25 Jun
2009
25 Jun
'09
11:21 a.m.
Hello,
several days ago I committed support for accessing components of xml
documents using pseudo-variables based on XPath syntax. The new
$xml(...) PV is implemented in the presence_xml module as it works with
xml docs and links libxml2.
Short description in the cookbook:
https://sip-router.org/wiki/cookbooks/pseudo-variables/devel#presence_xml_p…
As an example:
- publish has the body:
<?xml version='1.0' encoding='UTF-8'?>
<presence xmlns='urn:ietf:params:xml:ns:pidf'
xmlns:dm='urn:ietf:params:xml:ns:pidf:data-model'
xmlns:rpid='urn:ietf:params:xml:ns:pidf:rpid'
xmlns:c='urn:ietf:params:xml:ns:pidf:cipid'
entity='sip:daniel@asipto.com'>
<tuple id='t8b484917'>
<status><basic>open</basic></status>
</tuple>
<dm:person
id='p7562ef60'><rpid:activities><rpid:unknown/></rpid:activities></dm:person>
</presence>
Getting the presence status:
# this is needed because libxml2 cannot work with default no-prefix ns,
so we alias the "p" prefix.
modparam("presence_xml", "xml_ns",
"p=urn:ietf:params:xml:ns:pidf")
$xml(a=>doc) = $rb;
$xml(a=>xpath:/p:presence/p:tuple/p:status/p:basic)
Next is to update the presence modules to be able to work with the
documents that have been updated in the config.
Comments, opinions and improvements are welcome!
Cheers,
Daniel
--
Daniel-Constantin Mierla
http://www.asipto.com/
25 Jun
25 Jun
11:31 a.m.
New subject: [Kamailio-Users] [sr-dev] new feature: fine access to xml documents
El Jueves, 25 de Junio de 2009, Daniel-Constantin Mierla escribió:
Hello,
several days ago I committed support for accessing components of xml
documents using pseudo-variables based on XPath syntax. The new
$xml(...) PV is implemented in the presence_xml module as it works with
xml docs and links libxml2.
Short description in the cookbook:
https://sip-router.org/wiki/cookbooks/pseudo-variables/devel#presence_xml_p
seudo-variables
As an example:
- publish has the body:
<?xml version='1.0' encoding='UTF-8'?>
<presence xmlns='urn:ietf:params:xml:ns:pidf'
xmlns:dm='urn:ietf:params:xml:ns:pidf:data-model'
xmlns:rpid='urn:ietf:params:xml:ns:pidf:rpid'
xmlns:c='urn:ietf:params:xml:ns:pidf:cipid'
entity='sip:daniel@asipto.com'>
<tuple id='t8b484917'>
<status><basic>open</basic></status>
</tuple>
<dm:person
id='p7562ef60'><rpid:activities><rpid:unknown/></rpid:activities></dm:perso
n> </presence>
Getting the presence status:
# this is needed because libxml2 cannot work with default no-prefix ns,
so we alias the "p" prefix.
modparam("presence_xml", "xml_ns",
"p=urn:ietf:params:xml:ns:pidf")
$xml(a=>doc) = $rb;
$xml(a=>xpath:/p:presence/p:tuple/p:status/p:basic)
Next is to update the presence modules to be able to work with the
documents that have been updated in the config.
Comments, opinions and improvements are welcome!
This is more than great!
It would make possible exotic routing decissions based on presence status...
or perhaps not yet? I understand that this makes possible to extract XML nodes
when processing a request, but would it be possible to extract them from the
"presentity" table?
A simpler approach for what I mean would be having a mini API to get presence
basic status (some module that connects to DB with "presentity" table):
if ( is_presence_basic_status_open($ru) ) {
...route the MESSAGE...
}
XD
--
Iñaki Baz Castillo <ibc(a)aliax.net>
12:55 p.m.
New subject: [Kamailio-Users] [sr-dev] new feature: fine access to xml documents
On 06/25/2009 11:31 AM, Iñaki Baz Castillo wrote:
El Jueves, 25 de Junio de 2009, Daniel-Constantin
Mierla escribió:
... or based on other content of the xml doc -- you may have there geo
positions and send it to the appropriate server.
Hello,
several days ago I committed support for accessing components of xml
documents using pseudo-variables based on XPath syntax. The new
$xml(...) PV is implemented in the presence_xml module as it works with
xml docs and links libxml2.
Short description in the cookbook:
https://sip-router.org/wiki/cookbooks/pseudo-variables/devel#presence_xml_p
seudo-variables
As an example:
- publish has the body:
<?xml version='1.0' encoding='UTF-8'?>
<presence xmlns='urn:ietf:params:xml:ns:pidf'
xmlns:dm='urn:ietf:params:xml:ns:pidf:data-model'
xmlns:rpid='urn:ietf:params:xml:ns:pidf:rpid'
xmlns:c='urn:ietf:params:xml:ns:pidf:cipid'
entity='sip:daniel@asipto.com'>
<tuple id='t8b484917'>
<status><basic>open</basic></status>
</tuple>
<dm:person
id='p7562ef60'><rpid:activities><rpid:unknown/></rpid:activities></dm:perso
n> </presence>
Getting the presence status:
# this is needed because libxml2 cannot work with default no-prefix ns,
so we alias the "p" prefix.
modparam("presence_xml", "xml_ns",
"p=urn:ietf:params:xml:ns:pidf")
$xml(a=>doc) = $rb;
$xml(a=>xpath:/p:presence/p:tuple/p:status/p:basic)
Next is to update the presence modules to be able to work with the
documents that have been updated in the config.
