🔒 register proxy ip check

src/util/ipAddress.ts

@@ -0,0 +1,87 @@
+import { Request } from "express";
+import { Config } from "../../../server-util/dist";
+// use ipdata package instead of simple fetch because of integrated caching
+import IPData, { LookupResponse } from "ipdata";
+
+var ipdata: IPData;
+const cacheConfig = {
+	max: 1000, // max size
+	maxAge: 1000 * 60 * 60 * 24 // max age in ms (i.e. one day)
+};
+
+const exampleData = {
+	ip: "",
+	is_eu: true,
+	city: "",
+	region: "",
+	region_code: "",
+	country_name: "",
+	country_code: "",
+	continent_name: "",
+	continent_code: "",
+	latitude: 0,
+	longitude: 0,
+	postal: "",
+	calling_code: "",
+	flag: "",
+	emoji_flag: "",
+	emoji_unicode: "",
+	asn: {
+		asn: "",
+		name: "",
+		domain: "",
+		route: "",
+		type: "isp"
+	},
+	languages: [
+		{
+			name: "",
+			native: ""
+		}
+	],
+	currency: {
+		name: "",
+		code: "",
+		symbol: "",
+		native: "",
+		plural: ""
+	},
+	time_zone: {
+		name: "",
+		abbr: "",
+		offset: "",
+		is_dst: true,
+		current_time: ""
+	},
+	threat: {
+		is_tor: false,
+		is_proxy: false,
+		is_anonymous: false,
+		is_known_attacker: false,
+		is_known_abuser: false,
+		is_threat: false,
+		is_bogon: false
+	},
+	count: 0,
+	status: 200
+};
+
+export async function IPAnalysis(ip: string): Promise<LookupResponse> {
+	const { ipdataApiKey } = Config.get().security;
+	if (!ipdataApiKey) return { ...exampleData, ip };
+	if (!ipdata) ipdata = new IPData(ipdataApiKey, cacheConfig);
+
+	return await ipdata.lookup(ip);
+}
+
+export function isProxy(data: LookupResponse) {
+	if (data.asn.type !== "isp") return true;
+	if (Object.values(data.threat).some((x) => x)) return true;
+
+	return false;
+}
+
+export function getIpAdress(req: Request): string {
+	// @ts-ignore
+	return req.headers[Config.get().security.forwadedFor] || req.socket.remoteAddress;
+}