Hello AliReza,

On 08/15/2014 12:13 AM, AliReza Khoshgoftar Monfared wrote:

Now a general question ( or request for a word of advice :) ): if you have ultimate flexibility and want to send an integer from one proxy to another. What functions ( modules ) are the best to append and recover it? ( i don't care where it is appended, body or header, etc )

If you just want to send such values around in standard SIP requests, i.e. insert them to an INVITE, I would say that the most canonical and widespread way to do this is via custom SIP headers, e.g.

On the sender:

append_hf("X-Alireza-Rate: 172\r\n");

On the receiver:

if(is_present_hf("X-Alireza-Rate")) { xlog("L_INFO", "Extracted rate is $hdr(X-Alireza-Rate)\n");

# Don't pass this header further upstream.

remove_hf("X-Alireza-Rate"); }

On 08/15/2014 02:43 PM, AliReza Khoshgoftar Monfared wrote:

Thanks very much Alex and Hugh,

I think what Hugh mentioned is the best way to process text in Kamailio without relying on an external tool and it's good to know it, and Alex's suggestion is great for transferring a single number.

It does not have to be a single number. A header can have any value you like, e.g.

X-AliReza-Custom-Header: param1=x;param2=y;param3=z

Which you could then extract with string transformations[1]:

$var(param1) = $(hdr(X-AliReza-Custom-Header){s.select,0,;}); $var(param2) = $(hdr(X-AliReza-Custom-Header){s.select,1,;}); $var(param3) = $(hdr(X-AliReza-Custom-Header){s.select,2,;});

-- Alex

[1] http://www.kamailio.org/wiki/cookbooks/4.1.x/transformations#sselect_index_s...

On 08/15/2014 02:54 PM, AliReza Khoshgoftar Monfared wrote:

Awesome, and I assume to recover the integer value, I need sth like, as well:

$var(param1) = $(var(param1){s.int <http://s.int>});

Yep. In fact, you can chain transformations:

$(hdr(X-AliReza-Custom-Header){s.select,0,;}{s.int});

Sure thing.

The main issue you were having is access to the information you want in the part of the message body where you want it.

Assuming you can get that and that it's formatted in a way that the transformation functions in Kamailio can operate on it, i.e. split by delimiter versus regex extraction, you can pass around anything any way you like. :-)

I think my keyboard battery is failing, it keeps dropping characters… Here’s a better example.

$var(data) = $(rb{re.subst,/^rate is ([0-9]+).*$/\1/});

Regards, Hugh

From: sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of Waite, Hugh Sent: 15 August 2014 10:43 To: Kamailio (SER) - Users Mailing List Subject: Re: [SR-Users] Text Operations on a Message

Hi, The re.subst transformation can be used on variables to extract data. http://www.kamailio.org/wiki/cookbooks/devel/transformations#resubst_express...

$rb is the variable that contains the request body, but you can use $var or $avp variables if doing multiple operations.

$var(data) = (int)$(rb{re.subst,/^rate is ([0-9+).*$/\1});

Regards, Hugh

From: sr-users-bounces@lists.sip-router.orgmailto:sr-users-bounces@lists.sip-router.org [mailto:sr-users-bounces@lists.sip-router.org] On Behalf Of AliReza Khoshgoftar Monfared Sent: 14 August 2014 20:00 To: Kamailio (SER) - Users Mailing List Subject: [SR-Users] Text Operations on a Message

Hi list,

How can I extract a specific part of my message body? I know that "textops" has the function "search_body(re)" but it returns True/False upon finding "re" in the body of the text, how can I return the actual text that regular expression matches?

As an example, my message body is

rate is 172#012

I want to extract the number "172" out of this.

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