106 lines
2.9 KiB
JavaScript
106 lines
2.9 KiB
JavaScript
const concat = require('concat-stream');
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const Cookies = require('cookies');
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const jwt = require('jsonwebtoken');
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const ignition = require('ghost-ignition');
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const {
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UnauthorizedError,
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BadRequestError
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} = ignition.errors;
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const EMPTY = {};
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const SIX_MONTHS_MS = 1000 * 60 * 60 * 24 * 184;
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const wrapFn = (fn, cookieConfig) => (req, res) => {
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return new Promise((resolve, reject) => {
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const cookies = new Cookies(req, res, cookieConfig);
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req.on('error', reject);
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req.pipe(concat(function (buff) {
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const body = buff.toString();
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resolve(fn(req, res, {body, cookies}));
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}));
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});
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};
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module.exports = function create(options = EMPTY) {
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if (options === EMPTY) {
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throw new Error('Must pass options');
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}
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const {
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cookieMaxAge = SIX_MONTHS_MS,
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cookieSecure = true,
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cookieName = 'members-ssr',
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cookiePath = '/',
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cookieKeys,
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membersApi
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} = options;
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if (!membersApi) {
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throw new Error('Missing option membersApi');
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}
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if (!cookieKeys) {
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throw new Error('Missing option cookieKeys');
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}
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const cookieConfig = {
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keys: [].concat(cookieKeys),
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secure: cookieSecure
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};
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const verifyJwt = token => membersApi.getPublicConfig().then(({publicKey, issuer}) => {
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return new Promise((resolve, reject) => {
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jwt.verify(token, publicKey, {
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algorithms: ['RS512'],
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issuer,
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audience: issuer
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}, (err, claims) => {
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if (err) {
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reject(new UnauthorizedError({err}));
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}
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resolve(claims);
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});
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});
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});
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const exchangeTokenForSession = wrapFn((req, res, {body, cookies}) => {
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const token = body;
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if (!body || typeof body !== 'string') {
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return Promise.reject(new BadRequestError({
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message: 'Expected body containing JWT'
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}));
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}
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return verifyJwt(token).then(() => {
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cookies.set(cookieName, token, {
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signed: true,
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httpOnly: true,
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sameSite: 'lax',
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maxAge: cookieMaxAge,
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path: cookiePath
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});
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});
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}, cookieConfig);
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const getMemberDataFromSession = wrapFn((req, res, {cookies}) => {
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try {
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const token = cookies.get(cookieName, {
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signed: true
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});
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return verifyJwt(token).then((claims) => {
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return membersApi.getMember(claims.sub, token);
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});
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} catch (e) {
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return Promise.reject(new BadRequestError({
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message: `Cookie ${cookieName} not found`
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}));
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}
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}, cookieConfig);
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return {
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exchangeTokenForSession,
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getMemberDataFromSession
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};
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};
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