Initial Commit

src/utils/auth-proxy.ts

@@ -0,0 +1,37 @@
+import {Request, RequestHandler} from 'express';
+import {Config, Logger} from '.';
+import {Resolvable} from './helpers/resolvable';
+import fetch from 'node-fetch';
+import * as properUrlJoin from 'proper-url-join';
+const urlJoin = properUrlJoin as unknown as properUrlJoin.default;
+
+export const setupAuthProxy: RequestHandler = (req: Request, res, next) => {
+	const resolvable = new Resolvable<UserInfo|undefined>(async () => {
+		if (!Config.USERINFO_HEADER) {
+			return undefined;
+		}
+		const token = req.header(Config.USERINFO_HEADER);
+		const url = Config.AUTH_PROXY_USERINFO_URL || Config.AUTH_PROXY_URL && urlJoin(Config.AUTH_PROXY_URL, "userinfo");
+		if (token === undefined || url === undefined) {
+			return undefined;
+		}
+		try {
+			const res = await fetch(url, {headers: [[Config.USERINFO_HEADER, token]]});
+			return await res.json();
+		} catch (e) {
+			Logger.warn(e);
+			return undefined;
+		}
+	});
+
+	req.getUserInfo = () => resolvable.resolve();
+	res.initLogout = function() {
+		const url = Config.AUTH_PROXY_INIT_LOGOUT_URL || Config.AUTH_PROXY_URL && urlJoin(Config.AUTH_PROXY_URL, "init-logout");
+		if (url === undefined) {
+			return false;
+		}
+		this.redirect(307, url);
+		return true;
+	}
+	next();
+}