add virtual hosting example

examples/vhost.js

@@ -0,0 +1,95 @@
+#!/usr/bin/env node
+'use strict';
+
+// This is an example for virtual hosting
+
+var email = 'john@example.com';
+// 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 = '/srv/www/';
+
+
+var fs = require('fs');
+var finalhandler = require('finalhandler');
+var serveStatic = require('serve-static');
+var path = require('path');
+var hostnameRe = /^[a-z0-9][\.a-z0-9\-]+$/;
+
+//require('greenlock-express')
+require('../').create({
+
+  // Let's Encrypt v2 is ACME draft 11
+  version: 'draft-11'
+
+  // You MUST change 'acme-staging-v02' to 'acme-v02' in production
+, server: 'https://acme-v02.api.letsencrypt.org/directory'  // staging
+
+, approveDomains: function (opts, certs, cb) {
+    // In this example the filesystem is our "database".
+    // We check in /srv/www for whateve.com and if it exists, it's allowed
+
+
+    // The domains being approved for the first time are listed in opts.domains
+  
+    // Certs being renewed are listed in certs.altnames
+    if (certs) {
+      opts.domains = certs.altnames;
+      cb(null, { options: opts, certs: certs });
+      return;
+    }
+
+    // TODO could test for www/no-www both in directory and IP
+    var e;
+    var hostdir = path.join(srv, opts.domains[0]);
+    if (!hosnameRe.test(opts.domains[0])) {
+      e = new Error("rejecting '" + opts.domains[0] + "' because it is not a valid domain name");
+      cb(e);
+      return;
+    }
+    fs.readdir(hostdir, function (err, nodes) {
+      e = new Error("rejecting '" + opts.domains[0] + "' because '" + hostdir + "' could not be read");
+      if (err || !nodes) {
+        console.error(err);
+        console.error(e);
+        cb(e);
+        return;
+      }
+
+      // 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({});
+      opts.email = email;
+      opts.agreeTos = true;
+      cb(null, { options: opts, certs: certs });
+    });
+
+  }
+
+  // You MUST have access to write to directory where certs are saved
+  // ex: /home/foouser/acme/etc
+, configDir: require('path').join(require('os').homedir(), 'acme', 'etc')
+
+, app: function (req, res) {
+    console.log(req.headers.host);
+    var hostname = (req.headers.host||'').toLowerCase().split(':')[0];
+    // sanatize hostname to prevent unauthorized fs access
+    if (!hostnameRe.test(hostname)) {
+      res.statusCode = 404;
+      res.end('Bad Hostname');
+      return;
+    }
+
+    var serve = serveStatic(path.join(srv, hostname), { redirect: true });
+    serve(req, res, finalhandler(req, res));
+  }
+/*
+  require('express')().use('/', function (req, res) {
+    res.setHeader('Content-Type', 'text/html; charset=utf-8')
+    res.end('Hello, World!\n\n💚 🔒.js');
+  })
+*/
+
+//, debug: true
+
+}).listen(80, 443);