greenlock-express.js/examples/vhost.js

135 lines
4.3 KiB
JavaScript

#!/usr/bin/env node
"use strict";
///////////////////
// vhost example //
///////////////////
//
// virtual hosting example
//
// The prefix where sites go by name.
// For example: whatever.com may live in /srv/www/whatever.com, thus /srv/www is our path
var srv = process.argv[3] || "/srv/www/";
var path = require("path");
var fs = require("fs").promises;
var finalhandler = require("finalhandler");
var serveStatic = require("serve-static");
//var glx = require('greenlock-express')
var glx = require("./").create({
version: "draft-11", // Let's Encrypt v2 is ACME draft 11
server: "https://acme-v02.api.letsencrypt.org/directory", // If at first you don't succeed, stop and switch to staging
// https://acme-staging-v02.api.letsencrypt.org/directory
configDir: process.argv[4] || "~/.config/acme/", // You MUST have access to write to directory where certs
// are saved. ex: /home/foouser/.config/acme
approveDomains: myApproveDomains, // Greenlock's wraps around tls.SNICallback. Check the
// domain name here and reject invalid ones
app: myVhostApp, // Any node-style http app (i.e. express, koa, hapi, rill)
/* CHANGE TO A VALID EMAIL */
email: process.argv[2] || "jon.doe@example.com", // Email for Let's Encrypt account and Greenlock Security
agreeTos: true // Accept Let's Encrypt ToS
//, communityMember: true // Join Greenlock to get important updates, no spam
//, debug: true
});
var server = glx.listen(80, 443);
server.on("listening", function() {
console.info(server.type + " listening on", server.address());
});
function myApproveDomains(opts, certs, cb) {
console.log("sni:", opts.domain);
// In this example the filesystem is our "database".
// We check in /srv/www for whatever.com and if it exists, it's allowed
// SECURITY Greenlock validates opts.domains ahead-of-time so you don't have to
return checkWwws(opts.domains[0])
.then(function() {
//opts.email = email;
opts.agreeTos = true;
cb(null, { options: opts, certs: certs });
})
.catch(cb);
}
function checkWwws(_hostname) {
if (!_hostname) {
// SECURITY, don't allow access to the 'srv' root
// (greenlock-express uses middleware to check '..', etc)
return "";
}
var hostname = _hostname;
var _hostdir = path.join(srv, hostname);
var hostdir = _hostdir;
// TODO could test for www/no-www both in directory
return fs
.readdir(hostdir)
.then(function() {
// TODO check for some sort of htaccess.json and use email in that
// NOTE: you can also change other options such as `challengeType` and `challenge`
// opts.challengeType = 'http-01';
// opts.challenge = require('le-challenge-fs').create({});
return hostname;
})
.catch(function() {
if ("www." === hostname.slice(0, 4)) {
// Assume we'll redirect to non-www if it's available.
hostname = hostname.slice(4);
hostdir = path.join(srv, hostname);
return fs.readdir(hostdir).then(function() {
// TODO list both domains?
return hostname;
});
} else {
// Or check and see if perhaps we should redirect non-www to www
hostname = "www." + hostname;
hostdir = path.join(srv, hostname);
return fs.readdir(hostdir).then(function() {
// TODO list both domains?
return hostname;
});
}
})
.catch(function() {
throw new Error("rejecting '" + _hostname + "' because '" + _hostdir + "' could not be read");
});
}
function myVhostApp(req, res) {
// SECURITY greenlock pre-sanitizes hostnames to prevent unauthorized fs access so you don't have to
// (also: only domains approved above will get here)
console.log("vhost:", req.headers.host);
if (!req.headers.host) {
// SECURITY, don't allow access to the 'srv' root
// (greenlock-express uses middleware to check '..', etc)
return res.end();
}
// We could cache wether or not a host exists for some amount of time
var fin = finalhandler(req, res);
return checkWwws(req.headers.host)
.then(function(hostname) {
if (hostname !== req.headers.host) {
res.statusCode = 302;
res.setHeader("Location", "https://" + hostname);
// SECURITY this is safe only because greenlock disallows invalid hostnames
res.end("<!-- redirecting to https://" + hostname + "-->");
return;
}
var serve = serveStatic(path.join(srv, hostname), { redirect: true });
serve(req, res, fin);
})
.catch(function() {
fin();
});
}