Set up lua GeoIP handler registration and Cloudflare GeoIP header example plugin

examples/plugins/cloudflare_geoip.lua

@@ -0,0 +1,35 @@
+local geoip = require("geoip")
+local log = require("gclog")
+
+local geoip_header = "CF-IPCountry"
+
+CFGeoIP = {}
+
+function CFGeoIP:new()
+	local t = setmetatable({}, {__index = CFGeoIP})
+	return t
+end
+
+function CFGeoIP:init()
+	log.info_log():Str("dbType", "cloudflare"):Msg("GeoIP initialized")
+end
+
+function CFGeoIP:close()
+	return ">:("
+end
+
+function CFGeoIP.get_country(request, board, errEv)
+	local abbr = request.Header:Get(geoip_header)
+	local name, err = geoip.country_name(abbr)
+	if(err ~= nil) then
+		errEv:Err(err):Caller():Send()
+		return nil, err
+	end
+	return {
+		flag = abbr,
+		name = name
+	}, nil
+end
+
+-- local cf = CFGeoIP:new()
+geoip.register_handler("cloudflare", CFGeoIP)