[SR-Users] string manipulation from db

[anthony thomas]

Hello list,

I am afraid I am asking something stupid but I cannot find a way to do this cleanly, so here it goes....

I am retrieving values from a db using either carrierroute or mtree modules to send a 302 to my softswitch. It expects the message as: 

SIP/2.0 302 Moved Temporarily
Via: SIP/2.0/UDP 134.111.48.66:5060;branch=zgfdgdfgf2491b5437
Contact: <sip:989897 at X.X.X.X;rg=4003>;q=0.2
Contact: <sip:989897 at X.X.X.X:rg=321>;q=0.8
To: <sip:989897 at X.X.X.X:5066>;tag=1
.....

Where the important things are the rg: those are the trunks in the SS) and the q (probability) and there can be multiple rgs for the same prefix (2 in this example)

My idea was to keep in the db something like this:

Prefix:98
Route:4003,0.2|321,0.8

And then inject those values in the contact header, but I am having a hard time finding the right way to do it. Is there any way to do it without calling the perl module?

Many thanks,

A