【网络通信】消息去重：重连后的重复包过滤

local lastSeq = {}
local chTime = {}
local function isDup(ch, seq)
    local last = lastSeq[ch] or 0
    if seq <= last then return true end
    lastSeq[ch] = seq
    chTime[ch] = os.time()
    return false
end

local dropCnt = 0
SL:RegisterLuaNetMsg(7001, function(data)
    if isDup(1, data.seq) then
        dropCnt = dropCnt + 1
        if dropCnt > 50 then
            SL:ShowSystemTips("网络波动，已忽略 " .. dropCnt .. " 条重复数据")
            dropCnt = 0
        end
        return
    end
    refreshBag(data)
end)
SL:Schedule(function()
    local now = os.time()
    for ch, ts in pairs(chTime) do
        if now - ts > 3600 then
            lastSeq[ch] = nil
            chTime[ch] = nil
        end
    end
end, 600)