Add old endpoint alert/ts.lua, currently returning 0 counters

scripts/lua/rest/v1/get/alert/ts.lua

@@ -0,0 +1,123 @@
+--
+-- (C) 2013-21 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+package.path = dirs.installdir .. "/scripts/lua/modules/alert_store/?.lua;" .. package.path
+
+local alert_utils = require "alert_utils"
+local alert_consts = require "alert_consts"
+local alert_entities = require "alert_entities"
+local rest_utils = require("rest_utils")
+local alert_severities = require "alert_severities"
+local auth = require "auth"
+-- local flow_alert_store = require "flow_alert_store".new()
+-- local host_alert_store = require "host_alert_store".new()
+
+--
+-- Read alerts data as timeseries (number of alerts per hour)
+-- Example: curl -u admin:admin -H "Content-Type: application/json" -d '{"ifid": "6", "status": "historical-flows", "epoch_begin": 1590226522, "epoch_end": 1590485722}' http://localhost:3000/lua/rest/v1/get/alert/ts.lua
+--
+-- NOTE: in case of invalid login, no error is returned but redirected to login
+--
+
+sendHTTPHeader('application/json')
+
+local rc = rest_utils.consts.success.ok
+local res = {}
+
+local ifid = _GET["ifid"]
+local what = _GET["status"] -- historical, historical-flows
+local epoch_begin = _GET["epoch_begin"]
+local epoch_end = _GET["epoch_end"]
+local alert_type = _GET["alert_type"]
+local alert_severity = _GET["alert_severity"]
+local host_info = url2hostinfo(_GET)
+
+if not auth.has_capability(auth.capabilities.alerts) then
+   rest_utils.answer(rest_utils.consts.err.not_granted)
+   return
+end
+
+if isEmptyString(ifid) then
+   rc = rest_utils.consts.err.invalid_interface
+   rest_utils.answer(rc)
+   return
+end
+
+interface.select(ifid)
+
+if isEmptyString(what) then
+   rc = rest_utils.consts.err.invalid_args
+   print(rest_utils.rc(rc))
+   return
+end
+
+if isEmptyString(epoch_begin) or isEmptyString(epoch_end) then
+   rc = rest_utils.consts.err.invalid_args
+   print(rest_utils.rc(rc))
+   return
+end
+
+epoch_begin = tonumber(epoch_begin);
+epoch_end = tonumber(epoch_end);
+
+if epoch_end <= epoch_begin then
+   rc = rest_utils.consts.err.invalid_args
+   print(rest_utils.rc(rc))
+   return
+end
+
+local hour_secs = 60*60
+local day_secs = 60*60*24
+
+-- Round begin to start of day
+epoch_begin = epoch_begin - (epoch_begin % day_secs)
+
+-- Round end to end of day
+epoch_end = epoch_end - (epoch_end % day_secs) + day_secs
+
+local days = (epoch_end - epoch_begin) / day_secs
+
+local engaged = false
+if what == "engaged" then
+   engaged = true
+end
+
+for day = 1, days do
+   local day_epoch = epoch_begin + ((day - 1) * day_secs)
+
+   res[day_epoch] = {
+      0, --[[ Counter for alerts between 00:00 and 00:59 UTC --]]
+      0, --[[ Counter for alerts between 01:00 and 01:59 UTC --]]
+      0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 --[[ Counter for alerts in other hours, until 23:00 to 23:59 --]]
+   }
+end
+
+--[[
+This API is no longer supported - returning 0 counters for the time being
+
+local counters = alert_utils.getNumAlertsPerHour(what, epoch_begin, epoch_end, alert_type, alert_severity, host_info)
+
+if counters == nil then
+   rc = rest_utils.consts.err.internal_error
+   print(rest_utils.rc(rc)) 
+   return
+end
+
+for k,v in ipairs(counters) do
+   -- Midnight UTC of the day containing v.hour
+   local day_epoch = v.hour - (v.hour % day_secs)
+
+   -- Hour of the day containing v.hour, from 0 to 23, inclusive
+   -- NOTE: Use the `floor` to make sure hour is an integer as it will be used to index a Lua array
+   local hour = math.floor((v.hour - day_epoch) / hour_secs) 
+
+   -- Here we add 1 to the hour as Lua array are indexed starting from 1, whereas `hour` is an integer starting from zero
+   res[day_epoch][hour + 1] = tonumber(v.count)
+end -- for
+--]]
+
+print(rest_utils.rc(rc, res))
+