a better KODI handler

[gjniewenhuijse]

How to make a handler that interacts with KODI. 
Data can be send to kodi on port 9090 (or another port you configured) using a raw connection with putty.

My goal:
- send command to kodi, for example i can send this command: { "jsonrpc": "2.0", "id": 1, "method": "Application.SetVolume", "params": { "volume": 53 } }
- receive executed events from kodi, for example i receive this command: {"jsonrpc":"2.0","method":"GUI.OnScreensaverDeactivated","params":{"data":{"shuttingdown":false},"sender":"xbmc"}}
- receive commands from my lm/hl over udp and send them to kodi

I like to have this all in one handler. I have already a piece of code that works, but its to slow. It waits on udp command and that interrups my receiving events.

Maybe using copas or something solved the issue, but how?

kodiHandler("192.168.x.x","9090","12007")

Code:

-- library function kodiHandler(iServer,iPort,sendPort)  -- first call  if not ready then    require('socket')    require('json')         lastdatareceived = nil    ready = true  end    -- client connected  if connected then    while true do      char, err = client:receive(1)      -- error while receiving, closed socket      if err == 'closed' then          connected = false        sleep(1)        break      end              if char ~= nil then        lastdatareceived = os.time()        warningclosed = true        warningfailed = true        warningerrors = true        warningtimeou = true                         table.insert(buffer, char)        tmpbuf = table.concat(buffer)        if ( json.pdecode(tmpbuf) ) then          data = tmpbuf          parse(data)          buffer = {}        end      else        now = os.time()        deltatime = now - lastdatareceived      end              -- receive incoming send requests          msg, ip, port = sendServer:receivefrom()             if msg then        -- send command        --log("send: "..msg)        client:send(msg)             end            --[[ clear not complete buffer      if deltatime > 10 and #buffer > 0 then        log( #buffer )        buffer = {}        lastdatareceived = os.time()      end      -]]    end        -- first call or previously disconnected  else    -- close previous connection when disconnected    if client then      client:close()      client = nil    end    if sendServer then      sendServer:close()      sendServer = nil    end        -- create tcp client    client = socket.tcp()    client:settimeout(5)    connected, err = client:connect(iServer, iPort)        -- connect ok, reset buffer    if connected then      lastdatareceived = os.time()      warningclosed = true      warningfailed = true      warningerrors = true      warningtimeou = true      --log('[KODI-client] connection ok: '..iServer)      buffer = {}            -- create udp server to receive incoming send requests             if not sendServer then               sendServer = socket.udp()               sendServer:setsockname('*', sendPort)               sendServer:settimeout(0.1)             end            sleep(5)            -- send initial command      --client:send( '{"jsonrpc": "2.0", "method": "Player.PlayPause", "params": { "playerid": 0 }, "id": 1}' )                -- error while connecting,    else             --log(err)      if warningfailed then log('[KODI-client] connection failed (conn): '.. err) end      warningfailed = false      sleep(5)    end  end    -- incoming command parser  function parse(data)    -- log other info, not mapped, if useful    --log("data received: "..data)    --log(json.pdecode(data))  end end