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106 lines
3.1 KiB
Lua
106 lines
3.1 KiB
Lua
--
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-- (C) 2013-16 - ntop.org
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--
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dirs = ntop.getDirs()
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package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
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require "lua_utils"
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local json = require('dkjson')
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local stats_type = _GET["stats_type"]
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sendHTTPHeader('text/html; charset=iso-8859-1')
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interface.select(ifname)
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local res = {}
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local aggr = {}
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local selection
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local aggregation
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local labeller
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if stats_type == "severity_pie" or stats_type == "type_pie" then
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if stats_type == "severity_pie" then
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selection = "alert_severity as label, count(*) as value"
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aggregation = "group by label"
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labeller = alertSeverityLabel
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elseif stats_type == "type_pie" then
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selection = "alert_type as label, count(*) as value"
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aggregation = "group by label"
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labeller = alertTypeLabel
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end
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for _, engaged in pairs({true, false}) do
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local r = interface.selectAlertsRaw(engaged, selection, aggregation)
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if r == nil then r = {} end
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-- must aggregate again to sum counters between engaged and closed alerts
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for k, v in ipairs(r) do
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if v["label"] ~= nil then
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v["label"] = labeller(v["label"], true)
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end
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if aggr[v["label"]] ~= nil then
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aggr[v["label"]] = aggr[v["label"]] + v["value"]
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else
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aggr[v["label"]] = v["value"]
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end
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end
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end
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elseif stats_type == "duration_pie" then
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local binner = function(value)
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value = tonumber(value)
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if value == nil then return nil end
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local bin
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if value < 60 then bin = "[0,1)"
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elseif value < 60 * 5 then bin = "[1,5)"
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elseif value < 60 * 10 then bin = "[5,10)"
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else bin = "10+" end
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-- local log_base = 2
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-- local bin = math.floor(math.log(value) / math.log(log_base))
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-- bin = tostring(log_base^bin).." s <= d < "..tostring(log_base^(bin+1)).." s"
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return bin.." min"
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end
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-- engaged
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-- the duration is the current instant minus the alert timestamp
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selection = "(strftime('%s','now') - alert_tstamp) as label, count(*) as value"
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aggregation = "group by label"
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local r_engaged = interface.selectAlertsRaw(true, selection, aggregation)
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if r_engaged == nil then r_engaged = {} end
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-- not engaged
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-- the duration is the difference between the end and the start time
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selection = "(alert_tstamp_end - alert_tstamp) as label, count(*) as value"
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-- we don't take into account 'instant' alerts
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aggregation = "where alert_tstamp_end is not null group by label"
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local r_closed = interface.selectAlertsRaw(false, selection, aggregation)
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if r_closed == nil then r_closed = {} end
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-- let's put things together
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for _, r in pairs({r_engaged, r_closed}) do
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for k, v in ipairs(r) do
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if v["label"] ~= nil then
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v["label"] = binner(v["label"])
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end
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if aggr[v["label"]] ~= nil then
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aggr[v["label"]] = aggr[v["label"]] + v["value"]
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else
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aggr[v["label"]] = v["value"]
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end
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end
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end
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elseif stats_type == "counts_pie" then
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aggr["Engaged"] = interface.getNumAlerts(true)
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aggr["Closed"] = interface.getNumAlerts(false)
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end
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for k, v in pairs(aggr) do
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res[#res + 1] = {label=k, value=tonumber(v)}
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end
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print(json.encode(res, nil))
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