[SR-Users] Parameters list transformations comma and semi column conflict

[Peter Dunkley]

Hello,

There should be no '' around the delimiter.  That's why the documentation
says "single character".  The '' in the documentation are there because the
convention in the documentation is to surround literal examples in '' - you
can see this throughout that wiki-page.

I neither expected comma to work as a delimiter nor expected it not to
work.  However, I did think there was a chance it would.  I now suspect
comma is one of the few delimiters that won't work and this is probably
because the transformation parser doesn't handle them as it interprets them
as the separator for transformation arguments.

As was pointed out these transformations were originally for parsing SIP
header and URI parameters which are always delimited with semi-colon.  I
extended them to take an optional delimiter so that they could be used to
parse HTTP URI parameters which are delimited by ampersand.  I would never
expect to have comma delimited parameters in SIP or HTTP, so I did not
consider comma when I extended the transformation.

Regards,

Peter


On 18 October 2013 21:54, Seudin Kasumovic <seudin.kasumovic at gmail.com>wrote:

> Hi Peter,
>
> I tried transformation {pram.value,name['delimiter']} for 4.1.0-pre0:
>
> $(*avp*(my_var){param.value, a, ';'})
>
> and got parsing error:
>
> 0(32237) ERROR: pv [pv_trans.c:2386]: tr_parse_paramlist(): invalid
> separator in transformation: value,a,';'}
> 0(32237) ERROR: <core> [pvapi.c:1586]: tr_lookup(): error parsing
> [{param.value,a,';'}]
> 0(32237) ERROR: <core> [pvapi.c:972]: pv_parse_spec2(): bad tr in pvar
> name "avp"
> 0(32237) ERROR: <core> [pvapi.c:998]: pv_parse_spec2(): invalid parsing in
> [$(avp(my_var){param.value,a,';'})] at (4)
>
> If set delimiter without quotes (documentation isn't clear for this), e.g.
>
> $(*avp*(my_var){param.value, a, ;})
>
> then no parsing complain. But, get same wrong results, for parameter
> value not quoted if contains ','.
>
> Is this expected behavior?
>
> Regards,
> Seudin
>
>
> On Fri, Oct 18, 2013 at 10:41 AM, Seudin Kasumovic <
> seudin.kasumovic at gmail.com> wrote:
>
>> Hello,
>>
>> will try this feature...
>>
>> thank you Peter.
>>
>>
>> On Thu, Oct 17, 2013 at 5:36 PM, Peter Dunkley <
>> peter.dunkley at crocodilertc.net> wrote:
>>
>>> Hello,
>>>
>>> Parameters to SIP headers are ';' separated.  ',' is used to concatenate
>>> multiple headers onto a single line.  The {param...} transformation is
>>> intended to process SIP header parameters.
>>>
>>> However, there is a new feature in Kamailio 4.1 (currently in a
>>> pre-release/testing phase) that allows you to specify the delimiter value.
>>>  That may do what you require.
>>>
>>> Please see:
>>> http://www.kamailio.org/wiki/cookbooks/devel/transformations#paramvalue_name_delimiter
>>>
>>> Regards,
>>>
>>> Peter
>>>
>>>
>>> On 17 October 2013 16:04, Seudin Kasumovic <seudin.kasumovic at gmail.com>wrote:
>>>
>>>> Hi,
>>>>
>>>> Transformation {param.value, param_name} returns incomplete or empty
>>>> values when parameter value contains comma (,).
>>>>
>>>> See next example:
>>>>
>>>> *$avp*(my_var)="a=val_a1,val_a2,val_a3;b=val_b";
>>>>
>>>> in next transformations:
>>>>
>>>> $(*avp*(my_var){param.value, a}) returns 'val_a1'
>>>> $(*avp*(my_var){param.value, b}) returns empty string
>>>>
>>>> Seams that comma in parameter value conflicts with semi column
>>>> separator.
>>>>
>>>> Is this bug or wrong documented?
>>>>
>>>> Related link:
>>>>
>>>> http://www.kamailio.org/wiki/cookbooks/4.0.x/transformations#paramvalue_name
>>>>
>>>> --
>>>> Seudin Kasumovic
>>>> Tuzla, Bosnia
>>>>
>>>> _______________________________________________
>>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>>> sr-users at lists.sip-router.org
>>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>>
>>>>
>>>
>>>
>>> --
>>> Peter Dunkley
>>> Technical Director
>>>  Crocodile RCS Ltd
>>>
>>> _______________________________________________
>>> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>> sr-users at lists.sip-router.org
>>> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>>
>>
>>
>> --
>> MSC Seudin Kasumovic
>> Tuzla, Bosnia
>>
>
>
>
> --
> MSC Seudin Kasumovic
> Tuzla, Bosnia
>
> _______________________________________________
> SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
> sr-users at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>


-- 
Peter Dunkley
Technical Director
Crocodile RCS Ltd
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