OpenWrt Luci 调试日志输出的一种方法

luci原生的调试接口用起来不太舒服，在网上搜到如下调试方法。

将下面的lua代码保存为 log.lua，然后放置于 /usr/lib/lua/luci ，即可在 luci 任意目录进行调用

local M = {}

local tconcat = table.concat
local tinsert = table.insert
local srep = string.rep

local function local_print(str)
    local dbg = io.open("/tmp/luci.output", "a+")
    local str = str or ""
    if dbg then
        dbg:write(str..'
')
        dbg:close()
    end
end

function M.print(...)
    local dbg = io.open("/tmp/luci.output", "a+")
    if dbg then
        dbg:write(os.date("[%H:%M:%S]: "))
        for _, o in ipairs({...}) do
            dbg:write(tostring(o)..'  ')
        end
        dbg:write("
")
        dbg:close()
    end
end

function M.print_r(data, depth)
    local depth = depth or 3
    local cstring = "";
    local top_flag = true

    local function table_len(t)
    local i = 0
    for k, v in pairs(t) do
        i = i + 1
    end
    return i
    end

    local function tableprint(data,cstring, local_depth)
        if data == nil then
            local_print("core.print data is nil");
        end

        local cs = cstring .. "    ";
    if top_flag then
            local_print(cstring .."{");
        top_flag = false
    end
        if(type(data)=="table") then
            for k, v in pairs(data) do
        if type(v) ~= "table" then
            if type(v) == "string" then
                        local_print(cs..tostring(k).." = ".."'"..tostring(v).."'");
            else
                        local_print(cs..tostring(k).." = "..tostring(v));
            end
        elseif table_len(v) == 0 then
            local_print(cs..tostring(k).." = ".."{}")
        elseif local_depth < depth then
                    local_print(cs..tostring(k).." = {");
                      tableprint(v,cs,local_depth+1);
        else
            local_print(cs..tostring(k).." = ".."{*}")
        end
            end
        else
            local_print(cs..tostring(data));
        end
        local_print(cstring .."}");
    end

    tableprint(data,cstring,0);
end

return M

调用方法：

-- 以刚刚代码块为例子
local password
-- 导入log模块
local log = require "luci.log"
-- 获取传入数据
password = luci.http.formvalue('password')
-- 打印log
log.print(password)
log.print_r(password)

在终端用tail -f跟踪日志输出文件/tmp/luci.output

tail -f /tmp/luci.output

转自https://blog.csdn.net/bailyzheng/article/details/48663369