walnut.js/lib/apis.js

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'use strict';
module.exports.create = function (xconfx, apiFactories, apiDeps) {
var PromiseA = apiDeps.Promise;
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var mkdirpAsync = PromiseA.promisify(require('mkdirp'));
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//var express = require('express');
var express = require('express-lazy');
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var fs = PromiseA.promisifyAll(require('fs'));
var path = require('path');
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var localCache = { rests: {}, pkgs: {} };
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var promisableRequest = require('./common').promisableRequest;
var rejectableRequest = require('./common').rejectableRequest;
var crypto = require('crypto');
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// TODO xconfx.apispath
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xconfx.restPath = path.join(__dirname, '..', '..', 'packages', 'rest');
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xconfx.apiPath = path.join(__dirname, '..', '..', 'packages', 'api');
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xconfx.appApiGrantsPath = path.join(__dirname, '..', '..', 'packages', 'client-api-grants');
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xconfx.appConfigPath = path.join(__dirname, '..', '..', 'var');
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function notConfigured(req, res) {
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var msg = "api package '" + req.pkgId + "' not configured for client uri '" + req.experienceId + "'"
+ ". To configure it place a new line '" + req.pkgId + "' in the file '/srv/walnut/packages/client-api-grants/" + req.experienceId + "'"
;
res.send({ error: { message: msg } });
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}
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/*
function isThisPkgInstalled(myConf, pkgId) {
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}
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*/
function isThisClientAllowedToUseThisPkg(myConf, clientUrih, pkgId) {
var appApiGrantsPath = path.join(myConf.appApiGrantsPath, clientUrih);
return fs.readFileAsync(appApiGrantsPath, 'utf8').then(function (text) {
return text.trim().split(/\n/);
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}, function (err) {
if ('ENOENT' !== err.code) {
console.error(err);
}
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return [];
}).then(function (apis) {
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if (apis.some(function (api) {
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if (api === pkgId) {
return true;
}
})) {
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return true;
}
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if (clientUrih === ('api.' + xconfx.setupDomain) && 'org.oauth3.consumer' === pkgId) {
// fallthrough
return true;
} else {
return null;
}
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});
}
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function getSitePackageConfig(clientUrih, pkgId) {
var siteConfigPath = path.join(xconfx.appConfigPath, clientUrih);
return mkdirpAsync(siteConfigPath).then(function () {
return fs.readFileAsync(path.join(siteConfigPath, pkgId + '.json'), 'utf8').then(function (text) {
return JSON.parse(text);
}).then(function (data) { return data; }, function (/*err*/) { return {}; });
});
}
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function getSiteConfig(clientUrih) {
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// TODO test if the requesting package has permission to the root-level site config
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var siteConfigPath = path.join(xconfx.appConfigPath, clientUrih);
return mkdirpAsync(siteConfigPath).then(function () {
return fs.readFileAsync(path.join(siteConfigPath, 'config.json'), 'utf8').then(function (text) {
return JSON.parse(text);
}).then(function (data) { return data; }, function (/*err*/) { return {}; });
});
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}
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var modelsCache = {};
function getSiteStore(clientUrih, pkgId, dir) {
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if (!modelsCache[clientUrih]) {
modelsCache[clientUrih] = apiFactories.systemSqlFactory.create({
init: true
, dbname: clientUrih // '#' is a valid file name character
});
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}
// DB scopes:
// system (global)
// experience (per domain)
// api (per api)
// account (per user account)
// client (per 3rd party client)
// scope Experience to db
