Hi Daniel!
IMO a while loop is a good idea. But I think a maximum loop counter
should be added too (maybe as parameter at top of openser.cfg) which
stops the loop and discards the message e.g. after 100 iterations to
prevent an endless loop.
regards
klaus
Daniel-Constantin Mierla schrieb:
Hello,
although is more part of devel, the decision will affect users of future
stable releases, so I posted on both lists.
Maybe some of you noticed that in the ongoing process of improving the
pseudo-variables system, the AVPs and HDRs can be accessed with dynamic
index. That means next lines are correct in the config file.
$var(i) = 1;
xlog("$(avp(i:20)[$var(i)])");
if($(avp(i:20)[$var(i)]) == 3) {
}
In the past, the index was static, as a number.
The question I want to address is whether makes sense to add 'while'
statements to iterate through avps or hdrs. More or less, the cycles can
be done via recursive routes.
The block:
$var(i) = 0;
while($(avp(i:20)[$var(i)]) != null) {
.....
$var(i) = $var(i) +1;
}
is equivalent with:
$var(i) = 0;
route(1);
....
route[1] {
if(($(avp(i:20)[$var(i)]) == null)
return;
...
$var(i) = $var(i) +1;
route(1);
}
'while' may look more attractive, but could open the pandora box, people
asking for more and more, that will turn config language is something
very complex (not saying that is simple now :-) ).
The drawback with recursive routes is the fixed number of routes that
can be defined with the standard openser: 40 (number can be increased if
openser is recompiled), because for each cycle another route has to be
used.
Waiting for your opinions...
Cheers,
Daniel
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