Re: [netconf] subtree filter any namespace

Martin Bjorklund <mbj@tail-f.com> Tue, 11 February 2020 08:00 UTC

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Date: Tue, 11 Feb 2020 08:59:17 +0100 (CET)
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To: chopps@chopps.org
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From: Martin Bjorklund <mbj@tail-f.com>
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Subject: Re: [netconf] subtree filter any namespace
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Hi,

Christian Hopps <chopps@chopps.org> wrote:
> I've been adding subtree to xpath conversion to my netconf python
> client/server code (with some help from others), and in trying to get
> the "any" namespace stuff working I ran into an issue.
> 
> The client code was setting the default namespace to
> 'xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"' on the top XML rpc
> message element. This had an unwanted side-effect of placing
> everything in a sub-tree filter then into the netconf namespace (if
> none were given). As a work-around I created the filter element with a
> blank default namespace; however, I'm not sure this is correct, i.e.,
> 
> <get>
>  <filter xmlns=''>
>  ... users specified filter ...
>  </filter>
> </get>

This is not correct since it says that "filter" is in the ""
namespace.

> The correct thing is probably to not set the default namespace in the
> client code; however, I'm not sure I can do this now for backward
> compatible reasons. I could do it perhaps if the user specified a
> filter, but I'm curious if it's valid to just set it to
> blank. Googling produced conflicting answers for me.

I don't know how your code works but you need to end up with somthing
like:

  <rpc xmls="urn:ietf:params:xml:ns:netconf:base:1.0">
    <get>
      <filter>
        <top-node-1 xmlns="">
          ...
        </top-node-1>
        <top-node-2 xmlns="">
          ...
        </top-node-2>
      </filter>
    </get>
  </rpc>

OR

  <nc:rpc xmls:nc="urn:ietf:params:xml:ns:netconf:base:1.0">
    <nc:get>
      <nc:filter>
        <top-node-1>
          ...
        </top-node-1>
        <top-node-2>
          ...
        </top-node-2>
      </nc:filter>
    </nc:get>
  </nc:rpc>



/martin



> 
> Thanks,
> Chris.
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