walnut.js/lib/package-server.js

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'use strict';
var escapeStringRegexp = require('escape-string-regexp');
var staticHandlers = {};
//var apiHandlers = {};
function compileVhosts(vhostsMap) {
var results = {
patterns: []
, conflictsMap: {}
, matchesMap: {}
};
// compli
Object.keys(vhostsMap).forEach(function (key) {
var vhost = vhostsMap[key];
var bare;
var www;
if ('.' === vhost.hostname[0]) {
// for consistency
// TODO this should happen at the database level
vhost.hostname = '*' + vhost.hostname;
}
if ('*' === vhost.hostname[0]) {
// TODO check that we are not trying to redirect a tld (.com, .co.uk, .org, etc)
// tlds should follow the global policy
if (vhost.hostname[1] && '.' !== vhost.hostname[1]) {
// this is not a good place to throw as the consequences of a bug would be
// very bad, but errors should never be silent, so we'll compromise
console.warn("[NON-FATAL ERROR]: ignoring pattern '" + vhost.hostname + "'");
results.conflictsMap[vhost.hostname] = vhost;
}
// nix the '*' for easier matching
vhost.hostname = vhost.hostname.slice(1);
// except the default
if (!vhost.hostname) {
vhost.hostname = '*';
}
if (results.conflictsMap[vhost.hostname]) {
console.warn("[NON-FATAL ERROR]: duplicate entry for pattern '" + vhost.hostname + "'");
}
results.conflictsMap[vhost.hostname] = vhost;
results.patterns.push(vhost);
return;
}
//console.log('[vhost]');
//console.log(vhost);
bare = vhost.hostname.replace(/^www\./i, '');
www = vhost.hostname.replace(/^(www\.)?/i, 'www.');
results.matchesMap[bare] = vhost;
results.matchesMap[www] = vhost;
});
results.patterns.sort(function (a, b) {
return b.id.length - a.id.length;
});
return results;
}
function loadPages(pkgConf, route, req, res, next) {
var PromiseA = require('bluebird');
var fs = require('fs');
var path = require('path');
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var pkgpath = path.join(pkgConf.pagespath, (route.app.package || route.app.id), (route.app.version || ''));
// TODO special cases for /.well_known/ and similar (oauth3.html, oauth3.json, webfinger, etc)
function handlePromise(p) {
p.then(function (app) {
app(req, res, next);
route._app = app;
}, function (err) {
console.error('[App Promise Error]');
next(err);
});
}
if (staticHandlers[pkgpath]) {
route._app = staticHandlers[pkgpath];
route._app(req, res, next);
return;
}
if (!route._promise_app) {
route._promise_app = new PromiseA(function (resolve, reject) {
fs.exists(pkgpath, function (exists) {
if (!exists) {
reject(new Error("package is registered but does not exist"));
return;
}
//console.log('[static mount]', pkgpath);
resolve(require('serve-static')(pkgpath));
});
});
}
handlePromise(route._promise_app);
}
function getApi(pkgConf, pkgDeps, route) {
var PromiseA = require('bluebird');
var path = require('path');
var pkgpath = path.join(pkgConf.apipath, route.api.id/*, (route.api.version || '')*/);
// TODO needs some version stuff (which would also allow hot-loading of updates)
// TODO version could be tied to sha256sum
return new PromiseA(function (resolve, reject) {
var myApp;
var ursa;
var promise;
// TODO dynamic requires are a no-no
// can we statically generate a require-er? on each install?
// module.exports = { {{pkgpath}}: function () { return require({{pkgpath}}) } }
// requirer[pkgpath]()
myApp = pkgDeps.express();
myApp.disable('x-powered-by');
if (pkgDeps.app.get('trust proxy')) {
myApp.set('trust proxy', pkgDeps.app.get('trust proxy'));
}
if (!pkgConf.pubkey) {
/*
return ursa.createPrivateKey(pem, password, encoding);
var pem = myKey.toPrivatePem();
return jwt.verifyAsync(token, myKey.toPublicPem(), { ignoreExpiration: false && true }).then(function (decoded) {
});
*/
ursa = require('ursa');
pkgConf.keypair = ursa.createPrivateKey(pkgConf.privkey, 'ascii');
pkgConf.pubkey = ursa.createPublicKey(pkgConf.pubkey, 'ascii'); //conf.keypair.toPublicKey();
}
try {
route._apipkg = require(path.join(pkgpath, 'package.json'));
route._apiname = route._apipkg.name;
if (route._apipkg.walnut) {
pkgpath += '/' + route.apipkg.walnut;
}
promise = require(pkgpath).create(pkgConf, pkgDeps, myApp);
} catch(e) {
reject(e);
return;
}
promise.then(function () {
// TODO give pub/priv pair for app and all public keys
// route._api = require(pkgpath).create(pkgConf, pkgDeps, myApp);
route._api = require('express')();
route._api_app = myApp;
// TODO fix backwards compat
// /api/com.example.foo (no change)
route._api.use('/', route._api_app);
// /api/com.example.foo => /
route._api.use('/api/' + route.api.id, function (req, res, next) {
//console.log('api mangle 2:', '/api/' + route.api.id, req.url);
route._api_app(req, res, next);
});
// /api/com.example.foo => /api
route._api.use('/', function (req, res, next) {
req.url = '/api' + req.url.slice(('/api/' + route.api.id).length);
