[Freeswitch-users] Finding session variables by name pattern

[Michael Collins]

You can use the uuid_dump command to get all the channel variables and
values. Here's some rudimentary code which accepts the uuid as an argument:

-- Lua has no split function, so we need to create one
function string:split( inSplitPattern, outResults )
   if not outResults then
      outResults = {}
   end
   local theStart = 1
   local theSplitStart, theSplitEnd = string.find( self, inSplitPattern,
theStart )
   while theSplitStart do
      table.insert( outResults, string.sub( self, theStart, theSplitStart-1
) )
      theStart = theSplitEnd + 1
      theSplitStart, theSplitEnd = string.find( self, inSplitPattern,
theStart )
   end
   table.insert( outResults, string.sub( self, theStart ) )
   return outResults
end

api = freeswitch.API()
uuid = argv[1]

-- uuid_dump gets all vars for a particular channel
res = api:execute('uuid_dump',uuid)
freeswitch.consoleLog('INFO',"Complete vars list: " .. res .. "\n")

-- lines is a table, one row per var: val pair
lines = string.split(res,"\n")

for i=1,#lines do
  -- check for variable name using pattern match
  -- Adjust the pattern to whatever you are trying to find
  myPattern = 'variable_'
  if string.match(lines[i], myPattern) then
    varval = string.split(lines[i],": ")
    freeswitch.consoleLog("NOTICE","Variable '" .. varval[1] .. "' contains
'" .. varval[2] .. "'\n")
  end
end

I don't know if this is the most efficient way of doing what you're trying
to do but it does demonstrate the power and flexibility of Lua and
FreeSWITCH API's like uuid_dump.

-MC

On Wed, Mar 2, 2016 at 12:05 PM, Oleg Stolyar <olegstolyar at gmail.com> wrote:

> Hi guys,
>
> is there a way to find all the session variable with a certain name
> pattern *in lua*?
>
> For example I need to find all the session variables whose names start
> with "bla_"
>
> As an alternative is there a way to iterate over all the session
> variables?  Then I can just do that and find the variables I need this way.
>
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