Add extra guard which ends the Connection when eof is detected or the stream already has been closed

Author: Devristo

src/Devristo/Phpws/Protocol/WebSocketConnection.php

@@ -32,6 +32,11 @@ public function __construct($socket, LoopInterface $loop, $logger)
 
     public function handleData($stream)
     {
+        if (feof($stream) || !is_resource($stream)){
+            $this->end();
+            return;
+        }
+
         $data = fread($stream, $this->bufferSize);
         if ('' === $data || false === $data) {
             $this->end();