Re: [SR-Users] Check for existence of URI param

Hey,

Alex Balashov wrote:

I have a Contact URI with params as in the following form returned to me in a 302 Moved Temporarily reply:

<sip:a=foo;b;c=bar>

I am able to check the existence of parameters 'a' and 'b', which have values assigned to them, in the following way:

failure_route[...] {
        ...
        $var(dest) = $T_rpl($ct);
        $var(dest) = $(var(dest){nameaddr.uri});
        $var(dest) = $(var(dest){uri.user});
        ...
        if(! $(var(dest){param.value,a})) {
                ....
        }
        ...
}

However, what I cannot seem to figure out is a reliable test condition for the existence of a parameter like 'b', which does not have a value.

One quite hackish (and untested) approach could be to iterate over all {param.count} parameters and see if any {param.name,INDEX} matches "b".

Cheers,

--Timo