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https://issues.apache.org/jira/browse/MIME4J-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12612780#action_12612780
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Niklas Therning commented on MIME4J-48:
---------------------------------------
Hmmm, ok. But I thought the stream wrapped by the QP stream in my fix is
actually reading from the InputBuffer wrapping the root stream? Shouldn't that
work?
> 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
>
> Attachments: 36442979.msg
>
>
> 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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