// scope Api by table
// scope Account and Client by column
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return modelsCache[clientUrih].then(function (db) {
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var wrap = require('masterquest-sqlite3');
return wrap.wrap(db, dir).then(function (models) {
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//modelsCache[clientUrih] = PromiseA.resolve(models);
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return models;
});
});
}
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function accountRequiredById(req, res, next) {
var promise = req.oauth3.verifyAsync().then(function (/*result*/) {
var tok = req.oauth3.token;
var accountId = req.params.accountId || '__NO_ID_GIVEN__';
var ppid;
if (tok.sub && tok.sub.split(/,/g).filter(function (ppid) {
return ppid === accountId;
}).length) {
ppid = accountId;
}
if (tok.axs && tok.axs.filter(function (acc) {
return acc.id === accountId || acc.appScopedId === accountId;
}).length) {
ppid = accountId;
}
if (tok.acx && accountId === (tok.acx.appScopedId || tok.acx.id || tok.acx)) {
ppid = accountId;
}
if (!ppid) {
return PromiseA.reject(new Error("missing accountId '" + accountId + "' in access token"));
}
return req.oauth3.rescope(ppid).then(function (accountIdx) {
req.oauth3.accountIdx = accountIdx;
req.oauth3.ppid = ppid;
req.oauth3.accountHash = crypto.createHash('sha1').update(accountIdx).digest('hex');
//console.log('[com.daplie.walnut] accountIdx:', accountIdx);
//console.log('[com.daplie.walnut] ppid:', ppid);
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next();
});
});
rejectableRequest(req, res, promise, "[com.daplie.walnut] attach account by id");
}
function accountRequired(req, res, next) {
// if this already has auth, great
if (req.oauth3.ppid) {
next();
return;
}
// being public does not disallow authentication
if (req.isPublic && !req.oauth3.encodedToken) {
next();
return;
}
if (!req.oauth3.encodedToken) {
rejectableRequest(
req
, res
, PromiseA.reject(new Error("this secure resource requires an access token"))
, "[com.daplie.walnut] required account (not /public)"
);
return;
}
// verify the auth if it's here
var promise = req.oauth3.verifyAsync().then(function (/*result*/) {
var tok = req.oauth3.token;
var ppid;
var err;
if (tok.sub) {
if (tok.sub.split(/,/g).length > 1) {
err = new Error("more than one 'sub' specified in token");
return PromiseA.reject(err);
}
ppid = tok.sub;
}
else if (tok.axs && tok.axs.length) {
if (tok.axs.length > 1) {
err = new Error("more than one 'axs' specified in token (also, update to using 'sub' instead)");
return PromiseA.reject(err);
}
ppid = tok.axs[0].appScopedId || tok.axs[0].id;
}
else if (tok.acx) {
ppid = tok.acx.appScopedId || tok.acx.id || tok.acx;
}
if (!ppid) {
return PromiseA.reject(new Error("could not determine accountId from access token"));
}
return req.oauth3.rescope(ppid).then(function (accountIdx) {
req.oauth3.accountIdx = accountIdx;
req.oauth3.ppid = ppid;
req.oauth3.accountHash = crypto.createHash('sha1').update(accountIdx).digest('hex');
next();
});
});
rejectableRequest(req, res, promise, "[com.daplie.walnut] required account (not /public)");
}
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function loadRestHelper(myConf, clientUrih, pkgId) {
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var pkgPath = path.join(myConf.restPath, pkgId);
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var pkgLinks = [];
pkgLinks.push(pkgId);
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// TODO allow recursion, but catch cycles
return fs.lstatAsync(pkgPath).then(function (stat) {
if (!stat.isFile()) {
return;
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}
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return fs.readFileAsync(pkgPath, 'utf8').then(function (text) {
pkgId = text.trim();
pkgPath = path.join(myConf.restPath, pkgId);
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});
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}, function () {
// ignore error
return;
}).then(function () {
// TODO should not require package.json. Should work with files alone.
return fs.readFileAsync(path.join(pkgPath, 'package.json'), 'utf8').then(function (text) {
var pkg = JSON.parse(text);
var pkgDeps = {};
var myApp;
if (pkg.walnut) {
pkgPath = path.join(pkgPath, pkg.walnut);
}
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Object.keys(apiDeps).forEach(function (key) {
pkgDeps[key] = apiDeps[key];
});
Object.keys(apiFactories).forEach(function (key) {
pkgDeps[key] = apiFactories[key];
});
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// TODO pull db stuff from package.json somehow and pass allowed data models as deps
//
// how can we tell which of these would be correct?
