Created: (MIME4J-47) Nested multipart messages with non-empty epilogue cause indefinite loop
Date Thu, 10 Jul 2008 15:42:31 GMT
Nested multipart messages with non-empty epilogue cause indefinite loop
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                 Key: MIME4J-47
                 URL: https://issues.apache.org/jira/browse/MIME4J-47
             Project: Mime4j
          Issue Type: Bug
    Affects Versions: 0.4
            Reporter: Niklas Therning


I'm attaching a very simple message which causes the current version of Mime4j to loop indefinitely
when the following app is run:

  public static void main(String[] args) throws IOException {
      String msg = "36368753.msg";
      MimeTokenStream stream = new MimeTokenStream();
      stream.parse(new FileInputStream(msg));
            
      while (stream.getState() != EntityStates.T_END_OF_STREAM) {
          stream.next();
      }
  }

If the line 'foo' is removed completely the message will parse as expected. I've tried to
figure out why this happens. It seems like the MimeBoundaryInputStream becomes out of sync
for the outer multipart at the end. The skipBoundary() method is called when read() is invoked
even though we're not at the boundary yet which means that the end boundary won't be detected
properly. One observation I did is that reset() doesn't set eof to false. If I do that in
reset() the mail parses as expected:

    public void reset() {
        atBoundary = false;
        limit = -1;
        eof = false;
    }

I could check in this fix myself but I do not know enough about the recent changes in Mime4j
to be able to determine if this is the correct way to fix this problem.

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