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Cache used disk space (#3421)

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This commit is contained in:
Alfredo Cardigliano 2020-02-15 12:12:44 +01:00
parent 330379cb89
commit c31db3ac38
2 changed files with 30 additions and 32 deletions
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37
scripts/lua/modules/lua_utils.lua
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@ -3318,18 +3318,37 @@ end
-- Returns the size of a folder (size is in bytes)
function getFolderSize(path)
local size = 0
local folder_size_key = "ntopng.cache.folder_size"
local now = os.time()
local expiration = 30 -- sec
local size = nil
if ntop.isWindows() then
-- TODO
size = 0 -- TODO
else
if ntop.isdir(path) then
local line = os_utils.execWithOutput("du -s "..path.." 2>/dev/null")
local values = split(line, '\t')
if #values >= 1 then
local used = tonumber(values[1])
if used ~= nil then
size = used*1024
-- Check the cache for a recent value
local time_size = ntop.getHashCache(folder_size_key, path)
if not isEmptyString(time_size) then
local values = split(time_size, ',')
if #values >= 2 and tonumber(values[1]) >= (now - expiration) then
size = tonumber(values[2])
end
end
if size == nil then
size = 0
-- Read disk utilization
if ntop.isdir(path) then
local line = os_utils.execWithOutput("du -s "..path.." 2>/dev/null")
local values = split(line, '\t')
if #values >= 1 then
local used = tonumber(values[1])
if used ~= nil then
size = math.ceil(used*1024)
-- Cache disk utilization
ntop.setHashCache("ntopng.cache.folder_size", path, now..","..size)
end
end
end
end