// deps.memstore = apiFactories.memstoreFactory.create(pkgId);
// deps.memstore = apiFactories.memstoreFactory.create(req.experienceId);
// deps.memstore = apiFactories.memstoreFactory.create(req.experienceId + pkgId);
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// let's go with this one for now and the api can choose to scope or not to scope
pkgDeps.memstore = apiFactories.memstoreFactory.create(pkgId);
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console.log('DEBUG pkgPath', pkgPath);
myApp = express();
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myApp.handlePromise = promisableRequest;
myApp.handleRejection = rejectableRequest;
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myApp.grantsRequired = function (grants) {
if (!Array.isArray(grants)) {
throw new Error("Usage: app.grantsRequired([ 'name|altname|altname2', 'othergrant' ])");
}
if (!grants.length) {
return function (req, res, next) {
next();
};
}
return function (req, res, next) {
var tokenScopes;
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if (!(req.oauth3 || req.oauth3.token)) {
// TODO some error generator for standard messages
res.send({ error: { message: "You must be logged in", code: "E_NO_AUTHN" } });
return;
}
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if ('string' !== typeof req.oauth3.token.scp) {
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res.send({ error: { message: "Token must contain a grants string in 'scp'", code: "E_NO_GRANTS" } });
return;
}
tokenScopes = req.oauth3.token.scp.split(/[,\s]+/mg);
if (-1 !== tokenScopes.indexOf('*')) {
// has full account access
next();
return;
}
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// every grant in the array must be present
if (!grants.every(function (grant) {
var scopes = grant.split(/\|/g);
return scopes.some(function (scp) {
return tokenScopes.some(function (s) {
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return scp === s;
});
});
})) {
res.send({ error: { message: "Token does not contain valid grants: '" + grants + "'", code: "E_NO_GRANTS" } });
return;
}
next();
};
};
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var _getOauth3Controllers = pkgDeps.getOauth3Controllers = require('oauthcommon/example-oauthmodels').create(
{ sqlite3Sock: xconfx.sqlite3Sock, ipcKey: xconfx.ipcKey }
).getControllers;
//require('oauthcommon').inject(packagedApi._getOauth3Controllers, packagedApi._api, pkgConf, pkgDeps);
require('oauthcommon').inject(_getOauth3Controllers, myApp/*, pkgConf, pkgDeps*/);
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// TODO delete these caches when config changes
var _stripe;
var _stripe_test;
var _mandrill;
var _mailchimp;
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var _twilio;
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myApp.use('/', function preHandler(req, res, next) {
return getSiteConfig(clientUrih).then(function (siteConfig) {
Object.defineProperty(req, 'getSiteMailer', {
enumerable: true
, configurable: false
, writable: false
, value: function getSiteMailerProp() {
var nodemailer = require('nodemailer');
var transport = require('nodemailer-mailgun-transport');
//var mailconf = require('../../../com.daplie.mailer/config.mailgun');
var mailconf = siteConfig['mailgun.org'];
var mailer = PromiseA.promisifyAll(nodemailer.createTransport(transport(mailconf)));
return mailer;
}
});
Object.defineProperty(req, 'getSiteConfig', {
enumerable: true
, configurable: false
, writable: false
, value: function getSiteConfigProp(section) {
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// deprecated
if ('com.daplie.tel' === section) {
section = 'tel@daplie.com';
}
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return PromiseA.resolve((siteConfig || {})[section]);
}
});
Object.defineProperty(req, 'getSitePackageConfig', {
enumerable: true
, configurable: false
, writable: false
, value: function getSitePackageConfigProp() {
return getSitePackageConfig(clientUrih, pkgId);
}
});
Object.defineProperty(req, 'getSiteStore', {
enumerable: true
, configurable: false
, writable: false
, value: function getSiteStoreProp() {
var restPath = path.join(myConf.restPath, pkgId);
var apiPath = path.join(myConf.apiPath, pkgId);
var dir;
// TODO usage package.json as a falback if the standard location is not used
try {
dir = require(path.join(apiPath, 'models.js'));
} catch(e) {
dir = require(path.join(restPath, 'models.js'));
}
return getSiteStore(clientUrih, pkgId, dir);
