Add Let's Encrypt example

Author: frederickjansen

index.js

@@ -0,0 +1,69 @@
+'use strict';
+
+const LEX = require('greenlock-express');
+const app = require('express')();
+const http = require('http');
+const https = require('https');
+
+// Ensure we don't try to register a certificate unless running on a production server
+var serverUrl = '';
+if (process.env.NODE_ENV === 'production') {
+  serverUrl = 'https://acme-v01.api.letsencrypt.org/directory';
+} else {
+  serverUrl = 'staging';
+}
+
+//
+var lex = LEX.create({
+  server: serverUrl,
+  challenges: {
+    'http-01': require('le-challenge-fs').create({
+      webrootPath: '~/letsencrypt/var/:hostname'
+    })
+  },
+  store: require('le-store-certbot').create({
+    webrootPath: '~/letsencrypt/var/:hostname'
+  }),
+  approveDomains: approveDomains,
+  debug: false
+});
+
+// Validate the domain
+function approveDomains(opts, certs, cb) {
+  if (!/\.multiparty\.io/.test(opts.domain) && opts.domain !== 'multiparty.io') {
+    console.error("bad domain '" + opts.domain + "', not a subdomain of multiparty.io");
+    cb(null, null);
+    return;
+  }
+
+  if (certs) {
+    opts.domains = certs.altnames;
+  }
+  else {
+    opts.domains = ['multiparty.io'];
+    opts.email = '[email protected]';
+    opts.agreeTos = true;
+  }
+  cb(null, {options: opts, certs: certs});
+}
+
+// Run server on port 80 and 443 in production
+if (process.env.NODE_ENV === 'production') {
+  // Redirect port 80 traffic to 443
+  http.createServer(lex.middleware(require('redirect-https')())).listen(80, function () {
+    console.log("Listening for ACME http-01 challenges on", this.address());
+  });
+
+  https.createServer(lex.httpsOptions, lex.middleware(app)).listen(443, function () {
+    console.log("Listening for ACME tls-sni-01 challenges and serve app on", this.address());
+  });
+} else {
+  // Run server on port 8080 for development
+  http.createServer(lex.middleware(app)).listen(8080, function () {
+    console.log("Listening for ACME http-01 challenges on", this.address());
+  });
+}
+
+app.use('/', function (req, res) {
+  res.end('Hello, World!');
+});