Initial implementation of custom_data.lua host rest endpoint

scripts/lua/rest/v1/get/host/custom_data.lua

@@ -0,0 +1,64 @@
+--
+-- (C) 2013-20 - ntop.org
+--
+
+local dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+
+require "lua_utils"
+local json = require ("dkjson")
+local tracker = require("tracker")
+local rest_utils = require("rest_utils")
+
+--
+-- Read information about a host and maps host fields into custom fields
+-- Example: curl -s -u admin:admin  -H "Content-Type: application/json" -d '{"host": "192.168.2.222", "ifid":"0"}' http://localhost:3000/lua/rest/v1/get/host/custom_data.lua
+--
+-- NOTE: in case of invalid login, no error is returned but redirected to login
+--
+
+sendHTTPHeader('application/json')
+
+local rc = rest_utils.consts_ok
+local res = {}
+
+local ifid = _GET["ifid"]
+local host_info = url2hostinfo(_GET)
+local field_alias = _GET["field_alias"]
+
+-- whether to return host statistics: on by default
+local host_stats           = _GET["host_stats"]
+
+if isEmptyString(ifid) then
+   print(rest_utils.rc(rest_utils.consts_invalid_interface))
+   return
+end
+
+if isEmptyString(host_info["host"]) or isEmptyString(field_alias) then
+   print(rest_utils.rc(rest_utils.consts_invalid_args))
+   return
+end
+
+interface.select(ifid)
+
+local host = interface.getHostInfo(host_info["host"], host_info["vlan"])
+
+if not host then
+   print(rest_utils.rc(rest_utils.consts_not_found))
+   return
+end
+
+field_alias = field_alias:split(",") or {field_alias}
+
+for _, fa in pairs(field_alias) do
+   local field, alias = fa:split("=")
+   if host[field] then
+      -- TODO: implement
+      res[alias] = host[field]
+   end
+end
+
+tracker.log("host_get_json", {host_info["host"], host_info["vlan"]})
+
+print(rest_utils.rc(rc, res))
+