}
});
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/*
Object.defineProperty(req, 'getSitePayments', {
enumerable: true
, configurable: false
, writable: false
, value: function getSitePaymentsProp() {
}
});
*/
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// TODO allow third-party clients stripe ids destination
// https://stripe.com/docs/connect/payments-fees
Object.defineProperty(req, 'Stripe', {
enumerable: true
, configurable: false
, get: function () {
_stripe = _stripe || require('stripe')(siteConfig['stripe.com'].live.secret);
return _stripe;
}
});
Object.defineProperty(req, 'StripeTest', {
enumerable: true
, configurable: false
, get: function () {
_stripe_test = _stripe_test || require('stripe')(siteConfig['stripe.com'].test.secret);
return _stripe_test;
}
});
Object.defineProperty(req, 'Mandrill', {
enumerable: true
, configurable: false
, get: function () {
if (!_mandrill) {
var Mandrill = require('mandrill-api/mandrill');
_mandrill = new Mandrill.Mandrill(siteConfig['mandrill.com'].apiKey);
_mandrill.messages.sendTemplateAsync = function (opts) {
return new PromiseA(function (resolve, reject) {
_mandrill.messages.sendTemplate(opts, resolve, reject);
});
};
}
return _mandrill;
}
});
Object.defineProperty(req, 'Mailchimp', {
enumerable: true
, configurable: false
, get: function () {
var Mailchimp = require('mailchimp-api-v3');
_mailchimp = _mailchimp || new Mailchimp(siteConfig['mailchimp.com'].apiKey);
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return _mailchimp;
}
});
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var Twilio = require('twilio');
function twilioTel(/*opts*/) {
if (_twilio) {
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return apiDeps.Promise.resolve(_twilio);
}
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_twilio = new Twilio.RestClient(
siteConfig['twilio.com'].live.id
, siteConfig['twilio.com'].live.auth
);
return apiDeps.Promise.resolve(_twilio);
}
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// TODO shared memory db
var mailgunTokens = {};
function validateMailgun(apiKey, timestamp, token, signature) {
// https://gist.github.com/coolaj86/81a3b61353d2f0a2552c
// (realized later)
// HAHA HAHA HAHAHAHAHA this is my own gist... so much more polite attribution
var scmp = require('scmp')
, crypto = require('crypto')
, mailgunExpirey = 15 * 60 * 1000
, mailgunHashType = 'sha256'
, mailgunSignatureEncoding = 'hex'
;
var actual
, adjustedTimestamp = parseInt(timestamp, 10) * 1000
, fresh = (Math.abs(Date.now() - adjustedTimestamp) < mailgunExpirey)
;
if (!fresh) {
console.error('[mailgun] Stale Timestamp: this may be an attack');
console.error('[mailgun] However, this is most likely your fault\n');
console.error('[mailgun] run `ntpdate ntp.ubuntu.com` and check your system clock\n');
console.error('[mailgun] System Time: ' + new Date().toString());
console.error('[mailgun] Mailgun Time: ' + new Date(adjustedTimestamp).toString(), timestamp);
console.error('[mailgun] Delta: ' + (Date.now() - adjustedTimestamp));
return false;
}
if (mailgunTokens[token]) {
console.error('[mailgun] Replay Attack');
return false;
}
mailgunTokens[token] = true;
setTimeout(function () {
delete mailgunTokens[token];
}, mailgunExpirey + (5 * 1000));
actual = crypto.createHmac(mailgunHashType, apiKey)
.update(new Buffer(timestamp + token, 'utf8'))
.digest(mailgunSignatureEncoding)
;
return scmp(signature, actual);
}
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function mailgunMail(/*opts*/) {
return apiDeps.Promise.resolve(req.getSiteMailer());
}
// Twilio Parameters are often 26 long
var bodyParserTwilio = require('body-parser').urlencoded({ limit: '4kb', parameterLimit: 100, extended: false });
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// Mailgun has something like 50 parameters
var bodyParserMailgun = require('body-parser').urlencoded({ limit: '1024kb', parameterLimit: 500, extended: false });
function bodyMultiParserMailgun (req, res, next) {
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var multiparty = require('multiparty');
var form = new multiparty.Form();
form.parse(req, function (err, fields/*, files*/) {
if (err) {
console.error('Error');
console.error(err);
res.end("Couldn't parse form");
return;
}
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var body;
req.body = req.body || {};
Object.keys(fields).forEach(function (key) {
// TODO what if there were two of something?