//console.log('api mangle 3:', req.url);
route._api_app(req, res, next);
});
resolve(route._api);
}, reject);
});
}
function loadApi(pkgConf, pkgDeps, route) {
function handlePromise(p) {
return p.then(function (api) {
route._api = api;
return api;
});
}
if (!route._promise_api) {
route._promise_api = getApi(pkgConf, pkgDeps, route);
}
return handlePromise(route._promise_api);
}
function layerItUp(pkgConf, router, req, res, next) {
var nexti = -1;
// Layers exist so that static apps can use them like a virtual filesystem
// i.e. oauth3.html isn't in *your* app but you may use it and want it mounted at /.well-known/oauth3.html
// or perhaps some dynamic content (like application cache)
function nextify(err) {
var route;
nexti += 1;
if (err) {
next(err);
return;
}
// shortest to longest
//route = packages.pop();
// longest to shortest
route = router.packages[nexti];
if (!route) {
next();
return;
}
if (!route.app) {
// new Error("no Static App is registered for the specified path")
nextify();
return;
}
if (route._app) {
route._app(req, res, nextify);
return;
}
// could attach to req.{ pkgConf, pkgDeps, Services}
loadPages(pkgConf, route, req, res, next);
}
nextify();
}
function runApi(opts, router, req, res, next) {
var pkgConf = opts.config;
var pkgDeps = opts.deps;
//var Services = opts.Services;
var route;
// TODO compile packagesMap
// TODO people may want to use the framework in a non-framework way (i.e. to conceal the module name)
router.packages.some(function (_route) {
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if (!_route.api) {
return;
}
var pathname = router.pathname;
if ('/' === pathname) {
pathname = '';
}
// TODO allow for special apis that do not follow convention (.well_known, webfinger, oauth3.html, etc)
if (!_route._api_re) {
_route._api_re = new RegExp(escapeStringRegexp(pathname + '/api/' + _route.api.id) + '\/([\\w\\.\\-]+)(\\/|\\?|$)');
//console.log('[api re 2]', _route._api_re);
}
if (_route._api_re.test(req.url)) {
route = _route;
return true;
}
});
if (!route) {
//console.log('[no api route]');
next();
return;
}
Object.defineProperty(req, 'appId', {
enumerable: true
, configurable: false
, 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?)
, value: route.id
});
Object.defineProperty(req, 'appConfig', {
enumerable: true
, configurable: false
, writable: false
, value: {} // TODO just the app-scoped config
});
Object.defineProperty(req, 'appDeps', {
enumerable: true
, configurable: false
, writable: false
, value: {} // TODO app-scoped deps
// i.e. when we need to use things such as stripe id
// without exposing them to the app
});
//
// TODO user authentication should go right about here
//
//
// TODO freeze objects for passing them into app
//
if (route._api) {
route._api(req, res, next);
return;
}
loadApi(pkgConf, pkgDeps, route).then(function (api) {
api(req, res, next);
}, function (err) {
console.error('[App Promise Error]');
next(err);
});
}
function mapToApp(opts, req, res, next) {
// opts = { config, deps, services }
var vhost;
var router;
var pkgConf = opts.config;
if (!pkgConf.vhostConf) {
pkgConf.vhostConf = compileVhosts(pkgConf.vhostsMap);
}
//console.log('req.hostname');
//console.log(req.hostname);
//console.log(Object.keys(pkgConf.vhostConf.matchesMap));
// TODO www vs no-www?
vhost = pkgConf.vhostConf.matchesMap[req.hostname];
if (!vhost) {
pkgConf.vhostConf.patterns.some(function (pkg) {
if ('*' === pkg.id || pkg.id === req.hostname.slice(req.hostname.length - pkg.id.length)) {
vhost = pkg;
return true;
}
});
}
if (!vhost) {
next();
return;
}
//console.log('vhost');
//console.log(vhost);
// TODO don't modify route here (or in subloaders), modify some other variable instead
// TODO precompile RegExps and pre-sort app vs api
vhost.pathnames.some(function (routes) {
var pathname = routes.pathname;
if ('/' === pathname) {
pathname = '';
}
if (!routes._re_app) {
routes._re_app = new RegExp(escapeStringRegexp(pathname) + '(#|\\/|\\?|$)');
//console.log('[static re]', routes._re_app);
}
if (!routes._re_api) {
// TODO allow for special apis that do not follow convention (.well_known, webfinger, oauth3.html, etc)
routes._re_api = new RegExp(escapeStringRegexp(pathname + '/api/') + '([\\w\\.\\-]+)(\\/|\\?|$)');
//console.log('[api re]', routes._re_api);
}
if (routes._re_app.test(req.url)) {
router = routes;
return true;
}
// no need to test for api yet as it is a postfix
});
if (!router) {
//console.log('[no router for]', req.url);
next();
return;
}
if (!router._re_api.test(req.url)) {
//console.log('[static router]');
//console.log(router._re_api, req.url);
layerItUp(pkgConf, router, req, res, next);
return;
}
//console.log('[api router]', req.url);
return runApi(opts, router, req, res, next);
}
module.exports.runApi = runApi;
module.exports.compileVhosts = compileVhosts;
module.exports.mapToApp = mapToApp;