libs/web/luasrc/sauth.lua

   1 --[[
   2
   3 Session authentication
   4 (c) 2008 Steven Barth <steven@midlink.org>
   5
   6 Licensed under the Apache License, Version 2.0 (the "License");
   7 you may not use this file except in compliance with the License.
   8 You may obtain a copy of the License at
   9
  10         http://www.apache.org/licenses/LICENSE-2.0
  11
  12 $Id$
  13
  14 ]]--
  15 module("luci.sauth", package.seeall)
  16 require("luci.fs")
  17 require("luci.config")
  18
  19
  20 luci.config.sauth = luci.config.sauth or {}
  21 sessionpath = luci.config.sauth.sessionpath
  22 sessiontime = tonumber(luci.config.sauth.sessiontime)
  23
  24
  25 function clean()
  26         local now   = os.time()
  27         local files = luci.fs.dir(sessionpath)
  28
  29         if not files then
  30                 return nil
  31         end
  32
  33         for i, file in pairs(files) do
  34                 local fname = sessionpath .. "/" .. file
  35                 local stat = luci.fs.stat(fname)
  36                 if stat and stat.type == "regular" and stat.atime + sessiontime < now then
  37                         luci.fs.unlink(fname)
  38                 end
  39         end
  40 end
  41
  42 function prepare()
  43         luci.fs.mkdir(sessionpath)
  44         luci.fs.chmod(sessionpath, "a-rwx,u+rwx")
  45 end
  46
  47 function read(id)
  48         if not id then
  49                 return
  50         end
  51         clean()
  52         return luci.fs.readfile(sessionpath .. "/" .. id)
  53 end
  54
  55 function write(id, data)
  56         if not luci.fs.stat(sessionpath) then
  57                 prepare()
  58         end
  59         luci.fs.writefile(sessionpath .. "/" .. id, data)
  60         luci.fs.chmod(sessionpath .. "/" .. id, "a-rwx,u+rw")
  61 end