// (even though there won't be)
req.body[key] = fields[key][0];
});
body = req.body;
next();
});
}
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function daplieTel() {
return twilioTel().then(function (twilio) {
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function sms(opts) {
// opts = { to, from, body }
return new apiDeps.Promise(function (resolve, reject) {
twilio.sendSms(opts, function (err, resp) {
if (err) {
reject(err);
return;
}
resolve(resp);
});
});
}
return {
sms: sms
, mms: function () { throw new Error('MMS Not Implemented'); }
};
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});
}
var caps = {
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//
// Capabilities for APIs
//
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'email@daplie.com': mailgunMail // whichever mailer
, 'mailer@daplie.com': mailgunMail // whichever mailer
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, 'mailgun@daplie.com': mailgunMail // specifically mailgun
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, 'tel@daplie.com': daplieTel // whichever telephony service
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, 'twilio@daplie.com': twilioTel // specifically twilio
, 'com.daplie.tel.twilio': twilioTel // deprecated alias
//
// Webhook Parsers
//
//, 'mailgun.urlencoded@daplie.com': function (req, res, next) { ... }
, 'mailgun.parsers@daplie.com': function (req, res, next) {
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var chunks = [];
req.on('data', function (chunk) {
chunks.push(chunk);
});
req.on('end', function () {
});
function verify() {
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var body = req.body;
var mailconf = siteConfig['mailgun.org'];
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if (!body.timestamp) {
console.log('mailgun parser req.headers');
console.log(req.headers);
chunks.forEach(function (datum) {
console.log('Length:', datum.length);
//console.log(datum.toString('utf8'));
});
console.log('weird body');
console.log(body);
}
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if (!validateMailgun(mailconf.apiKey, body.timestamp, body.token, body.signature)) {
console.error('Request came, but not from Mailgun');
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console.error(req.url);
console.error(req.headers);
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res.send({ error: { message: 'Invalid signature. Are you even Mailgun?' } });
return;
}
next();
}
if (/urlencoded/.test(req.headers['content-type'])) {
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console.log('urlencoded');
bodyParserMailgun(req, res, verify);
}
else if (/multipart/.test(req.headers['content-type'])) {
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console.log('multipart');
bodyMultiParserMailgun(req, res, verify);
}
else {
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console.log('no parser');
next();
}
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}
, 'twilio.urlencoded@daplie.com': function (req, res, next) {
// TODO null for res and Promise instead of next?
return bodyParserTwilio(req, res, function () {
var signature = req.headers['x-twilio-signature'];
var auth = siteConfig['twilio.com'].live.auth;
var fullUrl = 'https://' + req.headers.host + req._walnutOriginalUrl;
var validSig = Twilio.validateRequest(auth, signature, fullUrl, req.body);
/*
console.log('Twilio Signature Check');
console.log('auth', auth);
console.log('sig', signature);
console.log('fullUrl', fullUrl);
console.log(req.body);
console.log('valid', validSig);
*/
if (!validSig) {
res.statusCode = 401;
res.setHeader('Content-Type', 'text/xml');
res.end('<Error>Invalid signature. Are you even Twilio?</Error>');
return;
}
// TODO session via db req.body.CallId req.body.smsId
next();
});
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}
};
req.getSiteCapability = function (capname, opts, b, c) {
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if (caps[capname]) {
return caps[capname](opts, b, c);
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}
return apiDeps.Promise.reject(
new Error("['" + req.clientApiUri + '/' + pkgId + "'] "
+ "capability '" + capname + "' not implemented")
);
};
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req._walnutOriginalUrl = req.url;
// "/path/api/com.example/hello".replace(/.*\/api\//, '').replace(/([^\/]*\/+)/, '/') => '/hello'
req.url = req.url.replace(/\/api\//, '').replace(/.*\/api\//, '').replace(/([^\/]*\/+)/, '/');
next();
});
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});
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myApp.use('/public', function preHandler(req, res, next) {
// TODO authenticate or use guest user
req.isPublic = true;
next();
});
myApp.use('/accounts/:accountId', accountRequiredById);
myApp.use('/acl', accountRequired);
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//
// TODO handle /accounts/:accountId
//
return PromiseA.resolve(require(pkgPath).create({
etcpath: xconfx.etcpath
}/*pkgConf*/, pkgDeps/*pkgDeps*/, myApp/*myApp*/)).then(function (handler) {
myApp.use('/', function postHandler(req, res, next) {
req.url = req._walnutOriginalUrl;
next();
});
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localCache.pkgs[pkgId] = { pkgId: pkgId, pkg: pkg, handler: handler || myApp, createdAt: Date.now() };
pkgLinks.forEach(function (pkgLink) {
localCache.pkgs[pkgLink] = localCache.pkgs[pkgId];
});
return localCache.pkgs[pkgId];
});
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});
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});
}
// Read packages/apis/sub.sld.tld (forward dns) to find list of apis as tld.sld.sub (reverse dns)
// TODO packages/allowed_apis/sub.sld.tld (?)
