Adds new REST API v2/

Addresses #5269

scripts/lua/rest/v2/get/host/l7/stats.lua

@@ -0,0 +1,85 @@
+--
+-- (C) 2013-21 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local rest_utils = require("rest_utils")
+local stats_utils = require("stats_utils")
+
+--
+-- Read statistics about nDPI application protocols for a hsot
+-- Example: curl -u admin:admin -H "Content-Type: application/json" -d '{"ifid": "1", "host": "192.168.1.1"}' http://localhost:3000/lua/rest/v2/get/host/l7/stats.lua
+--
+-- NOTE: in case of invalid login, no error is returned but redirected to login
+--
+
+local rc = rest_utils.consts.success.ok
+local res = {}
+
+local ifid = _GET["ifid"]
+local host_info = url2hostinfo(_GET)
+local breed = _GET["breed"]
+local ndpi_category = _GET["ndpi_category"]
+
+if isEmptyString(ifid) then
+   rc = rest_utils.consts.err.invalid_interface
+   rest_utils.answer(rc)
+   return
+end
+
+local show_breed = false
+if breed == "true" then
+   show_breed = true
+end
+
+local show_ndpi_category = false
+if ndpi_category == "true" then
+   show_ndpi_category = true
+end
+
+interface.select(ifid)
+
+local ndpi_protos = interface.getnDPIProtocols()
+
+local function getAppUrl(app)
+   if ndpi_protos[app] ~= nil then
+      return ntop.getHttpPrefix().."/lua/flows_stats.lua?application="..app
+   end
+   return nil
+end
+
+local tot = 0
+
+local stats = interface.getHostInfo(host_info["host"], host_info["vlan"])
+
+if stats == nil then
+   rest_utils.answer(rest_utils.consts.err.not_found)
+   return
+end
+
+tot = stats["bytes.sent"] + stats["bytes.rcvd"]
+
+local _ifstats = computeL7Stats(stats, show_breed, show_ndpi_category)
+
+for key, value in pairsByValues(_ifstats, rev) do
+
+   local duration = 0
+
+   if(stats["ndpi"][key] ~= nil) then
+      duration = stats["ndpi"][key]["duration"]
+   end
+
+   res[#res + 1] = {
+      label = key,
+      value = value,
+      duration = duration,
+   }
+
+end
+
+local collapsed = stats_utils.collapse_stats(res, 1, 3 --[[ threshold ]])
+
+rest_utils.answer(rc, collapsed)