[sr-dev] Lua sr.pv.get and htable pv problem

[Jasmin Schnatterbeck]

Hi Daniel,

when printing fscript only, there is no output line in the log. So I 
added the following code:

if(fscript == nil) then
	sr.log("warn","Filterscript is nil")
elseif(fscript == 0) then
	sr.log("warn","Filterscript is 0 n")
elseif(fscript == "0") then
	sr.log("warn","Filterscript is 0 s")
else
	sr.log("info","fscript found")
end

And the output is:

  WARNING: app_lua [app_lua_sr.c:99]: Filterscript is nil

So nothing is returned at all. But the htable entry is definitely set, 
because it works in some cases (without changing anything) and in some 
cases not. According to sht_dump, everything seems to be ok.

When using pv index like sr.pv.get("$(hdr(X-Test)["..i.."])") , a 
similar problem occurs (sometimes the value is returned, sometimes not). 
When omitting the pv index at all, it works everytime...
So may the dynamic name of the variable is the problem? But (according 
to the debug message) the pv cache check function gets the correct name...

Cheers
Jasmin

Am 01.03.2013 17:49, schrieb Daniel-Constantin Mierla:
> Hello,
>
> On 3/1/13 3:40 PM, Jasmin Schnatterbeck wrote:
>> Hi,
>>
>> when using sr.pv.get() in app_lua the pv value is not always returned.
>>
>> Lua code is:
>>
>> local fscript = sr.pv.get("$(sht(myscripts=>" .. args["filterid"] .."))")
>>
>>     if(fscript) then
>>         sr.log("info","Filterscript is " .. fscript)
>>     else
>>         sr.log("warn","fscript not found!")
>>     end
>>
>>
>> And log shows:
>>
>> app_lua [app_lua_sr.c:888]: pv get: (sht(myscripts=>1))
>>  <core> [pvapi.c:318]: pvar [$(sht(myscripts=>1))] found in cache
>> WARNING: app_lua [app_lua_sr.c:99]: fscript not found!
>>
>> So the pv is being discovered in the pv cache, but sr.pv.get() returns
>> no value.
>>
>> I think the problem occurs especially in the case, when using
>> sht_reload mi command. So I have had a short look into htable.c and I
>> did not find any code, that clears the pv cache... is that
>> necessary/may the reason for the problem, that pv is found in pv cache
>> but nothing returned? (kamailio 3.2.3)
>>
>> Thanks for any ideas...
> the cache is for PV names, not for PV values. What is printed as value
> of fscript anyhow? It might get 0 which will result in same logic with IF.
>
> Cheers,
> Daniel
>