Hi Tito,
A very interesting question. After a bit of research, I can tell you
that $json and $var will behave quite similarly in terms of performance
when using the simple "=" (assign) operator. A difference between them
worth pointing out is that $var uses only-pkg memory, while $json uses
both pkg and system memory (since it is based on the "json-c" library) -
so the more $json's you fill up, the more "opensipsctl fifo
get_statistics pkmem:" will be incorrect.
If you really want to optimize something about that _specific_ code:
$json(authbody) :=$json(authresponse);
if ($json(authbody/message/AcceptCall) == "false") {
...
}
Best regards,
Liviu Chircu
OpenSIPS Developer
http://www.opensips-solutions.com
On 17.06.2015 02:18, Tito Cumpen wrote:
Group,
Is there a downside to casting responses from a rest response into a
json object rather than a generic $var? Here is my function it works
but I want to be aware if this will cost a considerable amount of
resources.
if
(!rest_get("http://myauthurl.com/authme/$fU/$rU
<http://myauthurl.com/authme/$fU/$rU>", "$json(authresponse)",
"$var(ct)", "$var(rcode)")) {
xlog("Error code $var(rcode) in HTTP GET!\n");
xlog("on account of admittance error we are sending the call to the AS
server for processing");
route(4);
}
xlog("got this body response from authority on invite
$json(authresponse) with response code $var(rcode)");
xlog("response now casting to json $json(authresponse) ");
$json(authbody) :="{}";
$json(authbody) :=$json(authresponse);
xlog(" accessing the message $json(authbody/message)");
$json(accept) := $json(authbody/message);
xlog(" casted message $json(accept)");
if($json(accept/AcceptCall) == "false"){
xlog("response equal false");
route(3);
}else{
Notice how the response is casted from $json(authresponse) to
$json(authbody) after it is initialized. I came to realize that I had
to initialize a variable because I couldn't access keys in
$json(authresponse).
Thanks,
Tito
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