Cleanup old fontawesome 4 and bootstrap 3

attic/scripts/lua/modules/grafana_utils.lua

@@ -0,0 +1,83 @@
+--
+-- (C) 2013-18 - ntop.org
+--
+
+dirs = ntop.getDirs()
+package.path = dirs.installdir .. "/scripts/lua/modules/?.lua;" .. package.path
+require "lua_utils"
+
+json = require("dkjson")
+
+function isCORSpreflight()
+   if _SERVER["REQUEST_METHOD"] == "OPTIONS"
+     and isEmptyString(_SERVER["Access-Control-Request-Method"]) == false
+     and isEmptyString(_SERVER["Access-Control-Request-Headers"]) == false then
+	return true
+   end
+   return false
+end
+
+function processCORSpreflight()
+   local corsh = {}
+   corsh["Access-Control-Allow-Origin"] = "*"
+   corsh["Access-Control-Allow-Methods"] = "POST, OPTIONS"
+   corsh["Access-Control-Allow-Headers"] = "Content-Type, Authorization"
+   sendHTTPHeader('text/plain', nil, corsh)
+end
+
+function toEpoch(datestring)
+   -- parse
+   local pattern = "(%d+)%-(%d+)%-(%d+)%a(%d+)%:(%d+)%:([%d%.]+)([Z%p])"
+   local year, month, day, hour, minute, seconds, tzoffset = datestring:match(pattern)
+   assert(tzoffset == "Z")
+   seconds = seconds:gsub("%..*", "")
+   local timestamp = os.time( { year=year, month=month, day=day, hour=hour, min=minute, sec=seconds })
+
+   -- convert to localtime
+   -- for this conversion we need precalculated value "zone_diff"
+   local d1 = os.date("*t",  timestamp)
+   local d2 = os.date("!*t", timestamp)
+   d1.isdst = false
+   local zone_diff = math.floor(os.difftime(os.time(d1), os.time(d2)))
+
+   -- now we can perform the conversion (dt -> ux_time):
+   timestamp = timestamp + zone_diff
+
+   -- tprint({datestring=datestring, year=year, month=month, day=day, hour=hour, minute=minute, seconds=seconds, tzoffset=tzoffset, timestamp=timestamp})
+
+   return timestamp
+end
+
+function toSeries(jsonrrd, res, label)
+   for _, rrd in pairs(jsonrrd.series) do
+      local datapoints = {}
+      local instant = jsonrrd.start
+      local scale = 1
+
+      if rrd["label"]:find("bytes") then
+	 -- grafana rates are returned in bits an not bytes per second
+	 scale = 8
+      end
+
+      for _, point in ipairs(rrd["data"]) do
+	 local val     = point
+	 datapoints[#datapoints + 1] = {val * scale, instant * 1000}
+	 instant = instant + jsonrrd.step
+      end
+
+      local target = rrd.tags.protocol or rrd.tags.category or rrd["label"]
+      if label then target = target.." "..label end
+      res[#res + 1] = {target = target, datapoints = datapoints}
+   end
+
+end
+
+if _POST == nil then
+   _POST = {}
+end
+
+if not isEmptyString(_POST["payload"]) then
+   _POST["payload"] = json.decode(_POST["payload"])
+else
+   _POST["payload"] = {}
+end