[jira] [Commented] (PROTON-2574) ProtonPython3 doesn't include body session in message if body is set to null

["Robbie Gemmell (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PROTON-2574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17563052#comment-17563052 ] 

Robbie Gemmell commented on PROTON-2574:
----------------------------------------

You are correct about what the spec says, this has been noted before by myself and others many years ago. In discussion at the time however both of the primary authors of the AMQP 1.0 spec, who both also wrote the initial versions of Proton, said it was unintended from the wording i.e they intended to allow no-body section the same as all the other sections do. Between that and the fact clients had already been doing it for many years before the issue was first pointed out, it was decided not to change it as doing so wouldnt stop recipients needing to deal with it anyway for all the existing clients. I'll leave this open for now in case any of the devs feel differently now but I would guess not.

> ProtonPython3 doesn't include body session in message if body is set to null
> ----------------------------------------------------------------------------
>
>                 Key: PROTON-2574
>                 URL: https://issues.apache.org/jira/browse/PROTON-2574
>             Project: Qpid Proton
>          Issue Type: Bug
>          Components: python-binding
>    Affects Versions: proton-c-0.37.0
>         Environment: Ubuntu 20.04 in WSL2, python3-qpid-proton/focal,now 0.37.0-1focal+qpid1 amd64, Python 3.8.10, broker is vromero/activemq-artemis running in docker
>            Reporter: Minghua Wu
>            Priority: Minor
>         Attachments: simple_sender.py
>
>
> According to page 82 of the specification
> {quote}• The body consists of one of the following three choices: one or more data sections, one or more amqp-sequence sections, or a single amqp-value section
> {quote}
> There should be *at least one* body section. However, when the body of the message is set to None (which probably should be encoded as amqp-value), there is not any body section found the in receiver side (ie. the payload doesn't come with any section that has the descriptor code 0x75, 0x76 or 0x77)
> A modified "simple_sender.py" example, which is attached, is used as the sender, and the payload bytes received by the receiver are w[ 0x0, 0x53, 0x70, 0x45, 0x0, 0x53, 0x73, 0x45 ] which contains one empty header section (0x70), one empty properties section (0x73) but no body section (any of 0x75, 0x76 or 0x77).



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