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-- Copyright 2017 Jo-Philipp Wich <jo@mein.io>
-- Licensed to the public under the Apache License 2.0.
module("luci.controller.nlbw", package.seeall)
function index()
entry({"admin", "nlbw"}, firstchild(), _("Bandwidth Monitor"), 80)
entry({"admin", "nlbw", "display"}, template("nlbw/display"), _("Display"), 1)
entry({"admin", "nlbw", "config"}, cbi("nlbw/config"), _("Configuration"), 2)
entry({"admin", "nlbw", "backup"}, template("nlbw/backup"), _("Backup"), 3)
entry({"admin", "nlbw", "data"}, call("action_data"), nil, 4)
entry({"admin", "nlbw", "list"}, call("action_list"), nil, 5)
entry({"admin", "nlbw", "ptr"}, call("action_ptr"), nil, 6).leaf = true
entry({"admin", "nlbw", "download"}, call("action_download"), nil, 7)
entry({"admin", "nlbw", "restore"}, post("action_restore"), nil, 8)
end
local function exec(cmd, args, writer)
local os = require "os"
local nixio = require "nixio"
local fdi, fdo = nixio.pipe()
local pid = nixio.fork()
if pid > 0 then
fdo:close()
while true do
local buffer = fdi:read(2048)
local wpid, stat, code = nixio.waitpid(pid, "nohang")
if writer and buffer and #buffer > 0 then
writer(buffer)
end
if wpid and stat == "exited" then
break
end
end
elseif pid == 0 then
nixio.dup(fdo, nixio.stdout)
fdi:close()
fdo:close()
nixio.exece(cmd, args, nil)
nixio.stdout:close()
os.exit(1)
end
end
function action_data()
local http = require "luci.http"
local types = {
csv = "text/csv",
json = "application/json"
}
local args = { }
local mtype = http.formvalue("type") or "json"
local delim = http.formvalue("delim") or ";"
local period = http.formvalue("period")
local group_by = http.formvalue("group_by")
local order_by = http.formvalue("order_by")
if types[mtype] then
args[#args+1] = "-c"
args[#args+1] = mtype
else
http.status(400, "Unsupported type")
return
end
if delim and #delim > 0 then
args[#args+1] = "-s%s" % delim
end
if period and #period > 0 then
args[#args+1] = "-t"
args[#args+1] = period
end
if group_by and #group_by > 0 then
args[#args+1] = "-g"
args[#args+1] = group_by
end
if order_by and #order_by > 0 then
args[#args+1] = "-o"
args[#args+1] = order_by
end
http.prepare_content(types[mtype])
exec("/usr/sbin/nlbw", args, http.write)
end
function action_list()
local http = require "luci.http"
local fd = io.popen("/usr/sbin/nlbw -c list")
local periods = { }
if fd then
while true do
local period = fd:read("*l")
if not period then
break
end
periods[#periods+1] = period
end
fd:close()
end
http.prepare_content("application/json")
http.write_json(periods)
end
function action_ptr(...)
local http = require "luci.http"
local util = require "luci.util"
http.prepare_content("application/json")
http.write_json(util.ubus("network.rrdns", "lookup", {
addrs = {...}, timeout = 3000
}))
end
function action_download()
local nixio = require "nixio"
local http = require "luci.http"
local sys = require "luci.sys"
local uci = require "luci.model.uci".cursor()
local dir = uci:get_first("nlbwmon", "nlbwmon", "database_directory")
or "/var/lib/nlbwmon"
if dir and nixio.fs.stat(dir, "type") == "dir" then
local n = "nlbwmon-backup-%s-%s.tar.gz"
%{ sys.hostname(), os.date("%Y-%m-%d") }
http.prepare_content("application/octet-stream")
http.header("Content-Disposition", "attachment; filename=\"%s\"" % n)
exec("/bin/tar", { "-C", dir, "-c", "-z", ".", "-f", "-" }, http.write)
else
http.status(500, "Unable to find database directory")
end
end
function action_restore()
local nixio = require "nixio"
local http = require "luci.http"
local i18n = require "luci.i18n"
local tpl = require "luci.template"
local uci = require "luci.model.uci".cursor()
local tmp = "/tmp/nlbw-restore.tar.gz"
local dir = uci:get_first("nlbwmon", "nlbwmon", "database_directory")
or "/var/lib/nlbwmon"
local fp
http.setfilehandler(
function(meta, chunk, eof)
if not fp and meta and meta.name == "archive" then
fp = io.open(tmp, "w")
end
if fp and chunk then
fp:write(chunk)
end
if fp and eof then
fp:close()
end
end)
local files = { }
local tar = io.popen("/bin/tar -tzf %s" % tmp, "r")
if tar then
while true do
local file = tar:read("*l")
if not file then
break
elseif file:match("^%d%d%d%d%d%d%d%d%.db%.gz$") or
file:match("^%./%d%d%d%d%d%d%d%d%.db%.gz$") then
files[#files+1] = file
end
end
tar:close()
end
if #files == 0 then
http.status(500, "Internal Server Error")
tpl.render("nlbw/backup", {
message = i18n.translate("Invalid or empty backup archive")
})
return
end
local output = { }
exec("/etc/init.d/nlbwmon", { "stop" })
exec("/bin/mkdir", { "-p", dir })
exec("/bin/tar", { "-C", dir, "-vxzf", tmp, unpack(files) },
function(chunk) output[#output+1] = chunk:match("%S+") end)
exec("/bin/rm", { "-f", tmp })
exec("/etc/init.d/nlbwmon", { "start" })
tpl.render("nlbw/backup", {
message = i18n.translatef(
"The following database files have been restored: %s",
table.concat(output, ", "))
})
end
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