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From "Niklas Therning (JIRA)" <server-...@james.apache.org>
Subject [jira] Created: (MIME4J-48) NPE when parsing embedded quoted printable encoded message
Date Fri, 11 Jul 2008 06:31:31 GMT
NPE when parsing embedded quoted printable encoded message
----------------------------------------------------------

                 Key: MIME4J-48
                 URL: https://issues.apache.org/jira/browse/MIME4J-48
             Project: Mime4j
          Issue Type: Bug
    Affects Versions: 0.4
            Reporter: Niklas Therning
             Fix For: 0.4


When trying to parse a message which contains an embedded quoted printable message I received
a NullPointerException:

Exception in thread "main" java.lang.NullPointerException
	at org.apache.james.mime4j.decoder.QuotedPrintableInputStream.populatePushbackQueue(QuotedPrintableInputStream.java:85)
	at org.apache.james.mime4j.decoder.QuotedPrintableInputStream.fillBuffer(QuotedPrintableInputStream.java:119)
	at org.apache.james.mime4j.decoder.QuotedPrintableInputStream.read(QuotedPrintableInputStream.java:57)
	at org.apache.james.mime4j.BufferingInputStreamAdaptor.doReadLine(BufferingInputStreamAdaptor.java:78)
	at org.apache.james.mime4j.BufferingInputStreamAdaptor.readLine(BufferingInputStreamAdaptor.java:68)
	at org.apache.james.mime4j.AbstractEntity.fillFieldBuffer(AbstractEntity.java:129)
	at org.apache.james.mime4j.AbstractEntity.parseField(AbstractEntity.java:162)
	at org.apache.james.mime4j.MimeEntity.advance(MimeEntity.java:97)
	at org.apache.james.mime4j.MimeTokenStream.next(MimeTokenStream.java:363)
	at Mime4jTest.main(Mime4jTest.java:83)

I've figured out that it is the following code in MimeEntity which passes the null stream
when creating the QuotedPrintableInputStream:

    private EntityStateMachine nextMessage() {
        String transferEncoding = body.getTransferEncoding();
        InputStream instream;
        if (MimeUtil.isBase64Encoding(transferEncoding)) {
            log.debug("base64 encoded message/rfc822 detected");
            instream = new Base64InputStream(mimeStream);                    
        } else if (MimeUtil.isQuotedPrintableEncoded(transferEncoding)) {
            log.debug("quoted-printable encoded message/rfc822 detected");
            instream = new QuotedPrintableInputStream(mimeStream);                    
        } else {
            instream = dataStream;
        }

mimeStream seems to be null in this situation. I've tried to use dataStream instead of mimeStream.
This seems to work better but when I do that I get an infinite loop when trying to parse an
embedded multipart message which has =3D in its boundary. I'll attach such a message.

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