88 lines
2.4 KiB
JavaScript
88 lines
2.4 KiB
JavaScript
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'use strict';
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var staticHandlers = {};
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function loadPages(pkgConf, packagedPage, req, res, next) {
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var PromiseA = require('bluebird');
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var fs = require('fs');
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var path = require('path');
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var pkgpath = path.join(pkgConf.pagespath, (packagedPage.package || packagedPage.id), (packagedPage.version || ''));
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// TODO special cases for /.well_known/ and similar (oauth3.html, oauth3.json, webfinger, etc)
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function handlePromise(p) {
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p.then(function (app) {
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app(req, res, next);
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packagedPage._page = app;
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}, function (err) {
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console.error('[App Promise Error]');
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next(err);
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});
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}
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if (staticHandlers[pkgpath]) {
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packagedPage._page = staticHandlers[pkgpath];
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packagedPage._page(req, res, next);
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return;
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}
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if (!packagedPage._promise_page) {
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packagedPage._promise_page = new PromiseA(function (resolve, reject) {
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fs.exists(pkgpath, function (exists) {
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var staticServer;
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if (!exists) {
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reject(new Error("package '" + pkgpath + "' is registered but does not exist"));
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return;
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}
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//console.log('[static mount]', pkgpath);
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// https://github.com/expressjs/serve-static/issues/54
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// https://github.com/pillarjs/send/issues/91
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// https://example.com/.well-known/acme-challenge/xxxxxxxxxxxxxxx
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staticServer = require('serve-static')(pkgpath, { dotfiles: undefined });
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resolve(staticServer);
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});
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});
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}
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handlePromise(packagedPage._promise_page);
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}
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function layerItUp(pkgConf, router, req, res, next) {
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var nexti = -1;
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// Layers exist so that static apps can use them like a virtual filesystem
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// i.e. oauth3.html isn't in *your* app but you may use it and want it mounted at /.well-known/oauth3.html
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// or perhaps some dynamic content (like application cache)
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function nextify(err) {
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var packagedPage;
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nexti += 1;
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if (err) {
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next(err);
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return;
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}
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// shortest to longest
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//route = packages.pop();
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// longest to shortest
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packagedPage = router.packagedPages[nexti];
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if (!packagedPage) {
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next();
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return;
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}
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if (packagedPage._page) {
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packagedPage._page(req, res, nextify);
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return;
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}
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// could attach to req.{ pkgConf, pkgDeps, Services}
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loadPages(pkgConf, packagedPage, req, res, next);
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}
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nextify();
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}
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module.exports.layerItUp = layerItUp;
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