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https://issues.apache.org/jira/browse/CXF-6891?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270618#comment-15270618
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Sergey Beryozkin commented on CXF-6891:
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Thanks for the tests, I added one of them to newly added IOUtilsTest.
http://git-wip-us.apache.org/repos/asf/cxf/commit/986231de
> IOUtils.isEmpty() doesn't reinclude byte in stream.
> ---------------------------------------------------
>
> Key: CXF-6891
> URL: https://issues.apache.org/jira/browse/CXF-6891
> Project: CXF
> Issue Type: Bug
> Components: JAX-RS, Tooling
> Affects Versions: 3.1.6
> Reporter: Luca Tabone
> Fix For: 3.0.10, 3.1.7, 3.2.0
>
> Attachments: cxf-bug.zip
>
>
> While trying to integrate Katharsis with CXF I faced a problem related to
> IOUtils.isEmpty() method.
> When isEmpty is invoked with an InputStream that:
> 1. Is not 'mark supported' and
> 2. The 'available()' method returns '0'.
> The byte that is read from the stream (used to determine whether the stream
> is empty or not) is not re-included back to the stream. When I explored the
> code inside PushbackInputStream class, I found that the byte is only being
> included inside the PushbackInputStream.buf (using unread(byte[], int, int)
> method).
> Find attached Maven Project containing 2 test cases.
> References:
> > IOUtils:
> https://cxf.apache.org/javadoc/latest/org/apache/cxf/helpers/IOUtils.html
> > PushbackInputStream:
> https://docs.oracle.com/javase/7/docs/api/java/io/PushbackInputStream.html
> > Katharsis.io: http://katharsis.io
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