【工具链】压测回放：真实流量录制与重放

-- 压测回放：流量录制
local player = class(actor)
local recFile = nil
local function recordRequest(player, api, ts)
    if recFile == nil then
        recFile = io.open("traffic_rec.log", "a")
    end
    recFile:write(ts .. "|" .. api .. "|" .. os.date("%H:%M:%S", ts) .. "\n")
    recFile:flush()
end
local function startRecording(player)
    recFile = io.open("traffic_rec.log", "w")
    recFile:close()
    recFile = nil
    sendmsg(player, 1, 0, "流量录制已开启，覆盖晚高峰 19:00-22:00 窗口。")
end

-- 压测回放：时间轴重放
local player = class(actor)
local function replayTraffic(player, speedUp)
    local lines = {}
    for line in io.lines("traffic_rec.log") do
        lines[#lines + 1] = line
    end
    local prev = 0
    for _, line in ipairs(lines) do
        local ts, api = string.match(line, "(%d+)|([^|]+)")
        local wait = (ts - prev) / (speedUp or 1)
        prev = ts
        setontimer(player, 0, 0, math.max(20, wait * 1000), 0)
        sendmsg(player, 1, 0, "重放 " .. api .. "（间隔 " ..
            string.format("%.2f", wait) .. " 秒）")
    end
end