Wrap subscribe, publish, add PubSub example (WIP)

examples/PubSub.js

@@ -0,0 +1,41 @@
+/* Simple pub/sub example (WIP) */
+
+const uWS = require('../dist/uws.js');
+const port = 9001;
+
+const app = uWS./*SSL*/App({
+  key_file_name: 'misc/key.pem',
+  cert_file_name: 'misc/cert.pem',
+  passphrase: '1234'
+}).ws('/*', {
+  /* Options */
+  compression: 0,
+  maxPayloadLength: 16 * 1024 * 1024,
+  idleTimeout: 10,
+  // would be nice to have maxBackpressure to automatically close slow receivers
+  /* Handlers */
+  open: (ws, req) => {
+    /* Let all new sockets subscribe to chat topic */
+    ws.subscribe('chat');
+  },
+  message: (ws, message, isBinary) => {
+    console.log('Got WebSocket message!');
+    /* If we get a message from any socket, we publish it to the chat topic */
+    ws.publish('chat', message);
+  },
+  drain: (ws) => {
+
+  },
+  close: (ws, code, message) => {
+    // here we need to properly unsubscribe
+    // ws.unsubscribe('*');
+  }
+}).any('/*', (res, req) => {
+  res.end('Nothing to see here!');
+}).listen(port, (token) => {
+  if (token) {
+    console.log('Listening to port ' + port);
+  } else {
+    console.log('Failed to listen to port ' + port);
+  }
+});