6 Dec
2010
6 Dec
'10
8:17 p.m.
Hello,
On 12/6/10 6:09 PM, Andreas Granig wrote:
Hi Daniel,
Got it. But what if it gets a bit more difficult than that? :)
I've an xml document where the namespace for some elements changes, like
this:
<?xml version="1.0" encoding="utf-8"?>
<presence xmlns="urn:ietf:params:xml:ns:pidf"
entity="sip:foo@mydomain.com">
<tuple id="86ae65b7-42de-4399-b635-295caad13aac">
<status>
<basic>none</basic>
<geopriv xmlns="urn:ietf:params:xml:ns:pidf:geopriv10">
<location-info>
<location xmlns="http://www.opengis.net/gml">
[snip]
As you can see, the "geopriv" element changes the namespace from
"pidf"
to "pidf:geopriv10". Even giving the full namespace
(".../urn:ietf:params:xml:ns:pidf:geopriv10:geopriv") to capture the
"geopriv" element results in
ERROR: presence_xml [pv_xml.c:310]: unable to evaluate xpath expression
[/pidf:presence/pidf:tuple/pidf:status/urn:ietf:params:xml:ns:pidf:geopriv10:geopriv/83]
Any ideas are highly appreciated :)
you can define many xml_ns parameters, each with different prefix. I
guess the inner xmlns overwrites the other one in your sample xml
document, so you have to use different prefix for that nodes:
modparam("presence_xml", "xml_ns",
"pidf=urn:ietf:params:xml:ns:pidf")
modparam("presence_xml", "xml_ns",
"geop=urn:ietf:params:xml:ns:pidf:geopriv10")
Try a path like:
/pidf:presence/pidf:tuple/pidf:status/geop:geopriv/...
Hope it works.
Daniel
--
Daniel-Constantin Mierla
Kamailio (OpenSER) Advanced Training
Jan 24-26, 2011, Irvine, CA, USA
http://www.asipto.com
How is
this actually supposed to work? What I'd like to do in the end is
extracting for example the "none" from the "basic"-tag by specifying
"xpath:/presence/tuple/status/basic", which also returns an empty string
now, also when appended with "/text()".
the problem is in between IETF
and XML guys :-)
xpath require to use a prefix for namespaces. The SIMPLE guys liked to
set a default one without prefix.
For this case, try:
modparam("presence_xml", "xml_ns",
"pidf=urn:ietf:params:xml:ns:pidf")
then:
xlog("L_INFO",
"tmp2=$xml(x=>xpath:/pidf:presence/pidf:tuple/pidf:status/pidf:basic)\n");