Use Extensions.close(callback) to make sure close follows all pending messages.

viz.: https://github.com/faye/websocket-extensions-node/commit/1b77290e8279f654089eac963942309fb19b9312

lib/websocket/driver/hybi.js

@@ -153,14 +153,17 @@ var instance = {
   },
 
   text: function(message) {
+    if (this.readyState > 1) return false;
     return this.frame(message, 'text');
   },
 
   binary: function(message) {
+    if (this.readyState > 1) return false;
     return this.frame(message, 'binary');
   },
 
   ping: function(message, callback) {
+    if (this.readyState > 1) return false;
     message = message || '';
     if (callback) this._pingCallbacks[message] = callback;
     return this.frame(message, 'ping');
@@ -175,8 +178,8 @@ var instance = {
       this.emit('close', new Base.CloseEvent(code, reason));
       return true;
     } else if (this.readyState === 1) {
-      this.frame(reason, 'close', code);
       this.readyState = 2;
+      this._extensions.close(function() { this.frame(reason, 'close', code) }, this);
       return true;
     } else {
       return false;
@@ -185,7 +188,7 @@ var instance = {
 
   frame: function(data, type, code) {
     if (this.readyState <= 0) return this._queue([data, type, code]);
-    if (this.readyState !== 1) return false;
+    if (this.readyState > 2) return false;
 
     if (data instanceof Array) data = new Buffer(data);
 
@@ -288,13 +291,16 @@ var instance = {
   },
 
   _shutdown: function(code, reason) {
-    this.frame(reason, 'close', code);
     delete this._frame;
     delete this._message;
-    this.readyState = 3;
+    this.readyState = 2;
     this._stage = 5;
-    this.emit('close', new Base.CloseEvent(code, reason));
-    this._extensions.close();
+
+    this._extensions.close(function() {
+      this.frame(reason, 'close', code);
+      this.readyState = 3;
+      this.emit('close', new Base.CloseEvent(code, reason));
+    }, this);
   },
 
   _fail: function(type, message) {