add websocket example

examples/websockets.js

@@ -0,0 +1,67 @@
+'use strict';
+
+
+////////////////////////
+// Greenlock Setup    //
+////////////////////////
+
+//var Greenlock = require('greenlock-express');
+var Greenlock = require('../');
+var greenlock = Greenlock.create({
+
+  // Let's Encrypt v2 is ACME draft 11
+  // Note: If at first you don't succeed, stop and switch to staging
+  // https://acme-staging-v02.api.letsencrypt.org/directory
+  server: 'https://acme-v02.api.letsencrypt.org/directory'
+, version: 'draft-11'
+, configDir: '~/.config/acme/'
+
+  // You MUST change these to a valid email and domains
+, email: 'john.doe@example.com'
+, approveDomains: [ 'example.com', 'www.example.com' ]
+, agreeTos: true
+
+  // Get notified of important updates and help me make greenlock better
+, communityMember: true
+, telemetry: true
+//, debug: true
+});
+
+
+////////////////////////
+// http-01 Challenges //
+////////////////////////
+
+// http-01 challenge happens over plain http/1.1, not secure http
+var redirectHttps = require('redirect-https')();
+var acmeChallengeHandler = greenlock.middleware(redirectHttps);
+require('http').createServer(acmeChallengeHandler).listen(80, function () {
+  console.log("Listening for ACME http-01 challenges on", this.address());
+});
+
+
+////////////////////////
+// secure http        //
+////////////////////////
+
+var myApp = require('./my-express-app.js');
+// Use spdy for "h2" (http2) as to not be penalized by Google
+var server = require('spdy').createSecureServer(greenlock.tlsOptions, myApp);
+
+
+////////////////////////
+// secure websockets  //
+////////////////////////
+
+var WebSocket = require('ws');
+var ws = new WebSocket.Server({ server: server });
+ws.on('connection', function (ws, req) {
+  // inspect req.headers.authorization (or cookies) for session info
+  ws.write("[Secure Echo Server] Hello!\nAuth: '" + (req.headers.authorization || '') + "'\n"
+    + "Cookie: '" + (req.headers.cookie || '') + "'\n");
+  ws.on('data', function (data) { ws.write(data); });
+});
+
+server.listen(443, function () {
+  console.log("Listening for secure http and websocket requests on", this.address());
+});