// TODO auto-register org.oauth3.consumer for primaryDomain (and all sites?)
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function loadRestHandler(myConf, clientUrih, pkgId) {
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return PromiseA.resolve().then(function () {
if (!localCache.pkgs[pkgId]) {
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return loadRestHelper(myConf, clientUrih, pkgId);
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}
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return localCache.pkgs[pkgId];
// TODO expire require cache
/*
if (Date.now() - localCache.pkgs[pkgId].createdAt < (5 * 60 * 1000)) {
return;
}
*/
}, function (/*err*/) {
// TODO what kind of errors might we want to handle?
return null;
}).then(function (restPkg) {
return restPkg;
});
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}
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var CORS = require('connect-cors');
var cors = CORS({ credentials: true, headers: [
'X-Requested-With'
, 'X-HTTP-Method-Override'
, 'Content-Type'
, 'Accept'
, 'Authorization'
], methods: [ "GET", "POST", "PATCH", "PUT", "DELETE" ] });
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var staleAfter = (5 * 60 * 1000);
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return function (req, res, next) {
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cors(req, res, function () {
if (xconfx.debug) { console.log('[api.js] post cors'); }
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// Canonical client names
// example.com should use api.example.com/api for all requests
// sub.example.com/api should resolve to sub.example.com
// example.com/subpath/api should resolve to example.com#subapp
// sub.example.com/subpath/api should resolve to sub.example.com#subapp
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var clientUrih = req.hostname.replace(/^api\./, '') + req.url.replace(/\/api\/.*/, '/').replace(/\/+/g, '#').replace(/#$/, '');
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var clientApiUri = req.hostname + req.url.replace(/\/api\/.*/, '/').replace(/\/$/, '');
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// Canonical package names
// '/api/com.daplie.hello/hello' should resolve to 'com.daplie.hello'
// '/subapp/api/com.daplie.hello/hello' should also 'com.daplie.hello'
// '/subapp/api/com.daplie.hello/' may exist... must be a small api
var pkgId = req.url.replace(/.*\/api\//, '').replace(/^\//, '').replace(/\/.*/, '');
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var now = Date.now();
var hasBeenHandled = false;
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// Existing (Deprecated)
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Object.defineProperty(req, 'apiUrlPrefix', {
enumerable: true
, configurable: false
, writable: false
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, value: 'https://' + clientApiUri + '/api/' + pkgId
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});
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Object.defineProperty(req, 'experienceId', {
enumerable: true
, configurable: false
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, writable: false
, value: clientUrih
});
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Object.defineProperty(req, 'clientApiUri', {
enumerable: true
, configurable: false
, writable: false
, value: clientApiUri
});
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Object.defineProperty(req, 'apiId', {
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enumerable: true
, configurable: false
, writable: false
, value: pkgId
});
// New
Object.defineProperty(req, 'clientUrih', {
enumerable: true
, configurable: false
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, writable: false
// TODO this identifier may need to be non-deterministic as to transfer if a domain name changes but is still the "same" app
// (i.e. a company name change. maybe auto vs manual register - just like oauth3?)
// NOTE: probably best to alias the name logically
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, value: clientUrih
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});
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Object.defineProperty(req, 'pkgId', {
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enumerable: true
, configurable: false
, writable: false
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, value: pkgId
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});
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// TODO cache permission (although the FS is already cached, NBD)
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var promise = isThisClientAllowedToUseThisPkg(xconfx, clientUrih, pkgId).then(function (yes) {
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if (!yes) {
notConfigured(req, res);
return null;
}
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if (localCache.rests[pkgId]) {
localCache.rests[pkgId].handler(req, res, next);
hasBeenHandled = true;
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if (now - localCache.rests[pkgId].createdAt > staleAfter) {
localCache.rests[pkgId] = null;
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}
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}
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if (!localCache.rests[pkgId]) {
//return doesThisPkgExist
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return loadRestHandler(xconfx, clientUrih, pkgId).then(function (myHandler) {
if (!myHandler) {
notConfigured(req, res);
return;
}
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localCache.rests[pkgId] = { handler: myHandler.handler, createdAt: now };
if (!hasBeenHandled) {
myHandler.handler(req, res, next);
}
});
}
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});
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rejectableRequest(req, res, promise, "[com.daplie.walnut] load api package");
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});
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};
};