50 lines
1.5 KiB
TypeScript
50 lines
1.5 KiB
TypeScript
import {Request, RequestHandler} from 'express';
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import {DefaultConfig, Logger, Resolvable, UserInfo} from '.';
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import fetch from 'node-fetch';
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const cachedUsers: {[token: string]: UserInfo} = {};
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const router: RequestHandler = (req: Request, res, next) => {
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const resolvable = new Resolvable(async () => {
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if (!DefaultConfig.USERINFO_HEADER) {
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return undefined;
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}
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const token = req.header(DefaultConfig.USERINFO_HEADER);
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if (token && cachedUsers[token]) return cachedUsers[token];
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const url = DefaultConfig.AUTH_PROXY_USERINFO_URL;
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if (token === undefined || url === undefined) {
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return undefined;
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}
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try {
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const expireHeader = req.header(DefaultConfig.EXPIRE_HEADER);
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const expireSecDate = expireHeader && parseInt(expireHeader, 10) || undefined;
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const expiresIn = expireSecDate && expireSecDate * 1000 > Date.now() && expireSecDate * 1000 - Date.now();
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const res = await fetch(url, {headers: [[DefaultConfig.USERINFO_HEADER, token]]});
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const userinfo = await res.json() as UserInfo;
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if (expiresIn) {
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cachedUsers[token] = userinfo;
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setTimeout(() => delete cachedUsers[token], expiresIn);
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}
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return userinfo;
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} catch (e) {
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Logger.warn(e);
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return undefined;
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}
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});
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req.getUserInfo = () => resolvable.resolve();
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res.initLogout = function() {
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const url = DefaultConfig.AUTH_PROXY_INIT_LOGOUT_URL;
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if (url === undefined) {
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return false;
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}
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this.redirect(307, url);
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return true;
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};
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next();
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};
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export const AuthProxy = {
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router,
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};
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