io.stdout:write("appender.lua greets you!\n")
io.stdout:flush()

return {
    recv = function(self)
            local line, err = self.super:recv()
            if line == nil then return line, err end
            return "Received: "..line
        end,
    send = function(self, buf) self.super:send("Sending: "..buf) end
}