Dead-simple awesome transmission indicator using lua-transmission

gistfile1.lua

function create_indicator()
    local rpc = require 'transmissionrpc.client'
    local utils = require 'transmissionrpc.utils'
    c = rpc.new("transmission", 9091)
    local UPDATE_FREQ = 5

    transmission_indicator = wibox.widget.textbox()
    transmission_indicator:set_text("...")
    local updating = false
    local update_timer = timer({ timeout = UPDATE_FREQ })
    update_timer:connect_signal("timeout", function()
        if updating then
            return
        end
        updating = true
        local ok, stats = pcall(function ()
            return c:rpccall("session-stats")
        end)
        if (not ok) then
            transmission_indicator:set_text("E")
            error(stats)
        end
        local a = stats.arguments
        local str = string.format("U: %s D: %s (%2d/%2d)",
        utils.nice_speed(a.uploadSpeed),
        utils.nice_speed(a.downloadSpeed),
        a.activeTorrentCount, a.torrentCount)
        transmission_indicator:set_text(str)
        updating = false
    end)
    update_timer:start()
    return transmission_indicator
end