如何在ngx_lua中調用lfs模塊？

我想在我的ngx_lua程序中使用lfs模塊，我從github下載了源碼包，並使用luajit2.0.3進行編譯。靜態文件位於/ usr/local/lib中。我的nginx.conf內容如下：如何在ngx_lua中調用lfs模塊？

http { 
    lua_shared_dict my_cache 10m; 
    lua_package_cpath '/usr/local/lib/lfs.so'; 

    init_worker_by_lua_file 'conf/cop/check1.lua'; 
    ... 
}

的check1.lua的內容如下：

local time_at = ngx.timer.at 
local shared = ngx.shared 
local log = ngx.log 
local delay = 5 
local ngx_err = ngx.ERR 
local handler, updateip, checkfile 
local my_cache = shared["my_cache"] 
local filename = '/home/nginx/conf/cop/ip.txt' 

local lfs = require "lfs" 
local attribute = lfs.attribute 

if not my_cache then 
    log(ngx_err, "disappear the shared dict") 
    return 
end 

checkfile = function (filename) 
    local attr = attributes(filename) 
    if attr then 
     return attr.modification 
    else 
     return nil 
    end 
end 

updateip = function (filename) 
    my_cache:flush_all() 
    local fp = io.open(filename, "r") 
    if not fp then 
     log(ngx_err, "failed to open file") 
     return 
    end 
    for line in fp:lines() do 
     my_cache:set(line, line) 
    end 
end 

handler = function (premature, filename) 
    -- do some routine job in Lua just like a cron job 
    if premature then 
     return 
    end 
    local mod 
    local md5result, flags = my_cache:get("md5") 
    if not md5result then 
     mod = checkfile(filename) 
     updateip(filename) 
     my_cache:set("md5", mod) 
    else 
     mod = checkfile(filename) 
     if mod ~= md5result then 
      updateip(filename) 
      my_cache:set("md5", mod) 
     end 
    end 
    local ok, err = time_at(delay, handler, filename) 
    if not ok then 
     log(ngx_err, "failed to create the timer: ", err) 
     return 
    end 
end 

local ok, err = time_at(delay, handler, filename) 
if not ok then 
    log(ngx_err, "failed to create the timer: ", err) 
    return 
end

當我開始我的nginx的，也有一些不法行爲發生。內容如下：

2014/04/28 16:36:54 [error] 9437#0: lua entry thread aborted: runtime error: 

/home/nginx/conf/cop/check1.lua:22: attempt to call upvalue 'attributes' (a nil value) stack traceback: coroutine 0: 
/home/nginx/conf/cop/check1.lua: in function 'checkfile' 
/home/nginx/conf/cop/check1.lua:50: in function </home/nginx/conf/cop/check1.lua:42>, context: ngx.timer

我該怎麼辦？但是我用的是luajit命令行，這是確定：

LuaJIT 2.0.3 -- Copyright (C) 2005-2014 Mike Pall. http://luajit.org/ 
JIT: ON CMOV SSE2 SSE3 SSE4.1 fold cse dce fwd dse narrow loop abc sink fuse 
> lfs = require "lfs" 
> attr = lfs.attributes('check1.lua') 
> print(attr.modification) 
1398678137 
>

來源

2014-04-28 yakantosat

注意以下幾行：

local attribute = lfs.attribute 
. 
. 
. 
checkfile = function (filename) 
    local attr = attributes(filename)

您所創建的變量attribute從lfs.attribute而不是lfs.attributes。此外，您稍後嘗試撥打attributes而不是attribute。

更改以下

local attribute = lfs.attribute

到

local attributes = lfs.attributes

來源

2014-04-28 10:05:42 hjpotter92

如何在ngx_lua中調用lfs模塊？

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