Comments, opinions and improvements are welcome!
This is more than great!
It would make possible exotic routing decissions based on presence status...
or perhaps not yet? I understand that this makes
possible to extract XML nodes
when processing a request, but would it be possible to extract them from the
"presentity" table?
Yes, if you load it you can do it. For example, next piece of config is
valid as well:
$xml(a=>doc) = '<?xml version="1.0"
encoding="UTF-8"?><presence
entity="abc"><mynode>abc</mynode></presence>';
xlog("$xml(a=>xpath:/presence/mynode)\n");
Probably not very clear in my first email, but you can change the xml
content:
$xml(a=>xpath:/presence/mynode) = "123";
Note that if you assigned the sip message body to $xml(name=>doc), body
does not get changed, the operations are done on a replica.
Cheers,
Daniel
A simpler approach for what I mean would be having a
mini API to get presence
basic status (some module that connects to DB with "presentity" table):
if ( is_presence_basic_status_open($ru) ) {
...route the MESSAGE...
}
XD
--
Daniel-Constantin Mierla
http://www.asipto.com/
1:02 p.m.
New subject: [Kamailio-Users] [sr-dev] new feature: fine access to xml documents
El Jueves, 25 de Junio de 2009, Daniel-Constantin Mierla escribió:
Probably not very clear in my first email, but you can
change the xml
content:
$xml(a=>xpath:/presence/mynode) = "123";
When reading, which is the result if the node doesn't exist? empty string?
If a=>xpath:/presence/mynode gets 123 (an integer) can it be used in math
operation as integer? or is it a string?
Note that if you assigned the sip message body to
$xml(name=>doc), body
does not get changed, the operations are done on a replica.
So modifications in the body must be done in the proxy before forwarding the
request to the presence server, or doing a spiral if the presence server is
integrated in the proxy, right?
Thanks.
--
Iñaki Baz Castillo <ibc(a)aliax.net>
4:13 p.m.
New subject: [Kamailio-Users] [sr-dev] new feature: fine access to xml documents
Iñaki Baz Castillo schrieb:
El Jueves, 25 de Junio de 2009, Daniel-Constantin
Mierla escribió:
Hi Daniel!
In sip-router there is functionality to apply lumps before sending (it
is used for SIP-Identity). Maybe this could be exported to script and
can be executed manually to triggering reconstruction of the message,
e.g. for processing the modified message in the presence module.
regards
klaus
Probably not very clear in my first email, but
you can change the xml
content:
$xml(a=>xpath:/presence/mynode) = "123";
When reading, which is the result if the node doesn't exist? empty string?
If a=>xpath:/presence/mynode gets 123 (an integer) can it be used in math
operation as integer? or is it a string?
Note that if you assigned the sip message body to
$xml(name=>doc), body
does not get changed, the operations are done on a replica.
So modifications in the body must be done in the proxy before forwarding the
request to the presence server, or doing a spiral if the presence server is
integrated in the proxy, right?
29 Jun
29 Jun
8:33 p.m.
New subject: [Kamailio-Users] [sr-dev] new feature: fine access to xml documents
On 06/25/2009 04:13 PM, Klaus Darilion wrote:
Iñaki Baz Castillo schrieb:
it does not work
now directly on msg body, but your approach can get
life using set_body() from textops.
Applying lumps would be good to add as experimental function in config,
to see how much it affects the rest.
Cheers,
Daniel
--
Daniel-Constantin Mierla
http://www.asipto.com/
El Jueves, 25 de Junio de 2009, Daniel-Constantin
Mierla escribió:
Hi Daniel!
In sip-router there is functionality to apply lumps before sending (it
is used for SIP-Identity). Maybe this could be exported to script and
can be executed manually to triggering reconstruction of the message,
e.g. for processing the modified message in the presence module. Probably not very clear in my first email, but
you can change the xml
content:
$xml(a=>xpath:/presence/mynode) = "123";
When reading, which is the result if the node doesn't exist? empty
string?
If a=>xpath:/presence/mynode gets 123 (an integer) can it be used in
math operation as integer? or is it a string?
Note that if you assigned the sip message body to
$xml(name=>doc), body
does not get changed, the operations are done on a replica.
So modifications in the body must be done in the proxy before
forwarding the request to the presence server, or doing a spiral if
the presence server is integrated in the proxy, right?
5424
days inactive
5428
days old
5 comments
3 participants
participants (3)
-
Daniel-Constantin Mierla -
Iñaki Baz Castillo -
Klaus Darilion