updated buffered nonce reading

lib/WebSocketServer.js

@@ -313,9 +313,23 @@ function handleHixieUpgrade(req, socket, upgradeHead, cb) {
     completeHandshake.call(this, nonce, rest);
   }
   else {
-    throw new Error('not supported');
-    // ... wait for enough data
-    // call completeHandshake with a slice of the head
+    var nonce = new Buffer(8);
+    upgradeHead.copy(nonce, 0);
+    var received = upgradeHead.length;
+    var rest = null;
+    var self = this;
+    var handler = function (data) {
+      var toRead = Math.min(data.length, 8 - received);
+      if (toRead === 0) return;
+      data.copy(nonce, received, 0, toRead);
+      received += toRead;
+      if (received == 8) {
+        socket.removeListener('data', handler);
+        if (toRead < data.length) rest = data.slice(toRead);
+        completeHandshake.call(self, nonce, rest);
+      }
+    }
+    socket.on('data', handler);
   }
 }